COMPRESSOR TEMPERATURE REQUIREMENTS

The first law of the thermodynamics is an expression of the principle of conservation of energy and states that energy cannot be created or destroyed but only transformed from one form to another. The motor is fed via power source; however, this power cannot be made use of as mechanical energy due to loss in the transmission line. The difference is transformed into the heat. The heat generated in the motor winding should be dissipated to protect the failure of the coils. The heat build-up is almost sole factor that may damage the coil winding, if physical effects like dust, etc. are eliminated.

The quantity of the heat generated in the motor depends on the load and motor efficiency. The higher the load the more is the electricity consumed. Portion of the power transformed into the heat depends on the efficiency of the motor and quantity of the heat accumulation.

The temperature level that a motor can resist mostly depends on the type of motor insulation and basic motor design; however, actual motor service life depends on the operational conditions of the motor. If the motor is operated under suitable conditions at its rated capacity, its service life will be extended, to the extent to its design. Excessive loading of the motor that will give rise to elevated operation temperature will adversely affect the motor’s service life.

The heat is the biggest enemy of the motor and therefore, the hermetic compressors are designed to dissipate the heat at the suction port. The motor is made accommodating the loads by improvement in the design of the hermetic compressors and monitoring the motor temperature effectively. In such case, it is possible to operate the motor at its rated capacity, let alone the safety factor that may be obtained against fluctuations in the downstream conditions.