Category: Advance Concept Mechanical Eng

Figure 10.5 Reciprocating Compressor with Clearance Volume

In isothermal compression work done is minimum and it is maximum for adiabatic compression.

Area 0−1−2−3 in Figure 10.4 represents the net work done, when the compression follows the polytropic law. Net work on air per cycle = Area 0−1−2−3 = Work done during compression (1−2) + Work done during air delivery (2−3) − Work done during suction (0−1). Similarly, for isentropic compression

In these compressors, the gas volume decreases and pressure increases due to the action of one or more reciprocating piston moving axially in one or more cylinders. It may be single acting or double acting, single cylinder or multicylinder and single stage or multistage compressors. Figure 10.2 shows the schematic of a reciprocating compressor. Reciprocating compressors… Continue reading RECIPROCATING COMPRESSORS

Compressors can be classified on the basis of range of pressures, capacity, pressure ratio and design, and principle of operations. Figure 10.1 Classification of Compressors Positive Displacement Compressor: In this compressor, pressure is raised by decreasing the volume of gas, i.e., positive displacement of gas. Dynamic Compressor: In this compressor, the kinetic energy imparted to the gas by… Continue reading CLASSIFICATION OF COMPRESSORS

The function of compressor is to compress the gases and vapours from low pressure to high pressure. According to second law of thermodynamics this is only possible when work is done on the system, i.e., on the gas or vapour. Compressors have wide industrial and domestic applications such as compression of refrigerants in refrigerators and… Continue reading INTRODUCTION