What is the evaporation pressure and condensation pressure of a refrigerant?

The evaporation pressure is when the refrigerant.

The maximum pressure from liquid to gaseous at a constant temperature. The condensing pressure is the minimum pressure from gaseous to liquid when the temperature of the refrigerant is constant.

Evaporation temperature. It is the refrigerant pressure that changes from liquid to gaseous when the pressure is constant.

Minimum temperature. When the refrigerant pressure is constant, when.

Gas pressure. When it becomes liquid, the condensation temperature.

It is the highest temperature.

For refrigerants, the evaporation temperature and condensation temperature are fixed at a certain pressure. The evaporation pressure and condensation pressure are fixed at a certain temperature.

At. Refrigeration equipment.

Medium: Create an environment where the refrigerant can evaporate (evaporation section) and an environment where the refrigerant can be condensed (compression section). compressors and.

Throttle. A corresponding pressure environment can be generated, but successful evaporation and condensation depend on the specific pressure and temperature.

Extended Materials. Evaporation pressure should be high:

The evaporation temperature will vary with the application temperature, for example.

Water chiller. The evaporation temperature is about 0 5 in the freezer.

The evaporation temperature of the main unit is about -20

30, the evaporation temperature of the household air conditioner is about 5 10.

The lower the evaporation temperature, the lower the evaporation pressure.

Refrigerant. The evaporation pressure is less than .

Atmospheric pressure. , it is easy for air to enter the system, and it is difficult to deal with the system, so it is hoped that the evaporation pressure of the refrigerant can be higher than the atmospheric pressure when the refrigerant evaporates at low temperature.

Low condensing pressure means that the refrigerant can be liquefied at a lower pressure, and the compression ratio of the compressor.

Small, which can save the horsepower of the compressor.

Condensing pressure regulating valves.

structure, below is the inlet, horizontal pipe.

For the exit, there is above.

Compression springs. Combined.

Bellows. Sealed with adjusting screws on the top to adjust the compressive force of the spring. The spring presses.

Spool. Pressure the spool toward the valve seat. by condenser.

The pressure of the incoming high-pressure liquid opens the spool to maintain a certain opening so that the condenser maintains the set pressure.

When the condenser is affected by the decrease in ambient temperature and the condensing pressure drops, the spring force.

Place the spool. Close small.

Reduces its flow so that the condensation pressure is maintained.

setpoint. When the condensing pressure is higher than the set value, the spring force is less than the condensing pressure, and the valve spool is enlarged to maintain the original pressure.

Evaporation pressure is the pressure at which the refrigerant changes from a high-pressure liquid to a low-pressure vapor.

The condensing pressure is the pressure of the liquid when the refrigerant changes from a low-pressure vapor to a high pressure.

The evaporation temperature is the lowest temperature at which a high-pressure liquid becomes a low-pressure vapor.

The condensing temperature is the highest temperature at which a low-pressure vapor becomes a high-pressure liquid.

For a refrigerant, these four values are fixed at a certain pressure.

Evaporation pressure and condensation pressure mean that the evaporation pressure refers to the refrigerant, respectively.

The pressure at which the heat of the cold stuff is absorbed and boiled in the evaporator, and the condensing pressure refers to the refrigerant in the condenser.

The pressure of the gas is closed when it is cooled into liquid or accompanying.

Refrigerant temperature and pressure should refer to the condensing temperature and condensing pressure.

The condensing temperature and the condensing pressure are directly proportional, and the condensing pressure and the condensing temperature correspond to each other。As shown in the figure below:

The lower the condensing pressure (high pressure), the lower the condensing temperature;

The higher the condensing pressure (high pressure), the higher the condensing temperature.

Introduction to refrigerant condensing temperature

Refers to the saturation temperature at which the refrigerant vapor in the condenser condenses at a certain pressure. The condensing temperature is not equal to the temperature of the cooling medium, and there is also a heat transfer temperature difference between the two.

Refrigerant condensation pressure

The introduction is that the refrigerant has the pressure of gas condensing into liquid in the condenser, because the pressure inside the condenser in the refrigeration system cannot be measured, and in fact, the pressure drop of the refrigerant in the exhaust pipe and the condenser is actually very small, so regardless of the design, commissioning or maintenance, it is generally believed that the exhaust pressure is approximately equal to the condensing pressure.

The gaseous refrigerant at low temperature and low pressure is compressed into superheated refrigerant vapor at high temperature and high pressure, and the pressure at this time is called evaporation pressure. Through the pipeline into the ridge belt into the condenser, cooling and condensation into a high-pressure liquid refrigerant, at this time through the expansion valve into the evaporator, and then the evaporation process absorbs the heat of the compressed air and becomes a gaseous refrigerant, back to the compressor inlet, the pressure collapse is called condensation pressure.

The pressure after endothermic evaporation of the low-temperature refrigerant after throttling and decompressionIt becomes a high-temperature and high-pressure gas after compression, and is liquefied by exothermic condensation, at this time the pressure and condensation pressure typical refrigeration cycle will go through four processes: compression, condensation, throttling and evaporation, in which the condensation and evaporation processes will involve heat exchange.

In this process, the state of the refrigerant changes, and the pressure is one of the indicators to evaluate this change. There is a difference between condensation pressure and evaporation pressure. Generally, there will be two pressure indications on the refrigeration dryer.

When the condensing pressure decreases and the evaporation pressure remains the same, the refrigeration capacity will increase. This is because according to the actual thermal efficiency principle of the refrigeration cycle, the cooling capacity is proportional to the difference between the evaporation temperature, which in turn is directly related to the evaporation pressure return to the cleaning force. Therefore, the cooling capacity will increase as the condensation pressure decreases, which also means that the efficiency of the refrigeration cycle before the leakage is improved, resulting in better cooling results.

Summary. The relationship between evaporation temperature and evaporation pressure 1, evaporation temperature and evaporation pressure The evaporation temperature is the temperature at which the liquid refrigerant boils. The actual use of the refrigeration system, due to different uses, the evaporation temperature is different, but the evaporation temperature of the refrigerant must be lower than the minimum temperature required by the cooled material, so that there is a certain temperature difference between the refrigerant and the cooled material in the evaporator, so as to ensure the driving force required for heat transfer.

In this way, when the refrigerant evaporates, it can absorb heat from the cold material and achieve low-temperature heat transfer. The pressure corresponding to the evaporation temperature is the evaporation pressure.

Hello, we are happy to answer for you: The condensing pressure will be reduced and the evaporation pressure will not change, and the refrigeration capacity will be reduced.

Evaporation pressure and condensation pressure have a great influence on the refrigeration system: the condensation pressure remains unchanged, the evaporation pressure rises, and the system COP rises; The steaming pressure remains unchanged, the condensation pressure decreases, and the system COP increases.

The relationship between evaporation temperature and evaporation pressure 1, evaporation temperature and evaporation pressure The evaporation temperature is the temperature at which the liquid refrigerant boils. The actual use of the refrigeration system, due to different uses, the evaporation temperature is different, but the evaporation temperature of the refrigerant must be lower than the minimum temperature required by the cooled material, so that there is a certain temperature difference between the refrigerant in the evaporator and the cold material Xiaosen material, so as to ensure the driving force required for heat transfer. In this way, when the refrigerant is evaporated, it can absorb heat from the cold material, and the physical object can be transported to low temperature heat transfer.

The pressure corresponding to the evaporation temperature is the evaporation pressure.

2. The relationship between evaporation temperature and evaporation pressure The lower the evaporation pressure, the lower the evaporation temperature, if the evaporation temperature of the system is continuously reduced, the refrigeration capacity of the refrigeration compressor will continue to decrease, and the refrigeration speed is not necessarily faster, and the lower the evaporation temperature, the lower the refrigeration coefficient of the tank travel system, and the load of the system is still increasing, so that the energy consumption of the system caused by the grinding ruler continues to increase, especially the low temperature system.

Answer. What is it?

The condensing pressure remains unchanged, and the refrigeration capacity will decrease when the evaporation pressure is increased.

Whether the cooling capacity decreases or does not change.

The condensing pressure is reduced.

The evaporation pressure is constant.

Dear, okay. The cooling capacity is reduced.

The evaporation temperature is the temperature at which the liquid refrigerant boils. The actual use of the refrigeration system, due to the different uses, the evaporation temperature is different, but the evaporation temperature of the refrigerant must be lower than the minimum temperature required by the cooled material, so that there is a certain temperature difference between the refrigerant and the cooled material in the evaporator, so as to ensure the driving force required for heat transfer. In this way, when the refrigerant evaporates, it can absorb heat from the cold material and achieve low-temperature heat transfer.

The evaporation temperature corresponds to the evaporation pressure.

The condensation dust and lead pressure carrying force remains unchanged, and the refrigeration capacity will be reduced when the evaporation pressure is increased. Repentance ().

a.That's right. b.Mistake.

Correct Answer: a

Under normal circumstances, the suction pressure is between the exhaust pressure.

We measure the pressure of the air conditioner unit, that is, the low pressure on the side of the thick pipe. If the ambient temperature is a little higher, the pressure should be a little higher, the ambient temperature should be a little lower, and the low pressure should be a little lower.

Empty forest late conditioning cooling and heating.