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Steam enters a heat exchanger operating at steady state at 250 kPa and a quality of 90% and exits as saturated liquid at the same pressure. A separate stream of oil with a mass flow rate of 29 kg/s enters at 20C and exits at 100C with no significant change in pressure. The specific heat of the oil is c = 2:0/kJkg K. Kinetic and potential energy efects are negligible. If heat transfer from the heat exchanger to its surroundings is 10% of the energy required to increase the temperature of the oil, determine the steam mass flow rate, in kg/s.
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initially an insulated rigid tank contains 2.01 kg of water at 277.7oc and 1 mpa. a heater in the wall of the tank
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For the process where q= 62.5 kj/kg and wkcs= 60 kj/kg determine the energy change if the system mass is 2 kg.
steam at 1 bar enters an adiabatic heat exchanger with a quality of 0.896 and exits as a saturated liquid. the steam is
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