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ENE-5 PEAK ENERGY DEMAND REDUCTION

 

Credit Interpretation Request

Use of actual measured data

Credit Interpretation Request Number
ENE5-C-OB1-0271

Ruling
2012-01-12

The Credit Interpretation Request to use actual measured energy consumption data to calculate the peak demand reduction is denied.

The CIR Review Panel notes that the project must use documentation requirements as set out in the Green Star SA - Office v1Technical Manual. The CIR Review Panel also wishes to note that the CIR also proposes the use of extrapolated measured energy data to estimate the building electrical demand (even though this was not the request raised in the CIR), which is also not an acceptable proof of compliance with credit criteria.

 

Erratum

Green Star SA - Office v1 Technical Manual: Page 157

Erratum Number
ENE5-E-OB1-0264

Guidance
2011-08-08

Documentation Requirements, below heading "a) Active peak electrical demand reduction" :

Second bullet point reading, delete text in brackets:

"...(building must be compliant with SANS 204:2008 - refer to Green Star SA - Office v1 Energy Calculator & Modelling Protocol Guide for details)"

 

Technical Clarification

Notional building clarification

Technical Clarification Number
ENE5-T-OB1-0265

Guidance
2011-04-13

In determining the active Peak Electrical Demand Reduction for Ene-5 credit, the "notional building" referenced, refers to the actual building (with geometry, orientation, fabric, services etc. as per the actual design) but without the inclusion of the benefit of the active peak energy demand reduction systems.

Thus as an example, in the case of a building using onsite electrical generation (renewable or otherwise) as an active peak electrical demand reduction intervention, the active peak electrical demand reduction is determined by comparing the maximum electrical peak power of the "notional building" (i.e. without the onsite generation contribution) and the maximum electrical peak power of the "actual building" (i.e. including the onsite generation contribution).

 

Technical Clarification

Photovoltaics without battery storage

Technical Clarification Number
ENE5-T-OB1-0103

Guidance
2010-09-07

The Technical Manual states that “Peak energy demand reduction systems that could comply with the credit’s requirements include but are not limited to:… Photovoltaics (with battery storage)”. The Technical Manual does not prevent the use of photovoltaic (PV) systems being connected to the building’s electrical network as opposed to a battery storage system. Should PV systems be used in such a scenario without battery storage and the project wishes to claim points under this credit, the peak electrical demand reduction claimed must be calculated using the building’s 24 hour load profile containing the highest expected annual peak (without the PV supply), determined via modelling or from first principles, and the project’s PV electrical supply curve/profile determined using the performance specifications of the proposed PV system and using the appropriate climatic data for that same day. Projects are required to submit the documentation as per the Technical Manual and ensure that the proposed maximum electrical demand reduction system meets the Credit Criteria. The Certified Assessors will look for evidence that an appropriate peak baseline is determined and that the PV system supply curve/profile has been determined using the specifications of the proposed PV system.

 

Technical Clarification

Passive design

Technical Clarification Number
ENE5-T-OB1-0014

Guidance
2009-02-06

Per the Green Star SA - Office v1 Technical Manual, page 157, passive designs can claim the credit for the flatter overall demand curve, but not for the active peak energy demand reduction. This credit deals with active reduction of peak electrical demand of the as-designed building, or achievement of a flatter electrical demand curve. Decreased demand through efficient design is rewarded in Ene-1 Greenhouse Gas Emisions.

 

Technical Clarification

Demand curve

Technical Clarification Number
ENE5-T-OB1-0003

Guidance
2009-02-05

Projects must look at the peak energy demand over the 24 hour demand curve, not just the regularly occupied hours.

 

 

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