Simulation And Research On Thermal Environment In Large Space Building

To improve the quality of large space buildings’ design, effectively ensure the thermal comfort and control its’ building energy consumption, we must accurately estimate the indoor thermal environment. In terms of atrium, however, the indoor thermal environment has influenced greatly by outdoor climate, surrounding connected region and the control of local air conditioning area.Therefore, we can not treat the analysis of different atrium as the same thing, instead, we should analyze the specifically structural style, retaining condition and function of an atrium according to scientific method. To achieve the demand of design, we should calculate air-flow organization and CFD simulation to better the design.The text selected the atrium of a commercial building in Beijing as subject, because the surrounding maintenance structure of atrium is connected with the other air conditioned rooms. Besides, the cooling and heating load of the atrium is mainly derived from the skylight. After on-the-spot investigation of similar buildings, the text tries to simulate the condition of atrium’s air conditioning system and air flow organization to acquire relatively temperature field and the distribution of velocity field. And the text, in order to provide basis for the optimization of the architectural design, has evaluated and compared different operating conditions.In the process of building a model, the text tries to replace spherical nozzle with rectangular air port to save time that would be consumed during the process, so as to coordinate engineering demands. The text, to test the accuracy of simplifying nozzle model’s simulation results, have also comparatively analyzed simulation results and the actual measurement data of nozzle, then the text reached a conclusion that the errors between them are within an acceptable range.During the process of model, the text studied a simple spray model, by which the text confirmed the basic form of blowing-in and it’s parameter. Based on the above study, the text start to calculate the simulation of actual model and it’s optimize analysis. Through comparison, the text analyzed, under each plan, the simulation results of indoor thermal environment in different operating conditions. Finally, suitable air flow organization plans can be settled. The conclusion of the plan can not only be referred in the design of air conditioning system in supermarkets’ large spaces, but can also provide basis for the other kind of large space buildings’ to improve its’ indoor thermal environment and air conditioning system,so as to save its’ energies.