HOT COLD HOT COLD The Ideal Vapor-Compression Refrigeration Cycle 1-2 Isentropic compression in a compressor 2-3 Constant-pressure heat rejection in.

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Presentation transcript:

HOT COLD HOT COLD

The Ideal Vapor-Compression Refrigeration Cycle 1-2 Isentropic compression in a compressor 2-3 Constant-pressure heat rejection in a condenser 3-4 Throttling in an expansion device 4-1 Constant-pressure heat absorption in an evaporator h-constant s-constant P-constant

Actual Vapor-Compression Refrigeration Cycle

1. Effect of Sub-cooling the Refrigerant Improving the efficiency

2. Effect of Superheating the Refrigerant

3. Cascade Refrigeration Systems

4. Multistage Compression Refrigeration Systems

Air Refrigeration cycle

1.

State 1: Saturated Vapor State 2: State 3: Saturated Liquid State 4:

Rate of Heat Removal Rate of Heat Rejection Coefficient of Performance ANS.

2.

State 1: Saturated Vapor State 2: Superheated State 3: Saturated Liquid State 4:

State 5: Saturated Vapor State 6: State 7: Saturated Liquid State 8: Superheated

ANS

3.

4.

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