Engineering, 11.11.2019 21:31 camillaowens206
Q1. basic calculation of the first law (2’) (a) suppose that 150 kj of work are used to compress a spring, and that 25 kj of heat are given off by the spring during this compression. what is the change in internal energy of the spring during the process? (b) suppose that 100 kj of work is done by a motor, but it also gives off 10 kj of heat while carrying out this work. what is the change in internal energy of the motor during the process?
Answers: 2
Engineering, 04.07.2019 18:10
Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines
Answers: 1
Engineering, 04.07.2019 18:20
What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.
Answers: 3
Engineering, 04.07.2019 18:20
Asimple rankine cycle uses water as the working fluid. the water enters the turbine at 10 mpa and 480c while the condenser operates at 6 kpa. if the turbine has an isentropic efficiency of 80 percent while the pump has an isentropic efficiency of 70 percent determine the thermal efficiency
Answers: 1
Engineering, 04.07.2019 19:20
Determine (a) the maximum thermal efficiency of reversible power cycles operating between a hot reservoir at 1000°c and a cold reservoir at 200°c and (b) the maximum cops for reversible refrigeration and heat pump cycies, respectively, between 28°c and 14°c.
Answers: 1
Q1. basic calculation of the first law (2’) (a) suppose that 150 kj of work are used to compress a s...
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