燃气炉烟气直接采暖的数值模拟.pdf

哈尔滨工程大学
硕士学位论文
燃气炉烟气直接采暖的数值模拟
姓名:于浩
申请学位级别:硕士
专业:热能工程
指导教师:马景骏
20060301
哈尔滨程人学硕土学位论文
摘要
随着社会经济的发展,人民生活水平的不断提高,传统供地区集中供
热固定的供瞹期和供暖温度已不能满足消费者对采暖舒适性越来越髙的縉
求。同时,非传统集中供瞹地区的人们,包括中原和南方的人们同样对冬季
采暖提出了需求。而不管是传统集中供热的完全改造还是南方大规模集中供
热的兴建都是不切实际的。而小型区域锅炉供暖能效低,用电供暖则增加用
电压力,加上国家对大气环境质量的关注,对更合理采暖计量方式的探索,
对热能利用效率新的要求,使得分户燃气采暖形式应运而生。从而形成了分
户燃气采暖与集中供热(城市、区域性)互补共存的供暖新格局。
本文针对不在集中供热区域内,而又有供暖需求的用户采用中小型燃煤
锅炉釆曖能效低的情况,提出了不经过循环水,而利用燃气炉烟气直接供暖
的燃气采暖方式。在供暖方式的设计中运用工程设计中的热负荷计算方法算
出所研究房间的热负荷,从而定出燃气炉的功率。再按照自然对流的实验关
联式设计出供热烟管在房间内的布置方式。然后将整个供暖房间抽象为计算
模型,利用数值计算软件 fluent来模拟本供暖房间的升降温过程。通过对计
算结果的分析证明了该供暖方式的可行性。最后对分户燃气采暖方式与其他
采暖方式相比在经济上的优越性做了简要的分析。
关键词:燃气采暖;数值模拟;可行性:经济性分折
哈尔滨[程大学项七学位论文
Abstract
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 th
growing need of heating comfortably. At the same time, the people who are not in
the traditional re ions 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 boilers poor ability of energy using
electricitys high value, the nations 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 rooms 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
Key words: gas fired heat-supply; simulating: possibility; economical effect