Experimental investigation on the gamma model Stirling engine for cooling production using various gases

The Stirling Cycle is one of the thermodynamic cycles that is close to Carnot cycle in term of theory, and these advantages cause to using Stirling engines in wide industries. The main objective of this research is experimental investigation of Stirling Gamma engine for refrigeration. In this investigation, effect of working fluid air and helium, operatring pressure of working fluid and dynamo power on refrigereation generation have been investigated. Results show that with using air fluid with power 520.8 W and operating pressure 3 bar and in 10 minutes could reach to temperature -23°C and with using Helium fluid in power 420 W and operating pressure 6 bar and in 10 minutes could reach to temperature -21°C. In experimental implement has been tried to reach lower than 10 percent error results in various part of engine like, insulation, leaking, belt lash and measurement devise Results show that increasing power of power supply mean gas pressure, time of turning on power supply and using fluid such as air, helium are effective in refrigeration.