Engineering, 29.01.2020 05:46 mariaaking1413
Asteam power plant operates on an ideal rankine cycle with two stages of reheat and has a net power output of 120 mw. steam enters all three stages of the turbine at 500°c. the maximum pressure in the cycle is 15 mpa, and the minimum pressure is 5 kpa. steam is reheated at 5 mpa the first time and at 1 mpa the second time. show the cycle on a t-s diagram with respect to saturation lines, and determine (a) the thermal efficiency of the cycle and (b) the mass flow rate of the steam.
Answers: 3
Engineering, 06.07.2019 03:10, tyheath42
Steel balls 12 mm in diameter are annealed by heating to 1150 k and then slowly cooled to 400 k in an air att 325 k and h -20 w/m2 k. assume the properties of the steel to be k- 40 w/m k, p 7800 kg/m3, and cp 600 j/kg k. a. determine whether lumped system method can be used to analyze this problem and if so why" b. determine the time required for the cooling process. c. determine the total amount of heat lost from each ball to the ambient air
Answers: 1
Engineering, 06.07.2019 04:10, jessicajustice6215
Cold water (cp=4180j/kg k) leadıng to a shower enters a thin-walled double-pipe heat transfer at 15c at a rate of 0.25kg/s and is heated to 45c by hot water (cp=4190j/kg k) that enters at 100c at the rate of 3kg/s. if the overall heat transfer coefficient is 950w /m2 k , determıne the rate of heat transfer and the heat transfer surface area of the heat exchanger using e - ntu method
Answers: 1
Asteam power plant operates on an ideal rankine cycle with two stages of reheat and has a net power...
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