Engineering, 20.08.2019 17:10 madisongibson62
Water is the working fluid in an ideal regenerative rankine cycle. superheated vapor enters the turbine at 10 mpa, 4808c, and the condenser pressure is 6 kpa. steam expands through the first-stage turbine to 0.7 mpa where some of the steam is extracted and diverted to an open feedwater heater operating at 0.7 mpa. the remaining steam expands through the second-stage turbine to the condenser pressure of 6 kpa. saturated liquid exits the feedwater heater at 0.7 mpa. determine for the cycle: (a) the heat addition, in kj per kg of the steam entering the first-stage turbine.(b) the thermal efficiency.(c) the heat transfer from the working fluid passing through the condenser to the cooling water, in kj per kg of steam entering the first-stage turbine. for the cycle of this problem, reconsider the analysis assuming the pump and each turbine stage have an isentropic efficiency of 80%. answer the same questions as in problem above for the modified cycle.
Answers: 2
Engineering, 04.07.2019 18:10
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Engineering, 04.07.2019 18:20
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Engineering, 04.07.2019 18:20
Air flows over a heated plate à t a velocity of 50m/s. the local skin factor coefficient at a point on a plate is 0.004. estimate the local heat transfer coefficient at this point.the following property data for air are given: density = 0.88kg/m3 , viscosity 2.286 x 10 ^-5 kgm/s , k = 0.035w/mk ,cp = 1.001kj/kgk. use colburn reynolds analogy.
Answers: 1
Water is the working fluid in an ideal regenerative rankine cycle. superheated vapor enters the turb...
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