As the industry takes a look at refrigerants beyond HFCs, a lot of attention has been focused on CO2 (carbon dioxide). Another refrigerant that has been looked at over the years is R-290 - propane.

Based on a presentation to the GPA Europe Annual Conference, Prague, Sept. 21-23, 2011. Operational scenarios for two uses of a new refrigeration process for recovering NGLs from natural gas have ...

Geothermal heat pumps remove heat from one place and transfer it to another. They use the earth, or water in the earth, for their heat source and heat sink. This heat for the earth comes from the ...