为解决分散锅炉、热电联产集中供应工业蒸汽等传统技术手段效率低、污染严重且蒸汽长距离输送困难的问题,本文结合余热回收水汽转换技术以及热电协同技术,设计了基于热电协同的工业供热用户端水汽转换系统流程,并提出了基于分时电价不同时段的运行策略。为了对比热电协同制汽系统与常规制汽系统的能耗与经济性,构建了系统主要部件热力模型以及系统评估模型,并结合EES对福建省某实际工业用热项目进行了计算分析。此外进一步对比了热电协同制汽系统在不同余热品位、需求蒸汽压力以及分时电价下的综合效率和供热成本。结果表明,热电协同制汽系统可以显著降低供热成本,且在余热品位不足、适宜的需求蒸汽压力、更大的峰谷差以及更低的平均电价条件下更能发挥作用。在可再生能源持续发展的背景下,基于热电协同的工业供热用户端水汽转换技术优势突出、应用前景十分广阔。

To address the challenges of low efficiency, high pollution, and difficulties in long-distance steam transportation associated with conventional industrial steam supply methods, such as decentralized boilers and combined heat and power (CHP) systems, this paper integrates waste heat recovery with water-steam conversion and thermoelectric synergy technologies. We propose a water-steam conversion system for industrial heat supply at the user end, based on thermoelectric synergy, and develop operational strategies for different time periods under time-of-use electricity pricing. To compare the energy consumption and economic performance of the thermoelectric synergy steam generation system with conventional steam generation systems, we construct thermodynamic models of the main system components and an evaluation model, performing a case analysis for an industrial heat project in Fujian Province using Engineering Equation Solver (EES). Additionally, we assess the system’s overall efficiency and heating cost performance under varying waste heat levels, required steam pressures, and time-of-use electricity pricing. The results demonstrate that the thermoelectric synergy steam generation system significantly reduces heating costs, particularly under conditions of limited waste heat quality, suitable steam demand pressures, greater peak-to-valley price differences, and lower average electricity prices. In the context of rapid renewable energy development, the proposed thermoelectric synergy-based water-steam conversion technology shows promising advantages and substantial potential for industrial heating applications.

TU833

国家重点基础研究发展计划（973计划）,国家自然科学基金项目（面上项目，重点项目，重大项目）