What is the heat transfer rate

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Reference no: EM132416617

Problem: A cross-flow heat exchanger used in a cardiopulmonary bypass procedure cools blood flowing at 4 L/min from a body temperature of 37°C to 25°C in order to induce body hypothermia, which reduces metabolic and oxygen requirements. The coolant is ice water at 0°C, and its flow rate is adjusted to provide an outlet temperature of 19°C. The heat exchanger operates with the blood flow unmixed and the water flow mixed, and the overall heat transfer coefficient is 750 W/m2·K. The density and specific heat of the blood are 1050 kg/m3 and 3740 J/kg·K, respectively.

Required:

  • What is the heat transfer rate, in W?
  • What is the water volumetric flow rate, in L/min?
  • What is the capacity ratio?
  • What is the heat exchanger effectiveness?
  • What is the number of transfer units, N?T?U?
  • What is the heat exchanger area, in m2?

Reference no: EM132416617

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