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A regenerative steam power cycle has a closed feed water heater that heats 20 kg/s of water from 100°C, 20 MPa to 250°C, 20 MPa. The extraction steam from the turbine enters the heater at 4 MPa, 275°C, and leaves as saturated liquid. What is the required mass flow of the extraction steam (kg/s)?
An irreversible heat pump is designed to remove heat at 7 C from the atmosphere and supply 43,200 kJ/h to an industrial process at 420 K . The COP of the actual heat pump is 60% of that of an internally reversible heat pump operating between the same..
an insulated piston-cylinder arrangement contains 2 l of saturated liquid h2o at a pressure of 150 kpa. an embedded 1.5
given a variable speed centrifugal pump initially pumping 32000 pounds mass per hour lbmhr at a discharge pressure of
An air compressor is designed to compress ambient (assumed to be 100 kPa, 20C) to a pressure 1 MPa. The heat transfer rate to the ambient is anticipated to be equal to 10% of the power input to the compressor.
given temperature of the hot loop tin36.70c tout73.738c hot flow 2.985 galmin temperatures of the cold loop tin 14.42c
Kinetic and potential energy effects can be ignored. Evaluate the work required and the heat transfer, each in kW.
a.calculate the enthalpy entropy and gibbs free energy changes when 10g of supercooled liquid silver solidifies
a rugged instrument used frequently for monitoring gas velocity in smoke stacks consists of two open tubes oriented to
A vapor-compression heat pump system uses R-134a as the working fluid. The refrigerant enters the compressor at 0.24 Mpa, 0 degrees Celsius, with a volumetric flow rate of 0.6m^3/min. The compression process is adiabatic to 0.9 MPa, 60 degrees Cel..
A Rigid, 85-L steam cooker is arranged with a pressure relief valve set to release vapor and maintain the pressure once the pressure inside the cooker reaches 200 kPa. Initially, this cooker is filled with water at 200 kPa with a quality of 8 percent..
The center of gravity of the boom is located at G. Determine (a) the tension in cables DE and DF, (b) the reaction at A.
a compressor receives air at 95kpa and 250c at low velocity. at the exit of the compressor air discharges at 1.52mpa
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