9 A 9 5 Tonnes Capacity Of Ammonia Refrigerator Operates Between Evaporator And Condenser Temperature Of 13 C And 28 C 1 (55.37 KiB) Viewed 39 times
A 9.5 tonnes capacity of ammonia refrigerator operates between evaporator and condenser temperature of -13°C and 28°C is needed in a food storage locker. The refrigerant is sub-cooled by 4°C before entering the expansion valve. The vapour is 0.90 dry as it leaves the evaporator coil. The compression in the compressor is adiabatic type.
Using p-h chart find
(i) Condition of vapour at outlet of the compressor
ii) Condition of vapour at entrance to evaporator
(iii) C.O.P.
(iv) Power required in kW
Neglect valve throttling and clearance effect.
9. A 9.5 tonnes capacity of ammonia refrigerator operates between evaporator and condenser temperature of -13°C and 28°C is needed in a food storage locker. The refrigerant is sub-cooled by 4°C before entering the expansion valve. The vapour is 0.90 dry as it leaves the evaporator coil. The compression in the compressor is adiabatic type. Using p-h chart find (i) Condition of vapour at outlet of the compressor (ii) Condition of vapour at entrance to evaporator (iii) C.O.P. (iv) Power required in kW Neglect valve throttling and clearance effect.
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