This has been discussed before on Ars, such as at https://arstechnica.com/civis/threa...ost-efficient-heat-pump-in-the-world.1501605/, and https://arstechnica.com ...

Gas engine-driven heat pump systems integrate a combustion engine with conventional vapor compression technology to provide heating and cooling while utilising waste heat recovery. These systems offer ...

An international research team has conducted a computational analysis on propane (R290) vapor compression heat pumps integrating a thermoelectric subcooler (TESC) to reduce the power consumption of ...

Here’s what you’ll learn when you read this story: Scientists created an engine made of only silica particles suspended an electric field, and cranked temperatures up high enough to rival the Sun’s ...

Turbocharged engines offer performance and efficiency, but come with unique long-term ownership challenges.