A coal with a higher heating value of 6,700 Kcal/kg is consumed at a rate of 600 kg/hr. in a water tube steam generator with a rated boiler horsepower of 200 HP. The feedwater temperature is 82°C and steam generated is at 11 kg/cm2 absolute, saturated. The developed boiler horsepower is equivalent to 305 HP. Determine: a. Heating surface area in m² b. Steam evaporated in kg/hr c. ASME evaporating units in J/hr

Required information Refrigerant-134a enters the condenser of a steady-flow Carnot refrigerator as a saturated vapor at 65.0 psia, and it leaves with a quality of 0.05. The heat absorption from the refrigerated space takes place at a pressure of 30 psia. Determine the net work input. (Round the final answer to three decimal places.) The net work input is Btu/lbm.

Consider a cogeneration steam power plant that operates on a reheat Rankine cycle as shown in Figure 1. Meanwhile Figure 2 shows the T – s diagram of the plant. The plant is able to produce turbines power output of 8500 kW and supplies 3000 kW of process heat. Two units of turbines have been used in the plant namely high-pressure and low-pressure turbines. Superheated steam enters the high-pressure turbine at 8 MPa, 400 °C and the low-pressure turbine at 1.4 MPa, 400 °C of pressure and temperature, respectively. The steam is extracted at the end of the high pressure turbine to be used in process heater and leaves the process heater as saturated liquid then enters the mixing chamber. The remaining of steam from the high-pressure turbine is reheated to 400 °C and the steam leaves the condenser as a saturated liquid of 10 kPa. The isentropic efficiency of the turbines and pump are neglected in analyzing the system performance. Determine: a) The quality of steam at the turbines exit. b)…

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