INFLUENCE OF RESIDENTIAL VENTILATION MODE ON ENERGY CONSUMPTION OF AIR CONDITIONING AND HEATING

With the development of building energy efficiency in China, the residential air -tightness is getting better and better, and the infiltration ventilation of windows and doors alone cannot meet the minimum fresh air requirement for people health. In order to ensure the indoor air quality and ventilation requirements, organized mechanical ventilation starts to be used in the house gradually in China. However, mechanical ventilation will affect the energy consumption of air conditioning and heating. In order to analysis and evaluate the effect of mechanical ventilation on energy consumption of the house in different climate zones in China, a house designed mechanical ventilation was studied. Using the method of numerical simulation, the energy consumption of air conditioning and heating in different ventilation rates were calculated and analysed in Beijing (cold zone), Shanghai(hot summer and cold winter zone), Guangzhou(hot summer and warm winter zone) respectively. It is obtained that the influence of ventilation rate on the energy consumption of air conditioning in summer and heating in winter in different climate zone. It is pointed out that designing reasonable ventilation rate design can meet the dual demand of energy efficiency and health when mechanical ventilation utilized in house. The results have great significance for guiding the design of residential ventilation system and optimizing the energy efficiency operation.