A large manufacturer of air compressors is developing an air-cooled piston model and a water-cooled piston model, each having a diameter of 5 inches. The prototype was harnessed to a pressure gauge and the following readings were taken during the compression stroke. For each model, find the polytropic index, n, of this process and calculate the non-flow work done. Which of the prototype designs will be more efficient?

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Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.