Consider a double tube heat exchanger used to cool 3000 kg/h of a solution (Cp = 0.45 Kcal/Kg oC) from 90 oC to 60 oC, using water (Cp = 1.0 Kcal/Kg oC) that enters at 20°C and exits at 40°C. Assume that the global heat transfer coefficient is 600 Kcal/hm2 oC. Let's assume that at first a test is carried out with the operation in parallel and later in countercurrent. 1) Regardless of the type of operation, whether in parallel or countercurrent, will the water flow in Kg/h be? 2) In the heat exchanger, the hot fluid gives off heat to the cold fluid and the cold fluid receives heat from the hot fluid. In this example, the heat transfer rate in Kcal/h is? 3) In parallel operation, hot fluids and cold fluid flow through the exchanger in the same direction entering at one end and exiting at the opposite end. Considering the example above, for a parallel operation, the calculated MLDT will be in ºC of?
Consider a double tube heat exchanger used to cool 3000 kg/h of a solution (Cp = 0.45 Kcal/Kg oC) from 90 oC to 60 oC, using water (Cp = 1.0 Kcal/Kg oC) that enters at 20°C and exits at 40°C. Assume that the global heat transfer coefficient is 600 Kcal/hm2 oC. Let's assume that at first a test is carried out with the operation in parallel and later in countercurrent.
1) Regardless of the type of operation, whether in parallel or countercurrent, will the water flow in Kg/h be?
2) In the heat exchanger, the hot fluid gives off heat to the cold fluid and the cold fluid receives heat from the hot fluid. In this example, the heat transfer rate in Kcal/h is?
3) In parallel operation, hot fluids and cold fluid flow through the exchanger in the same direction entering at one end and exiting at the opposite end. Considering the example above, for a parallel operation, the calculated MLDT will be in ºC of?
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