【Daily Question】Chemical Engineering Principles 233: Heat Exchangers (November 14)
Thread Content
This post was last edited by Zaihui Kangqiao on 2015-12-5 at 14:31. The Chemical Engineering Theory section is launching a \"One Question per Day\" campaign starting today, aimed at helping everyone reinforce their basic knowledge in chemical engineering. Subsequent campaigns will cover topics such as \"Chemical Engineering Principles,\" \"Mass Transfer and Separation,\" \"Chemical Engineering Thermodynamics,\" and \"Chemical Process Engineering.\" We hope for your active support! Answers to the questions in the \"One Question per Day\" campaign can be viewed directly; the thread will be closed after 1 day! ! Participation earns 3 wealth points, with an additional 3 wealth points for correct answers. Short answer question: Use cooling water to cool a certain amount of hot fluid from 100°C to 40°C; the initial temperature of the cooling water is 15°C. When designing a shell-and-tube heat exchanger, two approaches are to be compared: Approach I involves setting the final temperature of the cooling water at 30°C, while Approach II sets it at 35°C. Then, what is the water flow rate W1 in relation to W2? And what is the required heat transfer area A1 in relation to A2? Greater than, Less than
W1?＞＿W2?, so the required heat transfer area A1＜＿A2
Using cooling water to cool a certain amount of hot fluid from 100°C to 40°C, with the initial temperature of the cooling water being 15°C, two approaches are considered when designing a shell-and-tube heat exchanger. Approach I involves setting the final temperature of the cooling water at 30°C, while Approach II sets it at 35°C; as a result, the water volume required, W1?, is greater than W2?, and the heat transfer area needed, A1?, is smaller than A2?.
Then the water consumption W1 is greater than W2, and the required heat transfer area A1 is smaller than A2
Therefore, the water consumption W1 > W2, and the required heat transfer area A1 < A2.
Using cooling water to cool a certain amount of hot fluid from 100°C to 40°C, with the initial temperature of the cooling water being 15°C, two approaches are considered when designing a shell-and-tube heat exchanger. Approach I involves setting the final temperature of the cooling water at 30°C, while Approach II sets it at 35°C. In this case, the water volume required, W1, will be _＞_ W2, and the heat transfer area required, A1, will be _＜_ A2.
Using cooling water to cool a certain amount of hot fluid from 100°C to 40°C, with the initial temperature of the cooling water being 15°C, two approaches are considered when designing a shell-and-tube heat exchanger. Approach I involves setting the final temperature of the cooling water at 30°C, while Approach II sets it at 35°C. In this case, the water volume required, W1, will be ＿＞＿W2, and the heat transfer area required, A1, will be ＿＜＿A2.
Using cooling water to cool a certain amount of hot fluid from 100°C to 40°C, with the initial temperature of the cooling water being 15°C, two approaches are considered when designing a shell-and-tube heat exchanger. Approach I involves setting the final temperature of the cooling water at 30°C, while Approach II sets it at 35°C. In this case, the water volume required, W1?, will be less than W2?, and the heat transfer area required, A1?, will be greater than A2?.
Using cooling water to cool a certain amount of hot fluid from 100°C to 40°C, with the initial temperature of the cooling water being 15°C, two approaches are considered when designing a shell-and-tube heat exchanger. Approach I involves setting the final temperature of the cooling water at 30°C, while Approach II sets it at 35°C. In this case, the water volume required, W1, will be ＿＞＿W2, and the heat transfer area required, A1, will be ＿＜＿A2.
Using cooling water to cool a certain amount of hot fluid from 100°C to 40°C, with the initial temperature of the cooling water being 15°C, two approaches are considered when designing a shell-and-tube heat exchanger. Approach I involves setting the final temperature of the cooling water at 30°C, while Approach II sets it at 35°C; as a result, the water volume required, W1, will be greater than W2, and the heat transfer area required, A1, will be smaller than A2.