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maryam shahbazi

Comparison of plate heat exchanger with shell and tube heat exchanger


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Some of these items are more important than others. The basic design of heat exchangers is driven by the application. Consider a fuel gas heater and an oil cooler on a typical stationary gas turbine, such as you might find at a combined cycle power plant. You will not likely ever need to clean the fuel gas heater. The operating pressure will exceed 40 atm. You wouldn't use a plate design. The oil cooler might need to be cleaned several times per year. A plate design held together with threaded rods is often used. It's easy to dismantle and clean. The working pressure isn't too high, it doesn't matter if it leaks a bit (the oil isn't going to explode), and it can stay out in the weather. Consider a feed water heater in a supercritical coal-fired power plant. It has a working pressure of 350 atm and is completely welded together. You would have quite a time cutting it apart with an acetylene torch. It matters if the fluids are clean, dirty, or corrosive. You don't use expensive alloys unless it's necessary. If you inspect any industrial plant or manufacturing facility, you will see a variety of heat exchangers. These diverse solutions illustrate human creativity and ingenuity. We're always looking for a better way to solve problems.

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