Concept/Short Answer #1 (10 points) 18 minutes! During hot summer days, a chille

Question

Concept/Short Answer #1 (10 points) 18 minutes! During hot summer days, a chiller using an air cooled condensing unit will operate at a lower thermodynamic etticiency in the refrigeration cycle than a chiller that uses a condenser water loop connected to a cooling tower, assuming all else remains the same (compressor efficiency drops, degrees of sub-cooling and superheating, total cooling capacity, etc.) List the two key factors or reasons associated with the refrigeration cycle that cause this to be true, and briefly describe the effect of each reason on why it causes a lower overall cycle efficiency Solution osea

Explanation / Answer

1) In hot summer generally air is humidified with high relative humidity, so use of air cooled system has a limit on maximum

Absorption of moisture because of high humidity and hence the minimum temperature achieved will not be as good as in closed loop water system. So air cooled system has lesser thermodynamic efficiency.

2) Because of water in closed loop, it has high heat transfer coefficient than water and hence cooling capacity will be more

So good referring effect than air cooled system.

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