The Temperature And Flow Field Simulation Of Hot Air Heating For A Tall Building

Hot air heating is a new heating system. It is heat medium. Firstly, it heats air. Then the hot air will be sent into the room. Hot air temperature is higher than indoor temperature and hot air mixes with indoor air. Hot air compensates for the heat loss of the room by its energy, maintaining required indoor temperature so as to achieve the purpose of heating.The paper simulates the flow field and temperature field of hot air heating tall building. And then it analyses the simulation results. The design of the hot wind heating system has a guiding significance.This article uses the CFD method. It uses computational fluid dynamics software ANSYS-FLUENT to simulate the flow field and temperature field of hot air heating tall building, and gets specific temperature and velocity distribution in the factory. Through the simulation results of the analysis, it proofs the feasibility of the hot air heating application in tall space building.In this paper, the hot air heating factory of unilateral return air is simulated. When the building body temperature arrives at 5℃,10℃,15℃,18℃and 20℃, the temperature and velocity distribution in the entire factory was analyzed respectively. It finds out the nonuniform temperature area of the factory. It gets each required time when temperature to meet the requirements of values. It puts forward that the best heating time is 504s when the distance between air ports and ground is 0.5m. At the same time, the factory heating temperature is up to 10℃and the temperature and velocity gradient value is very small. The heating effect is the best.Through the analysis of different conditions, when temperature is up to 5℃and air ports height changes from 0.5m to 4m, it can get the best effect of air heating when air ports height is 4m.