A counter-flow heat exchanger is stated to have an overall heat transfer coefficient of 284 W/m-K...

 

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A counter-flow heat exchanger is stated to have an overall heat transfer coefficient of 284 W/m-K when operating at design and clean conditions. Hot fluid enters the tube side at 109C and exits at 71C, while cold fluid enters the shell side at 27C and exits at 46C. After a period of use, built-up scale in the heat exchanger gives a fouling factor of 0.0004 m K/W. The surface area is 93 m. Assume both hot and cold fluids have a specific heat of 4.2 kJ/kg.K. Tein Thin Th,out Tout Determine the rate of heat transfer in the heat exchanger. (Round the answer to two decimal places.) The rate of heat transfer in the heat exchanger is | 106 W. A counter-flow heat exchanger is stated to have an overall heat transfer coefficient of 284 W/m-K when operating at design and clean conditions. Hot fluid enters the tube side at 109C and exits at 71C, while cold fluid enters the shell side at 27C and exits at 46C. After a period of use, built-up scale in the heat exchanger gives a fouling factor of 0.0004 m K/W. The surface area is 93 m. Assume both hot and cold fluids have a specific heat of 4.2 kJ/kg.K. Tein Thin Th,out Tout Determine the rate of heat transfer in the heat exchanger. (Round the answer to two decimal places.) The rate of heat transfer in the heat exchanger is | 106 W.