I have some questions about heater design that I’d like to ask the seniors
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I have just started working in the machinery industry. While learning about heating equipment, I lacked a solid foundation of knowledge, which has caused my current learning process to come to a standstill; I really don’t know how to proceed with the design. I’ve come here to seek advice from those who are more experienced. I am currently studying the design of custom heating equipment, and I would like to ask whether, for an air heater with a capacity of 780 KW, a flow rate of 1.6 m3/s, a pressure of 0.8 MPa, and a temperature range from room temperature up to 300°C, using a cylinder with dimensions of φ600*2500, it will be possible to meet the design requirements I would appreciate some guidance from those with more experience; I don’t quite understand it
It should be possible. You can go to the website of the **Intellectual Property Office** and look for information on air heaters; their principles can be used as a reference, allowing it to meet the requirements despite having a low power level, small diameter, and short length!
This post was last edited by wiseboy on 2018-11-8 09:22. 1. What are the dimensions of your heat exchange tubes? What material is it? What is the arrangement? What is the pitch of the tubes? Is it a finned tube? If it is a finned tube: What is the material of the fins? Fin height? Fin gap? Fin thickness? . . . . . What is running inside the tube? Traffic? Pressure? Temperature? . . . . . . 2. Your shell side: Are there baffles? If there are baffle plates: what is the spacing between them? Baffle type? Baffle plate. . . . . . . . . . . . What is moving inside the shell? Traffic? Pressure? Temperature? . . . . . . There are many, many more conditions. . . . . . . In short, there are dozens of parameters for this heat exchanger, all of which directly affect its performance. You are viewing the heat exchanger design too simply. With these conditions you’ve mentioned, heat exchanger design is simply impossible. Heat exchanger design, detailed design, manual calculations: A designer with the necessary knowledge and proficiency in calculations requires 3 days. I’ll give you a similar design; take a look and see how much the difference is in your data. This is the complete calculation report; it does not include the calculation steps (there are too many of them), but only lists the original data and the results of the calculations: Below are the data in a straightforward format:
It’s not a heat exchange tube; it’s a heater that is heated directly by heating tubes. Still, thanks anyway
If you have any questions, feel free to talk to me; I can use software to help you do the calculations. It’s also a good opportunity for me to learn as well*
An electric heater that can heat things to 300°C at room temperature – it mainly depends on how the resistance wires are arranged and in what quantity. A 780KW unit with a diameter of 6 meters seems a bit excessive; it would be worth doing some detailed calculations
First, based on the information you already have, the first step is to carry out process design; once a rough selection has been made, then strength design is carried out in accordance with GB151! ! ! ! ! ! ! ! !