Question

The procedure for determining the presence of Non-Condensable Gasses in refrigerant contained in an external recovery tank utilizes the principle that noncondensable gases ____ the pressure of the refrigerant (compared to the saturation pressure).

Answer 1

Answer:

The procedure for determining the presence of non-condensable gases in refrigerant contained in an external recovery tank utilizes the principle that non-condensable gases increases the pressure of the refrigerant (compared to the saturation pressure).

Explanation:

The existence of non-condensable gases gives rise to an increase in the pressure of the refrigerant, this generates supplementary thermal resistance in the refrigeration circuit, which in turn decreases the efficiency of the system.

Answer 2

Answer:

The procedure for determining the presence of Non-Condensable Gasses in refrigerant contained in an external recovery tank utilizes the principle that noncondensable gases INCREASE the pressure of the refrigerant (compared to the saturation pressure).

Explanation:

When checking for non-condensables, it is required that all of the refrigerant should be pumped into a condensing coil. A rejection of the heat in the condenser results in making the air leaving the condenser to be the same temperature as the entering air. Immediately this happens, the pressure inside the condenser will correspond to saturation temperature which is equal to the outside air. If the pressure is too high(increased), this indicates non-condensables!