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A surface condenser deals with 5400kg/h steam of dryness fraction 0,8. The vacuum gauge reading is 660 mmHg and that of the barometer is 0,97 atmosphere. Air leakage is estimated to be 0,9 kg/1000kg exhaust steam entering the condenser. The temperature of the condensate and that of the air pump suction pipe are each 39°C. Cooling water enters the condenser at 18°C and leaves it at 41°C.