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Pumping up the heat for a climate-friendly future
Date:6/11/2010

running costs and efficiency. This enabled them to specify and simulate the type of compressor and heat exchanger required to achieve optimal efficiency.

One critical factor, resolved on the suggestion of Serbian business partner Klima, was the choice of ammonia as the heat pump's coolant. Project manager Srdjan Andrejevic explains how, as well as beating the competition on safety and environmental grounds - it is not explosive, as isobutane is, and it presents no threat to the ozone layer, as Freon does it offered the maximum cooling capacity per kilo of coolant used, which brought down the cost of the unit as it meant the pump could use a lower-volume compressor. Klima and its parent company Mayekawa in Belgium designed the compressor, with unexpectedly good results: for each kW of energy consumed, the pump delivers 6.4kW of heat. The project had delivered a world-class result.

The prototype heat pump does not just heat water to 85 degrees Celcius; it can also be used in reverse, to cool water for reinjection into the ground. The technology has already proved its worth in Lendava: "The heat from the heat pump is cheaper than natural gas. People have cheaper heating," said Evgen Torhac;. Rather than relying on a reserve of fossil fuels to supplement the heat supplied from the town's geothermal well, now it can action the heat pump first, and only use fossil fuels as a last resort.

Although the purchase price of the technology is high, the new pump offered a fair return on investment: four years, assuming the heat pump functions for 1,565 hours per year. And with continued policy support, the roll-out of the technology is expected to go from strength to strength.

"Not only is the development and production of the HTH pump an achievement, but indirect benefits are targeting the environment protection sector as well as the building industry," said Zoran Stevanovic. Already, since completing the project, Klima and Mayekawa have tail
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Contact: Piotr Pogorzelski
piotr.pogorzelski@eurekanetwork.org
322-777-0979
EUREKA
Source:Eurekalert

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