Engineering, 13.09.2019 23:30 budjasdatazaki467
Asteam power plant operates on an ideal regenerative rankine cycle with one open feedwater heater operating at 0.125 mpa. steam enters the first turbine stage at 15 mpa, 600 oc. condensate exiting the feedwater as saturated liquid at 0.125 mpa. the condenser pressure is 2.5 kpa. for isentropic processes in the two turbine stages and the pump, determine the followings: a) the net work of the cycle in kj/kg; b) the mass flow rate into the first-stage turbine, in kg-hr, if the net power developed for this power plant is 212 mw. c) the heat transfer into the working fluid through the boiler in kj/kg; d) the thermal efficiency of the cycle in %.
Answers: 3
Engineering, 04.07.2019 16:10
An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)
Answers: 2
Engineering, 04.07.2019 18:10
Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.
Answers: 1
Engineering, 04.07.2019 18:10
The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody
Answers: 2
Engineering, 04.07.2019 18:10
A-mn has a cubic structure with a0 0.8931 nm and a density of 7.47 g/cm3. b-mn has a different cubic structure, with a0 0.6326 nm and a density of 7.26 g/cm3. the atomic weight of manganese is 54.938 g/mol and the atomic radius is 0.112 nm. determine the percent volume change that would occur if a-mn transforms to b-mn.
Answers: 2
Asteam power plant operates on an ideal regenerative rankine cycle with one open feedwater heater op...
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