中深层地埋管热泵系统供暖源侧参数设计方法
OPTIMUM DESIGN METHOD OF SOURCE SIDE PARAMETER FOR DEEP BOREHOLE GEOTHERMAL HEAT PUMP HEATING SYSTEM
李锦堂 1李骥 1张广秋 1孙宗宇 1朱超 2孔维政3
作者信息
- 1. 中国建筑科学研究院有限公司,北京 100013
- 2. 国网陕西省电力有限公司电力科学研究院,西安 710100
- 3. 国网能源研究院有限公司,北京 102209
- 折叠
摘要
依赖于既有工程经验数据或地埋管换热能力短期测试结果,采用粗放式方法进行中深层地埋管热泵系统源侧设计,导致地埋管系统容量配置不合理,影响热泵系统供暖的可靠性与经济性.为改善地埋管系统设计现状,采用动态仿真手段,同时虑及设计负荷、累计负荷、负荷逐时分布规律,分析长时间维度中深层地埋管地热资源非稳态特性和岩土温度自恢复特性,提出基于地下岩土"终态年度周期性冷热平衡"状态来确定地源侧设计供回水温度,进一步以地源侧全生命期年均成本最低进行最优化计算来确定源侧设计流量的设计方法,并将其应用于某工程项目,实现了地源侧参数的设计优化.
Abstract
Relying on the existing engineering experience data or the short-term heat transfer test results of middle and deep borehole heat exchanger,an extensive method is typically used to design the middle and deep borehole geothermal heat pump heating system.It leads to the unreasonable configuration of the borehole heat exchange system and the reduction of the reliability and economy of heat pump heating system.In order to improve the design status of the middle and deep borehole heat exchange system,a dynamic simulation method is adopted in this paper,considering the design load,cumulative load and hourly load distribution law,to analyze the unsteady characteristics of deep-buried geothermal resources in the long-term dimension and the temperature-self-recovery performance of rock and soil,and determine the designed water supply and return temperature at the source side based on the"annual periodic cooling and heat balance of final state"of underground rock and soil.And optimization method of source-side design flowrate based on the optimization of the average annual life-cycle cost on the ground source side is proposed.Taking an engineering project as an example,the optimization design of source-side parameter is given.
关键词
地热能/中深层同轴套管式地埋管换热器/长期换热性能/年度完全可再生状态/动态仿真Key words
geothermal energy/coaxial deep borehole heat exchanger/long-term heat transfer performance/annual fully renewable status/dynamic simulation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据