Table of Contents
- 1 Why does both the compression cycle have a high pressure side?
- 2 Why do Compressors increase pressure?
- 3 Which basic system component is connected to both the high pressure and the low pressure side of the refrigeration system?
- 4 Which two components in a compression refrigeration system maintain the pressure difference in the system?
- 5 How does a compressor increase temperature?
Why does both the compression cycle have a high pressure side?
The high side pressure allows the refrigerant to condense at a temperature higher than the outdoor temperature, releasing heat. List the four major components of the compression refrigeration cycle in order. It moves the heat from inside the house to outside the house.
Why do Compressors increase pressure?
When we compress air, we force those molecules closer together. The same molecules are in the air, but they occupy less space (volume) than they did when the molecules were free. And as the density increases, the pressure of air increases and… voila!
Does a compressor increase temperature of refrigerant?
Like anything that is put under pressure, the increased pressure from the compressor causes the temperature of the refrigerant to rise. As it leaves the compressor, the refrigerant is a hot vapor, roughly 120° to 140°F.
What causes high pressure in refrigeration?
One common cause of high discharge pressure is the cooling medium (air or water) flowing across the condenser: either there is not enough or the temperature of the cooling medium is too high. This is normally easy to identify with a simple visual inspection of the condenser.
Which basic system component is connected to both the high pressure and the low pressure side of the refrigeration system?
In an evaporator, flash gas occurs from the pressure drop between the high side and low side of the system. This pressure drop allows flash gas to absorb heat, which helps to cool the rest of the liquid refrigerant.
Which two components in a compression refrigeration system maintain the pressure difference in the system?
To maintain the difference in pressure between the condenser and the evaporator caused by the compressor, an expansion valve is needed in the cycle. The expansion valve separates the high-pressure part of the system from the low-pressure part. Only a small trickle of refrigerant liquid flows through the valve.
How does pressure affect compressor?
A refrigeration system’s pressures can dictate how much refrigerant will flow through the system. If the pressure of the suction line that delivers refrigerant gas to the compressor cylinders is high, the density of refrigerant vapors will be high and the mass flow rate of refrigerant will be high.
What is high pressure and low pressure in compressor?
Most 2 stage reciprocating compressors are designed to operate up to a maximum of 175 psi. Most rotary screw compressors are designed to operate efficiently between 90 and 125 psi. Some applications require high volumes of compressed air in the range of 45 to 60 psi.
How does a compressor increase temperature?
If you compress a gas adiabatically (without allowing heat to enter or leave) you are doing Work on the gas. That increases its internal energy. The temperature is a measure of the internal energy (kinetic energy of the molecules for an ideal gas). Thus, compression increases temperature.