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On a very still morning, the surface temperature of a lake used to cool the condenser of a power plant is 30°C while the air temperature is 23°C with a relative humidity of 80%. Assume a surroundings temperature of 285 K. The lake is nominally circular in shape with a diameter of approximately 4 km. Determine the heat loss from the surface of the lake by radiation, free convection, and evaporation. This heat loss determines the capacity of the lake to cool the condenser. Justify why the heat transfer correlation you select is useful, even though RaL is outside of its specified range.
A cable drum for a crane is to rotate between 160 and 166 rpm. Design a gear drive for 25 hp in which the input pinion rotates at 925 rpm and the output rotates with the drum. The crane is expected to operate with a 50% duty cycle for 120 hours per w..
A mixture of H2O 67.5% liquid and 32.5% vapor is in a closed, rigid container at 4 bar. The water is heated to 400 oC, determine the work and heat transfer, in kJ
a two-cylinder 250 cm3 displacement motorcycle engine that operates on an ideal otto cycle at 4500 rpm. the compression
Give the design speed, displacement, number of cylinders, bore, stroke, bmep, and torque. All parameter values should be within typical, reasonable values and should be consistent with the other values. State all assumptions you make.
a 5 ft3 tank containing steam at 14.7 psia 1 quality is fitted with a relief valve. heat is transferred to the tank
a non-uniform steady incompressible flow is observed to have a velocity of 15ms at a point where the cross-sectional
Determine the force in each member of the truss. State if the members are in tension or compression. Take that P = 550lb .Show transcribed image text Determine the force in each member of the truss. State if the members are in tension or compressio..
For H2O, determine the specified property at the indicated state. Locate the state on a sketch of the T-v diagram. (A) T=140 degree Celsius, v=.5 m^3/kg. Find p, in bar (B) p=30 MPa, T=100 degree Celsius. Find v, in m^3/kg (C) p=10 MPa, T=485 degree ..
An air conditioning system is used to maintain a house at 70F when the temperature outside is 90F. If the air conditioning system draws 5 hp of power when operating, determine the maximum rate of heat removal from the house that it can provide.
a car engine with a thermal eff. of 33 drives the air-conditioner unit besides powering the car and other auxiliary
For this flow field, what is the magnitude of the average velocity of the fluid crossing the surface OA of Fig. P6.23? Assume that the velocities are in feet per second when x and y are in feet
an internally reversible heat engine operates between the temperatures of 827deg c and 17 deg c and rejects 100 kj min
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