Study on the Application of Hybrid System in a Large Space Building

Energy efficiency and IAQ have become increasingly important and prominent concerns in building design, especially for large space buildings due to large amount of investment costs and energy consumption. Practically prolonging natural ventilation duration, extending intermediate seasons and reducing the operating time of air-conditioning could not only save energy but also provide a good IAQ. This paper presents the research on the application of hybrid ventilation system in a large space building. The hybrid ventilation system is an all-year coupled operation of ventilation with air-conditioning. The ventilation is used in intermediate seasons and air-conditioning is used in summer and winter. The switch-point temperatures determining the operating model of the hybrid ventilation system between ventilation and air-conditioning in intermediate seasons are investigated for the large space building. The analysis on energy saving potential in intermediate seasons shows that the hybrid ventilation system can reduce energy consumption in an efficient way.