Which refrigerant line is high pressure?
Discharge Line
The high pressure refrigerant flows to the condenser by way of the “Discharge Line”. The condenser changes the high pressure refrigerant from a high temperature vapor to a low temperature, high pressure liquid and leaves through the “Liquid Line”.
Can coefficient of performance be greater than 1?
COP of refriegeration is always greater than one. The coefficient of performance (COP) of refrigeration is always more than 1. Hence option (a) is correct. COP is the ratio of heat extracted from the refrigerator to the work done on the refrigerant.
What happens when A TXV has a restricted liquid line?
This is simply not the case, especially on a TXV/receiver system. A restricted liquid line will starve the evaporator of refrigerant, causing low evaporator pressures. With a starved evaporator, the compressor and condenser will also be starved. This will cause both the condenser and evaporator pressures to be lowered.
Which is the correct pressure drop for line sizing?
These line sizing charts are based on a suction pressure drop equivalent to a 2°F change in saturation pressure and liquid line pressure drop of 5 psi. For R-404A Low Temperature 1 psi; for R-404A and R-22 Medium Temperature 2 psi is used. This is the maximum allowable pressure drop for the entire piping run regardless if it is 50′ or 250′.
Why does my compressor have a restricted liquid line?
The compressor is trying to draw refrigerant from the evaporator through the suction line, but the liquid line restriction is preventing refrigerant from entering the evaporator. This will cause the compressor to put the evaporator in a low pressure situation. Low condensing pressures.
What causes low evaporator pressure when liquid line is restricted?
SYMPTOMS. Low evaporator pressures. The low evaporator pressure is caused by the compressor being starved of refrigerant. The compressor is trying to draw refrigerant from the evaporator through the suction line, but the liquid line restriction is preventing refrigerant from entering the evaporator.
This is simply not the case, especially on a TXV/receiver system. A restricted liquid line will starve the evaporator of refrigerant, causing low evaporator pressures. With a starved evaporator, the compressor and condenser will also be starved. This will cause both the condenser and evaporator pressures to be lowered.
The compressor is trying to draw refrigerant from the evaporator through the suction line, but the liquid line restriction is preventing refrigerant from entering the evaporator. This will cause the compressor to put the evaporator in a low pressure situation. Low condensing pressures.
SYMPTOMS. Low evaporator pressures. The low evaporator pressure is caused by the compressor being starved of refrigerant. The compressor is trying to draw refrigerant from the evaporator through the suction line, but the liquid line restriction is preventing refrigerant from entering the evaporator.
Why does a restricted liquid line have subcool flow?
Since the condenser is being starved, it is not condensing much vapor to liquid. All of the liquid in the condenser will probably sit there for a while and subcool because of the low refrigerant flow caused by the restriction. This receiver will have a reduced flow in and out of it.