提出了一个术语“绿色供热系统”，并阐述了它应有的特征。为此，介绍了可逆型供热系统的概念和一般化供热系统模型。为了界定绿色供热系统，使用了作者设计的《单耗分析》的理论和方法。基于绿色供热系统所界定的原则，把排放物的量和有害成分大幅度地降下来的供热方案具有现实的可行性，如再与诸如蒸馏法海水淡化等技术相结合，不但具有可持续的发展空间，单就其可能产生的水量、水质以及造水成本而言，均堪与流域调水方案相竞争。

Nowadays a topic of most concern is how to protect the global climate change and meet the increasing demand of fresh water. To meet this challenge an intelligent use of energy is urgently needed.

The term “Green Heating System” is synonymous with“Environmentally Friendly Heating System”.This term is academically defined in this paper. To this end the paper introduces the concepts of reversible mode of heating and generalized total heating system which consists of six subsystems, involving three sections, namely “hot end”，“cold end”and “heat generation section”.The exergy - based Specific Consumption Analysis Approach proposed by the author was adopted to quantitatively evaluate the effect of these subsystems on performance of the global system. It is found that emissions caused by heating systems are expected to be enormously reduced as a result of fuel saving potential explored by means of enhancement of exergy efficiencies of the above -mentioned subsystems. In addition, an integration of a large - scale green heating system with sea - water desalination plant will provide an alternative of fresh water supply which could compete with that of water source reallocation projects.