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Plate heat exchanger or plate cooler is one of the equipment used in the industry, which is used for heat exchange in the direction of cooling or heating. A plate heat exchanger consists of a number of corrugated thin metal plates that are placed next to each other. The arrangement of these plates is such that the desired fluid passes between these plates as one in between. The angle and number of grooves on these plates are very effective in the heat transfer coefficient of these plates. If the arrangement of plates of plate heat exchanger or plate cooler next to each other is correct, two different fluids must flow on both sides of a plate plate to have enough opportunity for heat exchange. The plate heat exchanger manufactured by Nasr Refrigeration Industries, which is known by the industrial name of plate cooler, can be used for various purposes, such as in livestock farms, milk collection stations, food processing factories, industrial factories such as oil factories, pipes, textiles, plastic industries, pharmaceuticals, etc. The special feature of these plate coolers (plate heat exchanger) is the material of the plates, which are made of stainless steel (stainless steel ss 316) and in the outer part of the plates, A thick plate is placed. The material of this plate can be painted iron, iron with steel coating and stainless steel according to the customer's request and the type of use of the product. Nasr Refrigeration Industries is ready to provide all kinds of plate heat exchangers (plate coolers) with different capacities and in different dimensions according to the customer's needs. In the plate heat exchanger, different capacities can be achieved by increasing or decreasing the number of cooler plates. For the accurate design and engineering of a plate heat exchanger (plate cooler), the following information is needed about both hot and cold fluids, including fluid type, inlet and outlet temperatures, fluid velocity and flow rate. In the construction of a plate heat exchanger, according to the desired fluid temperature and the number of sources used for cooling (or heating), two or more stages of plate coolers can be used, which are known as two-suction or multi-suction plate coolers. In fact, according to the number of devices, there are a number of separate paths for the entry and exit of the heating fluid (or cooling fluid). The proposal of Nasr Refrigeration Industries engineers to increase the efficiency in the plate heat exchanger (plate cooler) is to place stop plates in the stages of the exchanger. By changing the direction of fluid movement, these stop plates cause the fluid to pass through the plate plates at a slower speed, and the fluid has enough time to transfer heat.
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