Part 2 – Vapour Compression Refrigeration Systems
Vapour Compression Refrigeration Systems belong to the general class of vapour cycles. The working fluid (refrigerant) undergoes phase change at least during one process. Refrigeration is obtained as the refrigerant evaporates at low temperatures.
The input to the system is in the form of mechanical energy required to run the compressor. This is also called Mechanical Refrigeration systems. This is the most commonly used among all refrigeration systems.
Activity: Refrigeration Systems
Click on the “+” icons to view the labels of a Refrigeration System.
A closed-compression system consists of four essential parts:
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- A compressor
- A condenser and receiver
- An evaporator or cooling tank
- Connecting pipes and a regulating valve
Let’s take a look at some of the parts in more detail.
Evaporator
Where the circulating refrigerant absorbs heat from the transfer medium. That heat is rejected in the condenser.
Cooling Water
Economy of the plant depends to a great extent upon the temperature of the cooling water circulated through the condenser. Examples are cooling towers which operate direct from and back to source.