assignment-green building-case study

7/30/2019 Assignment-Green building-case study

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Cover Page


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Table of Contents

Introduction -------------------------------------------------------------Pg 04

1.0 Management --------------------------------------------------------Pg 06

- Credit 1.1.Building Tuning----------------------------------------Pg 06

- Credit 1.2 Building Users Guide---------------------------------Pg 06

2.0 Sustainable Sites--------------------------------------------------------Pg 06

-Credit 2.1 Site Selection--------------------------------------------Pg 07

-Credit 2.2 Development Density and----------------------------Pg 07

Community Connectivity

-Credit 2.3 Brownfield Redevelopment---------------------------Pg 07

- Credit 2.4 Alternative Transportation----------------------------Pg 08

-Credit 2.5 Reduced Site Disturbance------------------------------Pg 08

-Credit 2.6 Storm Water Design, quantity control----------------Pg 08

-Credit 2.7 Storm Water Design, quality control------------------Pg 09

-Credit 2.8 Heat Island Effect, Non-Roof---------------------------Pg 09

-Credit 2.9 Heat Island Effect, Roof---------------------------------Pg 10

-Credit 2.10: Light Pollution Reduction----------------------------Pg 10

3.0 Water Efficiency-----------------------------------------------------------Pg 10

-Credit 3.1 Water Efficient Landscaping---------------------------Pg 10

-Credit 3.2: Water Efficiency in Air Conditioning---------------Pg 10

-Credit 3.3: Innovative Wastewater Technologies--------------Pg 11

-Credit 3.4: Water Use Reduction-----------------------------------Pg 11

-Credit 3.5: Innovative Water Transmission----------------------Pg 12

4.0 Energy and Atmosphere----------------------------------------------------Pg 12

-Credit4.4: Optimize Energy Performance--------------------------Pg 14

-Credit 4.5: Renewable Energy------------------------------------------Pg 14


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- Credit 4.6: Additional Commissioning------------------------Pg 15

-Credit 4.4: Ozone Depletion-------------------------------------Pg 15

-Credit 4.5: Measurement and Verifications------------------Pg 15

5.0 Materials and Resources-----------------------------------------------Pg 16

-Credit 5.1: Building Reuse-----------------------------------------Pg 16

- Credit 5.2, 5.3: Construction Waste Management,-----------Pg 17

Resource Reuse & Recycling

- Credit 5.4: Recycled Content Used---------------------------------Pg 19

- Credit 5.5: Local/Regional Materials Used-----------------------Pg 19

-Credit 5.6: Rapidly Renewable Materials--------------------------Pg 19

6.0 Indoor Environmental Quality-------------------------------------------Pg 19

-Credit 6.1: Outdoor Air Delivery Monitoring-------------------Pg 20

-Credit 6.2: Increased Ventilation-----------------------------------Pg 20

-Credit 6.4: Low Emitting Materials---------------------------------Pg 20

-Credit 6.6: Controllability of Systems-------------------------------Pg 20

-Credit 6.7: Thermal Comfort, Design-------------------------------Pg 21

-Credit 6.8: Thermal Comfort, Verification--------------------------Pg 21

-Credit 6.9: Daylight & Views-------------------------------------------Pg 21

7.0 Innovation in Design---------------------------------------------------------Pg 21

8.0 Social and Cultural Awareness---------------------------------------------Pg 21

-Credit 8.1 Social Wellbeing, Public Health & Safety--------------Pg 21

Conclusion---------------------------------------------------------------------------Pg 22


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IntroductionOur Company ABS Consultants was hired by Mr. D.S.J. Hewavitharana of Leaf Holdings(Pvt)

Ltd., a tea Export Company,to build his new office building complex at Dematagoda,

Colombo. This building will not only serve its commercial purpose of an office space but it

also seeks to exemplify the standards of a Green Building in Sri Lanka. This report willanalyse the buildings features in terms of its cost, compliance to environmental standards

and design features which make it suitable to be rated according to the GREENSL

Ratingsystem.

Background

The site is located in the commercial side of Dematagoda, Colombo, and is accessed via

Baseline Road. It has a maximum rainfall of 400cm of rain per month, humidity levels which

can range from 70-90% and temperature that rises up to an average of 30C.

Building

The building is set to have 3 floors and 1 below shows the various functions of the building

at each level (Refer to Annexes for schematic drawings and project program).

Table 1. Building Functions

Ground Level 1. Reception Lounge & Public Area

2. Office Spaces

3. Conference Room

4. Miniature Auditorium

5.

Cafeteria

6. Recreation Lounge

7. Kitchen

8. Service Area

9. Washrooms

10.Engineering Workshop

11.Garbage Collecting Points

12.Open Parking Area

13.Vegetable & Fruit Plantations

14.Bioremediation Area

First Level 1.

Office Spaces

2. Office Area for Divisional Heads

3. Executive Area

4. Recreation Lounge

5. Services Area

6. Washrooms

Second Level 1. Office Spaces

2. Washrooms

3. Club House

4. Rain Water Harvesting Tanks

5.

Vegetated Roof Garden


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A BOQ done on the building showed the total approximate rate per m2

to beRs. 58,971.65/m2, a

summary is shown in Fig. 1 below (refer to Annexes for detailed BOQ).

Fig. 1 BOQ Summary


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Assessment of site using the GREENSL Rating Tool

The following analysis will describe the features of the building in accordance to the criteria

which are applicable to our building and site, in addition to the ones that need to be

addressed in the GREENSL

Rating tool system.

1.0ManagementPrerequisite 1: Green Building Accredited Professional

A Green Building Accredited Professional was commissioned for the project to work with the

team to achieve the required GREEN Standards.

Prerequisite 2: Commissioning Clauses

The following documents were submitted to the client to be used during the operation of

the building: Document of Design Intent

As-Built Drawings

Operations and Maintenance Manual

Building Management Staff Training Manual

Credit 1.1: Building Tuning

In order to ensure optimum Occupant Comfort and Energy Efficiency of the systems and

services of the building, a member of the design team would ensure a monthly monitoring

and a full recommissioning of the building 12months after practical completion. An

operational manager for the building was suggested to be appointed by the client; in order

to provide feedback and a review of the systems during the Building Tuning Period.

Credit 1.2: Building Users Guide

The following would be provided to the client to optimize the buildings environmental

performance during operation:

Energy and Environment Strategy

All Building Services Transport Facilities

Waste Disposal Policies

2.0 Sustainable Site

Prerequisite 1: Erosion and Sediment Control

The site is located on flat land thus the surface run-off of sediment leading to high erosion

rates remains low. An Erosion Prevention and Sediment Control Planwas prepared taking

into account erosion control methods such as minimizing disturbed areas, mulching (mulch

derived from waste wood during construction), by controlling the amount of soil that can


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run-off and by stabilizing exposed soil. Sediment that escapes the erosion control methods

will be trapped using silt fences around the property, especially to the canal.

Credit 2.1: Site Selection

As it was a previously developed industrial site within the commercial belt; all necessaryinfrastructure for development already exist.

Further, the existing dilapidated buildings have left behind a certain amount of

contamination on site and the new the development will ensure removal of the

contamination through a process explained in Credit 2.3.

The proposed new Green Building is designed to have no interference to any habitat, and

the site disruption is at its minimal due to its low footprint. Existing vegetation in addition to

the new, along with the natural canal and open space provide an excellent environment for

employees to work in a productive manner.

Credit 2.2: Development Density and Community Connectivity

All necessary infrastructure facilities of power, water supply and waste disposal are

available as it is a previously developed site. The area in the immediate vicinity is highly

dense with mainly housing for the low and middle income and commercial activity

containing planned industrial zones as well. However, green patches are still in abundance

within the area, which contributes to balance a fair Biodiversity.

Further, community facilities such as schools, hospitals, banks, groceries and supermarkets

are located close to the site. This connects the building and its users to the community and

its functions.

It is proposed that the maintenance of the building and all open areas will be carried out by

the local community;generating income and economic growth in the area.

Credit 2.3 Brownfield Redevelopment

The site has a minor local contamination which will be dealt with using bioremediation

strategies (Dzantor 1999). The main strategy which will be used is called phytoremediation

where native plants likeKohila(Trianthemadecandra), Kankung(Alternantherasessilis),

Habarala(Alocasiamacrorrhiza) and Mustard (Brassica juncea)will be planted on the

contaminated site and used to absorb the contaminants from the soil. These plants then will

have to replaced every six months, to ensure that the plants continue to remove the

contaminants from the soil (Somaratne and Weerakone 2012)

As contamination levels reduce, the area will be used as part of the garden for our office

building. This is cost effective and environmentally friendly way of redeveloping brownfield

sites for human use.


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Credit 2.4: Alternative Transportation

Public Transportation Access:

The area is close to public transport systems such as: ancillary roadways, pedestrian paths,

and the Dematagoda Railway Station. Thus we encourage users to adopt public transportinstead of personal vehicles to reduce carbon emissions on site.

Parking Capacity:

Ample Parking is provided within the site in order to accommodate not only the vehicles of

the proposed Green Building, but also the vehicles of the neighbouring occupants and for

commuters who travel from outstations; who can make use of our parking facilities. This

would generate revenue to the building and in turn reduce the disruption caused to the

atmosphere through carbon emissions.

Credit 2.5 Reduced Site Disturbance

As the site was a previously developed one the biodiversity of the area was severely

reduced, thus this building project will seek to rehabilitate the local area with native plant

species such asAloe vera , Dhaluk (EuphobiaAntiquorum) andBougainvillia(eg:

Bougainvillea spectabilis)

Credit 2.6 Storm Water Design, quantity control

The Existing building had 67% of its surfaces being impervious, which created a lot of stormwater run-off. Bringing it back to 50mm/hr (according to GREEN

SLRating Guide), required

the building of several step-like retaining walls; made up of a cement-soil mixture along the

bank of the canal. Furthermore, shrubs and trees planted on each step will trap storm water

run off, increase infiltration of water into the groundwater and reduce run-off into the

canal.

Design of Rain water Harvesting Tank (quantity control)

Rain falling on the proposed building will be collected through gutters and into a rainwater

harvesting tank. The collected water will be then used for landscaping and toilet flushing

purposes.

Rain Water Harvesting Quantity Calculation (BS 8515:2009):

1. 5% of Annual Rain water yield (YR)

YR = A x e x h x x 0.05

YR = 755 m2x (e x ) x 2500 mm x 0.05

YR = 755 x 0.80 x 2500 x 0.05

YR =75,500l

Collecting Area = A
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Yield Coefficient =e

Depth of Rainfall =h

Hydraulic filter efficiency =

2.

5% of Annual non potable water demand (DN)DN = PD x n x 365 x 0.05 + A x a

DN = (50 l x 350 x 365 + 716 m2x 60) x 0.05

DN = 321,523l

Daily Requirement per person =PD

Number of persons =n

Garden Area =A

Water Demand For Gardening =a

Therefore Rainwater Storage Capacity = 76,000 l

Credit 2.7 Storm Water Design, quality control

As not much waste water will be generated by an office complex and storm-water was run-

off was reduced considerable, it was not economical to have a storm-water treatment

system to improve water quality.

Credit 2.8: Heat Island Effect, Non-Roof

Comparatively, only a minimum foot print of built area is utilized for the building withnegligible impact on the microclimate. Every effort is made to enhance the healthy

livelihood of human and wildlife habitat.

Vegetated terraces are located on the top terrace level of the building and on the ground

level wherever possible.

Vegetables and Fruits are grown on the building so that their produce is utilized for the

consumption of the building occupants through the meals available at the in-house cafeteria

for a nominal cost. The vegetation thus not only provides organic food to the employees but

it also improves their immediate scenery at work.

Native trees are planted throughout the site wherever possible and the entire parking area

is shaded by trees.

A non-impervious mixture from the reuse of debris of the previously demolished building

was mixed with soil and utilized for all roadways, parking areas and pathways within the

site. This would enable maximum storm water absorption to the ground without an outflow.

The durability as well as the strength of this paving method is known to be very high as well

as cost effective with very little maintenance.


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Credit 2.9: Heat Island Effect, Roof

Solar panels have been installed on both pitches of the roof to its entire area to obtain solar

power enough for the energy functions of the building.

Roofing material has a SRI equal to or greater than the values as in Table 2

Table 2. SRI for different roof slopes

Roof Type Slope SRI

Low-Sloped Roof Slope 2: 12 78

Steep-Sloped Roof >2: 12 29

Source: GreenSL

Rating System for Built Environment Version 1.0

Credit 2.10: Light Pollution Reduction

All interior lighting circuits have been driven through a motion base sensor system which

ensures the automatic operation of the lighting circuits between 5am-10pm. However the

maximum allowed lighting power portion will be limited in accordance to the Table 2.1

Lighting Power of Code of Practice on Energy Efficient Buildings of Sri Lanka, published by

SEASL.

Exterior Lighting will be operated via automatic controls capable of switching off lights when

sufficient daylight is available or/and when the lighting is not required. Lighting

arrangements are in compliance with Table 9.4.5 of ASHRAE/IESNA standard 90.1-2004. The

Project was identified and categorized under LZ1 (Dark and Rural Setting) and the designs

were made accordingly.

3.0 Water Efficiency

Credit 3.1 Water Efficient Landscaping

Grass will not be planted in the garden space, and instead will have native shrubs likeAloe

Vera, Dhaluk (EuphobiaAntiquorum) andBougainvillia(eg:Bougainvillea Spectabilis), which

will not require a lot of water to be maintained. Mulch will be applied to the soil to prevent

excess evaporation of water from the soil.

Finally the water will be supplied to the plant using the drip irrigation method which in turn

will have water transmitted from the rainwater tank and grey water from kitchens.

Credit 3.2: Water Efficiency in Air Conditioning

Under average ambient conditions of a warm humid surrounding, a collection of 60 litres

water is assumed to be collected through the condensation process of Air Handling Units
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per day. The collected water will be stored in a tank on a level above the proposed Terrace

area.

Credit 3.3: Innovative Wastewater Technologies

The building will have two waste systems separating the black water from grey. The blackwater will be diverted into a septic tank on site while the grey water will be treated using

grease traps (Fig. 2)

Fig.1Representation of the process that occurs in the grease trap. Influent enters the inlet

pipe and is directed beneath the grease layer by the baffle. Within the grease trap that

grease is allowed to float to the top while sludge settles to the bottom. Water is allowed topass upwards into the outlet pipe toward the filter. The connection at the outlet pipe

prevents grease from exiting with the effluent.(source: Glassman et al 2009)

The sludge can be dried and used as manure for the plants in the garden.

The rainwater tank will be used to provide water for landscaping and flushing in toilets, thus

reducing the demand for portable water. The plants on the building will be watered using

the water generated from Air conditioning system.

Credit 3.4: Water Use Reduction

The two main uses of water identified in the building are for toilet purposes and cooking

purposes in the canteen. As it is not possible to reduce the amount of water used for

cooking, it was decided that the toilets be retrofitted with gravity-fed low flow toilets, which

have a half or full flush option fitted into them (Rodriguez 2012).

Rainwater from the entire roof area is collected to rain water harvesting tanks which are

located on the 2nd

level of the building. They are then distributed to the use of the building

functions such as toilet flushing and landscaping purposes.


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The storm water which falls on to ground is absorbed through its non-impervious mixture

used on the paved areas as described in Credit 2.8: Heat Island Effect, Non-Roof. The rest of

the storm water will be diverted to for landscaping purposes.

Credit 3.5: Innovative Water Transmission

The water tanks will be placed on the second level, with very little use of the pumps will be

and instead gravity will be used as an effective means of transferring water from the tank to

the sites where it would be needed. Our solar panels will provide the additional energy

required by the pumps.

4.0 Energy and Atmosphere

Prerequisite 1: Fundamental Building System Commissioning

In order to verify the design, installation and calibration of fundamental building elements, a

Commissioning Report was submitted to a third party commissioning team after following

all the procedures as intended by the GREEN Rating system. The development and

utilization of the commissioning plan, verifications of installation, functional performance,

training, operation and maintenance documentation were carried out in prior to the

creation of the report.

Prerequisite 2: Minimum Energy Performance

The Design of the building project complies with both mandatory provisions ofASHRAE/IESNA standard 90.1-2004, section 5.4, 6.4, 7.4, 8.4, 9.4, 10.4 and section 11 of

performance requirement.

The project also complies with the final version of Code of Practice on Energy Efficient

Buildings of Sri Lanka, published by SEASL.

The insulation of the building envelop, fenestration, doors and the air leakages of the

building have been built with reference to the ASHRAE/IESNA standard 90.1-2004, section

5.4,. Necessary precautions have been taken by the initial design to fulfil the requirements

found in 5.8.1.1- 5.8.1.9.

U-values for roofs, fenestrations and facades for determining the corresponding OTTVi

values were determined from data in Appendix 4 of the Code of Practice on Energy Efficient

Buildings of Sri Lanka. Furthermore the publication fenestrations and doors have been made

to limit air leakage, with air infiltration not exceeding 2 litres/s/m2.

Vestibules which separate conditioned spaces from the exterior shall be protected with self-

closing devices and designed with a minimum distance between them being no less than 7ft

when closed.


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Equipment Efficiencies, Verification, Labelling, Load Calculation Controls and HVAC System

Construction & Insulation were made in accordance with section 6.4 of ASHRAE/IESNA

Standard 90.1-2004. Minimum Equipment Efficiencies at non-standard conditions were

designed to meet the minimum full-load COP and IPLV/NPLV in Table 6.8.1H. This would

leavethe Chiller water temperature to be maintained at 40F to 48F and the Condenserwater temperature to be around 75F to 85F.

As per SEASL, the indoor conditions of the air-conditioned space was designed for a dry bulb

temperature of 25 C 1.5 C and relative humidity of 55 % 5 %. The combination of

suitable high temperatures and humidity are suitable for both at the comfort zone as well as

for energy saving purposes; provided the conditions maintained herein are agreeable to the

occupants.

Each conditioned zone will be individually controlled by thermostat controls and the pre-set

temperatures will assure the occupants comfort within the zone. The Dead Band of the

zones thermostatic controls shall be within 5F after which the supply of cooling energy to

the zone is shut off or reduced to a minimum.

A centralized automation system (BMS) ensures the functionality of after-hour controls and

automatic shutdown under different time schedules. Furthermore the system ensures

setback controls and optimum start controls while maintaining zone temperatures below

the pre-determined set points which are user adjustable.

Appropriate air conditioning zoning has been introduced as per the standards and are

intended to operate non-simultaneously once divided into isolated areas of their own.

Zones may be grouped into a single isolation area provided it does not exceed 25,000 ft2 of

conditioned floor area nor include more than one floor.

As per the section 8.4 Voltage Drop across the Feeders were sized for a maximum voltage

drop of 2% at design load and 3%maximum for the Branch Circuits. LDP will not exceed 10.8

w/m2

as per the Energy Code of SEASL.

Section 9.4 of ASHRAErefers to the lighting control, exit signs, interior and exterior building

lights. An automatic control has been introduced by the initial design to on the basis ofoperating occupant sensors that shall turn lighting off within 30 minutes of an occupant

leaving a space. As per the Energy Code of SEASL, occupancy based controls strategies are

best suited to spaces that have highly variable and unpredictable occupancy patterns. At

least one control device has been introduced to independently control the general lighting

within the space. Each and every device shall be readily accessible while LDP will not exceed

10.8 w/m2

as per the Code of Practice on Energy Efficient Buildings of Sri Lanka.

Exterior Lighting is also on the basis of automatic controls capable of switching off when

sufficient daylight is available or/and when the lighting is not required.


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While designing Exterior Building Grounds Lighting, all exterior building grounds luminaires

that operate at greater than 100watts designed to have a minimum efficacy of 60 lm/W

while fulfilling the requirement of Table 9.4.5 of ASHRAE/IESNA standard 90.1-2004. .

The building has used the most efficient luminaires/fixtures available in the market

according to the manufacturer information section of the fixture application. The efficiency

of a lighting fixture is given by its light output ratio (LOR) which is defined as the ratio of the

lumens from the luminaire to the sum of the individual lumen values of the lamps inside the

luminaries(Energy Code of SEASL)

As per the Mandatory Provisions of section 10.4 Electric Motors will comply with the

requirements of the Energy Policy Act of 1992, Table 10.8.

Prerequisite 3: CFC Reduction in HVAC & R Equipment

The HVAC equipment which caters to the total cooling demand of the building incorporates

the latest standards and CFC-free operation and thus does not deplete ozone layer.

Credit 4.1 Optimize Energy Performance

The Buildings Energy Simulation demonstrates that Option 1 to be in compliance with

Prerequisite 2. The buildings baseline energy performance was calculated as per the

ASHRAE/IESNA standard 90.1-2004 Appendix G and it complied with the final version of the

code of practice on Energy Efficient Buildings published by SLSEA. The energy process cost is

no less than 25% (about 33%) of the buildings baseline energy cost. According to thecalculations; the new building achieved the minimum energy cost savings of 27.5% and the

design of the project complies with the mandatory provisions in Standard 90.1-2004 of

ASHRAE.

Credit 4.2: Renewable Energy

Solar wasused as the potential source of renewable energy and it would cover an area of

330 m2. The entire panel is located at the North-South orientation with a maximum 12

0

angle to the South. Table 3 shows calculation made on the buildings renewable energy

output and savings. In addition to this a series of net-metering strategies put in place to

monitor the monthly energy usage of the building.

Table 3. Renewable energy generated onsite and savings in energy costs achieved.

Peak energy output

(kWh/month)

Total energy usage

of building (kWh)

Savings per month

(%)

5418 39320 13.77


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Credit 4.3: Additional Commissioning

A detailed review of the design was carried up prior to the construction phase and further

review of construction documents will be implemented close to completion. A selective

analysis of the contractor submittals for commissioned equipment wasdone by a third party

agent.

The Commissioning Agent will prepare and submit a re-commissioning management manual

and review the project close to the end of the warranty. The Commissioning Process of the

ASHRAE GUIIDE LINE will be referred to and used as a supporting document.The

information and instructions, published in the Table D-1, Documentation Matrix of the

above publication was also referred to.

Credit 4.4:Ozone Depletion

The Chiller operates with 'near zero' emissions refrigerant while using recently developed

HCFC as the refrigerant which has very low ozone depleting potential.

Chiller includes improved gasket materials and minimizes the use of threaded fittings. The

low-pressure chiller design ensures that air will typically leak into the machine instead of

refrigerant leaking out. The new purge systemson offer in these Chillers release less

refrigerant per pound of air. The use of integrated microprocessor-based controls enable

the monitoring of purge operation leaks, plus monitoring of equipment room refrigerant

concentrations up to one part per million.

Finally the fire suppression system of the building does not contain HCFC or Halons which

have ozone depletion potentials.

Credit 4.5: Measurement and Verifications

M & V plan of the designed project is developed with reference to the International

Performance Measurement & Verification Protocol Volume III.

Documentation and specification of the baseline including a listing of all important

assumptions and supporting documents were prepared.

A dedicated person was appointed to implement the M&V plan for the projected time

duration of time over which Quality Assurance procedures need to be reported on.

The calculation of the building base load was important. Therefore, option C of Table 1, and

Overview of New Construction M&V Options of the volume III were used to identify

buildings similar to ours so we can use their values of; projected baseline energy use, data

on building function, location and operation to calculate our own values.


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The equation below was used to determine the energy savings of the building and the well-

equipped sub metering program was followed thereafter to calculate the building energy

usage in operation.

Energy Savings = Projected Baseline Energy Use - Post-Construction Energy Use

5.0 Materials and Resources

The increasing scarcity of resources and the high and fluctuating prices of raw materials can

lead to major economic and social dislocation in every country on earth; increasing material

and resource efficiencies can limit all these problems.

Waste management during all stages of demolition, construction and operation play a very

important role in effective usage of materials and resources. The following options

demonstrate an efficient technique of the waste management process:1. Reduce (Prevention of waste generation)

2. Reuse (Reuse of reusable materials)

3. Recycle

4. Recovery

Prerequisite 1:Storage & Collection of Recyclables

An effective waste management plan was required due to high waste generation of the

building during its operational stage. The following actions will be implemented as part of

the waste management strategy:1) Training and education of staff on reuse strategies.

(Ex. Use both sides of paper, Use Reusable Plastic case for Foods and

Beveragesetc.)

2) Each staff member will be responsible for ensuring that the waste they generate is

disposed into the correct bin:

Paper & Cardboards - sent off to be recycled

Plastics - Recycled Locally (For ease of recycling, different type of

plastic resin need to be kept separate)

Compost {Foods} - Should be composted on site and will be a source of fertilizer

for the plants.

3) Maintain garbage collection and transport services from all parts of the building.

4) All waste (other than compost) will be collected by theColombo Municipal Council

(or via a private contractor) from garbage room.

Credit 5.1: Building Reuse

The existing buildings were in a poor state of repair and were slated for demolition.


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Credit 5.2, 5.3: Construction Waste Management, Resource Reuse & Recycling

Credit 5.2: Recycle and / or salvage - 85% (by weight)

Credit 5.3: Resource Reuse - 12%

Preliminary Demolition Plan (Material & Resource management)

The Preliminary Demolition Plan will be used to ensure that demolition activities on site do

not adversely affect the health, safety, traffic or the environment of public and neighbouring

properties.

Demolition methods

The strip out and removal of non-structural elements will be undertaken utilizing manual

labour and small plantswhich include bobcats and excavators.

During the demolition process erosion control measures will be established. These will

include treatment of dust and management of discharge into storm water systems.Material handling

On-site storage of reusable materials will occur at the northern boundary of the land.

Recycling and disposal containers will also be accommodated at a separate location at the

northern boundary of the land to be collected by collection vehicles.

Hazardous materials will be treated separately.A hazardous materials inspection will be

undertaken by an accredited consultant and removed in accordance with standards.

A preliminary assessment of the existing building showed the resources which can be

reused, recycled or disposed of in an appropriate manner (Table 4).

Table 4. Resources which can recycled, reused or disposed of in a safe manner

Resource Resource

Reuse (%)

Waste

Reuse (%)

Description

Clay Burnt Bricks 30 70 30% of Clay Burnt Bricks can

be taken as undivided and

uncrushed bricks during

proper demolition and

reused in walls. (Credit 5.3)

The remaining divided and

crushed bricks can be used

for landscaping, preparation

of access roads and parking

areas. (Credit 5.2)

Crushed Concrete Debris

0 100 100% Concrete debris reused

for base preparation on

roads, ground floor and for

cement blocks made onsite.


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(Credit 5.3)

Structural Steel Sections

(UB)

60 (recycled) 40 (sold to

as scrap to

be recycled)

80% of the existing roof

structure (by weight) consists

of universal beam sections,hence 75% of it can be

reused as roof trusses for

new building with minor

modifications in place (i.e.

sand blasting with the

application of a Zinc

Phosphate primer). (Credit

5.3)

The remaining 20% of steel

debris will be sold as scrap

metal to be recycled. (Credit

5.2)

Roofing Materials 0 0 Existing roof structure

consists of old (>5 years old)

asbestos roof sheets and

these sheets are categorized

as hazardous. Thus careful

removal and disposal to

government approved

disposal sites will be

required. (Credit 5.2)

Glass Wool, Electronic

waste

0 0 Categorized as a hazardous

and disposal to government

approved disposal sites will

be required. (Credit 5.2)

Glass, Paper, Timber,

etc

0 100

(recycle)

All recycling items like glass,

paper and timber, etc need

to be collected separately

and sold to recycling

companies. (Credit 5.2)

Construction Plan (Material & Resource management)

Waste generation during construction is relatively low when compared to the operational

stage of the building. Moreover properly trained and experienced site staff along with

proper construction techniques can be used to minimize the waste generated onsite duringconstruction. Apart from these factors the most common construction wastes come


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fromreinforcement off-cuts, cement bags, wooden parts from formwork, excessive

foodsetc.; all of which can be recycled or got rid of in a cost-effective manner.

Credit 5.4: Recycled Content Used - 25%

The following recycled materials will be used in the new building to reduce the demand forvirgin materials.

1. Recycled Reinforcement

2. Recycled Polythene

3. Reuse/Recycled cement blocks with concrete debris

4. Soil Blocks

Credit 5.5: Local/Regional Materials Used- 25%

The following materials will be sourced locally:

1.

Concrete with locally made cement2. Locally made Paint and other accessories

3. Locally made tiles for floor finish

4. Locally made asbestos for Roof

5. Locally made Recycled Polythene

6. Recycled cement blocks made onsite and locally made soil blocks.

7. Recycled Reinforcement made locally

Credit 5.6: Rapidly Renewable Materials

Dura Panels were used for all internal, non load bearing partition walls. Dura is made out of

Paddy Straw Fibres and the process produced no toxic waste, volatile organic compounds

and it does not contain any formaldehyde.

6.0 Indoor Environmental Quality

Prerequisite 1: Minimum IQA Performance

Special eatables in ventilation system controls, stair and shaft vents shall be equipped with

motorized dampers that are operated according to the needs of the fire and smokedetection systems and monitored through the BMS. All outdoor air supply and exhaust

hoods will automatically control and shut-off the outdoor air supply. Once the preoccupancy

building warm-up, cool down and setback reach the outdoor air supply level and exhaust air

dampers benchmark specified by Section 6.4.3.4 of ASHRAE; the exhaust and ventilation

systems that are equipped with motorized dampers will automatically shut down. The

maximum leakage rate will be as indicated in Table 6.4.3.4.4. of ASHRAE.

Ventilation controls shall be in compliance with ASHRAE Standard 62 and Energy Code of

SEA. Friction losses and pressure drops across the system will be no less than the specified

levels in the Local Energy Code.


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Under HVAC System Construction and Insulation, insulation of all supply and return ducts

installed as part of an HVAC air distribution system shall be thermally insulated in

accordance with Tables 6.8.2A and 6.8.2B.of ASHRAE/IESNA standard 90.1-2004.

Precautions for the leakages of relevant air ducts were taken and the Lmax was assured to

be maintained below the specified level.

Prerequisite 2: Smoke (ETS) Control:

Company policy prevents smoking inside the building; however occupants are welcome to

smoke at designated areas outside the building.

Credit 6.1: Outdoor Air Delivery Monitoring

In order to maintain building occupants comfort and wellbeing, a CO2 monitoring system is

installed for the Mechanically Ventilated areas of the building.

Credit 6.2: Increased Ventilation

Most areas of the building are naturally ventilated except for the work spaces which have

provision for air conditioningwhen ever required. This ensures low operational costs in the

building while maintaining healthy living standards.

All lobby areas, passageways, links, cafeteria, kitchen area, and washrooms are 100%

naturally ventilated.

Credit 6.4: Low Emitting Materials

Paints and Coatings:

All Paints and Coatings to be used are Lead free, preventing the release of toxins into the

environment.

Carpet System:

There will not be any carpets used in any area of the building as carpets are known to be

dust collectors as well as having high maintenance and replacement costs.

Credit 6.6: Controllability of Systems

6.6.1: Lighting Controls

Office area lighting design was completed on the basis of each and every light fixture being

readily accessiblethrough at least one control device. Individual lighting controls for

minimum of 90% of the occupants will have their own adjustment controls for their

individual tasks as well as group needs.

Credit 6.6.2 :Comfort Controls

With reference to Section 5.1 (Location and Size of Openings) of ASHRAE Standard 62.1-

2004; naturally ventilated spaces shall be permanently open to and within 8m of operable


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wall or roof openings. Open spaces constitute a minimum of 4%of the net occupiable floor

area.

Operable openings will be readily accessible to building occupants whenever the space is

required, as specified by Section 5.1.2 (Control and Accessibility) of ASHRAE Standards.

The comfort controls for the building were assessed taking in consideration Section 5.4 (six

primary factors of thermal comfort) of ASHRAE Standards.

Credit 6.7: Thermal Comfort, Design

A sensitive and thoughtful building design envelop is created for the satisfaction, wellbeing

and maximum productivity of the occupants. The thermal comfort conditions for human

occupancy were designed to keep all running and operational costs to a minimal. The design

meets with the ASHRAE Standard 55-2004.

Credit 6.8: Thermal Comfort, Verification

A Thermal Comfort survey is suggested to be conducted 6-18 months after occupancy, to

ascertain the levels of satisfaction of the occupants.

Credit 6.9: Daylight & Views

The entirety of the building obtains 100% natural lighting, reducing the consumption of

electricity and bringing down building operation costs. However, provision has been made

for artificial lighting in all areas of the building during days and instances of reduced natural

light as well as for building functions at night.

The building sits in a picturesque location facing a water body with abundant fauna and

flora. Therefore the structure is designed in a manner that obtains maximum views of the

outsideenvironment. This facility is encouraged even on the upper levels of the building,

personifying the interior of the building with the natural beauty of the outside environment

7.0 Innovation in Design

An exemplary performance is suggested to be attempted on this building in future, once theGREEN

SLrating has been awarded.

8.0 Social and Cultural Awareness

Prerequisite 1: Archaeological Sites and Heritage Buildings

There are no Archaeological Sites and Heritage Buildingsin the vicinity of the site.

Credit 8.1: Social Wellbeing, Public Health & Safety

The quality of life, health and wellbeing is encouraged of the occupants through the self-sustaining aspects of the building complex. The structure invites natural wind, ventilation


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and plenty of sunlight to ensure that occupants inhabit a more comfortable and natural

space. Social interaction is also encouraged in the public open spaces, increasing the social

connectivity of the area.

The building occupants consume the healthiest fresh fruits and vegetables grown within the

complex; and enjoy walks and physical exercise along the canal and in the beautiful

landscapes we have created around the building.

The building is designed as per safety standards and guidelines set out by the UDA and CMC.

It is also safe for differently abled persons as well.

Conclusion

On analysis of the building according to the GREENSL

Rating system, it was possible to make

an approximate calculation of the total amount of credits the building qualifies for. Table 5

shows a summary of the credits.

Table 5: summary of credits scored by the new building on site

Credit Point attributed to credit

1.1 Building Tuning 1

1.2 Building Users Guide 1

2.1 Site Selection 1

2.2 Development Density and Community

Connectivity

4

2.3 Brownfield Redevelopment 1

2.4 Alternative Transportation 3

2.5 Reduced Site Disturbance 4

2.6 Storm Water Design, Quantity Control 3

2.8 Heat Island Effect, Non-Roof 1

2.9 Heat Island Effect, Roof 1

2.10 Light Pollution Reduction 1

3.1 Water Efficient Landscaping 4

3.2 Water Efficiency in Air-conditioning

system

1


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3.3 Innovative Wastewater Technologies 4

3.4 Water Use Reduction 3

3.5 Innovative Water Transmission 1

4.1 Optimize Energy Performance

4.2 Renewable Energy 7

4.3 Additional Commissioning 1

4.4 Ozone Depletion 1

4.5 Measurement and Verifications 1

5.2 Construction Waste Management 2

5.3 Resource Reuse 2

5.4 Recycled Content 2

5.5 Local/Regional Materials 3

5.6 Rapidly Renewable Materials 1

6.1 Outdoor Air Delivery Monitoring 1

6.2 Increased Ventilation 1

6.4 Low Emitting Materials 3

6.6 Controllability of Systems 2

6.7 Thermal Comfort, Design 1

6.8 Thermal Comfort, Verification 1

6.9 Daylight and Views 2

8.1 Social Wellbeing, Public Health and

Safety

1

Total number of Credits 66

According to the above score sheet, one expects to qualify for a Gold Star GREENSL

Rating.


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References

American Society of Heating, Refrigerating and Air-Conditioning Engineers,

2004,ANSI/ASHRAE Standard 55-2004 Ventilation for Acceptable Indoor Air Quality, Atlanta:

ASHRAE.

American Society of Heating, Refrigerating and Air-Conditioning Engineers, 2004,

ANSI/ASHRAE Standard 90.1-2004 Ventilation for Acceptable Indoor Air Quality, Atlanta:

ASHRAE.


2005,ASHRAEGuideline 0-2005 The Commissioning Process, Atlanta: ASHRAE.


2007,ANSI/ASHRAE Standard 62.1-2007 Ventilation for Acceptable Indoor Air Quality,

Atlanta: ASHRAE.

Dzantor, E.K., 1999, Bioremediation of Contaminated Soils: What It Is and How To Do It,

Maryland Cooperative Extension, Fact Sheet 757, University of Maryland, College Park,

Maryland.

Glassman, J., Kanegawa, B., Lee, D., and Martinez, A., 2009, Grey Water Systems, Engineers

for a Sustainable World, Stanford University, California

GREEN Building Council Sri Lanka, 2012, GREENSL

Rating System For Built Environment

Version 1.0, Green Building Council Sri Lanka, Nugegoda, Sri Lanka

International Performance Measurement and Verification Protocol (IPMVP), 2003, Concepts

and options for determining energy savings in new construction, Vol. 3.

Rodriguez, J, 2012, Low-Flow Fixtures, Available at:

http://construction.about.com/od/Green/a/Low-Flow-Fixtures.htm, Accessed on the 28th

of

September 2012.

Somaratne, S and Weerakoon, S.R., 2012, A Comprehensive Study on Phytoextractive

Potential of Sri Lankan Mustard (Brassica Juncea (L.) Czern.&Coss) Genotypes, WorldAcademy of Science, Engineering and Technology, Vol 61, pp. 1266-1270

Sri Lanka Sustainable Energy Authority, 2009,Code of practice for energy efficient buildings

in Sri Lanka, Colombo: Design Systems.
http://construction.about.com/od/Green/a/Low-Flow-Fixtures.htmhttp://construction.about.com/od/Green/a/Low-Flow-Fixtures.htmhttp://construction.about.com/od/Green/a/Low-Flow-Fixtures.htm


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Annexes

assignment-green building-case study

Documents