Structure Optimum For Shutter Baffle Heat Exchanger

The heat exchanger is a kind of universal technologic equipment,it is widely used in various fields of industrial production,research and develop new structure of heat exchanger is significant for the utilization and conservation of energy.In recent years,the development direction of shell and tube heat exchangers’enhanced heat transfer technology mainly from two aspects of the tube side and the shell side at home and abroad,at present,we have developed dozens of enhanced tubes,shell structures are continuous improvement,from the first lateral support to vertical support,screw support,as well as oblique support of this paper.The method which integrates theoretical analysis,numerical simulation and experiment is adopted to research the performance of shell fluid flow and heat transfer performance on typical representative of the oblique flow heat exchanger, researchs are mainly focusing on the following aspects.1.To verify the correctness of numerical simulation model and calculation method and the accuracy of simulation results, the cold model experiment of characteristics of the fluid flow in the shutter baffle heat exchanger is carried out,and use laser Doppler velocimetry (LDV) to monitor critical area in the shell fluid,and the entity numerical model is built according to the practical model of experiment heat exchanger,compare the experimental results and numerical simulation results,both in good agreement,it is showed the validity of the modeling approach and simulation.2.Numerical simulation is adopted to study different structural combinations of parameteres for oblique flow heat exchanger with triangle tube layout in shell side,analyzes heat transfer and flow resistance performance under different combinations of parameters,summarizes influence laws of different structures and processing parameters on heat transfer and flow resistance performance.Based on the results,the correlative equations of the heat transfer coefficient and the pressure drop in the shell side which provide the reference for the design are deduced.3. Periodic whole cross-ssection computation model and flow and temperature field numerical simulation are adopted to analyze shutter baffle heat exchanger and baffle-plate heat exchanger with triangle tube layout in shell side,compares the changes with Re of the performance of heat transfer coefficient,flow resistance,comprehensive performance of the three heat exchangers.And the Field Synergy Principle is adopted to analyze heat transfer performance of the two heat exchangers.4. Periodic whole cross-ssection computation model and flow and temperature field numerical simulation are adopted to analyze hole shutter baffle heat exchanger,pass side shutter baffle heat exchanger,rod baffle heat exchanger with square tube layout in shell side,study the changes with flux in shell side of the performance of heat transfer coefficient,flow resistance,comprehensive performance of the three heat exchangers.