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It has recently been proposed that OTEC could be used to produce ammonia, a chemical currently manufactured from natural gas at a total energy consumption of about 2.5% of the U.S. natural gas consumption. Since the manufacture of ammonia could be accomplished anywhere, the plant could be located in a favorable location, for example, off the coast of Brazil, where the difference in temperature between the upper layer of the ocean and the layer at the 600 m depth is approximately 20 K. Using an OTEC power plant of 500 MWe capacity, estimate the number of tons of ammonia that could be produced per year. For a price of $165/ton of ammonia, estimate the time required to regain the capital investment in the OTEC production plant and compare your estimate with the claim that the capital could be repaid in 2.5 years.
In a rectangle, if the length is increased and breadth is reduced each by 2 cm then area is reduced by 28 cm^2. If the length is reduced by 1 cm and the breadth increased by 2 cm, then the area increases by 33 cm^2. Find the area of the rectangle.
a 200-m-high 4-m-diameter stack emits 1000 kgs of 100 degree c gases into 5 degree c air. the prevailing wind velocity
given the temperature of a gas 313 in degrees celcius. determine the pressure in mpa if the gas the molar mass is 18
a steam power plant utilizing the rankine cycle has the following particulars- steam pressure and temperature at inlet
A fan within an insulated duct delivers moist air at the duct exit at 22°C, 60% relative humidity, and a volumetric flow rate of 0.5 m3/s. At steady state, the power input to the fan is 1.3 kW. Using the psychrometric chart, determine the tempera..
Consider a short cylinder whose top and bottom surfaces are insulated. The cylinder was initially at a uniform temperature of Ti. At time t=0, the cylinder is suddenly subjected to a convection from its side surface to a surrounding fluid at temperat..
A compressor receives 0.1 kg/s R-134a at 150 kPa, -10C and delivers it at 1000 kPa, 40C. The power input is measured to be 3 kW. The compressor has heat transfer to air at 100 kPa coming in at 20C and leaving at 30C (i.e. like a heat exchanger). What..
Refrigerant-134a is throttled from saturated liquid state at 7 bar to a pressure of 1.4 bar. Determine the temperature drop during this process and the final specific volume.
in a gas turbine natural gas methane and stoichiometric air flow into the combustion chamber at 1000kpa 500k. secondary
The total hot water flow rate is 10 gal/min which is equally divided among 16 plates. The average temperature of hot water is 80C. Calculate the pressure drop.
prepare a spreadsheet to calculate terminal velocity for objects of various sizes and materials falling through different fluids. The purpose is to help a high school science teacher explain the concept of terminal velocity to a class of 11th gra..
A refrigeration cycle maintains a clean room at 68o F by removing energy entering the room by heat transfer at the rate of 0.21 Btu/s. The cycle rejects energy by heat transfer to the outdoors where the temperature is 80o F. Assume steady state opera..
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