The organisation launched a new guide to the technology, the Heat Recovery Overview Guide, last week. Richard Rugg, Director of Carbon Trust Programmes, said: “Waste heat and you are wasting money. Even though it’s been slightly warmer outside, there’s still plenty of opportunity to make heat savings inside. From office-based businesses to retailers and manufacturers, there are significant opportunities to recover and reuse heat, save money and boost your bottom line”.
The booklet expands on its previous advice on trimming refrigeration costs, which the Carbon Trust said in July could make up 70 per cent of a small business’ energy spend. An average boiler loses 25 per cent of its heat, making it a prime candidate for energy saving. But the guide also suggests recovering heat from server rooms, cooling equipment and ventilation systems in order to reduce demand for heat energy. Installing boiler flue economisers in an office with annual energy bills of £15,000 could pay back in just four years, the Carbon Trust said, while fitting a 70 per cent efficient plate heat exchanger in a typical office is likely to cut total gas consumption by 38 per cent.
For a typical new-build 250-person office, installing a de-superheater to capture heat from cooling equipment could cut £1,000 from gas bills by providing energy for space heating. The Trust advises that supermarkets and convenience stores could use heat recovered from refrigeration units to provide 75-90% of their hot water needs – equivalent to 2 or 3% of their total CO2 emissions.
The guide is free, and includes a useful, simple checklist and examples of best practice, and can be downloaded from the Carbon Trust website.