Another new category is that of refrigerant blends, usually referred to as "azeotropic and isotropic." The use of blends of refrigerants growing. Azeotropic mixture does not change or separate tracks when used in cooling systems. Zeotropic refrigerants also a mixture of different refrigerants. When used in the cooling system, body composition and saturation temperature change.
Requirements to Refrigerants
Liquid used as a refrigerant must have certain properties:
It must be corrosion.
It must be non-combustible.
It should do the leaks are easy to detect and localize.
It should work under low pressure (low boiling point).
It should be stable gas.
This should allow the refrigerator or compressor parts, moving in a fluid to be easily lubricated
She should have a high volume of fluid per pound, to ensure a durable refrigerant management.
She should have a high latent heat per pound to make a good cooling effect per pound pair pumped.
He must have a low amount of steam per pound.
This will reduce the volume needed.
It should have as little pressure difference between suction pressure and condensing pressure. This increases the efficiency of the pump.
It should meet the requirements of all applicable EPA regulations.
Normal pressure in the cooling system should be as close to atmospheric pressure as possible. Excessive differences may result in water leakage, fatigue compressor, and reduces the effectiveness of the valves.
Standard comparison of refrigerants used in the refrigeration industry, is based on specific temperatures of evaporation and condensation. Evaporating temperature 5F (-15) and condensing temperature 86F (30C). In this Chapter, each refrigerant discussed compared on the basis of...
Refrigerants