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The wall of a refigerator is constructed of fiberglass insulation (K=0.035W/moC) sandwiched between two layers of 1mm thick sheet metal(K=15.1W/moC). the refrigerated space is maintained at 3oC, and the average heat transfer coefficients at the inner and outer surfaces of the wall are 4W/m^2oC and 9W/m^2oC respectively. The kitchen air is at average temperature of 25oC. It is observed that condensation occurs on the outer surfaces of the refrigerator when the temperature of the outer surface drops to 20oC. Determine the minimum thickness of fibreglas insulation that needs to be used in the wall in order to avoid condensation on the outer surfaces.
A power outage occurred at a water distribution pump station. Before the power outage the station was pumping with one pump at 6,000 gpm in a 18" diameter Steel Pipe
Steady State Thermal analysis can be use to simulate and obtain results to support the design optimization / objectives
What is the velocity and rate of flow of the metal into the mold? Is the flow turbulent or laminar? (Pure aluminum density ρ = 2.7 g/cm3).
If the cycle operates in steady flow with a power output of 20 kW, what is the steam flow rate?
Evaluate the effect of the water spray on efficiency (net work out divided by heat input) and net power out per kg/s of dry air coming into the turbine.
Verify that heating the wire may be treated as a lumped-capacity process, find the steady-state temperature of the wire and find how long it takes for the temperature of the wire to reach 100°C.
A car and a high -speed trian at constant speeds. three seconds after the train passes under the highway bridge the car crosses the bridge.
State what the joints are in the system and knowledge of computational kinematics explain what you believe is the procedure to calculate each variable.
Immediately before failure, the testing machine records a force (F) of 50N, and a deformation (δ) of 2mm. We need to determine the maximum flexural strength (σ)
Determine the average luminous exitance of the opaque interior surfaces of the room - what is the reflected component at this point?
What is the discharge revised discharge pressure (guage pressure) of the compressor ? Is the assumption of change in temperature valid for calculating the discharge pressure of the compressor ?
A household refrigerator with a coefficient of performance of 2.4 removes energy from the refrigerated space at a rate of 600 Btu/h. Evaluating electricity at , determine the cost of electricity n a month when the refrigerator operates for 360 hou..
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