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To increase the popularity of the container section, under the guidance of the leaders, a \"One Question per Day\" activity was launched to foster an active atmosphere for technical exchanges while also providing financial rewards to users. In the calculation of the tube sheet for fixed-tube-sheet heat exchangers, when the strength requirements are not met based on calculations for various operating conditions with temperature differences, expansion joints need to be installed. A) Axial stress in the shell, σC B) Axial stress in the heat exchange tubes, σt C) Pulling force between the heat exchange tubes and the tube sheet, q D) Radial stress in the tube sheet, σr Please reply with the answer you think is correct; participating in the quiz earns +1 wealth point (points are added automatically according to the rules; no additional points or comments will be given if your answer is incorrect). Those who get all answers right will receive an additional +3 wealth points. If you provide a detailed explanation for the questions or answers, you will receive extra points as well. If your answer is correct and your explanation is accurate, it will be marked as the best response. Feel free to answer; please do not reply repeatedly ； If a, b, c, and d are all correct, choose e; answering a, b, c, d, e will result in no points. Note: We will close this post after 24 hours to reveal the answers and explanations, as well as the best response (the best help). Attraction Bonus: If you post a topic in this section within two days to provide a detailed explanation of the knowledge points covered in this question, please reply to this post to inform us, and we will have a moderator grant you +Attraction. It is not allowed to simply copy and paste; original content is preferred, with at least some organization by the user along with personal insights and opinions. After registration, we will rank participants based on the content of their posts: the last-place participant will receive +1 charm point, the second-to-last participant +2 charm points, and so on, with the highest score earning +5 charm points. http://bbs.hcbbs.com/thread-1381938-1-1.html Inviting friends to join earns wealth. http://bbs.hcbbs.com/thread-1389197-1-1.html Seeking sponsors for branding
I think the answer should be option C
In the calculation of the tube sheet for fixed-tube-sheet heat exchangers, when the values of ABC calculated under various operating conditions with temperature differences do not meet the strength requirements, expansion joints need to be installed. A) Axial stress in the shell σC B) Axial stress in the heat exchange tubes σt C) Pulling force at the connection between the heat exchange tubes and the tube sheet q D) Radial stress in the tube sheet σr
A, B, C. Any one of the three situations.
In the calculation of the tube sheet for fixed-tube-sheet heat exchangers, when the strength requirements are not met based on calculations for various operating conditions with temperature differences, it is necessary to install expansion joints. (A)
In the calculations for the tube sheet using A.B.C., the axial stress σc of the shell, the axial stress σt of the heat exchange tubes, and the pulling force q between the heat exchange tubes and the tube sheet are determined for various operating conditions with temperature differences. If any of these values fails to meet the strength (or stability) requirements, it is necessary to install expansion joints.
In the calculation of the tube sheet for fixed-tube-sheet heat exchangers, when the values of ABC calculated under various operating conditions with temperature differences do not meet the strength requirements, expansion joints need to be installed.
A, B, C:):):lol:lol:lol
In the calculation of the tube sheet for fixed-tube-sheet heat exchangers, when A) the axial stress σC of the shell, calculated under various operating conditions with temperature differences, does not meet the strength requirements, it is necessary to install expansion joints. A) Axial stress in the shell σC B) Axial stress in the heat exchange tubes σt C) Pulling force at the connection between the heat exchange tubes and the tube sheet q D) Radial stress in the tube sheet σr
In the calculation of the tube sheet for fixed-tube-sheet heat exchangers, when the strength requirements are not met based on calculations for various operating conditions with temperature differences, expansion joints need to be installed. B) Axial stress σt of the heat exchange tube