摘要
天然气分布式热电联产系统突破了传统集中式供能系统的效率导向型节能模式,形成了与需求侧强耦合的效果导向型模式。基于分布式热电联产系统的节能机理,以供需两侧电力、热力的动态平衡为立足点,针对"以热定电"和"以电定热"2种通用运行模式及其在不同热电比条件下所处5种可能运行状态,提出了分布式热电联产系统相对于不同参照系统节能率的理论表达式。定性和定量分析表明,参照系统的选择对评估热电联产系统的节能收益至关重要。在热电均衡点,联产系统获得最佳节能收益;然而一旦偏离均衡点,则其节能收益与所处运行状态密切相关。此外,系统原动机类型、所处季节工况亦会影响其节能收益。
The combined heat and power （CHP） system breaks through the efficiency oriented energy-saving mode employed by the conventional centralized power system, and forms an effect oriented mode by coupling both supply and demand sides. Based on the dynamic balance of electricity and heat between the demand and supply sides, with respect to the ＂electricity tracking＂ and ＂heat tracking＂ operational modes as well as the five running statuses with different heat-to-power ratios, this paper proposed the theoretical formula of the primary energy saving ratio for the CHP system while comparing with different reference systems. The qualitative and quantitative analyses show that the selection of the reference system is of vital importance to the evaluation of the energy performance of the CHP system. At the point with electricity and heat equilibrium, the CHP system obtains the best energy-saving benefits. However, when the system deviates from the equilibrium point, its energy performance is closely related to the running status. In addition, the type of the prime movers, seasonal conditions may also affect the overall energy performance.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2015年第17期4430-4438,共9页
Proceedings of the CSEE
基金
国家自然科学基金项目(71403162)
上海市科委部分地方院校能力建设项目(13160501000)~~
关键词
天燃气分布式热电联产
节能收益
热电比
combined heat and power
energy performance
heat-to-power ratio
