Please answer all questions or leave for someone else to answer. A feedwater heater, operating in steady state, has 2 inlets and one outlet, at inlet 1 steam enters at a pressure of 5Mpa, a temperature of 275°C with a mass flow rate of 40kg/s. At input 2 it is liquid water at a pressure of 5Mpa at 40°C and through a surface of 25cm ^2, at output 3 there is a volumetric flow of 0.06m^3/sec. Determine: a) mass flow of input 2 and 3 b) speed at input 1 c) enthalpy at output 3 d) outlet temperature in 3 e) the quality value if any

The heat pump cycle shown in the figure below operates at steady state and provides energy by heat transfer at a rate of 15 kW to maintain a dwelling at 22°C when the outside temperature is Toutside 5°C. The manufacturer claims that the power input required for this operating condition is W cycle = 4 kW. 0 = i Is this cycle possible? Yes No QH = 15 kW bok and Modia Tinside = 22°C kW/K = Heat pump cycle Applying energy and entropy rate balances determine the rate of entropy production, in kW/K. Toutside W cycle

SU-1 A heat engine with &=0.400 operates between two heat reservoirs at 250K and 450K. The energy amounts and heat flow diagram for one cycle of operation of the engine is shown to the right. a) What is the change in entropy for the engine for one cycle of operation of the engine? b) Find the change in entropy for the engine surroundings for one cycle of operation of the engine. c) Find the change in entropy for the universe for one cycle of operation of the engine. d) Is this engine real, reversible, or impossible? Explain why using your results from the previous parts. Th-450K 500 200J Engne 300J T-250K

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