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Ene 05 Energy efficient cold storage

Number of credits available	Minimum standards
2	No

Aim

To recognise and encourage the installation of energy efficient refrigeration systems, therefore reducing operational greenhouse gas emissions resulting from the system's energy use.

Assessment criteria

The following is required to demonstrate compliance:

One credit - Refrigeration energy consumption

The refrigeration system, its controls and components have been designed, installed and commissioned as follows:
1. In accordance with the Code of Conduct for carbon reduction in the refrigeration retail sector1Code of Conduct for carbon reduction in the retail refrigeration sector, Carbon Trust, British Refrigeration Association, Institute of Refrigeration (June 2011). (see Other information) and BS EN 378-2 Refrigeration systems and heat pumps - Safety and environmental requirements.
2. Using robust and tested refrigeration systems/components, normally defined as those included on the Enhanced Capital Allowance (ECA) Energy Technology Product List (ETPL)2Enhanced Capital Allowance (ECA) Scheme Energy Technology Product List (ETPL): https://etl.decc.gov.uk/etl/site.html or an equivalent list (see CN3.2 for a list of components).
The refrigeration plant has been commissioned to comply with the criteria for commissioning outlined in BREEAM issue Man 04 Commissioning and handover.

One credit - Indirect greenhouse gas emissions

Criteria 1 and 2 have been achieved.
The installed refrigeration system demonstrates a saving in indirect greenhouse gas emissions (CO₂ eq.) over the course of its operational life.

With reference to The Carbon Trust Refrigeration Road Map3Refrigeration Road Map – An action plan for the retail sector, Carbon Trust, CTG021, 2012 (http://www.carbontrust.com/resources/guides), this can be demonstrated through specification of technologies described in CO₂ emissions saving options available when designing a new store/retail concept that delivers savings in comparison with the 'baseline' building. Refer to the Methodology section for further information.

Note: for non-retail building types with cold storage refrigeration systems, refer to compliance note CN3.1.

Checklists and tables

None.

Compliance notes

Ref	Terms	Description
Shell and core
CN1	Applicable assessment criteria	Option 1 - Shell only: This issue is not applicable. Option 2 – Shell and core: Where cold storage systems are specified/installed, all assessment criteria relevant to the building type and function apply. Refer to Appendix D – BREEAM UK New Construction and Shell and Core Project Assessments for a more detailed description of the above shell and core assessment options.
Simple buildings
CN2	Applicable assessment criteria	This issue is not applicable.
General
CN3	Scope of this BREEAM issue	This issue is applicable only in instances where commercial/industrial sized refrigeration and storage systems are specified, for example: Storage and refrigeration of food in supermarkets Cold storage facilities in industrial, laboratory, healthcare and other buildings. The criteria do not apply to: Domestic scale refrigeration or Refrigeration for kitchen and catering facilities where these are self-contained units not connected to building cooling systems. These types of installation are covered within BREEAM issue Ene 08 Energy efficient equipment. If the building does not contain commercial/industrial sized refrigeration system(s), this issue is not applicable to the assessment.
CN3.1	Non-retail buildings and the Carbon Trust Refrigeration Road Map Action Plan See criterion 4.	The Carbon Trust Refrigeration Road Map introduces the main energy saving opportunities for refrigeration use in the retail sector and defines a ‘baseline supermarket’. However, many of the technologies outlined in the Road Map are appropriate to non-food applications and therefore non-retail building types that specify or install cold storage systems. If the ‘baseline supermarket’ does not provide an appropriate benchmark for achieving the second and third credit, the design team can still comply with the criteria by demonstrating a reduction in indirect greenhouse gas emissions (CO₂ eq.) against an alternative baseline. The design team must confirm details of the alternative baseline system used, and demonstrate that it is based on a typical installation/technology for that building type. The systems being compared must have the same duty and service conditions and include the relevant consumption from the refrigeration system's ancillary equipment.
CN3.2	Components on the ECA Energy Technology Product List See criterion 1b.	Where specified as part of the refrigeration system, products used for the following components must be listed on the ECA Energy Technology Product List (or equivalent list): Air cooled condensing units Automatic air purgers Cellar cooling equipment Commercial service cabinets (cold food storage) Curtains, blinds, sliding doors and covers for refrigerated display cabinets Evaporative condensers Forced air pre-coolers Refrigerated display cabinets Refrigeration compressors Refrigeration system controls.
CN3.3	Extensions to existing buildings	If the assessed building is an extension to an existing building and there is cold storage plant in the existing building that will serve the new extension, then this plant must meet the criteria in order to achieve any available credits.

Methodology

Calculating indirect greenhouse gas emissions (CO2eq.)

The indirect emissions must be calculated in accordance with the procedures in BS EN 378-14BS EN 378:2008 Refrigerating systems and heat pumps. Safety and environmental requirements, BSI.- Refrigerating system and heat pumps safety and environmental requirements, Annex B. Further detail on applying this method to calculate the indirect emissions are available in the Guideline methods of calculating Total Equivalent Warming Impact (TEWI5Guideline methods of calculating TEWI Issue 2, 2006, BRA Specification, British Refrigeration Association.) published by the British Refrigeration Association (BRA).

Calculations must be carried out by an appropriately qualified professional (e.g. a building services engineer), including calculations to justify for assumptions and methodologies for savings in indirect greenhouse emissions.

Evidence

Criteria	Interim design stage	Final post construction stage
All	One or more of the appropriate evidence types listed in The BREEAM evidential requirements section can be used to demonstrate compliance with these criteria.
2	Refer to generic evidence requirement above	Refrigeration plant commissioning record

Additional information

Relevant definitions

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: https://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.

Other information

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.