What is Heat Exchange?

DHP PHE Spares - Heat Transfer

Heat – no matter what form it’s in – flows from hot to cold. Hot air rises because it flows from the source to a cooler area.

Heat exchange is the process of heat energy moving from one entity to another without the entities coming into contact. In heat exchangers, heat is separated by plates, which allows the heat to transfer between them.

Heat transfer occurs when a hot fluid is brought into close contact with a colder fluid across a separating wall. Heat flows through the wall from the hot fluid to the colder fluid. In some cases the hot fluid is a refrigerant gas being condensed, while in other cases the cold fluid can be refrigerant gas which is evaporating. In the most common cases both fluids are water.

The heat exchangers that Heat Transfer NZ supply are most commonly liquid-to-liquid types (such as water to water). Our heat exchangers, provided by companies such as Sondex, DHP, Kaori, Hipex and Barriquand, are used in a wide range of industries including dairy, wineries and breweries, meatworks, and in recreational settings such as swimming pools . They can be used in geothermal areas such as Taupo and Rotorua.