Simulating Of Directly-Heating Using Flue Gas From Gas Fired Boilers

Along with the development of society economic and the continuously raising of people's life level, the fixed heating period and heating temperature of traditional centralized heat-supply have already can not satisfy the consumer's growing need of heating comfortably. At the same time, the people who are not in the traditional regions of centralized heat-supply, including people in middle land and in south, have the same need for heating in winter. But no matter old centralized heat-supply's absolutely reformation or new one's large-scaled building in the south is impractical. Small boiler's poor ability of energy using, electricity's high value, the nation's concern to atmosphere environment quantity, more reasonable way of heating calculation, high efficiency of energy, all above make gas fired decentralized heat-supply's emerging naturally, and cooperating each other with centralized heat-supply (municipal, regional).A kind of gas fired decentralized heat-supply is designed in this article, as the implement of the lack of centralized heat-supply. The heating medium, water is omitted in this designed system. The flue gas is used for heating directly. In the process of designing, the boiler is chose through the researching room's heating load. And according to the experimental expressions of natural convection in big spaces, it is decided that how to arrange the tube in this room. Then an abstraction of this heating room into a model is made, in order to imitate the process of heating by Fluent. Through the analysis of these calculation results, it is proved that this kind of heat-supply can work well. At last, by comparing to other heat-supply, it is analyzed that the superiority on economical effect of heat-supply.