The Numerical Simulation And Optimization On The New Cellular Spiral Plate Heat Exchanger

Optimization of heat exchanger plays a very important role t on energy saving ofand the improvement of energy comprehensive utilization, development of efficientand compact heat exchanger is becoming a hot spot. This topic proposed three newkinds honeycomb structure of the spiral plate heat exchanger elliptical, which iscellular honeycomb, diamond honeycomb and droplet type honeycomb and researchthe heat transfer and resistance performance influence of honeycomb structure on thespiral plate heat exchanger. Through numerical simulation, this paper analysis itscharacteristics and mechanism about strengthening heat transfer in order to get acomprehensive performance better new spiral plate heat exchanger.The main work and conclusions are summarized as follows:1. On the basis of actual flow and heat transfer characteristics in the helicalport, the Physical and math model were build up. In the simulation, Realizable k-εwere employed. And the simulation was verified by the experimental data.2. To simulate the cylindrical cellular spiral plate heat exchanger, the analysiswas carried out on the heat transfer and resistance performance influence. The resultswith the cylindrical honeycomb structure, turbulence column and traditional spiralplate heat exchanger were compared in order to find the reason why honeycombstructure can enhance heat transfer.3. The simulation of six kinds structure results were compared. The six kindsstructure are cellular honeycomb, diamond honeycomb, droplet type honeycomb,cylindrical honeycomb structure, turbulence column and traditional spiral plate heatexchanger. Through the comparison, the best comprehensive properties of spiral plateheat exchanger is the spiral plate heat exchanger with droplet type honeycomb.4. Through the numerical simulation on the spiral plate heat exchanger withdroplet type honeycomb, this topic analyzed the related structural parameters of spiralchannels height H, spiral bending ρand droplet type honeycomb geometry size R、L effect on the performance of the heat transfer performance and resistance. Nu and fdecreased as H, considering the influence of the technology and material, H take5to10mm. The smaller ρ, Nu and f is larger, but ρwill have little impact on theNu. The increase of R leads to the increase of Nu and f. L and R has a correspondingextremum, Whether L increase or decrease will lead to the increase of Nu and f.5. Using Workbench complete parameterized modeling, calculation and analysisto study different structure parameters affect the performance of heat exchanger heattransfer and resistance. This paper use heat transfer coefficient and resistancecoefficient as the objective function to optimize the structure parameters and find theoptimal structure of three dimensions.