摘要
目的为解决以太阳能、电能、燃气或燃油为能源的分散式热水供应存在的诸多问题,寻求将生活热水供应系统纳入城市热网的供热方案.方法设计一种以户为单位,可以同时供暖和供应热水的新型供热系统型式,并通过实验对其中的热水供应系统运行工况进行分析.结果当热网供水温度或流量逐渐降低时,热水温度随之降低,冷热水温差逐渐减少,热水供应系统的供热量也逐渐减少,当热网的供水温度低于88℃或热网流量低于0.12 m3/h时,热网不能采用单纯的改变供水温度或改变流量的调节方式,热网需辅以其它的调节方式,否则不能满足热水供应系统的需要;当户内热水供应系统用水量减少时,热网流量减少,回水温度升高,供回水温差减小,热网的供热量减小.结论集中供热单户式共用系统热网及户内热水供应运行工况相互影响.
In order to address the critical problems in decentralized hot water supply powered by certain energy such as, solar energy, electricity, natural gas and oil, a heating plan of the integration of living hot water supply and city heating network was put forward. A new kind of heating system that could meet both heating and living hot water supply requirement for the individual resident family was designed. By experimenting, its operation analysis was conducted. The result shows that the individual resident family sharing system of the centralization heating system and the hot water supply in the individual family influenced each other. When the water temperature and its volume in the heating network decreased, hot water temperature did the same, the difference in temperature between cold and hot water became minor and the heating supply of the hot water supply system was reduced. When the water temperature or its volume in the heating network was lower than 88 ℃ and 0.12 m^3/h respectively, the heating network could not adopt single adjusting mode, in which either the supplying water temperature or its volume was changed, and other parameters should be included besides the water temperature and its volume. However, the heating network could not depend only on the water temperature control or the volume control which could not fulfill the demand of hot water supply system. When the volume of hot water supply system in the individual resident family decreased, the volume of the heating network also decreased, and when the returning water temperature rose, the difference in temperature between cold and hot water became minor, and the heating power of the heating network diminished.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
2007年第6期986-989,共4页
Journal of Shenyang Jianzhu University：Natural Science
基金
辽宁省教育厅科技项目(202080717)
关键词
热水供应
集中供热
换热器
供热装置
hot water supply
centralized heating
heat exchanger
heating supply equipment
