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A simple steam power plant operates at steady state with water circulating through the components with a mass flow rate of 100 kg/s. Stray heat transfer, kinetic energy and potential energy effects are negligible. Determine the thermal efficiency and the mass flow rate of cooling water from an adjacent river given the following information: The pressure and temperature of the steam entering the turbine are 3 MPa and 450 C respectively; the water leaving the turbine has a quality of 95% at a pressure of 60 kPa. After passing through the condenser, it is saturated liquid. The water then goes through the pump and exits at 3 MPa and 90 C where it then enters the steam generator and exits as the high pressure, high temperature steam to complete the cycle. The cooling water from the river enter the condenser at 20 deg C and is only allowed to be discharged back into the river at a temperature that is 10 deg C higher.
Drawdown at a 0.20 m diameter, fully penetrating well, which has been pumping at the rate of 1000 m^3/day for a long enough time that steady state conditions have been reached, is determined to be 0.70 m.
Compare the physical migration of workers during U.S. industrialization and present-day intellectual transition into a new type of workforce.
A sample of natural glacial till was taken from below the groundwater table. The water content was found to be 52%. Estimate the wet density, dry density, buoyant density, porosity and void ratio. Clearly state any necessary assumptions.
Calculations with steam mixed with additional steam at a different pressure, A steam press at 650Kpa + dryness fraction of 0.9% flows along a pipe at a rate of 3.5Kg per second
A young engineer has invented holographic mobile phones and has approached a venture capital company to invest in it. The venture capital company considers the product to be an all or nothing product
Determine the factors of safety against sliding and against overturning, and also the soil pressure at the heel and toe. Assume hydrostatic uplift varies uniformly from full hydrostatic head at the heel of the dam to zero at the toe. consider 1m l..
Assume that the sludge does not change density during filtration and that liquid removed from the sludge contains no sludge. Using mass-balance method. determine the volume of sludge after filtration.
Given that uniform flow is subcritcal and there is a constriction in a rectangular channel, how do you determine what the constricted width would be to force the flow to be critical. Draw this transition on a specific energy curve.
Solar cookers can be used in less developed countries for cooking and also for thermal disinfection of water. To disinfect water, the water must be heated to about 35 Celsius for 5 hours. Of course, it takes time to raise the temperature of the wa..
The velocity along a pathline is given by V (m/s) = s^2 x t^(1/2) where s is in meters and t is in seconds. The radius of curvature is 0.5 m. Evaluate the acceleration along and normal to the path at s = 2m and t = 0.5 seconds.
a component in a packaging machine is subjected to a tensile load of 36.6 KN which will be repeated several times over the life of the machine. The cross-section of the component is 12 mm thick and 20 mm wide.
Is the system within membrane manufacturer's warranty requirement of maximum flux rate of 14 gfd? What is the annual power cost of the RO system?
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