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.
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. 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.
When the piston moves back upwards, the inlet valve closes, and the volume of space in the cylinder decreases, compressing the refrigerant. Once the refrigerant is sufficiently compressed, the necessary amount of force to open a discharge valve is achieved, and the refrigerant is expelled, allowing the cycle to repeat. Reciprocating compressors are highly scalable, allowing them to be designed to a small capacity or a high capacity of hundreds of tons.
The main detractors to reciprocating compressors are that they are very loud, have a high amount of vibration, and are inefficient. Located near Seattle, Washington, Process Solutions has over 30 years of experience providing high-quality control systems. Skip to content Request a Quote Sales: Centrifugal Centrifugal compressors, also known as turbo or radial compressors, pressurize a refrigerant by forcing the refrigerant through a rotating impeller.
Rotary-Vane Rotary Vane compressors utilize a rotating drive shaft positioned eccentrically within a cylindrical housing that contains fixed inlet and discharge ports. Rotary-Screw Rotary screw compressors contain two meshed male and female rotors that rotate together in opposite directions.
Rotary-Scroll Rotary scroll compressors contain two intermeshing spirals or scrolls with one spiral being fixed while the second orbits within it. Clearly, if the outside temperature is very hot i. Moran, Michael J. Langley, Billy C. Detail of Compressor Valve Function. Components of Compresion Refrigeration In A Dorm Refrigerator Condenser: The condenser removes heat given off during the liquefication of vaporized refrigerant.
Heat is given off as the temperature drops to condensation temperature. Then, more heat specifically the latent heat of condensation is released as the refrigerant liquefies.
There are air-cooled and water-cooled condensers, named for their condensing medium. The more popular is the air-cooled condenser. The condensers consist of tubes with external fins. The refrigerant is forced through the condenser. The metering device can be an expansion valve or a capillary tube and is used to create a pressure drop. As mentioned earlier, the temperature and boiling point of liquids decrease as the pressure decreases. Some refrigerant liquid vaporizes and the temperature of the liquid-gas mixture drops.
The cool refrigerant then flows to the evaporator. The evaporator is another heat exchanger that allows heat to move between the heat source and the refrigerant. In a chiller the heat source is the cooling fluid which flows into your equipment. The refrigerant enters the evaporator as a low temperature gas-liquid mixture.
By design the temperature of the heat source is always higher than the refrigerant's boiling point.
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