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A company owns a refrigeration system whose refrigeration capacity is 200 tons (1 ton of refrigeration 211 kJ/min), and you are to design a forced-air cooling system for fruits whose diameters do not exceed 7 cm under the following conditions: The fruits are to be cooled from 28°C to an average temperature of 8°C. The air temperature is to remain above 2°C and below 10°C at all times, and the velocity of air approaching the fruits must remain under 2 m/s. The cooling section can be as wide as 3.5 m and as high as 2 m. Assuming reasonable values for the average fruit density, specific heat, and porosity (the fraction of air volume in a box), recommend reasonable values for (a) the air velocity approaching the cooling section, (b) the product-cooling capacity of the system, in kg · fruit/h, and (c) the volume flow rate of air.
pump a can empty a tank in four hours while pump b takes only three hours to empty the tank. how long will it take to
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The temperature of the water drops to 260 F as a result of heat transfer to the surroundings. Determine the final pressure in the tank?
Determine the force in each of the members connecting joints A through F of the vaulted roof truss shown. State whether each member is in tension or compression.
an adiabatic control volume with steam as the working fluid operates at steady flow conditions with the inlet state of
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