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Home > What's New > The Basics of Heat Exchangers
  • The Basics of Heat Exchangers2011-09-20
  • Heat exchangers are a staple in today's devices. They are not only present with the simplest of devices; exchangers have also found their use in large industries and machineries with the globe today. They are essentially equipment found in some machines that enable it to transfer heat from 1 method to another. They facilitate the efficient transfer of heat from 1 item to another.

    Use of Heat Exchangers

    One example of the may be the radiators found in motors or air conditioners. What normally occurs is that the heat source transfers water that will cool the motor via the exchanger. The exchanger will transfer heat from the water to air leaving the motor cooler.

    Heat exchangers are widely applied for that purposes of room heating air conditioning and even refrigeration. Heavy industries that also use this technology include power plants, chemical and petrochemical plants, essential oil and petroleum refineries, organic fuel processors and sewage treatment facilities.

    Types of Heat Exchange Flow

    Heat exchangers might be classified into two types, mainly based on their flow arrangements. These would be the parallel-flow and the counter-flow exchangers.

    The parallel-flow exchange entails the two mediums heading with the exchanger via the same facet of the device. For example, two fluids will enter the exchanger on the same facet and journey parallel each other for that whole process.

    The counter-flow exchange, on the other hand, may be the opposite of the first process. Here, fluids will enter the gadget from different ends and meet each other for that process of heat exchange. Many exchangers use this flow considering that it has been verified to be the far more effective of the two processes simply because it could transfer far more heat from the heating method to the other. In this set-up, the mediums journey to 1 another and so are then processed through the exchanger.

    Traditionally, exchangers are created in the way the fact that surface area place in between the two exchanging fluids is maximised whilst minimising the resistance to the exchange flow on the same time. Additional fins installed in either path in which the fluids enter can also enhance exchangers. These fins can include to the surface area place of the exchangers whilst also helping handle the flow of fluids throughout the exchange process.

    Temperature throughout the Heat Exchange Process

    Depending on the dimension of the exchanger, temperature will vary throughout the exchange process. The temperature will also vary based on the location of the device. But many industries that use exchangers nearly invariably have their own defined mean temperature.

    This temperature is normally defined regarding the Log Mean Temperature Difference or the LMTD. Sometimes although the temperature is still hard to decide via the LMTD method, in this case, the NTU method is then used.

    Types of Heat Exchangers

    There are numerous types of heat exchangers applied today. These include shell tube exchangers, plate exchangers, adiabatic wheel, plate fin, fluid exchangers, dynamic scraped surface, phase-change exchangers, HVAC air coils, spiral exchangers and the immediate get in touch with exchangers.

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