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Reconsider Prob. 11-15. Using EES (or other) software, investigate the effect of evaporator pressure on the COP and the power input. Let the evaporator pressure vary from 100 to 400 kPa. Plot the COP and the power input as functions of evaporator pressure, and discuss the results.
Prob. 11-15
Consider a 300 kJ/min refrigeration system that operates on an ideal vapor-compression refrigeration cycle with refrigerant-134a as the working fluid. The refrigerant enters the compressor as saturated vapor at 140 kPa and is compressed to 800 kPa. Show the cycle on a T-s diagram with respect to saturation lines, and determine
(a) the quality of the refrigerant at the end of the throttling process,
(b) the coefficient of performance, and
(c) the power input to the compressor.
In an undisturbed soil formation, it is known that the dry soil weight is 115pcf. The specific gravity of the soil particle is 2.75.a) What is the saturation wet unit weight of the soil b) What is the submerged weight of the soil
Determine the uniform flow depth in a trapezoidal channel with a bottom width of 8 ft and side slopes of 1 vertical to 2 horizontal. The discharge is 100 ft3/s. Manning roughness factor is 0.015 and the channel bottom slope is 0.004.
In order for a shower head to produce a 2.5 gpm flow for 120?F water, what pressure (psi) is needed at the hot water tank if the shower head elevation above the hot water tank is 28 ft? The pipe diameter is 1-in, and assume that the shower head has a..
Soil engineers hypothesize that the share of limestone in Austin’s soils is the same as that in San Antonio soils. They take 100 bore holes in each region
A turbine discharges water at 0.4 m3/s under a head of 10.50 m and with an overall efficiency of 80 %. determine what is The power developed.
Find the volume V of the solid bounded by the three coordinate planes and the plane 3x+2y+5z = 6 - Find the two coupled first order differential equations for the initial value problem.
Briefly describe the simplest heat treatment procedure thatwould be used in converting a 0.76 wt% C steel from onemicrostructure to the other, as follows:
Block B rests on a smooth surface. block A is on top of bock B. If the coefficients of static and kinetic friction beween A and B are μ_s=.4 and μ_k=.3, determine the acceleration of each block if someone pushes horizontally on block A with a force a..
A container containing saturated soils weighs 113.27 g before being placed in an oven and 100.06 g after drying remains in the same container overnight. The empty container weighs 49.31 g and relative density of the grains is 2.80.
for what flowrate through the Venturi meter will cavitation begin if p1=275 kPa gage, atmospheric pressure is 101 kPa (abs) and the vapor pressure is 3,6 kPa (abs)
Draw the influence line for the shear at point B. Plot numerical values every 5 ft. Assume the support at A is a roller and C is fixed. EI is constant.
Steam at 800 kPa and 300 C is bled off from a large supply line, passed through a valve, and allowed to enter an initially evacuated, uninsulated tank with a volume of 0.3 m3.
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