Many plants these days rely on the presence of equipment that is referred to as heat exchangers. As the name itself implies, the equipment plays a crucial role towards transferring the energy from the heat of one fluid towards another. This is done in order to control the actual temperature of a certain substance or system. A heat exchanger tends to contain two fluid streams. The first one is for the hot flied and the second is for the cold fluid. They are separated from each other through a tube that is thermally conductive. In some cases thermally conductive plates are used to separate them as well. In some cases, there may be no need for these plates or tubes especially when the fluids that are used are the immiscible types.
The design of a scraped surface heat exchanger is carried out in such a way where the streams of the two fluids are directed in such a manner where one is able to transfer thermal energy towards the other. There are several types of equipment and appliances these days that use the heat exchanging application. For instance, there are the refrigerators, furnaces, boilers air conditioning systems as well as radiators for automobiles.
If you are looking for this equipment that you can use for whatever application that you have in mind, remember that it is very important for you to choose the right kind. The options you have are plenty but you need to zero out on the unit that you know is going to be most helpful and most useful for your practical needs, understanding the different types and kinds that the market can offer might help make it easier for you to make the right calls as well.
This equipment may be qualified according to the transfer process of the heat. There are some that use a direct or an indirect contact method for heat transfer. When it comes to indirect contact this means that there fluids that are inside the system are actually separated by a boundary layer that is thermally conductive. This makes it possible for the heat energy to successfully flow while at the same time, it ensures that mixing or contamination is successfully prevented.
For those that are made with the direct contact principle, the fluids that are actually used are immiscible. In most cases, they will be gas and liquid to prevent them from actually mixing together this immiscibility ensures that there is no need for the two fluids to be actually separated together physically. So, they are able to transfer the heat without any need for any conductive layer to be placed between them.
These heat exchanger tubes may also be classified based on the number of fluids that are present as well. There are heat exchangers that do not only incorporate two liquids. There are instances where three and even more than three liquids are incorporated. There are also instances when these units can be classified depending on the flow arrangement of the liquids. It may either be a multi-pass or a single pass. It can also incorporate a counter flow, a co-current flow, or a cross-flow. So, make sure that you classify what it is that you prefer in order for you to select the right kind.