Energy efficiency Supermarket case study
Enter the CIBSE Building Performance Awards
Have you worked on a new- build project completed in the past year, which you think sets high standards for energy efficiency and sustainability? Or perhaps you have worked on a refurbishment project that successfully reduced energy use in a building? If so, make sure your project gets the recognition it deserves and enter the CIBSE Building Performance Awards. There are 13 categories this year – including
New Build Project of the Year, Refurbishment Project of the Year, and Building Operation – and judges will be looking for buildings that have combined construction materials with low carbon and renewable technologies to improve building performance and reduce carbon emissions. They will also be looking to ensure that they meet the high levels of comfort required by the building occupants. The closing date is 8 October 2010. For the full list of categories, and the entry criteria, along with entry forms visit:
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working areas and plant rooms. The latter areas should be visited to identify potential problems with equipment and control systems. Actions taken by the organisation to reduce energy consumption should be publicised via notice boards to assist in improving the levels of awareness at the site.
Energy-efficiency measures at the new store have had a big impact on CO2 emissions
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• Regular reviews: once initial energy-saving measures are in place, the organisation should conduct regular reviews, which should cover both management and technical opportunities and should record all activities that will have an impact on energy consumption. They should also identify further opportunities for energy saving. The reviews should be completed both during working group meetings and site tours covering
Table 1: Short- and medium-term energy-saving measures
Electricity savings estimate (kWh/yr)
Shorter-term payback measures: Reinforce existing energy management practices and staff awareness Bakery and server room sub-metering Sub total
Medium-term payback measures Lighting level review and reduction Install variable speed drives Sub total
TOTAL
50,440 14,600 65,040
4,790
17,400 22,190
87,230 0 10,000
Biomass savings estimate (kWh/yr)
10,000 0
10,000 (te CO2
Carbon dioxide saving /yr)
Cost
saving (£/yr)
Guide price (£)
27 3,600 1,000 8 1,100 1,500 35 4,700 2,500
3 350 1,320
9 1,300 6,000 12 1,650 7,320
47 6,350 9,820 Simple payback period (yrs)
0.3 1.4 0.5
3.8 4.6 4.4
1.5
Refer to report section
9.1 9.2
• Sub-meters: the bakery and IT servers are a significant electricity use and currently operate as required with little oversight on their use. Installing sub-meters that can be read automatically, along with other meters on site, with usage information provided to the store manager would enable staff to see how the use was related to operational requirements. A reduction plan, such as shutting down ovens when not required and ensuring IT servers are correctly cooled, with appropriate savings targets, could then be put in place to reduce this use.
• Lamp replacement: The plant rooms and some staff areas are continuously lit with standard fluorescent
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9.3 9.4
46
CIBSE Journal October 2010
www.cibsejournal.com
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