Acertain process requires 13 cfs of water to be delivered at a pressure of 30 psi. this water comes from a large-diametersupply main in which the pressure remains at 60 psi. if the galvanized iron pipe connecting the two locations is 200 ft longand contains six threaded 90= elbows, determine the pipe diameter. elevation differences are negligible. a certain process requires 13 cfs of water to be delivered at a pressure of 30 psi. this water comes from a large-diametersupply main in which the pressure remains at 60 psi. if the galvanized iron pipe connecting the two locations is 200 ft longand contains six threaded 90= elbows, determine the pipe diameter. elevation differences are negligible.

Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.

Air is compressed isentropically from an initial state of 300 k and 101 kpa to a final temperature of 1000 k. determine the final pressure using the following approaches: (a) approximate analysis (using properties at the average temperature) (b) exact analysis

Acommercial grade cubical freezer, 4 m on a side, has a composite wall consisting of an exterior sheet of 5.0-mm thick plain carbon steel (kst= 60.5 w/m k), an intermediate layer of 100-mm thick polyurethane insulation (kins 0.02 w/m k), and an inner sheet of 5.0- mm thick aluminium alloy (kal polyurethane insulation and both metallic sheets are each characterized by a thermal contact resistance of r 2.5 x 104 m2 k/w. (a) what is the steady-state cooling load that must be maintained by the refrigerator under conditions for which the outer and inner surface temperatures are 25°c and -5°c, respectively? (b) for power saving purpose, which wall material should be increased/reduced in. thickness in order to reduce 50% of the cooling load found in part (a)? redesign the thickness of the proposed material. 177 w/m-k). adhesive interfaces between the q=575.93 w