How does a refrigeration plant work?

The refrigerant flows into the Compressor where it is compressed and pressurised. At this point, the refrigerant is a hot gas. The refrigerant is then pushed to the Condenser which turns the vapour into liquid and absorbs some of the heat. As the gas cools down the load, it absorbs the heat which turns it into a gas.

What are the 4 main components in a refrigeration system?

The 4 Main Refrigeration Cycle Components

• The compressor.
• The condenser.
• The expansion device.
• The evaporator.

How do you calculate refrigerant flow rate?

Refrigeration and Heat-Pump Systems

1. Refrigerant mass flow rate (kg/s) (9.6) r = Q e / h 1 − h 4.
2. Compressor isentropic power (kW) (9.8) r h 2 − h 1.
3. Heat rejected in condenser (kW) (9.9) h 2 − h 3.

What are the 7 main components of direct system of refrigeration?

The main components of a refrigeration system are the condenser, the compressor, the evaporator and the expansion valve.

• Condenser. Condensation changes gas to a liquid form.
• Compressor.
• Evaporator.
• Expansion Valve.

How do refrigeration compressors work?

In the first stage of the refrigeration cycle, refrigerant enters a compressor as a low-pressure vapor. The compressor compresses the refrigerant to a high-pressure vapor, causing it to become superheated. Once the refrigerant is compressed and heated, it leaves the compressor and enters the next stage of the cycle.

Which cycle is used in refrigeration?

vapor-compression refrigeration
The vapor-compression refrigeration is the most widely used cycle for refrigerators, air- conditioners, and heat pumps.

Which gas is used in refrigerator?

Modern refrigerators usually use a refrigerant called HFC-134a (1,1,1,2-Tetrafluoroethane), which does not deplete the ozone layer, unlike Freon. A R-134a is now becoming very uncommon in Europe. Newer refrigerants are being used instead.

What is a Ph diagram?

A p-h diagram is a figure with a vertical axis of absolute pressure and a horizontal axis of specific enthalpy. It is an important diagram used frequently for a performance calculation of a refrigerating machine. A p-h diagram is made respectively for a specified refrigerant.

What is refrigerant number of water?

Explanation: Water is having refrigerant number as R-118. Whereas, R-717, 744, 100 corresponds to Ammonia, Carbon dioxide, and ethyl chloride.

Which compressor is used in refrigeration plant?

Centrifugal compressors convert the kinetic energy of high-speed, low-pressure refrigerant. The result is low-speed high-pressure gas. Centrifugal compressors are suitable for large cooling applications. The centrifugal compressor is a favorite among commercial and industrial refrigeration systems.

What is the basic principle of refrigeration?

The absorption of the amount of heat necessary for the change of state from a liquid to a vapor by evaporation, and the release of that amount of heat necessary for the change of state from a vapor back to the liquid by condensation are the main principles of the refrigeration process, or cycle.

What are the different types of refrigeration plants?

rine system (sub-zero applications) Two principle types of refrigeration plants found in industrial use are: Vapour CompressionRefrigeration (VCR) and Vapour Absorption Refrigeration (VAR). VCR uses mechanical ener-gy as the driving force for refrigeration, while VAR uses thermal energy as the driving force forrefrigeration.

How is the capacity of a refrigeration plant calculated?

The capacity is expressed as ton of refrigeration which is equivalent to 12600 kJ/h (3000 kcal/h) heat removed by the plant from the evaporator. The refrigeration load of chillers, pasteurizers, cold storages etc. is calculated to arrive at the total cooling requirement of the plant.

What are the refrigerant properties tables and charts?

The refrigerant properties tables and charts are used to determine theoretical refrigerating effect, work of compression and co- efficient of performance (C.O.P.) of the refrigeration system operating under different conditions.

What is the working principle of refrigeration system?

www.AgriMoon.Com the heat from the materials to be cooled (air/water/milk/any other material). The refrigerant takes up its latent heat from the load and becomes vapour. The refrigerant vapour produced in the evaporator is pumped by the compressor and low pressure is maintained to maintained low evaporating temperature.