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1. 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.
(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.
Steam at 500 kPa, 300 degrees C is used to heat cold water at 15 degrees C to 75 C for a domestic hot water supply. How much steam per kilogram of liquid water is needed if the steam should not condense?
the united states is currently considering standards to generate 20 of its electricity from renewable resource in the
Steam enters a counter flow heat exchanger operating at stead state at 0.07 MPa with a specific enthalpy of 2431.6 kJ/kg and exits at the same pressure as saturated liquid. The steam mass flow rate is 1.5 kh/min. A separate stream of air with mass fl..
consider a simple brayton cycle using air as the working fluid has a pressure ratio of 12 has a maximum cycle
the capacitance in a series rcl circuit is c1 2.74 ?f and the corresponding resonant frequency is f01 6.57 khz. the
a pump fitted with 50mm bore ball bearings uses an oil whose viscosity ranges from 100cst at cold pump start-up to
a 600 mw coal-fired power plant has an overall thermal efficiency of 38. it is burning coal that has a heating value of
A. Steam enters well-insulated turbine at 7000 kPa, 600°C, with a velocity of 288 kph and leaves the turbine at 50 kPa and 150°C, at a velocity of 504 kph. The power output of the turbine is 6600 kW. Air enters an adiabatic nozzle at 45 psia and 940..
Coal is discharged from the tailgate of a dump truck with an initial velocity vA = 2 m/s A 50°. Determine the radius of curvature of the trajectory described by the coal.
A drilled shaft in a medium sand is shown in Figure P10.9. Using the method proposed by Reese and O'Neill, determine the following: a. The net allowable point resistance for a base movement of 25 mm
a tank whose volume is 0.01 m3 initially evacuated. a pinhole develops in the wall and the air from the surroundings at
An important fluid property is the kinematic viscosity which determines the viscous, or frictional, forces acting in a flow. The kinematic viscosity of air multiplied by 10^6 is given at 350, 450, 500, 550, and 650 K as 20.92,32.39, 38.79, 45.57, and..
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