Combined heat & power
the system’s effectiveness and had lengthened its payback period.
The heating and hot water system was also linked to a nearby student accommodation block to work as part of a district heating scheme to allow additional run hours to be utilised. As well as installing five 1,200kW cast iron boilers, the pairing of the 140kWe CHP system with a 34,000 litre thermal store would ensure any excess heat generated could be recovered and re-used the following day, further enhancing the efficiency of the system.
Further benefits
The Quality Assurance scheme for Combined Heat and Power (CHPQA) recognises the environmental and security benefits of well-designed and operated CHP schemes. Although a voluntary scheme, it offers many benefits and provides a route for further savings from Climate Change Levy (CCL) exemption, access to Enhanced Capital Allowances, and exemption of plant and machinery from business rates. For small scale schemes where no heat rejection is used, the CHPQA allows a simpler approach to monitoring the quality of the scheme by metering of the gas used and electricity produced. CHP schemes have the potential to offer some of the most cost-effective savings of CO2 as well as helping with the security of electricity supplies, but as with all renewable and low carbon technologies, well designed, installed, and operated systems are the key to universities realising these savings.
CHP schemes have the potential to offer some of the most cost- effective savings of C02 as well as helping with the security of electricity supplies
Coventry University’s arrangement is an example of a correctly sized CHP system
www.heatingandventilating.net
July 2017
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