Study And Design Of Photovoltaic Greenhouse Based On The Analysis Of Optic-thermal Coupling Flow Field Using CFD Technique

Duo to the influence of different environmental factors, the flow field inside greenhouse is too complex to be studied by traditional experimental methods. With the huge development of computer hardware technology, the solve speed and calculation capacity of Computational Fluid Dynamics(CFD) model have been improved rapidly. Thus CFD technique can be applied for the simulation of complex room, such as greenhouse. Recently, CFD technology has been widely used in different areas on the study of greenhouse.In order to study the indoor temperature field, air velocity field and incident radiation field, this paper presented three-dimensional CFD models of the Venlo type photovoltaic greenhouse and traditional glass greenhouse respectively. There were crops inside the glass greenhouse. Based on the previous papers and formula calculation, The computational domain of the CFD models were specified and then appropriate girds were obtained through model meshing. Suitable basic control equations, turbulent model, radiation model and porous model were selected for the CFD models.Measurement experiment in the two greenhouses was conducted to validate the CFD models. Some of the measured values were used as the initial values of the boundary condition in the CFD models. The greenhouse models were then simulated using CFD software FLUENT. The obtained calculate results were compared with the measured values,and proved that greenhouse CFD models were rational and effective. Verification test was conducted to ensure the independence of the simulations from the grids.The arrangement of the photovoltaic modules on the roof of the experimental glass greenhouse was analyzed and designed through the validated CFD models. By comparing the inside temperature field, incident radiation field and generated power of the greenhouses withdifferent photovoltaic modules arrays, the optimal plan was obtained which can provide theoretical basis for the future design projects.