摘要
在传统的天然气热电联供系统基础上,提出了改进的电、蒸汽、热水联供系统。该改进系统的特点之一是以凝汽器冷却水作为供热水源实现部分或全部利用冷却水余热;特点之二是增加烟气-热水换热器以充分利用烟气余热。应用Cycle-Tempo软件对改进前后的热电联供系统进行了模拟。基于符号(火用)经济学,构建了电、蒸汽、热水联供系统的产品成本分配模型,计算出主要产品电、蒸汽、热水单位(火用)经济成本。通过经济分析,比较了改进方案与传统方案出售电、蒸汽、热水的经济收益,并计算改造投资回收期。通过敏感性分析,讨论了天然气、电、蒸汽和热水的市场价格变化对各产品单位(火用)经济成本、系统的经济收益及对改造投资回收期的影响,验证了(火用)经济分析和经济性分析的结论。
On the basis of a traditional natural gas heat and power cogeneration system,put forward was an improved electricity,steam and hot water cogeneration system. One of the specific features of the system in question is to realize the utilization of a part or the whole of the waste heat of the cooling water in condensers by using the cooling water in the condensers as the heat supply water source and another is to additionally install a flue gas-hot water heat exchanger so as to fully utilize the waste heat from the flue gases. The Cycle-Tempo software was applied to simulate the heat and power cogeneration system before and after the improvement. Based on the symbol exergoeconomics,a model for the product cost distribution of the electricity,steam and hot water cogeneration system was established with the unit economic cost of the main products such as electricity,steam and hot water being calculated. Through a comparison of the economic revenue from the sales of electricity,steam and hot water between the improved version and the traditional one,their cost-effectiveness was analyzed and the investment payback period was also calculated when a simplified modification was adopted. Through the sensitivity analysis,the influence of the changes in the market prices of natural gas,electricity,steam and hot water on the unit exergoeconomic costs of various products,economic revenue of both systems and the simplified modification investment payback period was discussed with the results from both exergoeconomic and economic analysis being verified.
出处
《热能动力工程》
CAS
CSCD
北大核心
2013年第6期573-579,656-657,共7页
Journal of Engineering for Thermal Energy and Power
基金
国家自然科学基金青年基金项目(51006025)
广州经济技术开发区科技计划项目(2011Q-P046)
