A thermostat is a device that controls the temperature of a system by turning it on or off. In a refrigerator, the thermostat regulates the…
Category: Refrigeration
Refrigerator Dry Expansion Circuit Schematic
Oil bleed and rectifier for R.22 flooded evaporator
Many of the new, alternative refrigerants are ‘blends’, which have two or three components, developed for existing and new plants as comparable alternatives to the…
It will be useful to remind ourselves of the requirements for a fluid used as a refrigerant. • A high density of suction gas •…
The passage of an electric current through junctions of dissimilar metals causes a fall in temperature at one junction and a rise at the other,…
Any gas, when compressed, rises in temperature. Conversely, if it is made to do work while expanding, the temperature will drop. Use is made of…
The low pressures (8–22 mbar) required to evaporate water as a refrigerant at 4–7°C for air-conditioning duty can be obtained with a steam ejector. High-pressure…
Vapour can be withdrawn from an evaporator by absorption (Figure 2.11) into a liquid. Two combinations are in use, the absorption of ammonia gas into…
Some volatile fluids are used once only, and then escape into the atmosphere. Two of these are in general use, carbon dioxide and nitrogen. Both…