Question

Two reversible refrigerator (a) and (b) are arranged in series , the COP of (a) is 3 and COP of (b) is 4 . The COP of complete refrigerator system is *​

Answer 1

Step-by-step explanation:

Given Two reversible refrigerator (a) and (b) are arranged in series , the COP of (a) is 3 and COP of (b) is 4 . The COP of composite refrigerator system is

• So Coefficient of performance (COP) is the ratio of desired effect to external work contributed to get the desired effect.
• So COP = Desired effect / work supplied.
• So COP of composite refrigerator = (COP)a x (COP)b / 1 + (COP)a + (COP)b
•                                                              = 3 x 4 / 1 + 3 + 4
•                                                              = 12 / 8
•                                                                = 3/2
•                                                               = 1.5

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