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• TEXT size no small than 28 Arial

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The A-B-C of JV3 A Practitioner’s Approach

HEADING size 54 Arial

• TEXT size no small than 28 Arial

SUB-HEADING size 44 Arial

The A-B-C of JV3 Introduction

Section J - DTS of the Gold Coast University Hospital + part of the energy modelling team

DTS vs JV3 Let’s compare the basic intent

Deemed-to-Satisfy

OBJECTIVE To reduce Green House Gas

Emissions

TARGET PROJECTS Simple constructions with simple

architecture

Alternative Method JV3

OBJECTIVE To reduce Green House Gas

Emissions

TARGET PROJECTS Everything else

Any project aiming for predictive energy use

DTS vs JV3 The A – B – C pathway of doing an assessment

A – Architecture B – Building Services

C – Compliance

DTS vs JV3 Comparing the Method of Assessment

A – Architecture B – Building Services C – Compliance

JV3 Alternative Solution – using energy modelling to verify

performance

JV3

Project pathway (phases) PI

SD

DD

CD

CA

JV3 • Steps 1 to 6

– The first 6 steps in DTS and JV3 are the same • Steps 1 to 3 are completed during the PI phase, thus

before any of the design work has commenced

JV3 • Step 4

• Step 4 occurs at SD phase of the project – NO LATER!

• Step 4 helps the entire design team understand the impacts and issues

– Determine the building envelope – Determine the approximate minimum insulation values of

walls, floors, ceilings and roofs – Determine if required insulation thickness will impact on

internal space allocation of the design – Do the preliminary glazing calculations to see if there are any

issues

A

JV3 • Step 5

• Step 5 occurs at DD phase of the project – NO LATER!

• Step 5 helps the entire design team understand the impacts and issues

– Determine if all air-conditioned zones are identified – Determine if any insulation issues with pipework and

ductwork may be a co-ordination problem, especially in ceiling spaces

– This is generally advice provided by the Mechanical Engineer

NOTE: On small projects the Mechanical contractor may not have this capability

B

JV3 • Step 6

• Step 6 occurs at CD phase of the project – NO LATER!

• Step 6 helps the entire design team understand the impacts and issues

– Check if any clauses or requirements have been missed in the design

– This includes items like control of air-conditioning for zones near operable windows and doors to outside

– Identifying where Hydraulic, Electrical, Mechanical and Architectural design requirements interact and may result in reduced energy efficiency, such as roof penetrations

B

JV3 • Step 7

• Step 7 occurs at CD phase of the project – NO LATER!

• Step 7 is the construction of the baseline model – At this stage it is in the hands of the modeller and their skill in

representing the building within the software used – Use of the appropriate Specification JV protocols and data

should be included in all reporting – A verifiable model can be built by another JV3 energy

modeller in the same or different software package and get a similar baseline result, if all information is provided in the report.

B

JV3 • Step 8

• Step 8 occurs at the end of CD phase of the project – NO LATER!

– At this stage of the project major design changes should be avoided

– Advice give by the assessor during the previous phases of the project should mean no surprises – i.e. additional shading required, changes to the glass

– This stage should be purely about verification of the prior design advice

– The proposed model must model the actual design and if the building is built to the design the energy performance value here should be within 10% of the actual building energy use

B

JV3 • Step 9

• Step 9 occurs early in Phase D of the project – NO LATER!

C Building Baseline Baseline Proposed Services Baseline Proposed Proposed MWh MWh MWh Lighting 1.5222 1.5222 1.5222 Equipment 1.4642 1.4642 1.4642 Heating, cooling, and Ventilation - packaged unit 2.4568 2.4568 2.2892 Lifts 0 0 0 Hot Water 1.3705 1.3705 1.3705 Total - MWh 6.8137 6.8137 6.6461 Conversion to MJ - factor 3.6 3.6 3.6 Total MJ 24.52932 24.52932 23.92596 Conversion to Kg CO2/yr - factor 0.0548 0.0548 0.0548

Kg CO2/yr 1.344 1.344 1.311 Assessed area (m2) 60 60 60 kWh/m2 114 114 111

The Comparison table

JV3 • Step 10

• The Report • Following is a detailed outline of what is in a

comprehensive JV3 report • As the report is to demonstrate compliance with

legislative requirements – it must be a signed document

C

Prepared By

Ken Thomson

Signature

JV3 - Report Executive summary and introduction

• Executive Summary – This report is provided as an assessment for compliance in

accordance with the National Construction Code - BCA Volume 1, Section J energy efficiency requirements for the project.

– The intent of the BCA Section J is to reduce Green House Gas emissions. This report provides an assessment of the building in accordance with this intent.

– The assessment of this project for compliance with the BCA section J is done in accordance with the current guidelines and protocols as provided by the Australian Building Codes Board.

JV3 - Report Executive summary and introduction

• Introduction – Project details

Project Name:: Joe Blog’s Warehouse and office

Project Number: CE 3067

Property Title: Joe Blog’s Warehouse and Office

Address: Somewhere, Thereville

Building Class: Class 8

Building use: Manufacturing

Applicable BCA: Volume 1, 2012

Assessment Method: JV3 – energy modeling

Compliance with BCA parts: J1, J2 and J3

Location: Thereville, Buildland

Climate Zone: 5

Software used: IES-VE

A table of the basic project data

JV3 - Report Executive summary

and introduction • Introduction

• Project Description – The project description

needs to provide, or point, to all necessary details and description of the proposed project location, size and other relevant parameters such that someone else can directly use the report to verify the results.

JV3 - Report Methodology & Analysis

This part of the report should contain: • Assumptions • Outline of JV3 method

used • What clauses of the BCA

Section J are assessed • Building fabric

assessment (walls, floors, roof, ceilings, glazing)

• Building services assessment

• Any special conditions • Operating Hours

JV3 - Report Main body of the report

1. The main body is the modelling results and analysis of the modelling results 2. For a simple compliant building this section can be quite small as it is only

necessary to demonstrate results and why it complies – the next slide has 2 results tables for comparison

3. Any exclusions, or required design changes should be discussed here and reasoning provided as to why the changes to the building design are necessary

• The modeling excludes all process related Ventilation systems within the milling building

JV3 - Report Main body – Results tables

1. Results tables – what is sometimes presented – what should be presented

Annual Energy Consumption (MWh) Time Period

Reference Building

Proposed Building

Jan 78.1803 51.3554 Feb 69.8147 46.2047 Mar 70.0583 43.1365 Apr 59.9688 34.5594 May 54.5476 30.4192 Jun 45.5895 27.8947 Jul 46.0715 28.8246 Aug 49.1038 28.8666 Sep 54.0059 28.61 Oct 62.1816 34.7663 Nov 68.5068 41.5262 Dec 74.6208 46.9102

Total 732.6497 443.0738

Building Baseline Baseline Proposed Services – Mech, Elec Hydra Baseline Proposed Proposed MWh MWh MWh Lighting 1.5222 1.5222 1.5222 Equipment 1.4642 1.4642 1.4642 Heating, cooling, and Ventilation - packaged unit 2.4568 2.4568 2.2892 Lifts 0 0 0 Hot Water 1.3705 1.3705 1.3705 Total - MWh 6.8137 6.8137 6.6461 Conversion to MJ - factor 3.6 3.6 3.6 Total MJ 24.52932 24.52932 23.92596 Conversion to Kg CO2/yr - factor 0.0548 0.0548 0.0548

Kg CO2/yr 1.344 1.344 1.311 Assessed area (m2) 60 60 60 kWh/m2 114 114 111

OR

JV3 - Report Conclusions

1. For a compliant design this can be very brief

– The results as shown in Table 1 demonstrate the proposed building with proposed services is less greenhouse gas intensive than the baseline building with either baseline or proposed services. This is in compliance with the BCA Section JV3 alternative method.

2. For a non-compliant design this should provide all necessary instruction to inform the design team of what changes are required and refer them back to the main body sections for reasoning

JV3 - Report Appendices

A. Occupancy and Operational Profiles used in the assessment

B. Full table of all the input data for both the baseline model and the proposed model

C. A transmittal of all the Architectural, Mechanical, Electrical, and Hydraulic Drawings used to generate the model

D. An assessment of the building envelope, if required E. All relevant calculations NOTE: Not all appendices are required for all projects

JV3 PROPOSED – 2 Page Compliance Document

– Would it be beneficial to have a standard 2 page compliance form?

– Could this form be an online form? – Would it be beneficial to certifiers to have all energy

assessors registered online?

• 2-page report – Covers energy assessors registration – Records project basic data – Records JV3 protocols applied to this project – Records results of energy modelling – Records any compliance issues

Things to Ponder Online Section J reporting submissions and verification

We do our banking online We buy lots of stuff over the internet

Why

– Online compliance assessment could reduce variation and inconsistencies in reporting

Advantages

– Energy efficiency compliance records are online – All compliance assessments and reports will have the same baseline – Potential for self assessment – reduced cost

Things to Ponder Does the current Reduction of Green House gas emissions take into account:

1. Life Cycle assessment 2. Cradle to Cradle products 3. Actual building energy use

What happens if the actual building does not performance to the design compliance assessment predicted – who is responsible – can the building owner sue?

Hints and Tips 1. In all assessments – make sure they are signed by

the energy assessor 2. Check the project details align with the Certifiers

details in their assessment 3. Check there are three energy models and results 4. Check the results include an assessment of GHG

emissions – not just kWh/annum 5. Read the list of assumptions - check they are

reasonable 6. Current BCA section J minimum compliance – results

that show 50% energy reductions are questionable without sophisticated energy management and high efficiency systems in the building, or alternative generation technologies

Summary – Started with looking at a quick comparison of

DTS and JV3 assessment – Ran through the process of JV3 assessment – Looked at the structure and contents of a JV3

report – Finally presented some items to ponder and

have given some hits and tips for assessing a report

Thank You