Solution for a heat pump without cooling fluid
Stiral has designed a heat pump based on a Stirling engine. Instead of using energy linked to the changing phase of a cooling liquid, as is the case with conventional heat pumps, our device uses energy linked to the isothermal compression and expansion of a gas to generate thermal energy.
Unlike scroll compressors using coolant liquid, there is no technological limitation on using Stirling engines in association with industrial heat pumps. They can operate at temperatures in excess of 120°C.
In thermodynamic terms the Stirling cycle comes closest to the ideal cycle imagined by Carnot, consequently yielding the greatest theoretical performance.
The European Union’s new directive on the use of fluorinated gases aims to drastically reduce the sale and use of such gases. In several sectors their use will be prohibited in new equipment between now and 2030.
Innovation is needed to find alternative solutions, which is why it is worth developing the potential of the Stirling engine for use with heat pumps.