The absorption refrigerator is a refrigerator that utilizes a heat (e.g., solar, kerosene-fuele flame) source to provide the energy needed to drive the cooling system rather than being dependent on electricity to run a compressor. These refrigerators are popular where electricity is unreliable, costly, or unavailable, where noise from the compressor is problematic, or where surplus heat is available, e.g., from turbine exhausts or industrial processes. Absorption refrigerators, powered by liquefied petroleum gas, are also used for food storage in recreational vehicles.