Question

How is the COP of gas-refrigeration cycle compared with
the COP of vapour compression cycle, for the same
capacity?
a. none of the above
b. the COP of gas-refrigeration cycle is higher than
the COP of vapour compression cycle, for the same
capacity
c. the COP of gas-refrigeration cycle is same as the
COP of vapour compression cycle
d. the COP of gas-refrigeration cycle is lower than the
COP of vapour compression cycle, for the same
capacity​

Answer 1

Answer:

the COP of gas-refrigeration cycle is higher than the COP of vapour compression cycle, for the same capacity c. the COP of gas-refrigeration cycle is same as the COP of vapour compression cycle d. none of the above It readily evaporates and condenses or changes alternatively between the vapor and liquid phase without .

Hope this helps you

Explanation:

Answer 2

Therefore the COP of the gas-refrigeration cycle is lower than the vapor compression cycle for the same Refrigeration Capacity. ( Option-d )

Given:

COP of the gas-refrigeration cycle and COP of the vapor compression cycle is given.

Refrigeration Effect or Refrigeration Capacity is equal for both cycles.

To Find:

The COP of the gas-refrigeration cycle should be compared with the COP of the vapor compression cycle.

Solution:

The given question can be solved by using the below-shown approach.

Coefficient of Performance for any Refrigeration cycle is given by,

⇒ COP = ( Refrigeration Effect ) / ( Work input )

As Refrigeration Effect is the same for both cycles,

⇒ COP ∝ 1 / ( Work Input )

Hence the cycle with less Work input should have high COP.

For the same Refrigeration Effect,

⇒ Work input for Vapor Compression cycle < Work input for the gas-refrigeration cycle.

Hence, the COP of the Vapor compression cycle is greater than the COP of the gas-refrigeration cycle.

Therefore the COP of the gas-refrigeration cycle is lower than the vapor compression cycle for the same Refrigeration Capacity.

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