Refrigeration Compressor Technology


Refrigeration Compressor Technology

     Refrigeration Compressors are used for refrigeration, heat pumping, and air conditioning. These are typically large mechanical units that are designed for industrial use in high volume applications.

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How Does A Refrigeration Compressor Work?

     A Refrigeration Compressor draws refrigerant from the evaporator at a relatively low pressure, compresses it and then discharges it to the condenser where it is cooled. The refrigerant then moves to the expansion valve and the evaporator before being compressed again.

Types of Refrigeration Compressors

  1. Reciprocating Compressors (Piston Compressors)

Magnetic Level Gauge

     These are one of the most widely used technologies for commercial and industrial applications. They feature a piston and cylinder arrangement like the automotive engine. The refrigerant inside the cylinder gets compressed by the reciprocating motion of the piston. These compressors are capable of compressing gases to high pressures and support continuous operation. There are three types of reciprocating compressors: hermetically sealed, semi-hermetically sealed and open type.

2. Screw Compressors

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     These compressors have a pair of meshing screws in between them where the refrigerant gets compressed. They can produce high pressure for a small quantity of gas. They pass refrigerant vapour through screw spindles which compress the gas.

3. Scroll Compressors

     This technology comprises two interleaved scrolls. One of these scrolls is fixed and the other orbits eccentrically without rotating. The refrigerant is then compressed in the small gaps which are created during its motion. These compressors are widely in use as they have a relatively low rate of leakage and provide high efficiency.

4. Rotary Compressors

     Rotary Compressors feature two rotating elements, like gears, between which the refrigerant is compressed. These compressors can pump the refrigerant to lower or moderate condensing pressures and thus are able to handle small volumes of gas and produce lesser pressure.

5. Centrifugal Compressors

     These compressors possess impellers or the blowers that can handle large quantities of gas.

How do I select the right Refrigeration Compressor?

     The correct specification of refrigeration compressors requires a thorough analysis of refrigerant options and nominal cooling specifications. Capacity, input power, condensing temperature, and evaporative temperature are the four basic nominal cooling specifications that should be considered.

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     The capacity of a refrigerant compressor measures its ability to remove heat from the refrigerant gas. In most cases, you would find that nominal capacity ratings are based on a standard set of conditions, including condensing temperature (CT), evaporative temperature (ET), refrigerant, and motor revolutions per minute (rpm).

      The purchase decision would also depend on the power source specifications of these compressors including voltage, frequency and phase.

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