FANS
What Is a Heat Exchange Unit?
What Is a Heat Exchange Unit?
Heat exchange units are the heart of many systems that you use every day. They are found in cars, trains, and planes, power stations, gas boilers, refrigerators, air conditioners, and even your own furnace at home. All these devices work together to keep you warm and cool, transport energy to and from your home, and help your equipment to function more efficiently. But how do they do it? And what are the different kinds of heat exchange units?
A heat exchange unit is a device that allows heat from one fluid to pass through another without the two fluids actually touching. The device can be a simple tube coiled inside a shell through which a colder fluid runs, or it can be a complicated plate with lots of holes through which hot water is passed. In either case, the heat is transferred between the two fluids.
In industry, heat exchangers are used to salvage waste energy from one stream of process and put it to good use by heating up a different stream. This saves money, reduces emissions and pollution, and is environmentally friendly. The type of heat exchanger you need depends on the application. For example, if you need an exchanger for an electric motor, you will need one that can withstand explosions and extreme temperatures as well as being small enough to fit into the space available.
There are also air-to-air heat exchangers that recover the wasted heat in extract ventilation from a building and reuse it to warm up supply air. This helps to reduce energy bills and guarantees outstanding energy efficiency and a comfortable indoor climate. These are suitable for offshore applications where space is at a premium and noise regulations must be adhered to, as well as in defence applications that require shock resistance.
Another type of heat exchanger is a wet surface air cooler. These units consist of a bundle of tubes and a fan system, with the tubes having various types of fins for additional surface area to increase the efficiency of the heat transfer. A fan either sucks air over the tube bundle (induced draught) or blows it through the tube bundle (forced draught). In this type of exchanger, the warm damp air is then vented to atmosphere. You will find wet surface air coolers in industrial and domestic air conditioning.
0users like this.