A steady state flow compressor draws in 14170 li/min of air whose density is 1.267 kg/m3 and discharge it with density of 4.88 kg/m3. At the suction, P1-103.42 kPa, at the discharge, p2=551.584 kPa. Thge increase in specific internal energy is 78.45 kJ/kg and the heat from air by cooling is 30.173 kJ/kg. Neglecting the change of potential and kinetic energy, determine the work done on the system in kJ/min.

A steady state flow compressor draws in 14170 li/min of air whose density is 1.267 kg/m3 and discharge it with density of 4.88 kg/m3. At the suction, P1-103.42 kPa, at the discharge, p2=551.584 kPa. Thge increase in specific internal energy is 78.45 kJ/kg and the heat from air by cooling is 30.173 kJ/kg. Neglecting the change of potential and kinetic energy, determine the work done on the system in kJ/min.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter44: Geothermal Heat Pumps

Section: Chapter Questions

Problem 1RQ: Geothermal heat pumps, or water-source heat pumps, are classified as either _____loop or _____loop...

See similar textbooks

Similar questions

Steam enters a turbine with a pressure of P1 = (5000 – K) kPa, specific internal energy u1 = (3500 + K) kJ/kg, mass flow rate of 7.5 kg/s and density of ρ1 = [1 + (K/1000)] kg/m3. Steam leaves at P2 = (2K) kPa with a density of ρ2 = 4.5 kg/m3and a specific internal energy of u2 = (1000 + 2K) kJ/kg. Heat loss from the device by radiation is 50 kJ/kg. Neglecting the changes in kinetic and potential energies, determine the power produced by the system. k=893
In a natural gas pipe line compressor, 110 m^3/min of propane is compressed polytropically. The inlet pressure is 101 kPaa and the temperature is 38 degree C. The process follows pV^1.08 = C. The exit pressure is 510 kPaa. Determine (a) the exit temperature in kelvins, (b) the mass flow rate in kg/s, and (c) the heat loss in kW. And also draw the P-V and T-S diagrams.
We want to pump subsoil water at a rate of 6 L / s by means of a submerged pump, with 90% overall efficiency, to a pond whose free surface is 25 meters above the surface in the lake. The water inlet to the pump is 1 m below the surface in the lake, where the pressure is 1.1 atm. Neglect variations in kinetic energy and determine:Data: 1 atm = 101.325 kPa PATM = 1 atm Water density = 1000 kg / m3 a) The electrical power consumed by the pump, in kW b) What is the daily electricity consumption (in kWh) if the 30 m3 capacity tank is filled 2 times a day?
Seventy kilojoules of work is done by each kilogram of fluid passing through an apparatus under steady-flow conditions. In the inlet pipe, which is located 30m above the floor, the specific volume is 3m^3/kg, the pressure is 300 kPa and the velocity is 50 m/s. In the discharge pipe, which is 15 m below the floor, the specific volume is 9 m^3/kg, the pressure is 60 kPa, and the velocity is 150 m/s. Heat loss from the fluid is 3 kJ/kg. Determine the change in internal energy of the fluid passing through the apparatus.
Determine the amount of heat added to a system if the following properties are given: mass flow rate=2.8 kg/s, z1=0 m, u1=23 kJ/kg, P1=15.2 kPa, v1=0.305 m3 /kg, z2=7 m, u2=18 kJ/kg, P2=10 kPa, v2=0.058 m3 /kg. A work of 287 kJ/kg is done on the system.
A double acting compressor with a volume displacement of 0.432 m3/sec, delivers air at 725 KPa at a rate of 0.188 m3/sec. The inlet condition of air 100 KPa and 30 °C and the angular speed of the compressor is 200 RPM. For a compression and expansion processes given by PV1.3=C. Determine: a) The percent clearance of the compressor. b) The bore and stroke, in meters, assuming that the stroke is equal with the bore and the volume displacement of the crank end and head end are the same.
44#6 in steady flow apparatus, 135 kJ of work is done by each kgm og fluid. the specific volume of the fluid, pressure and speed at the inlet are 0.37m^3/kgm,600kPa and 16m/s. the inlet is 32 m above the floor and the discharge pipe is at the floor level. the discharge conditions are 0.62 m^3kgm, 100 kPa and 270m/s. the total heat loss between the inlet and discharge is 9 KJ/kgm of fluid. in flowing through this apparatus, does the specific internal energy increase of decrease, and by how much?
A compressor draws in 0.25 m3/s of air whose density is 1.26 kg/m3 and discharges it density of 4.87 kg/m3. At the suction, P1 = 103.4 kPaa; at the discharge, P2 = 551.4 kPaa. The increase in the specific internal energy is 78.63 kJ/kg, and the heat from the air by cooling is 30.24 kJ/kg. Neglecting changes of potential and kinetic energy, determine the work on air in kW, BTU/min, and Hp.
A 30-kW motor drives a fan and delivers air through a duct 1.0 m x 1.0 m at 11.684 cm WG static pressure and 2.159 cm WG velocity pressure. The density of air is 1.20 kg/m³ and the density of water is 1000 kg/m³. Determine: 2. The capacity of fan, m3/s 3. Fan efficiency, %
A pump delivers gasoline ( = 685.75 kg/m3) at 20°C and 13.65 m3/h. At the inlet, P1 = 112.5 kPa, z1 = 1.25 m and V1 = 2.75 m/s. At the output, P2 = 555 kPa, z2 = 5 m and V2 = 3.375 m/s. How much power is required if the motor efficiency is 77.5%?
Steam enters a turbine with a pressure of P1 = (5000 – 162) kPa, specific internal energy u1 = (350 + 162) kJ/kg, mass flow rate of 1.5 kg/s and density of 1 = [1 + (162/1000)] kg/m3. Steam leaves at P2 = (2000 + 2(162)) kPa with a density of 2 = 2.5 kg/m3 and a specific internal energy of u2 = (100 + 2(162)) kJ/kg. Heat loss from the device by radiation is 50 kJ/kg. Neglecting the changes in kinetic and potential energies, determine the power produced by the system.
A steam turbine seems to operate at a mass flow rate of 1.5 kg / hr. Turbine inlet state P1 = 2 MPa, T1 = 400C and V1 = 60 m / s; the output state is P2 = 0.1 MPa, x2 = 0.97 and V2 = 150 m / s. Difference in height between turbine outlet 1 m. The heat loss from the turbine is given as 50 kW. a) Determine the production power from the turbine. b) Turbine power neglecting Kinetic and Potential energy changes calculation. Interpret these two results. c) Turbine spring and cross section areas, as well as steam pipe diameters calculation. d) If the ambient temperature is 27C, what is the entropy generation in the turbine?