Superheated steam heat exchanger
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Hello everyone, I am currently designing a heat exchanger. The hot fluid is superheated steam flowing through the tube side, with a flow rate of 125 kg/s, inlet and outlet temperatures of 580–362°C, and an inlet pressure of 18.4 MPa； The cold fluid is a binary molten salt (40% KNO3 + 60% NaNO3), which flows through the shell side; the inlet and outlet temperatures range from 270–560°C, with a pressure of 0.5 MPa. I have a few questions for everyone: 1. Given such high temperatures, should I choose a U-tube heat exchanger? ； 2. Will the use of a U-tube heat exchanger lead to temperature cross-talk? When I use HTRI for calculations, it indicates temperature cross-talk. Is it possible to use multiple BFU-type heat exchangers in series to address this issue? How should the number of heat exchangers required be calculated? ； 3. Does anyone have any examples of design patterns from HTRI? I’m encountering a run failure with this old approach. I would really appreciate it if everyone could help me out; I’ve been working on it for over a week yet still can’t figure it out. Thank you all!
The temperatures in the tube side and shell side of your heat exchanger clearly overlap, so only a single-tube-side design can be used. If needed, I can help you design it.
450 tons of steam per hour – that’s too much
Hello, are you referring to using BEM together with expansion joints?
It’s quite large; this superheated steam exits the heat exchanger and then enters the turbine to generate electricity
There is indeed intersection; they can be connected in series, or as a single tube in a single shell – one running in a straight line and the other in a serpentine pattern. For low temperatures, low temperatures are used, and for high temperatures, high temperatures are used; it’s also possible to have two tubes in two shells, similar to the above setup
Thank you. If it’s used in series, how do I calculate how many heat exchangers are needed?