విద్యా దదాతి వినయం

UNIT-5 Compressors:  Classification –positive displacement and roto-dynamic machinery – Power producing and power absorbing machines, fan, blower and compressor – positive displacement and dynamic types – reciprocating and rotary types. Reciprocating: Principle of operation, work required, Iso-thermal efficiency, volumetric efficiency and effect of clearance, multi stage compression, under cooling, saving of work, minimum work condition for two stage compression. Classification of Compressors : Positive Displacement Type : In this type of compressors,  air is physically trapped between to relatively moving components and forced to occupy lower volume,  thereby increasing its pressure.  Most notable example would be, a reciprocating compressor. In which air is trapped between piston and cylinder volume and then literally pressed to increase its pressure. Another point of interest is the output of these pumps. Since constant volume is being ...