Article(id=1174385908901097719, tenantId=1146029695717560320, journalId=1146123222451335185, issueId=1174385906053165285, articleNumber=1671-1807(2025)14-0064-08, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1739635200000, receivedDateStr=2025-02-16, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1757925019717, onlineDateStr=2025-09-15, pubDate=1753372800000, pubDateStr=2025-07-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1757925019717, onlineIssueDateStr=2025-09-15, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1757925019717, creator=13701087609, updateTime=1757925019717, updator=13701087609, issue=Issue{id=1174385906053165285, tenantId=1146029695717560320, journalId=1146123222451335185, year='2025', volume='25', issue='14', pageStart='1', pageEnd='286', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1757925019038, creator=13701087609, updateTime=1758072769121, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1175005614947316471, tenantId=1146029695717560320, journalId=1146123222451335185, issueId=1174385906053165285, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1175005614947316472, tenantId=1146029695717560320, journalId=1146123222451335185, issueId=1174385906053165285, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=64, endPage=71, ext={EN=ArticleExt(id=1174385909605740797, articleId=1174385908901097719, tenantId=1146029695717560320, journalId=1146123222451335185, language=EN, title=Research and Application of Optimisation Strategies for Medium and Deep Geothermal Energy Cascade Utilization for Heating System, columnId=1151876674645226399, journalTitle=Science Technology and Industry, columnName=Technology Innovation, runingTitle=null, highlight=null, articleAbstract=
Medium-depth geothermal energy is one of the important clean heating energy sources because of its large heat storage capacity, good stability and wide distribution range. When using medium-depth geothermal energy for heating, considering that a certain amount of cold build-up will be generated at the bottom of the medium-depth buried pipe, the stratum heat supply capacity will continue to decay with time, i.e., the water supply temperature of the geothermal wells will be gradually reduced with the extension of time. Especially in the uninterrupted heating operation mode, the stratum heat recovery capacity is limited, how to maintain a constant heat load at the user's end under the variable temperature heating condition at the ground source side has become an urgent problem to be solved. A single heating strategy is difficult to meet the heat load demand under the variable temperature heating condition of geothermal wells, therefore, the optimisation strategy of gradient heating was proposed, which could maximize the extraction of stratum heat, convert low-grade heat source into high-grade heat source, improve the efficiency of heat extraction and reduce the operating cost at the same time compared with the former. Finally, the application and analysis of the heating strategy were combined with the pilot demonstration project of medium and deep geothermal energy building heating in CCTEG Xi’an Research Institute(Group) Co. Ltd.. The results show that the the average energy consumption of the heating system for the full heating season is 57.2 kW, and the average energy-efficiency Ratio is 21.16, which has certain guiding significance for the efficient heating application of medium and deep geothermal energy.
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中深层地热能具有热储量大、稳定性好以及分布范围广的优点,是重要的清洁供暖能源之一。利用中深层地热能进行供暖时,考虑到中深层地埋管底部会产生一定量的冷堆积,地层供热能力会随时间的延长而不断衰减,即地热井的出水温度会随着时间的延长而逐步降低。尤其在不间断供暖运行模式下,地层热恢复能力有限,如何在地源侧变温供热工况下维持用户末端恒定的热负荷成为亟须解决的难题。单一的供暖策略难以满足地热井变温供热工况下的热负荷需求,因此提出梯级利用供暖优化策略,相较于前者能最大化提取地层热量,将低品位热源转化为高品位热源,提高取热效率的同时降低运行成本。最后结合中煤科工西安研究院(集团)有限公司中深层地热能建筑供热试点示范项目进行供暖策略应用与分析,结果表明,全供暖季供暖系统平均能耗为57.2 kW,平均系统能效比为21.16,对中深层地热能高效供暖应用具有一定的指导意义。
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刘成路(1996—),男,山东济宁人,硕士,助理工程师,研究方向为地热能开发利用。
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胡振阳(1976—),男,内蒙古赤峰人,硕士,高级工程师,研究方向为地热能开发利用;
赵永哲(1977—),男,陕西西安人,博士,高级研究员,研究方向为地热能开发利用;
苟立(1991—),男,陕西西安人,博士,工程师,研究方向为地热能开发利用。
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1 CCTEG Xi’an Research Institute (Group) Co. Ltd., Xi’an 710065, China
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1 中煤科工西安研究院(集团)有限公司, 西安 710065
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胡振阳(1976—),男,内蒙古赤峰人,硕士,高级工程师,研究方向为地热能开发利用;
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胡振阳(1976—),男,内蒙古赤峰人,硕士,高级工程师,研究方向为地热能开发利用;
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1 CCTEG Xi’an Research Institute (Group) Co. Ltd., Xi’an 710065, China
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1 中煤科工西安研究院(集团)有限公司, 西安 710065
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1 中煤科工西安研究院(集团)有限公司, 西安 710065)]), AuthorCompany(id=1175128479063491568, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1174385908901097719, xref=2, ext=[AuthorCompanyExt(id=1175128479067685873, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1174385908901097719, companyId=1175128479063491568, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2 西安煤科地热能开发有限公司, 西安 710065)])]), Author(id=1175128479629722624, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1174385908901097719, orderNo=2, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1175128479709413378, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1174385908901097719, authorId=1175128479629722624, language=EN, stringName=Yongzhe ZHAO, firstName=Yongzhe, middleName=null, lastName=ZHAO, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1 CCTEG Xi’an Research Institute (Group) Co. Ltd., Xi’an 710065, China
2 Xi’an Coal Science Geothermal Energy Development Co. Ltd., Xi’an 710086, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1175128479789105155, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1174385908901097719, authorId=1175128479629722624, language=CN, stringName=赵永哲, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, address=
1 中煤科工西安研究院(集团)有限公司, 西安 710065
2 西安煤科地热能开发有限公司, 西安 710065, bio={"content":"
赵永哲(1977—),男,陕西西安人,博士,高级研究员,研究方向为地热能开发利用;
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赵永哲(1977—),男,陕西西安人,博士,高级研究员,研究方向为地热能开发利用;
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2 西安煤科地热能开发有限公司, 西安 710065)])]), Author(id=1175128479852019717, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1174385908901097719, orderNo=3, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1175128479919128584, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1174385908901097719, authorId=1175128479852019717, language=EN, stringName=Li GOU, firstName=Li, middleName=null, lastName=GOU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1 CCTEG Xi’an Research Institute (Group) Co. Ltd., Xi’an 710065, China
2 Xi’an Coal Science Geothermal Energy Development Co. Ltd., Xi’an 710086, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1175128479990431753, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1174385908901097719, authorId=1175128479852019717, language=CN, stringName=苟立, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1 中煤科工西安研究院(集团)有限公司, 西安 710065
2 西安煤科地热能开发有限公司, 西安 710065, bio={"content":"
苟立(1991—),男,陕西西安人,博士,工程师,研究方向为地热能开发利用。
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苟立(1991—),男,陕西西安人,博士,工程师,研究方向为地热能开发利用。
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1 中煤科工西安研究院(集团)有限公司, 西安 710065)]), AuthorCompany(id=1175128479063491568, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1174385908901097719, xref=2, ext=[AuthorCompanyExt(id=1175128479067685873, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1174385908901097719, companyId=1175128479063491568, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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全供暖季系统能效比, figureFileSmall=Dc4Xxto9Qjbtzuk3TLf4DA==, figureFileBig=NosEK1l5ohwVVvpnS7hojw==, tableContent=null), ArticleFig(id=1175128481768816672, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1174385908901097719, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 建筑名称 | 热负荷/kW |
| 科研楼 | 840 |
| 实验检测楼 | 305 |
| 公寓食堂楼 | 267 |
| 6栋工业厂房 | 2 260 |
| 总计 | 3 672 |
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院区末端热负荷
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| 建筑名称 | 热负荷/kW |
| 科研楼 | 840 |
| 实验检测楼 | 305 |
| 公寓食堂楼 | 267 |
| 6栋工业厂房 | 2 260 |
| 总计 | 3 672 |
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| 设备 | 换热量/kW | 一次侧进出/℃ | 二次侧进出/℃ | 设备 | 制热量/kW | 蒸发器进出/℃ | 冷凝器进出/℃ |
| 一级板式换热器 | 1 000 | 53/43 | 40/50 | 一级热泵 | 1 223 | 32/18 | 40/50 |
| 二级板式换热器 | 2 250 | 37/14.7 | 32/9.7 | 二级热泵 | 1 455 | 18/9.7 | 40/50 |
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板式换热器及热泵机组参数
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| 设备 | 换热量/kW | 一次侧进出/℃ | 二次侧进出/℃ | 设备 | 制热量/kW | 蒸发器进出/℃ | 冷凝器进出/℃ |
| 一级板式换热器 | 1 000 | 53/43 | 40/50 | 一级热泵 | 1 223 | 32/18 | 40/50 |
| 二级板式换热器 | 2 250 | 37/14.7 | 32/9.7 | 二级热泵 | 1 455 | 18/9.7 | 40/50 |
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| 梯级利用 | 工况 | 地热井源侧 | 板式换热器 | 热泵机组 | 地热井源侧循环泵 | 用户末端 循环泵 |
| 序号 | 地热井出 水温度T/℃ |
| 一级利用 | 1 | T≥71 | DZ01井 | 一级 | — | DZ01井循环泵 | 1台 |
| 2 | T≥71 | DZ02井 | 一级 | — | DZ02井循环泵 | 1台 |
| 3 | T≥71 | DZ03井 | 一级 | — | DZ03井循环泵 | 1台 |
| 4 | T≥71 | DZ01+DZ02井 | 一级 | — | DZ01+DZ02井循环泵 | 1台 |
| 5 | T≥71 | DZ01+DZ03井 | 一级 | — | DZ01+DZ03井循环泵 | 1台 |
| 6 | T≥71 | DZ02+DZ03井 | 一级 | — | DZ02+DZ03井循环泵 | 1台 |
| 7 | T≥71 | DZ01+DZ02+DZ03井 | 一级 | — | DZ01+DZ02+ DZ03井循环泵 | 1台 |
| 二级利用 | 8 | 71≥T≥53 | DZ01+DZ02+DZ03井 | 一级+二级 | 一级热泵机组(1号或2号) | DZ01+DZ02+ DZ03井循环泵 | 1台 |
| 9 | 71≥T≥53 | DZ01+DZ02+DZ03井 | 一级+二级 | 一级热泵机组(1号+2号) | DZ01+DZ02+ DZ03井循环泵 | 1台 |
| 三级利用 | 10 | 53≥T≥32 | DZ01+DZ02+DZ03井 | 二级 | 一级热泵机组(1号或2号)+ 二级热泵机组(3号) | DZ01+DZ02+ DZ03井循环泵 | 1台 |
| 四级利用 | 11 | 53≥T≥32 | DZ01+DZ02+DZ03井 | 二级 | 一级热泵机组(1号+2号)+ 二级热泵机组(3号) | DZ01+DZ02+ DZ03井循环泵 | 1台 |
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能源站系统地热能梯级利用策略
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| 梯级利用 | 工况 | 地热井源侧 | 板式换热器 | 热泵机组 | 地热井源侧循环泵 | 用户末端 循环泵 |
| 序号 | 地热井出 水温度T/℃ |
| 一级利用 | 1 | T≥71 | DZ01井 | 一级 | — | DZ01井循环泵 | 1台 |
| 2 | T≥71 | DZ02井 | 一级 | — | DZ02井循环泵 | 1台 |
| 3 | T≥71 | DZ03井 | 一级 | — | DZ03井循环泵 | 1台 |
| 4 | T≥71 | DZ01+DZ02井 | 一级 | — | DZ01+DZ02井循环泵 | 1台 |
| 5 | T≥71 | DZ01+DZ03井 | 一级 | — | DZ01+DZ03井循环泵 | 1台 |
| 6 | T≥71 | DZ02+DZ03井 | 一级 | — | DZ02+DZ03井循环泵 | 1台 |
| 7 | T≥71 | DZ01+DZ02+DZ03井 | 一级 | — | DZ01+DZ02+ DZ03井循环泵 | 1台 |
| 二级利用 | 8 | 71≥T≥53 | DZ01+DZ02+DZ03井 | 一级+二级 | 一级热泵机组(1号或2号) | DZ01+DZ02+ DZ03井循环泵 | 1台 |
| 9 | 71≥T≥53 | DZ01+DZ02+DZ03井 | 一级+二级 | 一级热泵机组(1号+2号) | DZ01+DZ02+ DZ03井循环泵 | 1台 |
| 三级利用 | 10 | 53≥T≥32 | DZ01+DZ02+DZ03井 | 二级 | 一级热泵机组(1号或2号)+ 二级热泵机组(3号) | DZ01+DZ02+ DZ03井循环泵 | 1台 |
| 四级利用 | 11 | 53≥T≥32 | DZ01+DZ02+DZ03井 | 二级 | 一级热泵机组(1号+2号)+ 二级热泵机组(3号) | DZ01+DZ02+ DZ03井循环泵 | 1台 |
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| 供暖季 | 平均每月 耗电量/ MWh | 平均能 效比 | 平均运 行成本/ [元·(m2·月)-1] | 平均每月 节省电耗/ MWh |
| 2023—2024年 | 23.05 | 21.16 | 0.30 | 60 |
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供暖季系统能耗
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| 供暖季 | 平均每月 耗电量/ MWh | 平均能 效比 | 平均运 行成本/ [元·(m2·月)-1] | 平均每月 节省电耗/ MWh |
| 2023—2024年 | 23.05 | 21.16 | 0.30 | 60 |
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