Heat exchanger

A heat exchanger or heat exchanger is a device used to exchange energy between systems and objects with different parameters. Exchange stations are part of factories or housing estates.

They ensure heat distribution for heating individual objects and hot water heating. A small heat exchanger is a central or floor heating radiator that sells heat from the hot water low-pressure circuit to the apartment environment, which contains air.

Exchangers are divided into two groups - without phase change or with phase change. Depending on the construction of the heating surface, they are used as slabs or pipes. In homes, there are heat exchangers in heating systems, in refrigerators and air conditioning units, also in cars with an engine cooler and an exchanger for heating the cabin or for heating the water in the swimming pool. Heat exchangers are divided according to their design into recovery, regeneration and mixing.

The exchanger is usually calculated and connected as countercurrent. It is much more efficient when connected like this than when connected as co-current. If the exchanger is tall, then the heat is transferred over a long length, and due to the countercurrent connection, a large approximation of primary-input to secondary-output temperatures can be achieved. A tall exchanger also imposes more resistance and a more powerful pump will be needed to overcome pressure losses.

Pressure losses can be reduced by adding the number of plates: doubling the number of plates will reduce the pressure losses by a quarter.