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Six years ago, an 80-kW diesel electric set cost $160,000. The cost index for this class of equipment six years ago was 187 and is now 194. The cost-capacity factoris 0.6. (3.4)
(a) The plant engineering staff is considering a120-kW unit of the same general design to power a small isolated plant. Assume we want to add a pre compressor, which (when isolated and estimated separately) currently costs $18,000. Determine the total cost of the 120-kW unit.
(b) Estimate the cost of a 40-kW unit of the same general design. Include the cost of the $18,000 pre compressor.
Air enters a pipe at 25 Celsius, 100 kPa at a flow rate of 36 m3/hr. A heater on the outside of the pipe draws 8 amps at a voltage of 120 V. All the heat from the heater is transferred to the air (well insulated and wall t is small).
a knoop microhardness measurement was made on a sample that resulted in a khn of 481when a load of 5120 kg was applied.
Why have many large companies chosen ERP systems as the basis for their organizational information system? What problems may arise when deploying a large-scale ERP system in an organization?
The proposed design for anemometer to determine the velocity of an airstream in a wind tunnel is comprised of a thin metallic strip whose ends are supported by stiff rods serving as electrodes for a passage of current used to heat the strip.
What is the average shear strain g aver in the epoxy? What is the magnitude of the forces V if the shear modulus of elasticity G for the epoxy is 0.5 GPa
A cylindrical electric resistance heater has a diameter of 1cm and length of 0.25m. When water at 30oC flows across the heater a heat-transfer coefficient of 15W/(m2oC) exists at the surface. If the electrical input to the heater is 5W, what is the s..
For a given size of centrifugal pump casing, if the diameter of the impeller is reduced by 25 percent, how much does the power required to drive the pump change?
two materials a and b of the same density are being considered for the design of a large plate that is 2 m wide and 3 m
during the packaging process a can of soda of mass 0.4 kg moves down a surface inclined 20 degrees relative to the
plot the evolution of the height, h, of the stable boundary layer and the strength, delta thetas, as a function of time.
a refrigerator with a coefficient of performance of 4.0 transfers heat from a cold region at -20 degrees c to a hot a
Air at a stagnation pressure 700kPa flows isentropic ally through a convergent-divergent nozzle. The design pressure at the nozzle exit is 56 kPa. If the back pressure is raised gradually, thereby creating a shock in the divergent portion of the nozz..
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