为实现工业余热区域供热调峰扩容与高效节能,提出一种基于跨季节地埋管储热的区域供热调峰系统。该系统将跨季节地埋管储热技术与调峰系统协同利用,通过评估典型城市室外气温数据构建热负荷模型,精准确定调峰需求并设计储热体布局,引入吸收式热泵提升地埋管回水水温增大地埋管贡献率,确定系统最佳方案配置,利用费用年值法分析系统不同方案的经济特性。研究表明,改造后系统设计效果显著,系统最佳配置条件下地埋管数为630个,埋管贡献率占总调峰热量需求的40.4%,典型年采暖季总调峰热量2.3×10⁴ GJ,调峰时间为1845 h,满足热用户的调峰最大功率需求12.4 MW,跨季节调峰单位取热量的费用年值比地源热泵低34%,具有可观的经济性,为严寒地区区域供热调峰提供了高效低碳的解决方案。
Abstract
To achieve capacity expansion and energy efficiency in industrial waste heat utilization for district heating peak shaving, a novel peak shaving system incorporating seasonal borehole thermal energy storage （BTES） was proposed. The system synergistically combined seasonal BTES technology with conventional peak shaving methods. Outdoor temperature data from typical cities were evaluated to establish accurate heating load models. Peak shaving demand was precisely determined and optimal BTES layout was designed accordingly. An absorption heat pump was integrated to elevate the return water temperature from BTES, thereby increasing its contribution ratio. The optimal system configuration was determined through comprehensive analysis. Economic performance of different scenarios was evaluated using the annual cost method. As the results, the modified system demonstrated remarkable performance under optimal conditions. The BTES contributed 40.4% of the total peak shaving demand. During a typical heating season, the system provides 2.3×10⁴ GJ of peak shaving heat over 1845 operation hours, successfully meeting the 12.4 MW peak demand. The annual cost per unit heat extraction is 177 RMB/GJ, showing excellent economic feasibility. This system provides an efficient, low-carbon solution for district heating peak shaving in severe cold regions, with particular advantages in industrial waste heat recovery applications.
关键词
跨季节储热 /
余热利用 /
费用年值 /
区域供热 /
调峰
Key words
seasonal thermal energy storage /
waste heat utilization /
annual cost /
regional heating /
peak shaving
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基金
国家重点研发计划（2022YFC3802400）
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