Engineering, 22.09.2020 22:01 ericavasquez824
Consider a shielding wall for a nuclear reactor. The wall receives a gamma-ray flux such that heat is generated within the wall according to the relation ˙q=˙qoe−ax where q0 is the heat generation at the inner face of the wall exposed to the gamma-ray flux and a is a constant. Using this relation for heat generation, derive an expression for the temperature distribution in a wall of thickness L, where the inside and outside temperatures are maintained at Ti and T0, respectively. assuming that the outer surface is adiabatic while the inner surface temperature is maintained at Ti.
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, 06.07.2019 02:30
Around steel bar, made from material with a yield stress of 750mpa, is loaded so that it has stresses co locations of maximum normal stress and maximum shear stress. use maximum shear stress and maximum distortion energy theories to calculate the safety factors for initial yielding failures.
Answers: 3
Engineering, 06.07.2019 04:10
Aheat pump with refrigerant-134a as the working fluid is used to keep a space at 25°c by absorbing heat from geothermal water that enters the evaporator at 500c at a rate of 0.065 kg/s and leaves at 40°c. the refrigerant enters the evaporator at 20°c with a quality of 23 percent and leaves at the inlet pressure as saturated vapor. the refrigerant loses 300 w of heat to the surroundings as it flows through the compressor and the refrigerant leaves the compressor at 1.4 mpa at the same entropy as the inlet. determine: (a) the degrees of subcooling of the refrigerant in the condenser, b)-the mass flow rate of the refrigerant . (c) the heating load and the cop of the pump, and d)-the theoretical minimum power input to the compressor for the same heating load.
Answers: 3
Engineering, 06.07.2019 04:10
Steam enters a converging-diverging nozzle at 1.0 mpa and 500°c with a negligible velocity at a mass flow rate of 2.5 kg/s, and it exits at a pressure of 200 kpa. assuming the flow through the nozzle to be isentropic, determine: the exit area and (a) (b) the exit mach number
Answers: 2
Consider a shielding wall for a nuclear reactor. The wall receives a gamma-ray flux such that heat i...
Mathematics, 02.11.2020 19:50
English, 02.11.2020 19:50
Mathematics, 02.11.2020 19:50
Health, 02.11.2020 19:50
Mathematics, 02.11.2020 19:50
Mathematics, 02.11.2020 19:50
Mathematics, 02.11.2020 19:50
Mathematics, 02.11.2020 19:50
Mathematics, 02.11.2020 19:50
History, 02.11.2020 19:50
Biology, 02.11.2020 19:50
Health, 02.11.2020 19:50