Calculation of heat exchange area problem

Qian Songwen has a \"Heat Exchanger Design Manual\" that contains detailed steps; in addition, it is necessary to refer to GB151, and calculations can also be carried out by following the steps below. I. Structural design: Select the type of heat exchanger based on the design requirements, and initially determine the structural dimensions. (such as the outer diameter of the tube, length, outer diameter of the cylinder, etc.). II. Thermal calculation: Calculate the required heat transfer area, and adjust the dimensions so that the heat transfer area of the structural design is approximately equal to the calculated value. III. Fluid resistance calculation: Calculate the pressure drop to ensure it remains within the allowable range. (The pressure will generally be determined based on the entire process flow.) IV. Design for strength, stiffness, and stability: Determination of the shell diameter and calculation of the shell wall thickness. Selection and thickness calculation of heat exchanger end caps. Calculation of tube sheet strength and determination of dimensions. (Calulation of temperature difference stress included) Calculation of the pulling force on pipes. Calculation of supports. (Including calculations for horizontal and vertical supports, as well as calculations for reinforcement of openings, etc.) V. Drawing: Based on the calculation results, the structure of various components is determined in detail, as well as the selection of certain standard parts (such as container flanges, baffle plates and support plates, tie rods and spacers), after which the structural design drawings and construction drawings are prepared.

If doing the calculations by hand, it’s fine to refer to the design manual provided on the second floor. If you need help with the calculations, you’ll have to provide specific property values. I’m not sure whether the property values for fresh water and seawater are fixed; if they are fixed, then others can assist you with the calculations, but I don’t know the relevant property data

If the pressure is not high, a plate heat exchanger is more appropriate.

I estimate it’s around 25 square meters! It needs to be calculated based on the properties and structure of the fluid.

Now, manual calculations seem to be less common; design institutes have specialized calculation software that requires only the input of data. Of course, some parameters need to be selected manually, and differences in this regard can lead to different calculation results.

Friend on the 5th floor, may I ask how the area of around 25 m2 was calculated? Could you provide me with the detailed process? This heat exchanger is intended for use on ships; the pressure is not high. A fixed-type heat exchanger has been chosen, with the shell made of carbon steel, the tube sheet made of HSn62-1, and the heat exchange tubes made of HAL77-2. The pressure is 5 kilograms

I haven’t done manual calculations in a long time, but I still remember how to do them! Now calculate directly using HTRI. But there is no seawater inside the HTRI! Only fuzzy calculation using water data or input of material properties is possible. A standard 1-1 single pass requires around 55 M2! Using 2-4 is much smaller! Around 30, but it seems pointless to use such a small device for multiple trips!

I agree with what was said on floor 8; if you plan to use the tube sheet design, it’s better to use software to carry out the calculations yourself. http://bbs.hcbbs.com/viewthread.php?tid=109150&highlight=%B9%DC%CA%BD%BB%BB%C8%C8%C6%F7