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1. Give an estimate for the overall COP of an ammonia absorption cycle used as a chiller to cool water to 5?C in a 25?C ambient when the small pump work is neglected. A heat source is available at 100?C. Also find the efficiency of the heat engine part and the COP of the refrigeration cycle part.
2. Consider a small ammonia absorption refrigeration cycle that is powered by solar energy and is to be used as an air conditioner. Saturated vapor ammonia leaves the generator at 50?C, and saturated vapor leaves the evaporator at 10?C. If 3000 kJ of heat is required in the generator (solar collector) per kilogram of ammonia vapor generated, determine the overall performance of this system.
What are the two principle factors influencing the allowable bearing pressure in the design of a specific footing- Are both of these factors equally important? Are both factors likely to be equally relevant for different soils types
Suppose the summer daily demand for water use in Phoenix is normally distributed with a mean of 310 million gallons/day and a standard deviation of 45 million gallons/day. Also suppose the city has reservoirs whose combined storage is 350 million ..
in order evaluate the suitability of non potable water mixing concrete , six standard mortar cube were made using that water and six other using potable water
How would you define the coefficient of permeability? Give typical values of the coefficient for: a) fresh cement pastes; b) hardened cement pastes; c) commonly used aggregates;
A ball screw for a machine table drive is to be selected. The axial force to be transmitted by the screw is 600 lb. The table moves 24 in per cycle, and it is expected to cycle 10 fimes per hour for a design life of 10 years. Select an appropriate..
Assume that the shuttle is between perigee and apogee in the elliptical orbit so that the orbital speed is changing with time. Note that the θ t- and x-axes are tangent to the path, and the -axis is normal to the radial r-direction.
The two bars shown in the figure are used to support a load P. When unloaded, joint B has coordinates (0, 0). After load P is applied, joint B moves to the coordinate position (0.35 in., -0.60 in.). Assume a = 11 ft, b = 6 ft, and h = 8 ft. Determine..
The Pomdeterra wastewater treatment plant produces a thick sludge that has a suspended solids concentration of 3.8%. They are investigating a filter press that will yield a solids concentration of 24%.
The maximum vertical load and horizontal load have been identified and shown in the figure. Under this loading condition, you are asked to determine the horizontal deflection of joint C.
A closed box with horizontal base 6m x 6m and height of 2m is half-filled with water and is accelerated Ax=4.9 m/sec^2 and Ay=-2.4 m/sec. find the pressure at the forward and rear corners along the bottom.
Estimate the amount of depression storage (inches and cubic feet) in a 6-arce parking lot using the following rainfall and discharge data. The discharge data were measured at the only outlet in the parking lot.
For an unknown alloy the stress at which plastic deformation begins is 400MPa and the modulus of elasticity is 120GPa. If the original specimen length is 76 mm, what is the max length to which it may be stretched without causing plastic deformatio..
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