Study On The Characteristic Of Heat Load On Intermittent Operating Mode Of Active Solar Heating System

With the development of economy in our country, especially in the west area where solar energy is abundant, solar energy, as a green resource, has drawn more and more attention, because of protection of the local environment and the response of the sustainable development of national energy policy. To use the solar energy more efficient, we can study the solar heating system by combining the active solar heating system with intermittent operating mode. So the study on the characteristic of heating load intermittent operating mode of active solar heating system is a very important link, which has significant meaning to the heating operating mode of active solar heating system. The method of the combination of them has not yet appeared abroad, in view of this, the paper gives detailed theory analysis and simulation studies on the characteristic of heating load of intermittent operating mode of active solar heating system.Based on the effective collection of heat drawn by the active solar energy system in Lhasa and four kinds of the intermittent modes operated according to the local characteristics, this paper calculated the heating load and the indoor temperature, and then got four kinds of situation of different heating modes to architectural heat load, the indoor thermal comfort and at last obtained the feasibility and the best plan of the intermittent operation mode of active solar energy heating system in Lhasa, and provide a basis to design the intermittent operation mode of active solar energy heating system.The paper firstly made a model of heating building's thermal system and intermittent operation system, through the analysis, the heat of the passive solar radiation, the heat through the building palisade structure, the storage load in the intermittent adjustment period are derived. By coupling these three forms of heat, the method to calculate the heat load of the intermittent operation mode of active solar energy heating system is got. According to the geographical characteristics and meteorological conditions in LHASA, four kinds of heating schemes are proposed. With the help of DeST, the evolution ofheating load and indoor temperature in four schemes are obtained. After processing the data by Origin, the change of solar heat, heating load of buildings, the influence of each part load on the heating load of buildings, change of indoor comfort and the feasibility of the scheme are derived.This study is not only significant in energy-saving, but also useful in engineering. The conclusion has important value in the design of solar heating system, and provides a basis for designing the solar heating regenerative system.