Performance Testing of an Open Reciprocating Refrigeration Compressor Over a Range of Speeds

A load stand has been built and used to determine the performan ce of an open type reciproca ting refrigera tion compresso r over a range of speeds.The load stand and instrume ntation are described and sample test readings are given.Measured performan ce characte ristics for the compresso r over a range of speeds are presented .Aspects of the load stand are discussed and conclusio ns are drawn from the results of the compresso r tests.SYMBOLS m mass flow rate of refrigera nt through the compress or, kg/s Q rate of heat transfer in the heat exchange r, W h• I specific enthalpy of refrigera nt at measurem ent location i, J/kg A,B,C,D load stand control valves a,b,c, •• measurem ent locations on the load stand M.E.P. mean effective pressure, bar TDC top dead centre position BDC bottom dead centre position Emech mechanic al efficienc y Evol volumetr ic efficienc y 242