Effect of Tube Structural Style on Thermal Stress in CEFR Intermediate Heat Exchanger

Between different layers of CEFR intermediate heat exchanger tubes and inside sleeve, temperature gradient is distributed in radius direction, and thus results in various axial loads. The design of CEFR intermediate heat exchanger tube thermal compensation is bend tube to reduce the thermal stress of equipment. The thermal stress of different tube designing（straight tube and bend tube scheme） is calculated. The result indicates that maximum stress is at the top tube sheet area and stress of bend tube model is greater than the straight tube models. After heat exchanger tubes stress analysis, axial load of different layers heat exchanger tubes is balanced well by compensatory bend part. Because the tangential displacements of compensatory bend part is more, it will bring more tangential load to the top tube sheet.