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Air enters the evaporator section of an air-conditioner at 100 kPa, 27oC with a volumetric flow rate of 6 m3/min. R-134a enters the evaporator at 120 kPa with a quality of 0.3 and rate of 2 kg/min and it leaves as a saturated vapor at the same pressure.
Determine (a) the exit temperature of the air (oC) and (b) the rate of entropy production (kW/K) for the process in two ways: Assume the outer surface of the evaporator is insulated. Assume the outer surface is not insulated and heat is transferred from the surrounding medium which is at 32oC to the evaporator at a rate of 30 kJ/min.
a helium gas in a pistoncylinder is compressed from 100kpa 300 k to 200kpa in a polytropic process with n1.5. find the
A 4 20 mA signal is sent to a 12-bit Modicon PLC input card, which in turn, sends this to a SCADA. If the signal happens to be 14.25 mA, calculate: What percentage of 0 - 100% will this represent?
consider the steady operation of a refrigeration package for a shipping container on a train truck or ship. the package
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consider fully developed condition in a circular tube with constant surface temperature ts lt tm. determine whether a
this would provide you with a set of Reynolds numbers. Next, using the integral method, determine the velocity profiles within the boundary layer to be followed by determination of the heat transfer coefficient values for your selected Reynolds numbe..
A fuel consisting of 20% ethanol and 80% isooctane on a molar basis is burned with air in an engine. Write the balanced chemical reaction when this reaction is stoichiometric. What is the air-fuel ratio?
A house rises to 35°C on a hot summer day. When the owner comes home they turn on the air conditioning system to cool the house down. Within 30 minutes the house is cooled to 20°C.
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