Hot water (cph = 4188 j/kg·k) with a mass flow rate of 2.5 kg/s at 100°c enters a thin-walled concentric tube counterflow heat exchanger with a surface area of 23 m2 and an overall heat transfer coefficient of 1000 w/m2 ·k. cold water (cpc = 4178 j/kg·k) with a mass flow rate of 5 kg/s enters the heat exchanger at 20°c. determine (a) the heat transfer rate for the heat exchanger and (b) the outlet temperatures of the cold and hot fluids. after a period of operation, the overall heat transfer coefficient is reduced to 500 w/m2 ·k, so determine (c) the fouling factor that caused the reduction in the overall heat transfer coefficient
Answers: 3
Physics, 21.06.2019 20:20, jasminelynn135owmyj1
Suppose that a comet that was seen in 563 a. d. by chinese astronomers was spotted again in year 1951. assume the time between observations is the period of the comet and take its eccentricity as 0.986. what are (a) the semimajor axis of the comet's orbit and (b) its greatest distance from the sun?
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The weights of bags filled by a machine are normally distributed with a standard deviation of 0.05 kilograms and a mean that can be set by the operator. at what level should the mean weight be set if it required that only 1% of the bags weigh less than 9.5 kilograms? round the answer to 2 decimal places.
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Physics, 23.06.2019 02:30, morenodonaldo762
Can a molecule have bond dipoles but not have a molecular dipole?
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Hot water (cph = 4188 j/kg·k) with a mass flow rate of 2.5 kg/s at 100°c enters a thin-walled concen...
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