Advantages of plate heat exchangers

Advantages of plate heat exchangers

The heat exchanger is a commonly used machine in the work of the factory. The use range of the heat exchanger is very wide. The heat exchanger can be used in all aspects of the manufacturing industry in the weaving industry, food industry, and metallurgical industry. In the past, the commonly used heat exchanger was the tube heat exchanger, but now more people choose the plate heat exchanger. Why is it so popular? So what are the advantages of plate heat exchangers?

Plate heat exchanger - high heat transfer coefficient

Since different corrugated plates are inverted to form complex flow channels, the fluid flows in a three-dimensional rotating manner in the channels between corrugated plates, which can generate turbulent flow at a low Reynolds number (generally Re=50~200), so heat transfer The coefficient is high, which is generally considered to be 3 to 5 times that of the shell and tube type.

Plate-exchange heat exchanger—large logarithmic average temperature difference, small end temperature difference

In the shell-and-tube heat exchanger, the two fluids flow in the tube side and the shell side respectively. Generally, it is a cross-flow flow, and the logarithmic average temperature difference correction coefficient is small, while the plate heat exchanger mostly flows in parallel or countercurrent flow. , and its correction coefficient is usually around 0.95. In addition, the flow of cold and hot fluids in the plate heat exchanger is parallel to the heat exchange surface and there is no side flow, so the temperature difference at the end of the plate heat exchanger is small, and the heat exchange of water can be performed. Less than 1°C, while shell and tube heat exchangers are generally 5°Cfff.

Plate heat exchanger - small footprint

The structure of the plate heat exchanger is compact, and the heat exchange area per unit volume is 2 to 5 times that of the shell-and-tube heat exchanger. The area occupied by the heat exchanger is about 1/5~1/8 of that of the shell-and-tube heat exchanger.

Plate heat exchanger - easy to change heat transfer area or process combination

The purpose of increasing or reducing the heat transfer area can be achieved by adding or reducing a few plates; changing the arrangement of the plates or replacing a few plates can achieve the required process combination and adapt to the new heat transfer conditions. It is almost impossible to increase the heat transfer area of a shell heat exchanger.

Plate heat exchanger - light weight

The plate thickness of the plate heat exchanger is only 0.4~0.8mm, while the thickness of the heat exchange tube of the shell and tube heat exchanger is 2.0~2.5mm, and the shell and tube shell is much heavier than the frame of the plate heat exchanger , The plate heat exchanger is generally only about 1/5 of the weight of the shell and tube type.

Plate heat exchanger - small heat loss

Only the shell plate of the heat transfer plate of the plate heat exchanger is exposed to the atmosphere, so the loss of heat dissipation is negligible, and no insulation measures are required. The shell-and-tube heat exchanger has a large heat loss and requires a heat insulation layer. About 10%~20% of the shell and tube heat exchanger. Due to the small gap between the heat transfer surfaces and the unevenness on the heat transfer surface, the pressure loss is larger than that of the traditional smooth tube.

The above are the advantages of the plate heat exchanger introduced by Comfort 100. The plate heat exchanger is one of the relatively high-efficiency heat exchangers. The heat transfer performance of the plate heat exchanger can be three to five times higher, and the heat recovery rate is as high as more than 90%, which saves energy and money. The good quality of the plate heat exchanger is not only reflected in the work In terms of efficiency, the service life is also very long, so many people choose plate heat exchangers.