A heat exchanger is a device where the process of energy (heat) exchange between media of different temperatures takes place. The specific parameters and characteristics of the equipment depend on its type.
Regardless of the type of device, the main parameters must be taken into account:
- Heat exchange area. This is the area of one surface of the product multiplied by the number of surfaces.
- Heat exchanger power. The amount of heat generated by the device.
- Dimensions and weight. It will depend on them whether the equipment will cope with the task at hand.
Next, it is necessary to determine the technical conditions for using the equipment.
Usually, when calculating, manufacturers assume a surface margin of 10%. Contamination of the surface of the plates, underheating or insufficient speed of agents, and many other factors can cause a decrease in power and you need to be prepared for this. You need to make a surplus of the surface and be insured, although the device will be more expensive.
The selection of a micro channel heat exchanger with a zero surface reserve is possible only at the request of the buyer. But in this case, there is a possibility of a slight deviation from the initial data.
Loss of pressure
When sizing a plate heat exchanger, the supplier is tempted to go slightly beyond the pressure drop indicated in the questionnaire. The increase is the indicator of pressure loss, the number of plates decreases, the heat exchanger becomes cheaper. But often this indicator is critical for the normal operation of the heat exchanger.
The selection of a heat exchanger is a rather “scrupulous” process. It is important for the buyer to correctly determine the initial data and fill out the questionnaire, and after receiving the commercial offer, check it for compliance with the order.