What is the work of refrigerator?

Refrigerators work by causing the refrigerant circulating inside them to change from a liquid into a gas. This process, called evaporation, cools the surrounding area and produces the desired effect. When you release the contents into the lower pressure open space, it turns from a liquid to a gas.

What is the basic principle of refrigerator?

The main principle behind the refrigerator’s working is that a gas or a liquid changes its temperature when forced through a capillary tube or an expansion valve, separately kept in an insulated system where no external heat transfer occurs. Another principle comes to work in the refrigeration process.

Are bakery cases refrigerated?

Dry bakery cases are meant for baked goods that do not require refrigeration in order to remain fresh. Items such as donuts, cookies, bagels, muffins, and croissants do not require constant refrigeration to stay tasty and appealing to customers. Even some pies, cakes, and cupcakes don’t need to be refrigerated.

Which refrigerant is mostly used now a days in domestic refrigerator?

The refrigerant commonly used for domestic refrigerators is ammonia. Ammonia, frequently used commercially in large freezing and refrigeration plants is also called “anhydrous ammonia” because it contains almost no water (it is 99.98% pure).

How does a supermarket refrigeration rack system work?

This multi-compressor system is a popular supermarket refrigeration system. Parallel systems adjusts the compressor operation based on the refrigeration load. Increment of load results in increasing number of compressors operating. When load decreases compressor functioning is reduced.

What are the components of a refrigeration system?

Refrigeration system generally operates by the 4 major components namely compressor, condenser, expansion valve and evaporator. We use them all in a series to transport heat from low temperature zone to high temperature zone.

How does a parallel refrigeration rack system work?

Parallel Refrigeration Rack System This multi-compressor system is a popular supermarket refrigeration system. Parallel systems adjusts the compressor operation based on the refrigeration load. Increment of load results in increasing number of compressors operating.

When to use multiple compressors in a refrigeration rack?

Multiple compressor attached allow variable cooling instead of simple turning on and off. There are cases when refrigeration required is less or with time its requirement is decreased. In this case some of the compressors may be turned off while the other are kept in operation to vary refrigeration in evaporator coils.