Changes in kinetic and potential energies are negligible

Assignment Help Mechanical Engineering
Reference no: EM13709619

Air is compressed steadily in a compressor from 100kPa and 300 K to 1 Mpa and 500 K. The compressor is not well insulated and a heat loss of 40 KJ/kg occurs during the process. Assuming the changes in kinetic and potential energies are negligible, determine the specific work input to the compressor, in kj/kg.

Reference no: EM13709619

Questions Cloud

Heat transfer coefficient between the sodium and the plate : Molten sodium metal is often used as a coolant in nuclear reactors. Consider molten sodium at 205 C flowing at a rate of 0.23 m/s over a plate with length and width of 1 m and 2 m, respectively.
Air flows through a pipe with a variable diameter : Air flows through a pipe with a variable diameter at a constant volumetric flow rate of 0.5 m^3/s. Assuming the velocity profiles are uniform throughout use mass conservation to find the velocity where the diameter is 0.4m and 0.2m
Many uses including the production of sulfuric acid : SO3 has many uses including the production of sulfuric acid (H2SO4). A gas stream having the (molar) composition shown in the figure below is to be passed through a two-stage converter. The fractional conversion of SO2 to SO3 (per single pass) in the..
Determine the maximum speed reached by the mass : An electric hoist consumes 5 kW of power at a constant rate to lift a 500-kg mass. Assuming that the hoist is 80% efficient, determine the maximum speed reached by the mass.
Changes in kinetic and potential energies are negligible : Air is compressed steadily in a compressor from 100kPa and 300 K to 1 Mpa and 500 K. The compressor is not well insulated and a heat loss of 40 KJ/kg occurs during the process. Assuming the changes in kinetic and potential energies are negligible, de..
Monthly payment if the mortgage is to be paid off : You are buying a home for $360000. If you make a down payment of $60000 ad take out a mortgage on the rest at 8.5% compounded monthly, what will be your monthly payment if the mortgage is to be paid off in 15 years?
Room is heated by a base-board resistance heater : Room is heated by a base-board resistance heater, which is designed to heat the air in this room from 8oC to 27 oC within 20 min. Approximating the room as a thermo-insulated cuboid 15m ? 10m ? 5m and assuming the specific heats to be constant at a r..
Yield strength for alloy that has average grain diameter : The yield strength for an alloy that has an average grain diameter of 4.4 x 10-2 mm is 115 MPa. At a grain diameter of 7.1 x 10-3 mm, the yield strength increases to 258 MPa. At what grain diameter, in mm, will the yield strength be 237 MPa?
Brass is higher than recrystallization temperature of copper : According to the Hall-Petch equation, Ostwald ripening follows the empirical rule. The recrystallization temperature of brass is higher than the recrystallization temperature of copper. The recrystallization temperature of bronze is lower than the re..

Reviews

Write a Review

Mechanical Engineering Questions & Answers

  The inertia of each gear is negligible determine the

suppose an external torque t1 is applied to shaft 1 which has polar area moment of inertia j1. gear 1 is mounted on

  Determine the net power developed by the plant in kw if the

in a gas turbine operating at steady state air enters the compressor with a mass flow rate of 5 kgs at 0.95 bar and

  If drew wants to drop a rock in addition to the snowball

drew drops a snowball from the roof of a building attempting to hit the top of a students head. evaporation causes the

  Estimate the pressure exerted against a sand below the

a well contains methane gas occupying the upper 6000 ft of annulus. the mean gas temperature is 170of and the surface

  A diffuser shown in fig p636 has air entering at 100 kpa

a diffuser shown in fig. p6.36 has air entering at 100 kpa 300 k with a velocity of 200 ms. the inlet cross-sectional

  A turbine takes in 2 kgs neon at 27 degc and 200kpa with

a turbine takes in 2 kgs neon at 27 degc and 200kpa with negligible velocity. the produced work is 75 kw and 30 kw of

  A particle traveled in a straight line in such a way

A particle traveled in a straight line in such a way that its distance (S) from a given point on that line after time (t) was S= 20t^3 -t^4 The rate of change of acceleration at time t=2 is what value?

  Air is contained in a piston-cylinder assembly

Air is contained in a piston-cylinder assembly, initially at 40 lbf/in^2 and 600R. The air expands in a polytropic process with n=k=1.4 until the volume is doubled. Modeling the air as an ideal gas with constant specific heats,

  Determine the magnitude and direction of the force exerted

water density 1000 kgm3 flowing in a horizontal 25 cm diameter pipe at 8 ms and 300 kpa gauge enters a 90 degree

  The compressor is cooled by the ambient air at 15 degc at

air enters a compressor at ambient conditions of 100kpa and 17 degc with a low velocity and exits at 1mpa 327 degc and

  When the heat pump is running at full capacity it draws 35

a heat pump uses a 100000 gallon swimming pool as a heat source in the winter. when the heat pump is running at full

  Inventor claims to have developed a power cycle operating

An inventor claims to have developed a power cycle operating between hot and cold reservoirs at 1175 K and 295 K, respectively, that provides a steady-state power output of (a) 28 kW, (b) 31.2 kW, while receiving energy by heat transfer from the hot ..

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd