Maximum Allowable Discharge Temperature

The maximum allowable discharge temperature is 350 °F (177 °C ) for lubricated cylinder applications, lower limits apply to non-lube and low gas molecular weight applications. The discharge temperature calculated by current version of the Ariel Reciprocating Performance Program, is based on suction temperature plus cylinder pre-heat and internal compression ratio. The equation is as follows:

or for metric units

Where: TD = Discharge Temperature, °F or °C
TS = Suction Temperature, °F or °C
R = Compression Ratio , pressure discharge / pressure suction
k = Ratio of Specific Heats

High discharge gas temperature shutdowns should be set as close as practical to the operating temperature.

Ariel Corporation Application Manual
6 August 2002