What type of heat exchanger use? It is more convenient to opt for one plate heat exchanger or one to tube bundle, especially when the trade-off between energy efficiency and specific applications becomes complex. In this article, we'll explore the pros and cons of both options to help you make a more informed choice.
Plate heat exchangers: technological evolution
Thanks to technological advances, the spread of plate heat exchangers continues to expand significantly. Types such as the brazed or fully welded plate exchangers are now able to withstand temperatures up to 900°C and under pressure up to 100 barThis robustness has allowed them to be used in numerous industrial applications, even where they would never have been considered before. Their impressive adaptability also offers not only higher heat exchange rates, but also greater flexibility.
The inherent flexibility of plate heat exchangers allows plates to be added or removed as needed, without modifying the existing piping system. This is particularly useful in industrial settings, where needs can change rapidly, ultimately ensuring a ROI (return on investment) particularly advantageous. In the next section, we will analyze the distinctive features of shell and tube exchangers and the situations in which they are most suitable for use.
Shell and tube heat exchangers: the classic choice for extreme conditions
Despite the advancement of plate technologies, the shell and tube exchangers continue to carve out a fundamental role for themselves, especially in extreme applications, i.e. where the operating conditions they overcome the limits of plate exchangers. For example, they are very useful for the flue gas recovery in refineries or for use on low pressure air. In short, when pressure drops and fluid speeds must be strictly controlled, shell and tube exchangers are the best devices in terms of robustness and capacity. manage large volumes at variable pressure.
In many cases, shell and tube heat exchangers are a guarantee of durability and resistance over time, although they are often bulkier than plate heat exchangers and require more frequent maintenance. Furthermore, they also cost more, but for some applications, there are no other viable alternatives. In the following section, we will explain the main criteria for choosing between these two options based on the specific needs of the industrial process.
Criteria for choosing the right heat exchanger
What kind of heat exchanger Should you adopt? Before choosing, it's essential to consider the specific requirements of the process. Among the determining factors are:
- required heat capacity;
- expected temperature and pressure limits;
- availability of space in the plant;
- acceptable maintenance frequency;
- budget available for the initial investment.
The choice between the plate heat exchanger and the shell and tube heat exchanger is also influenced by the desire to have a easy to maintain systemIn terms of space, plate exchangers allow for significant space savings, expanding or reducing the thermal capacity without substantial structural modifications.