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A cooked mashed potato is cooled on trays in a chilling unit with refrigerated air at 2 C blown over the product surface at high velocity. The depth pf the product is 30mm and the initial temperature is 95 C. The product has a thermal conductivity of 0.37 W/ (m K), specific heat of 3.7 kJ/kg K and density of 100 kg/m^3. Assuming negligible resistance to heat transfer at the surface, calculate product temperature at the center after 30 min.
air flowing at 4x10-4kgs and 27 degrees c enters a sqaure duct that is 200mm on the side and 2m long. the duct surface
suppose another stone is thrown horizontally from the same building. if it strikes the ground 67 m away find the
a window frame manufacturer is searching for ways to improve revenue from its triple- insulated sliding windows sold
an adiabatic turbine operates by accepting superheated water steam at 8 mpa and 500degc at a mass flow rate of 2 kgs.
a small air turbine with an isentropic efficiency of 80 should produce 270 kjkgof work. the inlet temperature is 1000 k
Sketch a preliminary layout for the following heat exchanger systems. Large air forced cooling tower. Small vertically mounted shell and tube. Spiral heat exchanger in duty standby configuration.
determine the air and kerosene flow rates for a 100-mw regenerative gas turbine with 1800k turbine inlet temperature
a monometer is attached to a tank of gas in which the pressure is greater than that of the surroundings. the manometer
air undergoes an isentropic process from a pressure of 3 bar 20degc to a pressure of 1 bar. compute the final
air contained in a cylinder fitted with a piston is compressed in a quasi-equilibrium process. during the compression
a round compression member with both ends pinned and made of aisi cold-drawn steel sy441 mpa e207 gpa is to be used in
a team of engineering students is designing a catapult launch a small ball at a so that land in the box . it is known
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