Frigesco receive funding to develop air source heat pump flash defrost system

Frigesco receive funding to develop air source heat pump flash defrost system

UK:  Frigesco, the company pioneering ultra-efficient flash defrost technology for refrigeration, has been awarded new DECC funding of £102,000 to develop the system for use in air source heat pumps.

Flash defrost, which has recently won a string of innovation awards, can reduce supermarket cooling energy costs by up to 20 per cent. Field trials in working supermarkets are currently underway with results expected shortly.

The latest grant, conferred under DECC’s Energy Entrepreneurs’ Fund, will be used to fund joint research by Frigesco and heat pump specialist Glen Dimplex, designed to develop flash defrost technology for application in air source heat pumps (ASHPs).

​David Walter, managing director of FrigescoDavid Walter, managing director of Frigesco, explained: ”Coils on ASHPs operating in cool conditions (below 7C) in humid climates quickly ice up, and need to be regularly defrosted to maintain performance and reduce energy use. Existing approaches consume extra power, which can account for a significant component total energy use, reducing their efficiency.

“Frigesco’s system saves all the electrical power normally used for defrost, so applying it to ASHPs should deliver a significant increase in energy efficiency and an associated reduction in grid carbon dioxide emissions. It is a very exciting further application for flash defrost, and we believe it has great potential.”

air source heat pump

The project involves designing and building a flash defrost system which can be built into new ASHP units. It will be trialled with a production version of a Glen Dimplex A16M ASHP, whose performance and energy characteristics have been documented across the climate spectrum.

The tests will be repeated and recorded after the unit has been fitted with the Frigesco defrost system, and the effect on annual energy consumption and carbon dioxide emissions established to EN14511:2013 standards.

Frigesco received DECC funding of £145,000 in 2012/13 to support its development of a flash defrost for use in refrigerated display cabinets. Field trials have been taking place in supermarkets in the UK, mainland Europe, the US and South Africa, with results expected to be complete by the end of the first quarter of 2015.

Its latest project on ASHPs will begin in the New Year, and last for 12 months.

For more information: call David Walter on +44 (0)1392 247 943 or +44(0)7889 368 629; Email:;  Web:

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  • Although there's NOT really any 'waste' heat to generate this effect, if they actually did a bit of research they would see that Thermia have tackled this problem utilising a thermal layer of 'stored' heat. I'm sure however there are other ways to reduce energy consumption and would be interested to find out how their research goes.
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