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Overview of savings that can be made cost effectively
Cities
| City |
Carbon emissions over summer (thousand tCO2) |
Carbon wasted over summer (thousand tCO2) |
Cost of carbon wasted over summer (£M) |
% Cost saving |
Number of times the new Wembley stadium can be filled |
| Cardiff |
269 |
50 |
3 |
17% |
6 |
| Newcastle upon Tyne |
202 |
38 |
3 |
21% |
5 |
| Liverpool |
310 |
58 |
4 |
19% |
7 |
| Manchester |
427 |
81 |
6 |
21% |
10 |
| Leeds |
590 |
112 |
8 |
20% |
14 |
| Birmingham |
573 |
106 |
7 |
18% |
13 |
| Greater London |
5963 |
1135 |
79 |
19% |
144 |
| Oxford |
136 |
26 |
2 |
22% |
3 |
| City of Bristol |
296 |
57 |
4 |
20% |
7 |
| Belfast |
210 |
40 |
3 |
21% |
5 | All figures are calculated for businesses only
Vertical sectors
|
Carbon emissions over summer (thousand tCO2) |
Carbon wasted over summer (thousand tC) |
Cost of carbon wasted over summer (£M) |
% Cost saving |
| Chemical |
6161 |
739 |
43 |
12% |
| Food & Drink |
3680 |
442 |
26 |
12% |
| Manufacturing |
30791 |
3695 |
226 |
12% |
| Wholesale & Retail |
8926 |
1738 |
139 |
20% |
| Leisure |
4026 |
678 |
53 |
17% |
Case studies
J Sainsbury plc
Sainsbury’s has reduced its carbon emissions considerably, following a concerted energy efficiency programme which has seen them work alongside the Carbon Trust. Its goal is to reduce carbon dioxide emissions by sourcing energy responsibly, minimising energy demand and promoting efficient consumption, and, having invested £14m in measures over the last three years, various projects are already paying dividends.
The retailer has achieved a 20 per cent CO2/m2 reduction on energy use between 2001 – 2005, against an initial target of 10 per cent. Energy efficiency projects alone have contributed to an 11 per cent decrease in carbon emissions. This reduction in energy use equates to a cost saving of in excess of £8M per annum from the start of the target period - 1997/98. Various stores are also taking a lead on reducing fossil fuel energy, with a wind turbine at East Kilbride depot, Greenwich and Kingston stores, installations of Combined Heat and Power* in five stores, solar panels and natural lighting in the Greenwich store.
Westbury Dairies Westbury Dairies is the largest single-site dairy in the UK and has the capacity to process over 2.5 million litres of milk per day. Processing these volumes clearly requires a large amount of energy, and in 2004 Westbury’s annual bill was in excess of £2m.
The company’s mission statement is to become the “most efficient, flexible, world-class manufacturer of creams, butters and milk powders” and was already relatively energy efficient when it contacted the Carbon Trust, consuming 43.5% less energy than a typical dairy. However, with energy costs expected to significantly rise in 2005 Allan Walker, Westbury Dairies’ Engineering Manager still wanted to investigate what more could be done to reduce its spend and carbon emissions. Although he was dubious about how the Carbon Trust could help achieve worthwhile savings on a process that had already been designed to such high energy efficient standards, he was impressed by the scale of the opportunities identified so far.
It was estimated that if all the measures were taken, Westbury Dairies would realise an annual saving of over £400,000 each year on their energy bill, as well as reduce their carbon emissions by almost a sixth.
The Carbon Trust
- The Carbon Trust works with UK business and the public sector to cut carbon emissions and develop commercial low carbon technologies. An independent company set up by Government to help the UK meet its climate change obligations, the Carbon Trust creates practical business-focused solutions to carbon emission reduction on energy efficiency, carbon management, and investment.
- The Carbon Trust's annual funding is in excess of £105m in grants from the Department for Environment, Food and Rural Affairs (Defra), the Department of Trade and Industry (DTI), the Scottish Executive, the Welsh Assembly Government and Invest NI.
- The Carbon Trust also promotes the Enhanced Capital Allowance (ECA) Scheme for energy saving investments on behalf of Defra and manages the associated Energy Technology List. This ECA scheme is a tax relief that enables businesses to claim 100% first-year capital allowances on investments in energy saving equipment listed on the approved Energy Technology List. Further details on qualifying products and ECAs are available at www.carbontrust.co.uk/eca
- For advice on energy efficiency and reducing carbon emissions contact the Carbon Trust on 0800 917 3030 or visit www.carboncosts.com.
Overview of methodology to calculate the energy costs and carbon emissions
- In order to do this it was necessary to determine monthly energy consumption by end-use (e.g. heating, cooling, lighting) since the consumption in these areas varies over the year.
- The monthly energy consumption was calculated by fuel type so that the different carbon emission factors and costs for each fuel type could be used to determine summer carbon emissions and costs.
- To determine wastage, two definitions of waste were used. The first assumed that the savings which are estimated to be available from applying all cost effective measures was equivalent to energy wasted. The second assumed that the savings which are estimated to be available from applying all operational (i.e. no cost, managerial and good housekeeping) measures was equivalent to energy wasted. The latter is a subset of the former.
- Summer is defined as being June to September inclusive.
The research was undertaken by BRE. For more detailed information on the methodology please contact the Carbon Trust Press Office on 020 7544 3100.
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