News On Heat Exchanger
This write-up is intended for beginners. No advanced expertise required to understand this topic so why not give it a try?
I have far more than 10 plate heat exchangers (PHE) in my plant. Usually, we’ll monitor the flowrate, inlet and outlet temperature, too as pressure. Before, I joined the company, I observed that the “cleaning in place” (CIP) utilizing caustic answer was carried out when the PHE could no longer produced desired flow rate and temperature outlet. This is one approach of eliminating the fouling and scaling on the plate surface in order to improve the heat transfer. If CIP does not work, we have to dismantle the PHE, clean the plates in hot caustic and attach new gasket on it.
To stay away from enormous fouling and scaling from receiving worse, we need to conduct CIP regularly. When is the proper time to perform CIP? As mentioned above, when the flow rate is low or desired outlet temperature could not be achieved, we shall think about undertaking CIP.
A heat exchanger is often a device constructed for effective heat transfer from one medium to another, regardless of whether the media are separated by a solid wall to ensure that they never mix, or the media are in direct contact. Heat exchangers are widely used in refrigeration, space heating, air conditioning, power plants, chemical plants, petrochemical plants, petroleum refineries, and natural gas processing. A prevalent example of a heat exchanger is the radiator in a car, in which the heat source, being a hot engine-cooling fluid, water, transfers heat to air flowing through the radiator.
In the industry, particularly in procedure or manufacturing plants, you will find other forms of heat exchangers including plate exchangers, spiral exchangers and shell and tube exchangers. The price, size, specification, purpose and style varies inside each other. There are also several brands to pick for example Alfa Laval, Smidth Breten, Bowman, Graham and others.
Energy is becoming transferred from one side towards the other, thus it acts like an power saver. When the this gear is no longer efficiently transferring heat, it is time for cleaning. Hence, it is going to be stopped and cleaned from scale sticking on the surface of the wall.
However, I came out having a simple heat exchanger calculation, a formula to calculate the “Overall Heat Transfer Coefficient” (U-value) of the heat exchanger. The U-value will give me some indication on which heat exchangeris delivering the worse heat transfer. By simplifying the formula in excel file, I can conveniently know which heat exchanger needs attention just by inserting the inlet/outlet temperature, mass flow rate, heat capacity of oil, and surface region of the plates.
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