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Air enters a compressor operating at steady state with a volumetric flow rate of 8 m3/min at 23°C and 0.12 MPa. The air is compressed isothermally without internal irreversibilities, exiting at 1.5 MPa. Kinetic and potential energy effects can be ignored. Evaluate the work required and the heat transfer, each in kW.
Design a flat roof meeting certain mechanical performance criteria. The basic structure of the roof is a series of rectangular-section 'joists', made from softwood, that span the space to be covered by the roof.
Calculating a Constant Pressure Process, In a constant pressure, nonflow process, 6Btus of heat are added to a gas while the volumes change from 1.6ft^3 to 2.0ft^3
The bent rod ABDE is supported by ball-and- socket joint at A and E and by the cable DF. If a 600-N load is applied at C as shown , determine the tension in the cable.
what size of pipe would be required to move 30 milliliters of air in one minute at a pressure of 100 psi.
Determine the minimum distance from a 50 ft height building from which the ball can be thrown and not hit the side of the building , but it may land on the roof depending upon how long the building is.
(a) derive an expression for the net work transfer for the cycle. Prove that for a Stirling Cycle, the net work transfer is always from the system to the surroundings.
Find the final state inside the tank, A tank contains 2kg of nitrogen at 10K with a quality of 50%.Through a volume flow meter and valve, 0.5kg is now removed while the temperature remains constant.
two spinning discs have the same angular momentum, but disk 1 has more kinetic energy than disk 2. Which one has the bigger moment of inertia - explain your reasoning?
the refrigerant is now heated at constant pressure until its temperature rises to 333k. calculate the work done during this process.
An engine block with a surface area measured to be 0.90m2 generates a power output of 55 kW with a net engine efficiency of 35%. The engine block operates inside a compartment at 157oC and the average convection heat transfer coefficient of 60 W/m..
Determining Feasibility, At steady state, a new power cycle is claimed by its inventor to develop 6 horsepower for a heat addition rate of 400 Btu/min
Define your system to be the gas in the cylinder, and calculate the work transferred from the surroundings to the system from this expansion. Note that the pressure will change as the expansion takes place.
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