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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.
For the process where q= 62.5 kj/kg and wkcs= 60 kj/kg determine the energy change if the system mass is 2 kg.
a certain material 2.5 cm thick with a cross-sectional area of 0.1 m2 has one side maintained at 35oc and the other at
a carnot engine operates between temperatures of 700k and 400k and does 150 j of work in each cycle. what is the
a car is driven east for a distance of 43 km then north for 23 km and then in a direction 29deg east of north for 27
Problem Statement Consider the landing gear shown below. Working in teprns of two, come up with a single optimized design for given operational conditions and design considerations
If 300 Kg of air is pumped into a previously empty 100 m^3 tank, and the temperature of the air in the tank is 25 deg C, then what is the pressure in the tank in N/m^2?
measuring fracture toughnessthe aim of this demonstration is to use measurements of the load required to propagate a
two tanks are connected by a valve and line as shown below. the volumes are both 1 m3. tank anbspcontains r-134a at
Effect of pressure on temperature and density of air for an adiabatic process, The pressure is to be raised from atmospheric to 7 psi (4.83 bar). The process is adiabatic, and the volume is constant and unknown.
the horizontal roof of a building is coated with black tar. the roof is well-insulateed underneath while the upper
Write a complete program consisting of a Main Program and Subprogram (you choose which type, but there should be only one) that fulfills the following requirements.
Consider a metal single crystal oriented such that the normal to the slip plane and the slip direction are at angles of 43.1
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