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  1. miclwl

    Heat Exchanger Efficiency

    I define the heat energy in the exhaust gas flowing into the heat exchanger as energy input. The heat energy transferred to the water as energy output. The efficiency is defined as: Efficiency = energy output/energy input
  2. miclwl

    Heat Exchanger Efficiency

    For my case, I have hot exhaust gas with flow rate of about 1000 kg/hr into the heat exchanger, and water flow rate of about 6000 kg/hr. I assume the overall heat transfer coefficient to be 130 W/m2.K, and surface area of about 23m2. I have found that the efficiency of the heat exchanger...
  3. miclwl

    Heat Exchanger Efficiency

    Hi all, I am working on a combined heat and power project, which will use a gas-water heat exchanger to capture the waste heat from exhaust gas of turbine and utilize this heat to heat up water. I need to have a general figure about the efficiency of gas-water heat exchanger. I would like to...
  4. miclwl

    Calculate Heat Exchanger Outlet Temperatures

    srfish, Thanks for telling me the reference book. I've found the method. However, I found that the method needs to use the heat capacity of both fluids. Since the hot fluid in my case is a mixture of gases, and, as you know, the heat capacity of gases change according to the temperature. So...
  5. miclwl

    Calculate Heat Exchanger Outlet Temperatures

    srfish, Could you please specify some books which have the thermal efficiency charts that you have mentioned? Thanks! Michael
  6. miclwl

    Calculate Heat Exchanger Outlet Temperatures

    Hi all, I would like to ask is there any method to calculate the outlet temperatures of the two fluids from a PLATE heat exchanger, provided that I know their inlet temperatures and mass flow rate? Please specify what information of the heat exchanger I need to know, and the equation needed for...

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