Hydrocarbon (HC) technology attracted more attention at ATMO Europe than ever before, with Emerson, Embraco, Huayi and Blupura showcasing their latest solutions. Heat pump and ultralow cascade systems were among the solutions presented, while suppliers continued to discuss EU charge limits. The bottom line: hydrocarbon technology can be found in more and more applications, from water fountains to heat pumps. + VIDEO
“In low temperature display cabinets it’s kind of standard practice to use hermetic compressors with propane and we believe the use of hydrocarbons can be extended to a number of applications,” Kandi said. “Self-contained display cases (using hydrocarbons) – this is a technology that is really emerging.”
“If we compare the HFC cascade system efficiency to propane and ethane cascade systems with the same conditions we can see even from a theoretical point of view the benefit of hydrocarbons over HFCs,” Zgliczynski said.
“When we started propane was not applicable in all world regions, now it is a global refrigerant solution. It’s an environmentally friendly solution and highly efficient,” he said. “As a small compressor producer, hydrocarbons are considered a high-pressure refrigerant – the other advantage over R134a and other medium or low pressure refrigerants with low displacement, is that we can cover a higher cooling capacity.”
“The water can be taken with a pre-paid card,” Constantini said. “For example in Italy there are companies that sell pre-paid cards for €5, charged with 100 litres, so the water is sold at five cents per litre, which means it is four or five times cheaper than bottled water in a supermarket. It’s a very good service for the community to supply cool water at an affordable price.
“We did some modeling to see if the COPs we could expect were high and the results were good. We were able to analyse what the COP was at different condensation and subcooling pressures. When we took the water temperature of 10°C at the unit of the condenser and we changed the condensation pressure (amount of subcooling) we saw the optimum for each temperature at the inlet (water temperature):“We’re trying to significantly increase the subcooling on the heat pump and trying to maintain good efficiency for the set condenser and subcooling,” Corberán said.
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