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A barge-mounted, ocean thermal energy conversion (OTEC) power station is being tested off the island of Hawaii. The 50 kWturbogenerator runs on a closed ammonia cycle. This uses the temperature difference between warm surface water (27oC), which is cooled just a fraction of a degree in the exchanger, and cold bottom water, which is heated from 6oC to 7oC on the exchanger surface. If the operation is only 10% as effective as a Carnot cycle between these temperatures (that is, between 6-7oC and 27oC), find the needed pumping rate of cold water up from the ocean bottom.
The first alternative is deep-well pumping at an annual cost of $10500. The second alternative is to instal an 18 inch diameter pipeline from a local surface reservoir at a first cost of $25000 and an annual pumping cost of $7000.
A particle moves along the positive x-axis with an acceleration in meters per second squared which increases linearly with x expressed in millimeters, as shown on the graph for an interval of its motion.
water flows into a weigh tank for 30 minutes. Calculate the increase in weight of the tank, if the discharge is 1.5 ft^3/s. The temperature is 50 F.
Write a user friendly computer program to design torsion reinforcement in rectangular and flanged beams, and plot the cross-sectional reinforcement details on a graphic plotter
A block begins to slide down a ramp after being elevated to an angle of 47.5 degrees. What is the coefficient of static friction
When a rocket reaches an altitude of 40 m it begins to travel along the parabolic path (y-40)^2=160x, where the coordinates are measured in meters. If the component of velocity in the vertical direction is constant at Vy=180m/s
For satisfactory operation, the static pressure at the pump inlet must not be lower than -6 m of water gage. Determine the smallest standard commercial pipe that will give the required performance.
A water treatment llant and the water treatment plant removes calcium hardness (Ca2+) by precipitating (making) CaCO3(s). If, after establishing equilibrium with CaCO3(s), the dissolved Ca2+ concentration is 10 mg/L and the pH is 10.5.
Given the data , design a section of sanitary sewer to carry these flows at minimum velocity of 2.5 fps. Assume that the minimum depth of the sewer below the street must be 8.5 ft and that an n value of 0.013 is applicable.
A horizontal pre-stressing force of 500kN is applied to rectangler beam. the beam has a depth of 500mm and a width of 250mm. the force is applied at a distance of 80mm below the x-x axis.
Are there any situations when parallel flow option may be preferred instead of a counter flow heat exchanger
Jack Flubber, who owns sons of Flubber Construction Co. and runs it as a proprietorships had gross profit last year of $ 80000. His personal and family expenses are $ 52000 and he has $ 7000 in exemptions and deductions.
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