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What is the comparison between refrigerant and temperature and pressure

Update:09-09-2020
Summary:

What is the comparison between refrigerant and temperat […]

What is the comparison between refrigerant and temperature and pressure

Low pressure and high temperature refrigerant: The R410 refrigerant tube evaporation temperature is higher than 0℃, and the condensation pressure is lower than 29.41995×104Pa. This type of refrigerant is suitable for centrifugal refrigeration compressors of air conditioning systems.

R12, R134, R410 refrigerant and liquid tricolor tube

Medium pressure and medium temperature refrigerant: evaporating temperature -50 ~ 0℃, condensing pressure (196.113 ~ 29.41995) × 104Pa. This type of refrigerant is generally used in common single-stage compression and two-stage compression piston refrigeration systems.

High-pressure low-temperature refrigerant: the evaporation temperature is lower than -50°C, and the condensation pressure is higher than 196.133×104Pa. This kind of refrigerant is suitable for the low temperature part of cascade refrigeration equipment or low temperature equipment below -70℃.

There are many refrigerants on the market. The editor of Refrigeration Encyclopedia now summarizes the characteristics of commonly used refrigerants and temperature and pressure gauges.

R22 refrigerant:

R22 refrigerant also belongs to Freon refrigerant, the chemical name is difluorochloromethane, and the chemical formula is CHF2Cl. It is a medium pressure and medium temperature refrigerant with a boiling point temperature of -40.8°C, a freezing point of -160°C, a critical temperature of 96°C, and a critical pressure of 4.974MPa. R22 does not burn or explode, has low toxicity, but has strong penetrating ability, and leakage is difficult to find.

The unit volume of R22 is similar to that of ammonia refrigerant. R22 can pass through two-stage compression or air conditioning refrigeration system, the lowest temperature can reach -80℃, but it is not economical.

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