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(Solved): 1.10; 1.13; 1.14 10 The gases in the cylinder of an internal combustion engine have a specific i ...
1.10; 1.13; 1.14
10 The gases in the cylinder of an internal combustion engine have a specific internal energy of and a specific volume of at the beginning of expansion. The expansion of the gases may be assumed to take place according to a reversible law, constant, from 55 bar to 1.4 bar. The specific internal energy after expansion is . Calculate the heat rejected to the cylinder cooling water per kilogram of gases during the expansion stroke. 1.13 A turbine operating under steady-flow conditions receives steam at the following state: pressure, ; specific volume , specific internal energy , velocity . The state of the steam leaving the turbine is as follows: pressure 0.35 bar, specific volume , specific internal energy , velocity . Heat is rejected to the surroundings at the rate of and the rate of steam flow through the turbine is . Calculate the power developed by the turbine. 1.14 A nozzle is a device for increasing the velocity of a steadily flowing fluid. At the inlet to a certain nozzle the specific enthalpy of the fluid is and the velocity is . At the exit from the nozzle the specific enthalpy is . The nozzle is horizontal and there is a negligible heat loss from it. Calculate: (i) the velocity of the fluid at exit; (ii) the rate of flow of fluid when the inlet area is and the specific volume at inlet is ; (iii) the exit area of the nozzle when the specific volume at the nozzle exit is .
Expert Answer
I'm simply resolving the first question in accordance with Chegg's instructions..Given ; KJ/Kg