Advantages of shell and tube heat exchangers
Within the different geometries of heat exchangers present in the market, as plate and gaskets, welded plates, spiral or scraped surface heat exchangers, among others, the tubular type is one of the most traditionally used.
Low maintenance costs with tubular heat exchangers
Since there is almost no need for spare parts (it is a completely welded construction).
High working pressure
As there are no gaskets and the heat exchangers are completely welded, the design pressure can be over 100 barg. With regard to the mechanical calculations, we can check them according to different design codes (ASME Section VIII Div.1, AD Merkblätter, 2014/68/EU), even using Finite Elements Analysis if required.
High working temperatures
Due to its completely welded construction and the absence of gaskets, there are no problems before high operation temperatures, as it occurs with other configurations.
Processing of particulate or fibre products
Being the diameter of the inner tubes determined by the percentage, shape and size of the solids. Within the SACOME range of products, we have our S-TF20-I Tube in Tube Heat Exchanger, the most suitable geometry for products containing big-sized particulates.
Easy inspection and disassembly
In order to get a better access to the tube sheet and the inner tubes, we can consider flanged tube sheet designs as well as connections (flanges, clamps, DIN11851) in all the interconnections/bends between the modules.
High security in aseptic processes
Tubular Heat Exchangers can be designed and manufactured with special geometries for pharma applications, as double tube sheet, that ensure that cross contamination doesn’t appear in the case of a leakage of a tube-to-tubesheet joint.
Easy to enlarge
Due to its modular design. It is relatively simple to add some modules in series with the aim to increase the thermal duty and the temperature difference. Likewise, in case of being necessary to increase the process flowrate, some lines in parallel can be arranged by means of manifolds that split the product or service flow.
The importance of rheology in the design of any processing plant is crucial since the sizing of many of the elements composing it is very dependent on this “resistance”, also taking special relevance with food products: heat exchangers, pipes, valves, pumps, mixers, etc.
To design a heat exchanger it is necessary to have certain data, such as the process flow rate, the temperature and the physical properties of products.
Hairpin heat exchangers have a more efficient and economical design compared to a multiple pass heat exchanger when the process requires a temperature crossing between the cold and hot fluid.