Study On Temperature Profile In 20 L Heat Pipe Bioreactor

20L Heat pipe bioreactor is exploited using high performance heat transfer element-heat pipe. It has many advantages such as uniformity of temperature profile, efficiency of heat transfer etc.The system testing temperature profile of fluid in HPBR and heat pipe wall is set up, we measure effectively the whole HPBR's temperature profile of Newtonian fluid and non-Newtonian fluid. To Newtonian fluid (H2O) system under all experiment conditions, when the reaction heat is under 13.3kW/m3, the system can be stabilized above 30℃ reaction temperature state by three heat pipes whose condensing apparatus are cooled by air nature; When the reaction heat is up to 40kW/m3, three heat pipes can keep it above 30℃ reaction temperature state whose condensing apparatus are cooled by water. To non-Newtonian fluid (2%CMC) system under torrential flow experiment condition, when the reaction heat is under 10kW/m3, the system can be stabilized above 30℃ reaction temperature state by three heat pipes whose condensing apparatus are cooled by air nature; When the reaction heat is up to 40kW/m3, three heat pipes can keep it above 30℃ reaction temperature state whose condensing apparatus are cooled by water. Under the torrential flow experiment condition, when the reaction heat is under 40kW/m3, the average temperature difference of Newtonian fluid and non-Newtonian fluid is only 0.32℃ and 0.30℃ separately, the maximum of theirs is 0. 8℃ and 0.7℃ separately; Heat pipe wall always keep good isothermal property under all experiment conditions, its maximum is only 0.4℃.Based on Computational Fluid Dynamics and the experiment data of temperature profile in the reactor, we use the mature business software (CFX) not only to fit, prove heat transfer model in HPBR ,but also to simulate temperature profile of Newtonian fluid under certain state . These will provide analysis of the transfer process in HPBR with reliable mechanism model and computing method. The result of analog calculation shows: (1)the classical Navier-Stokes equation is reliable mechanism equation which describes the momentum transfer of fluid in the state of laminar flow, the deviation values of flow temperature profile for all system are close to experiment result when applying the equation effectively to simulate and its value is 10% (2)The effective equation which can describes the momentum transfer processin lower torrential flow state is k-ε model, it greatly predigests the actual and intricate torrential flow process by only using the two parameters k and ε, the deviation values (16%)is a little high than that of laminar flow when applying the equation to simulate temperature profile, (3)Under all of the operational conditions, there is the point at the boundary area of reactor wall and tubes, where the transfer resistance is high, whose deviation value is maximum.Study on the heat transfer process in 20L heat pipe bioreactor will provide theoretical basis and data foundation for magnification of heat pipe bioreactor and will effectively accelerate exploitation for new-style bioreactor.