ANALYSIS ON THERMAL STRESS DEFORMATION OF ROTARY AIR-PREHEATER IN THERMAL POWER PLANT
IntroductionNowadays, rotary air-preheater has been exclusively used in waste heat recovery applications for many years due to its compactness and preferable performance. Since the rotary air-preheater operates high temperature the matrix will be expanded in the hot-gas stream and be shrinking in the cold-fluid stream. At the same time, the inlet gas temperature, gas flow rate and properties are varied momentarily; a mushroom deformation is in evitable. The result is not only the leakage but also mechanical friction which seriously affects the efficiency and security of the system. Therefore, a significant weakness of this type of heat exchanger is the unavoidable flow leakage from the clearance of the rotation matrix due to its thermal stress deformation 1-3. It is important to pay special attention to measure mushroom deformation and adjust the sealing clearance. In this presented study, a simplified mathematical model of segmental plate is established, thermal and stress analysis of a sheet metal in welding was investigated. Firstly, the temperature distribution within the segmental has been determined in a simplified model of the storage materials. Then, based on the theory of elasticity, the formula of the thermal stress deformation is evaluated in analytical methods. Factorial design of experiment was employed for the comparison of the calculation data. The method s suggested can be applied for determining temperature distribution and designing the thermal stress deformation of rotary air preheater which presents outline of the developed guidelines.
Hongyue Wang Lingling Zhao Zhigao Xu Hyungtaek Kim
Division of Energy System Research Ajou University Suwon 443749, Korea College of Energy and Environment,Southeast University,Nanjing 210096, China
国际会议
The 7th China-Korea Workshop on Clean Energy Technology(第七届中韩清洁能源技术研讨会)
太原
英文
85-86
2008-06-25（万方平台首次上网日期，不代表论文的发表时间）