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Find the second-law efficiency of the heat pump in Problem 8.57.
Problem 8.57
A heat pump has a COP of 2 using a power input of 3 kW. Its low temperature is T0 and its high temperature is 80?C, with an ambient at T0. Find the fluxes of exergy associated with the energy fluxes in and out.
The water temperature is 14 C and the mean pore diameter is 0.33 mm. Is it permissible to use Darcy’s law under these circumstances? What is the reason for your answer?
Compute the geodetic coordinates of the station QBN from station MDU If coordinates of station MDU are f = 39°51'55"N, ? = 104°40'58"W Distance = 30km, Az = 243°40'48”, h = 1850m, dh= -20. Ellipsoid GRS80
The low pressure steam must be condensed and pumped back to called the Rankine Cycle. we will explore the effects of pressure and temperature on the plant efficiency and take into account moisture in the turbine.
Determine the required spacing of shear reinforcement over the span of a 28-in-wide and 18-in-deep beam with a clear span equal to 30 ft. 2 in. the beam suports a total factored uniformly distributed load of 5.0 kips/ft. Assume no. 4 U-stirrups wth ..
Force P is directed from point A(5,10,3) towards point B(1,-2,5) and has a magnitude of 15N. Vector Q=6i+2j-5k. When finding the projection of P onto Q what do you do with the 15N
Water is flowing in a 6-cm diameter pipe at 20 m/s at 10?C. If the pipe enlarges to a diameter of 12-cm, calculate the reduced velocity. Also, calculate the mass flux rate and the flow rate.
If the specific surface energy for aluminum oxide is 0.90 J/m^2, using data contained, compute the criteical stress required for the propagation of an internal crack of length 0.40 mm.
The plant will be designed with a rapid mix unit followed by flocculation and sedimentation basin. The water source has an average winter water temperature of 40 and an average summer water temperature of 70oF.
Determine the relationship which governs the velocities of the three cylinders, and state the number of degrees of freedom. Express all velocities as positive down.
The gate is rectangular with a horizontal width of 2m perpendicular to the paper. For a depth h = 3m of water, calculate the required force exerted by the hydraulic cylinder to keep the gate just closed.
A rod of steel is 20 m long at a temperature of 200C. find the free expansion of the rod when the temperature is raised to 650C. Find the temperature stress produced
What is the concentration of tracer in the reactor 1 h after tracer addition is terminated? The reactor had an initial concentration of tracer of 1.0 mg/L when tracer addition commenced.
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