Confirmation of heat exchanger model
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Regarding the types of heat exchangers, U-tube type heat exchangers have only one end cap, while floating-head type heat exchangers have two end caps of different sizes; the inlets and outlets for the tube side are located at the upper and lower parts of one end, making them double-tube-side heat exchangers. So, are 4-tube-side, 6-tube-side, and 12-tube-side heat exchangers all fixed-plate type heat exchangers? Or something else? The fluid flowing through the tube side of a fixed-tube-sheet heat exchanger should be harder to clean than the fluid flowing through the shell side, right? In our company, several heat exchangers are suspected to use circulating water on the shell side. Could the experts please share how to identify the type of heat exchanger based on its appearance, since the model number isn’t indicated on the nameplate. Thank you
Visually, all that can be seen are the two tube boxes at the front and back. The front tube box is relatively easy to identify; one can refer to GB150 for guidance. As for the rear tube box, if flanged tube sheets are visible, then it is a fixed-plate type. If no flanged tube sheets are visible, there are various possibilities: it could be a U-tube type, a coiled-type design, or an internal floating head type. It is necessary to remove the tubes in that section in order to determine the exact type. 4.6.8.12 It is not necessarily a fixed tube sheet; it could also be a U-tube
From the photos, it seems to be a fixed-tube-sheet type, not a floating-head type
Can the floating-head type be determined as a double-pipe passage, sir? Multiple passes are related to the pass box; U-tube types can also have multiple passes. I really hadn’t learned this before, but I did learn it this time. Thank you, teacher. There are many types of devices that are not floating-head or U-tube type; could those be fixed-tube-sheet type devices? Isn’t it quite difficult to clean the shell side of fixed-tube-sheet type devices? Therefore, I have doubts regarding whether circulating water should flow through the shell side. Thank you very much, teacher. Thanks!
Why manage processes? 2.4.6? 1. Because during the process calculations, the flow rate on the tube side is insufficient; in order to achieve a better heat exchange effect and keep the flow velocity in the tube side within an appropriate range, more tube passes are added to increase the flow velocity of the fluid within each tube pass. 2. The floating head type, fixed tube sheet type, and such things you mentioned. On the one hand, it is based on the owner’s requirements; on the other hand, the choice is made during the design process according to the properties of the medium. 3. During design, the type to be used is chosen based on factors such as the medium, pressure, and temperature ； On the other hand, it is only by referring to physical standards that one can determine what type it is. 4. The term \"fixed tube sheet\" refers merely to the way in which the tube sheet is connected to the flanges; it does not indicate the type of heat exchanger. Heat exchangers are divided into three parts: the front tube box, the shell, and the rear tube box. Terms like \"floating head type\" are determined based on the design of these front and rear tube boxes, and they are simply used as abbreviations. 5. Cleaning a heat exchanger with a fixed tube sheet is difficult, but its cost is low. For many manufacturers, it’s normal to prefer lower costs over higher quality
Structurally, it is divided into three **categories or four major categories. Fixed tube sheets, U-tubes, floating heads, kettle types – as long as the insulation or other covering isn’t too thick, they can be easily distinguished by their appearance
Check the nameplate; it’s the simplest and most direct way.
Bro, it’s better to look at the drawings objectively; this way you can gain a more comprehensive understanding of the structure and design of the heat exchanger. I don’t think it’s necessary to determine the type of heat exchanger on-site; or rather, it has no practical significance.
wai *ng jiu neng kan chu lai
Fixed tube sheets, U-tubes, floating head types, and kettle types all have their own advantages and disadvantages; there’s no need to worry too much about 2, 4, 6, 8, or 12 tube passes – this is related to the process design.