The Central Heating Timeshare Partition Control And Operation Condition Optimization Research

Hybrid air conditioning system combined with floor radiant cooling and displacement ventilation give full play to their respective advantages of the flooring radiant cooling and displacement ventilation, to have the advantages of energy efficiency, comfort and aesthetic. So far, the system at home and abroad are mainly concentrated in the condensation problem, blower speed and vent position of comfort as well as energy saving, the study of the impact of inner heat source to the hybrid air conditioning system has been less.Under the principle of floor radiant cooling and displacement ventilation, and use the technology of CFD, the composite air-conditioning system in the office has been numerical simulation. analyzed the impact of indoor heat source location of the airflow and comfort, and to obtain the optimal solution. In this paper, Physical and mathematical models were established with a7.5m long,5m wide,3.5m high office example. By the numerical simulation was carried out on the indoor air distribution, the simulations get different heat source distribution of the velocity field and temperature field, and obtain optimal settings after analysing the body surrounding area temperature,velocity, and thermal comfort index,main conclusions are as follows:(1)Compared with the hybrid air conditioning system room no internal heat source:the indoor heat source takes a certain impact on the airflow room organization of hybrid air-conditioning system, not only to change the indoor airflow distribution, but also improves the temperature of the new wind to accelerate the speed of displacement ventilation, and improves thermal comfort.(2) Different horizontal position of heat source have the different impacts on indoor air distribution. the more heat source concentrated, the greater the role of the thermal plume generated, the more conducive to the exclusion of indoor residual heat and pollutants, more in line with human comfort requirements.(3)Indoor heat source not only have a larger impact on the vertical direction of airflow, but also have a certain influence in the horizontal direction. The more the heat source concentrated, the more uniform distribution of temperature field in the horizontal direction.(4)The heat source at the top of the room is just raise the exhaust temperature, will not impact on the thermal comfort of work area, and improve the energy efficiency of the system.(5)Appropriate to improve the position of the heat source is conducive to the effect of the displacement ventilation ventilation.The research results of the paper, Theoretical basises and design references to promote the use of the composite air-conditioning system have been provided. At the same time, can guide the design of airflow organization on the base of the thermal comfort, and there are certain practical significance for improving indoor air quality and energy conservation.