Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning - Discussion
Discussion Forum : Heat Transfer, Refrigeration and Air Conditioning - Section 8 (Q.No. 5)
5.
The lowest temperature during the cycle in a vapour compression system occurs after
Discussion:
25 comments Page 2 of 3.
Bhavi said:
8 years ago
It's after expansion.
Nikunj Miyani said:
8 years ago
Both B and D answers are right. Because in evaporation, Refrigerant Absorbs latent heat at constant pressure. Only state changes, not temperature.
Deepak rathva said:
7 years ago
After expansion is right.
But evaporation is also done at constant temperature in VCR.
So, the Answer is 1. After expansion & 2. During evaporation.
But evaporation is also done at constant temperature in VCR.
So, the Answer is 1. After expansion & 2. During evaporation.
Sohel said:
7 years ago
D is right because in evaporator latent heat is transfer so the temperature remains same only phase change occurs.
Jigs said:
7 years ago
Yes, you are right @Nikunj Miyani.
Kishan Gohil said:
6 years ago
Lowest temperature during the cycle in a vapour compression system occurs after condensation or throttling.
Arun said:
6 years ago
After"Expansion" Low temperature occurs.
After"evaporation " Low temperature to normal temperature because of heat addition occur during evaporation. So, answer is option (A).
After"evaporation " Low temperature to normal temperature because of heat addition occur during evaporation. So, answer is option (A).
Ankit Kumar said:
6 years ago
Yes, the temperature is constant during evaporation but within the dome, when constant pressure line crosses the dome then he goes in the superheated region and here temp is not constant, so the most appropriate answer is after expansion.
Rajesh Roy said:
6 years ago
A/c to T-S diagram, lowest temperature should be after expansion or throttling.
Mara said:
5 years ago
After expansion, before entering to evaporator the ref temp may go down to -15 deg. C.
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