A. COP of a Carnot refrigeration cycle is greater than (a) vapour compression cycle (b) reversed Brayton cycle ( c) vapour absorption cycle ( d) all the above B. In an ideal vapour compression refrigeration cycle, which process is irreversible? (a) Compression (b) Heat rejection (c) Throttling (d) Heat absorption C. Subcooling of refrigerant in vapour compression refrigeration cycle (a) decreases COP (b) increases COP ( c) decrease refrigerating effect (d) increases work input D. Superheating of vapour refrigerant at evaporator in vapour compression cycle (a) decreases COP (b)
A. COP of a Carnot refrigeration cycle is greater than (a) vapour compression cycle (b) reversed Brayton cycle ( c) vapour absorption cycle ( d) all the above B. In an ideal vapour compression refrigeration cycle, which process is irreversible? (a) Compression (b) Heat rejection (c) Throttling (d) Heat absorption C. Subcooling of refrigerant in vapour compression refrigeration cycle (a) decreases COP (b) increases COP ( c) decrease refrigerating effect (d) increases work input D. Superheating of vapour refrigerant at evaporator in vapour compression cycle (a) decreases COP (b) increases COP ( c) decrease refrigerating effect (d) increases work input E. Heat is absorbed by a refrigerant during a refrigerant cycle (a) condenser ( c) evaporator (b) throttle valve (d) compressor
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