(3 credits available)
To recognise and encourage the installation of energy efficient refrigeration systems, therefore reducing operational greenhouse gas emissions resulting from the system's energy use.
The following is required to demonstrate compliance:
One credit - Energy efficient design, installation and commissioning
|1||With respect to the refrigeration system, its controls and components:|
|1.a||A strategy for the design and installation has been produced and implemented by a Suitably qualified engineer from Concept Design stage onwards. The strategy is multidisciplinary and contains both an aim and a method to achieve the lowest practicable environmental impact including energy use, carbon emissions and refrigerant impact|
|1.c||At least 50% of the relevant energy efficient design features (refer to CN2.1) have been specified or installed|
|1.d||Control systems have been installed to minimise refrigerant temperature lifts by providing controls that optimise evaporator temperature levels and avoid head pressure control|
|1.e||Energy sub-metering has been installed to provide adequate central monitoring of operating parameters and collection of data on plant performance, temperature levels and energy consumption. This does not necessarily require the 'energy monitoring' credits to have been awarded|
|1.f||The design has minimised the requirement for manual override of plant controls and equipment in normal operating conditions through the specification of central automatic controls, anti-tamper controls, automatic lighting controls, fixed set-point temperature and temperature dead bands|
|1.g||The design specification details appropriate commissioning and test procedures to be undertaken at completion|
|1.h||The installation adheres to the design specification and any necessary changes have been carried out with the approval of the Suitably qualified engineer and are formally documented.|
|2||The refrigeration system has been commissioned as follows:|
|2.a||In compliance with criterion 5 for 'Commissioning' outlined in BREEAM issue Man 04 Commissioning and handover. This does not necessarily require the 'Commissioning' credits to have been awarded|
|2.b||Documentation has been provided showing due diligence and compliance with test and commissioning procedures relevant to the installation, such as pressure testing, leakage testing and validation to specification.|
One credit - Energy efficiency criteria
|3||The refrigeration system uses robust and tested components that meet published energy efficiency criteria (refer to CN2.2).|
One credit - Indirect greenhouse gas emissions
|4||Criteria 1 and 2 are achieved.|
Checklists and tables
|Applicable assessment criteria|
|Part 1: Fabric and structure||This issue is not applicable|
|Part 2: Core services||Criteria 1 to 5 are applicable|
|Part 3: Local services||Criteria 1 to 5 are applicable|
|Part 4: Interior design||Criteria 1 to 5 are applicable|
|Scope of this BREEAM issue||
This issue is applicable only in instances where commercial or industrial-sized refrigeration and storage systems are specified, for example:
The criteria do not apply to:
These types of installation are covered within BREEAM issue Ene 08 Energy efficient equipment. If the building does not contain commercial or industrial-sized refrigeration systems, this issue is not applicable to the assessment.
|Energy efficient design features||
Below are some design options that are intended to achieve best practice energy efficiency of the cold storage equipment.
Where features are to be excluded the suitably qualified engineer must provide written justification for determining which are unachievable.
Published energy efficiency criteria.
See criterion 3 .
Please refer to the country-specific reference sheet to locate the appropriate published energy efficiency criteria in the country of assessment.
Alternatively, please demonstrate that the eligibility criteria are equal to or more onerous than those in the ECA Energy Technology Product List (ETPL): etl.decc.gov.uk.
Where specified as part of the refrigeration system, products used for the following components must meet published energy efficiency criteria:
|Refurbishing part of an existing building||Where only part of an existing building is being refurbished and there is cold storage that will serve both the refurbished part and the unchanged part of the building, then this plant must meet the criteria in order to achieve any available credits.|
Calculating indirect greenhouse gas emissions (CO₂ₑ.) using TEWI
When calculating the Total Equivalent Warming Impact (TEWI) factor, the following equation must be used where the various areas of impact are correspondingly separated:
As the criteria looks only to calculate the indirect emissions from the refrigeration system, only the impact of the energy consumption of the system needs to be calculated:
TEWI Equation Terms
Total equivalent warming impact (kgCO2e)
Impact of leakage losses
Impact of recovery losses
Impact of energy consumption
|Global warming potential of gas in the insulation (CO₂ related)|
|Global warming potential (CO₂ related)|
|System operating time (yr)|
|Refrigerant charge (kg)|
|Recovery or recycling factor between 0 and 1|
|Energy consumption (kWh/yr)|
|CO₂ emission (kg/kWh)|
|Refrigerant charge in the insulation system (kg)|
|Rate of gas recovered from the insulation at the end of life between 0 and 1|
Calculations must be carried out by a Suitably qualified engineer (e.g. a building services engineer), including calculations to justify the assumptions and methodologies for savings in indirect greenhouse emissions.
|criteria||Interim design stage||Final post-construction stage|
One or more of the appropriate evidence types listed in 4.0 The BREEAM evidential requirements section can be used to demonstrate compliance with these criteria.
|2||Refer to the generic evidence requirement above..||Refrigeration plant commissioning record|
- ECA Energy Technology Product List (ETPL)
- The ETPL is part of the government's Enhanced Capital Allowance Scheme, a key part of the government's programme to manage climate change. The scheme provides a tax incentive to encourage investment in low carbon energy saving equipment that meets published energy efficiency criteria. The Energy Technology List (ETL) details the criteria for each type of technology, and lists those products in each category that meet them:etl.decc.gov.uk/etl/site.html.
- Indirect operational greenhouse gas emissions
- These are the indirect greenhouse gas emissions that result from the production of energy used to power the refrigeration system's cooling plant. This includes the emissions from the production of grid electricity or an on site source of energy generation, e.g. gas CHP. In the case of refrigeration systems, the term 'direct greenhouse gas emissions' is also used; this refers to the emissions that occur as a direct result of leakage of refrigerant from the system. The impacts of direct greenhouse gas emissions from refrigeration systems are dealt with in the BREEAM issue Pol 01 Impact of refrigerants. Therefore, only indirect emissions resulting from the energy consumption of the system are covered in this issue.
- Suitably qualified engineer
- An individual achieving all the following items can be considered to be 'suitably qualified' for the purposes of this BREEAM issue:
- Has the authority to make decisions in regards to the final design
- Holds a degree or equivalent qualification in building services engineering or a relevant related subject
- Has a minimum of five years relevant design experience (Suitably qualified engineer within the last seven years). Such experience must clearly demonstrate a practical understanding of factors affecting the design of cold storage and include related CPD.
Code of Conduct for carbon reduction in the retail refrigeration sector
The Code of Conduct has been developed by the Carbon Trust, in partnership with the Institute of Refrigeration (IoR) and the British Refrigeration Association (BRA). The Code is intended to compliment the Carbon Trust Refrigeration Road Map.
BREEAM International Non-Domestic Refurbishment 2015
Reference: SD225 – Issue: 1.4
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