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The drinking water needs of a residential hall with 20 students is to be met by a bubbler type water fountain. The refrigerated water fountain is to cool water from 22 to 8oC and supply cold water at a rate of 0.4 L per hour per person. Heat istransferred to the water reservoir from the surrounding (kitchen air) at 25oC at a rate of 45W. a) If the COP of the attached refrigeration is 2.9, determine the size of the compressor, in W, that will be suitable for the refrigeration system of this water cooler. b) Now, assume that the refrigeration system is ideal (all reversible processes) and operates between TL =0oC and TH =35oC . Calculate COP value of the reversible refrigeration system and determine the new size of the compressor, in W, that will be suitable for the reversible refrigeration system of this water cooler.
Knowing that the bracket AB has a uniform thickness of 5/8 in., determine the principal planes and principal stresses at point H.
during this process heat is exchanged with surrounding such that the entire air remains at 30 degree celsius at all times.determine the heat transfer for this process.
Ideal vapor-compression refrigeration cycle, An ideal vapor-compression refrigeration cycle, with ammonia as the working fluid, has an evaporator temperature of -20c and a condenser pressure of 12 bar
Whit is the critical crack length in iron according to the Griffith-Orowan equation if surface energy=10^3J/m^2?
Briefly explain the difference between fatigue striations and beachmarks in terms of both size and origin.
Both cars undergo constant acceleration. Determine the time when the two cars pass each other on the highway.
if the velocity v of a paticle moving along a straight line decreases linearly with its displacement from 20ms to a
a power station output is 500 megawatts. during a test it is found that this represents 28 of the energy put into the
the walls of an insulated lunch box are made of inch-thick styrofoam with a thermal conductivity of 0.05wmk. if an ice
Evaluate the position and magnitude of the maximum bending moment.
Find the diameter of a pipe to convey the superheated steam flowing into the mixing process if the speed of the steam is 20m/s and also ascertain the condition of the resulting mixture.
Block B of the mechanism is confined to move within the slot member CD. If AB is rotating at a constant rate of AB = 3rad/s, determine the angular velocity and angular acceleration of member CD at the instant shown.
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