Effect of Engine Oil in the Aftercooler of a 2HA4TERS Horizontally Balanced Opposed Air Compressor
Authors: N.B. Sigimon, Jose K Jacob, A. Surendran
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Thermal designing of an aftercooler typically includes the determination of heat transfer area ,number of tubes, tube length and tube diameter ,tube layout, number of shell and tube passes ,tube pitch, number of baffles, its type and size. CFD model of the after cooler had been developed and it is validated. Unexpected heat is generated at the after cooler of a 2HA4TERS, horizontally balanced opposed air compressor. This causes overheating and burning of the after cooler. This paper aims to determine the effect of variation in oil discharge in to the cylinder of the compressor by analyzing the CFD model of the after cooler. LMTD, Heat flow Q, Weight flow W, Clearance between the tubes C1,Baffle space B, Flow area a, Mass velocity G, Average temperature of the cold fluid ta, Average temperature of the hot fluid Ta, Reynolds number for heat transfer Re, Heat transfer coefficient in general h, for inside fluid hi, and for out side fluid ho, Value of hi when referred to the tube outside diameter hio, Clean overall coefficient of heat transfer Uc, Design overall heat transfer coefficient Ud and dirt factor Rd are determined by using Kerns method.