25-01-10 networking event ems final

8/11/2019 25-01-10 Networking Event EMS Final

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www.ems-int.com

Networking EventMonday 25 Jan 10; Address Hotel, Dubai Marina

District Cooling Plants;

Comparison with Conventional Systems

Harris SanooEnergy Management Services Int.


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Window Air conditioning

District Cooling Plants

Conventional Coolingsystems

Window Air Conditioners

Split (DX) Air Conditioners

Packaged Units

Air Cooled Chiller System

Water Cooled Chiller System


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District Cooling Plant system


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Air Conditioning Schematic Diagram

Ac equipment is a Heat Pump.

Pumping heat from SPACE to AMBIENT for cooling

ROOM@22degC

AMBIENT@46degC


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Conventional Systems- Types

Cooling Requirement System Type

Small Buildings, Rooms

Low Cost

Window ACs

Small Building less than 300Tons to 500 Tons Split (DX) system

Ware house, Villas, Low rise

buildings

Packaged DX Units

Large Buildings up to 1,500

Tons

Air cooled Chillers

Large Buildings above 1,500

Tons

Water cooled Chillers

The following systems are popular in the region

Average Cooling Density = 250 Sq Ft / Ton


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Window Air conditioning

Every room, window ACs to be installed


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Split (DX) Units Airconditioning

One indoor unit & one outdoor unit required. Ducting is possible


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Package Unit

Packaged unit installed on roof and

no equipment in indoor; only ducts todistribute air


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Air cooled Chiller system

Few Air Cooled Chillers will be

installed outdoor on the roof or inthe chiller yard.

Many indoor units ( Air Handling

Units or Fan Coil Units) needed with

ducts to distribute air


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Water cooled Chiller system

Central water cooled chillers are

installed in plant room; normally inthe basement levels and CoolingTowers on the roof.


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District cooling System


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District Cooling Chilled Water Piping Network


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District cooling Plant Network


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DCP Connections


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Cooling System Selection

Initiial Cost

MaintenanceCost

EnergyCost

Cooling System- Life Cycle Costs for 20 Years

Cooling system to be designed and selected based on Energy Efficiency


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Energy Calculations- Basics

Constant Loads such as lights, Pumps, Motorsetc

Energy (kW Hrs) = Power (kW) * Time (Hrs)

Variable Loads such as Air Conditioners, VSD pumpsetc

Power (kW) is not constant and fluctuates with ambient

conditions for AC


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Annual Energy Consumption, Month wise.

0

5

10

15

20

25

30

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

ElectricalIntensityin

kwhr/sq

.m

Electrical Intensity for typical Buildings

HVAC Lighting & S.P Total

HVAC consumption is not constant and it depend on weather.

Typical Energy Consumption of a Shopping Mall in Dubai


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10

15

20

25

30

35

40

45

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

DEGREE(C

)

MONTHS OF THE YEAR

DUBAI INTERNATIONAL AIRPORT

MEAN MAX/MIN TEMPERATURE2008

Monthly mean max

Monthly mean min

Long Term mean max

Long Term mean min


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Air Conditioning Equipments Energy Calculations

Standard Calculation Methods are

1. Degree Day Method

Each day is represented by a number, which shows how much hot or

cold the month is - Less accurate

2. Bin Hour Method

The temperature of each hour is tabulated in a range of

temperatures - Medium accuracy

3. Software Simulation

Calculation performed hourly basis. More accurate. Eg :- DOE


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Air cooled Vs Water cooled chiller plants

Air cooled chiller plant require only electricity as input and

normally, the efficiency is 2 kW/Ton.

Water cooled chiller plant require both electricity and

water as input and the efficiency is 1.1 kW/ton.

Here the Cooling plant can not be compared in terms of

efficiency, but it require to be analyzed based on its

operating costs (Energy Costs) including water and

electricity.


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Units of Cooling Efficiency

Cooling capacity is expressed in

Tons of Refrigeration

kW of Cooling

Energy Efficiency of cooling plant is expressed in the following terms

kW/TonCoP Coefficient of Performance (Output kW / Input kW)

EER Energy Efficient Ratio

Most of the Energy Calculations use kW/Ton and popular in the region


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DCP Tariff

Normally, DCP provider will charge the user with the following

1. Consumption Charge

Pay as per the AC consumption.

Metered by Energy (Btu) Meters.

Unit is AED / RT-Hour

Monthly Energy Charges = Usage (RT Hr) x Agreed Energy rate($/RT Hr)

2. Demand Charges

Pay for the contracted capacity (Peak load)equipment cost

Monthly Demand Charges = Declared Demand (RT) x Agreed Demandrate ($/RT/month)


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Comparison- DCP Vs Conventional

District Cooling Conventional SystemElectrical Connected load is less Electrical Connected load required

for Plant Equipment

AC Plant equipment cost is not

required. Connection charge to be

paid to DCP Provider

AC Plant equipment cost is required.

Indoor equipments required Indoor equipments required

No need to pay Energy cost for the

plant. Usage charge to be paid

Plant energy cost to be paid as utility

charges.

No need of maintenance cost for

Plant equipments. Included in Usagecharges

Maintenance cost is required for

Plant equipment

Space is not required for Plant Chiller plant space is required

Good for high development density Good for Low development density


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DCP Sustainability Issues

Item Sustainability Issue

Refrigerant Addressed in LEED points

Energy

Consumption

It depends on DCP Technology. It will be same if

DCP employ similar technology

Adaptation of NewTechnology As the Plant is centralized, it will be easier toincorporate new technologies (Renewable)

Economies of

Scale

The cooling demand is met collectively there by

reducing the production cost

Capacity Utilization Normalizing Peak Loads


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District cooling Benefits


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District cooling Benefits

Exhaust

Piping


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Sample Savings Comparison


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integrated service offering across the energy efficiency spectrum

Green Solutions

Smart Property Solutions

Gas Solutions

Water Management

Renewable Energy

Clean Development

Mechanism (CDM)

Power Solutions

National Energy

Management Program

Click Menu To Navigate

In order to Navigate using

buttons you must have Office2007

Green Building Certification

Depth and Breadth

EMS Type of Services


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Green Solutions

A systematic procedure directed towards in-depth analysis of the functions of

systems, processes and building equipment .

It includes the following services :

Verification of the Utilities requirement in Master Planning stage

Feasibility Study on Ownership of District Cooling Plant

Design Guidelines and development of LEED certification

Carbon Credits Program

Energy Value Analysis of MEP designs

Consultation on Energy Matters during Construction Stage

Consultation on Commissioning of Energy Related Equipment

Back To The Menu


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Client Name

Project

Built Up Area

Scope of

Services

REEM INVESTMENTS

Najmat Abu Dhabi

80.0 million square feet

Verifying cooling loads

Initial feasibility study to establish a district

cooling plant

Verification of the Cooling Plant Capacity

DCP C i F ibili S d


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DCP Connection Feasibility Study

Client Name

Project

Built Up

Area

Scope of

Services

NORR Consultant

Shangri-la Hotel (Two towers residential

and hotel development )

N/A

Comparative study District Cooling vs. Stand alone

system

Case Study :


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Client Name

Project

Built Up Area

Scope ofServices

UNION PROPERTIES PJSC

Green community phase 2

Auto mall showroom and offices for Motor City

Uptown Development 1 & 2

13.0 million square feet

Case Study :

Green Solutions

Reviewing concept design, material submittals, equipment

and construction techniques

Estimating and comparing energy use for various system

design choices Modeling of the building energy system

Introducing energy control and management systems

Design guidelines and development of LEED certification


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Energy-Saving Opportunities and Design Sequence


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Benefits Smart Properties System

Smart Properties System for Existing Facilities

12% to 35 % savings of total annual energy costs for existing facility,

Detailed Energy Audits with energy balance studies, whereby the facility will

be divided into areas/ systems/ sectors. Each area will have its benchmarkconsumption and estimated saving potential,

Environmentally friendly, improved efficiency and less maintenance

Control Command Center (CCC),

New Source of revenues with 25% annual return, Replacement of inefficient equipment with new energy labeled equipment.


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all existing buildings are remotely connected to a centralized command

unit to monitor, control and report

Specialized Smart Property System will help the FacilityManagers /Chief Engineer to monitor, control and report


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www.ems-int.com

United Arab Emirates

Liberty Bldg. Office 303

Al Garhoud, Dubai, U.A.E

P.O. Box 31411

Tel No. +971 4 282 7000Fax No. + 971 4 282 7001

[email protected]

Saudi Arabia Office

Olayan Finance Company Office

Riyadh, Kingdom of Saudi ArabiaTel No +966 5060967

[email protected]

Jordan Office

P.O. Box 2457,

Amman 11953,Jordan

Tel No. +962 6 5538085

Fax No. + 962 6 [email protected]

Qatar & Bahrain Office

P.O. Box 26262,

Doha, State of Qatar

Tel No. +974 441 1522

Fax No. + 974 441 1577

[email protected]
mailto:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]


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Thank You

We will be pleased to

answer any of your

questions!!

www.ems-int.com

25-01-10 networking event ems final

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