Editing Recuperator (section)

==Gas turbines==
[[Image:GasTurbine.svg|thumb|Cutaway of a recuperated microturbine]]

Recuperators can be used to increase the efficiency of [[gas turbines]] for power generation, provided the exhaust gas is hotter than the compressor outlet temperature. The exhaust heat from the turbine is used to pre-heat the air from the compressor before further heating in the combustor, reducing the fuel input required. The larger the temperature difference between turbine out and compressor out, the greater the benefit from the recuperator. <ref>Çengel, Yunus A.; Boles, Michael (1994). Thermodynamics: An Engineering Approach</ref> Therefore, [[microturbine]]s (<1 MW), which typically have low pressure ratios, have the most to gain from the use of a recuperator. In practice, a doubling of efficiency is possible through the use of a recuperator.<ref>{{cite web |url= http://hiflux.co.uk/applications/microturbine-recuperators/ |title= Microturbine Recuperators |work= Hiflux Limited }}</ref> The major practical challenge for a recuperator in microturbine applications is coping with the exhaust gas temperature, which can exceed {{convert|750|°C}}.