Article(id=1154429760768828282, tenantId=1146029695717560320, journalId=1146119893612605453, issueId=1154429758340326256, articleNumber=null, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1681747200000, receivedDateStr=2023-04-18, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1753167103235, onlineDateStr=2025-07-22, pubDate=1718812800000, pubDateStr=2024-06-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1753167103235, onlineIssueDateStr=2025-07-22, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1753167103235, creator=13701087609, updateTime=1753167103235, updator=13701087609, issue=Issue{id=1154429758340326256, tenantId=1146029695717560320, journalId=1146119893612605453, year='2024', volume='42', issue='6', pageStart='710', pageEnd='852', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1753167102656, creator=13701087609, updateTime=1753694592332, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1156642210440401438, tenantId=1146029695717560320, journalId=1146119893612605453, issueId=1154429758340326256, language=EN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1156642210440401439, tenantId=1146029695717560320, journalId=1146119893612605453, issueId=1154429758340326256, language=CN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=732, endPage=739, ext={EN=ArticleExt(id=1154429761284727676, articleId=1154429760768828282, tenantId=1146029695717560320, journalId=1146119893612605453, language=EN, title=Influence of heat storage on energy efficiency improvement of medium-deep coaxial borehole heating systems, columnId=null, journalTitle=Renewable Energy Resources, columnName=null, runingTitle=null, highlight=null, articleAbstract=
Aiming at the longterm operation of the mediumdeep coaxial borehole heating system which has issues of cold accumulation in rocksoil and decrease in the heat extraction capacity of the system, in this research, a numerical heat transfer model for MDGSHPs was established, the governing equations were discretized based on the finite difference method, and the accuracy of the model was verified with experimental data. This research separately studied the effects of heat storage temperature (Tin) and flow rate of hot water injection (G) on BHE heat extraction rate (Q), system energy consumption(W) and the coefficient of system performance (CSP) in the next heating period. The results show that the first step to realize heat storage is to determine the threshold value for the temperature of heat storage water. Below the threshold, heat storage will not be achieved, and the threshold temperature for this study is 50 °C. After operating for 500 hours, when the inlet water temperature increases from 50 °C to 80 °C, Q, W and CSP increase by 54.41 kW, 8.96 kW and 0.17. Furthermore, when the flow rate of hot water injection increases from 1 kg/s to 7 kg/s, the growth rate of Q, W and CSP are 7.71%, 6.34% and 1.19%. Therefore, a small flow rate with high temperature of heat storage water is recommended during the heat storage period which will improve heat storage effect and reduce energy consumption. This study provides a theoretical basis for heat storage in MDGSHPs.
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针对中深层套管式地埋管供热系统长期运行存在地下岩土冷堆积、系统取热能力下降等问题,文章建立了中深层套管式地埋管换热器传热数值模型,基于有限差分法对控制方程进行离散,采用实验数据验证模型的准确性。分别研究了储热水温以及储热水质量流量对次年供暖季地埋管取热功率、系统能耗和系统能效的影响。研究结果表明:储热首先应确定储热水温的阈值,进口水温低于阈值将无法实现向岩土储热,该研究工况下的储热水温阈值为50℃,运行500h后,当进口水温从50 ℃增加到80℃时,取热功率、系统能耗、能效分别提高 54.41 kW,8.96 kW,0.17;当储热水质量流量从1 kg/s 提高到7 kg/s 时,取热功率、系统能耗、能效分别提高 7.71%,6.34%, 1.19%。因此,建议采用小流量高水温进行储热,能够提高储热效果并减少能耗。该研究为中深层地源热泵系统储热提供理论基础。
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2 Building Energy-Saving Engineering Technology Center Hefei 230601 China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1154429810236449011, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, authorId=1154429810089648364, language=CN, stringName=苗艳妹, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1 哈尔滨工业大学 建筑学院,寒地城乡人居环境科学与技术工业和信息化部重点实验室 黑龙江 哈尔滨 150090)])])], keywords=[Keyword(id=1154429810756542728, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=EN, orderNo=1, keyword=medium-deep geothermal energy), Keyword(id=1154429810832040205, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=EN, orderNo=2, keyword=coaxial borehole ground source heat pump system), Keyword(id=1154429810894954767, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=EN, orderNo=3, keyword=trans-seasonal heat storage), Keyword(id=1154429810949480724, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=EN, orderNo=4, keyword=system performance), Keyword(id=1154429811045949721, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=EN, orderNo=5, keyword=energy consumption), Keyword(id=1154429811113058586, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=CN, orderNo=1, keyword=中深层地热), Keyword(id=1154429811163390236, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=CN, orderNo=2, keyword=套管式地源热泵系统), Keyword(id=1154429811251470626, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=CN, orderNo=3, keyword=跨季节储热), Keyword(id=1154429811314385190, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=CN, orderNo=4, keyword=系统性能), Keyword(id=1154429811368911145, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=CN, orderNo=5, keyword=能耗)], refs=[Reference(id=1154429814418170295, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, doi=null, pmid=null, pmcid=null, year=2019, volume=19, issue=4, pageStart=23, pageEnd=28, url=null, language=null, rfNumber=[1], rfOrder=0, authorNames=王硕, 黄可钦, 王胜蓝, journalName=制冷与空调, refType=null, unstructuredReference=王硕, 黄可钦, 王胜蓝, 等. 同轴套管式深埋管换热器换热性能研究[J].
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Heat storage principal diagram of MDCBHE, figureFileSmall=S0eBdLK/G+Up9QHOv+X74g==, figureFileBig=PPz/33Am+X9ZTzLaw8nsew==, tableContent=null), ArticleFig(id=1154429812887249262, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=CN, label=图 1, caption=
中深层套管式地埋管换热器原理, figureFileSmall=S0eBdLK/G+Up9QHOv+X74g==, figureFileBig=PPz/33Am+X9ZTzLaw8nsew==, tableContent=null), ArticleFig(id=1154429812971135347, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=EN, label=Fig. 2, caption=
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模型离散网格示意图, figureFileSmall=w7pU2MZIRb+g4atzsn3VeQ==, figureFileBig=cb+r34FjcDulsb4SeCxoIg==, tableContent=null), ArticleFig(id=1154429813130518901, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=EN, label=Fig. 3, caption=
Effect of ${T}_{\text{in }}$ on heat extraction rate of BHE during the heating period, figureFileSmall=r0+QX+eyfMx8DB+pYJSong==, figureFileBig=X7LQurPh+2PAKR3gOWqscA==, tableContent=null), ArticleFig(id=1154429813201822072, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=CN, label=图 3, caption=
储热水温对地埋管换热器取热功率影响, figureFileSmall=r0+QX+eyfMx8DB+pYJSong==, figureFileBig=X7LQurPh+2PAKR3gOWqscA==, tableContent=null), ArticleFig(id=1154429813285708160, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=EN, label=Fig. 4, caption=
Temperature distribution of subsurface rock-soil, figureFileSmall=DIdYzZAqLtLaGcI8+XkbVA==, figureFileBig=SscC53rIE+qBSQZ9Z2C7JQ==, tableContent=null), ArticleFig(id=1154429813352817027, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=CN, label=图 4, caption=
地下岩土温度分布, figureFileSmall=DIdYzZAqLtLaGcI8+XkbVA==, figureFileBig=SscC53rIE+qBSQZ9Z2C7JQ==, tableContent=null), ArticleFig(id=1154429813424120199, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=EN, label=Fig. 5, caption=
Effect of ${T}_{\text{in }}$ on energy consumption during the heating period, figureFileSmall=NMbO0LuQ0xJpcc78c9i8uA==, figureFileBig=GoyQy4TRHLPiUG1e/4zS2w==, tableContent=null), ArticleFig(id=1154429813478646155, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=CN, label=图 5, caption=
储热水温对系统能耗影响, figureFileSmall=NMbO0LuQ0xJpcc78c9i8uA==, figureFileBig=GoyQy4TRHLPiUG1e/4zS2w==, tableContent=null), ArticleFig(id=1154429813528977806, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=EN, label=Fig. 6, caption=
Effect of ${T}_{\text{in }}$ on coefficient of system performance during the heating period, figureFileSmall=ceUAeEb0Sl2RFEfOkb2f+w==, figureFileBig=Lmc+rBs9pnsZs/pchaacuw==, tableContent=null), ArticleFig(id=1154429813596086675, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=CN, label=图 6, caption=
储热水温对系统能效影响, figureFileSmall=ceUAeEb0Sl2RFEfOkb2f+w==, figureFileBig=Lmc+rBs9pnsZs/pchaacuw==, tableContent=null), ArticleFig(id=1154429813671584151, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=EN, label=Fig. 7, caption=
Effect of $G$ on the heat extraction rate of BHE during the heating period, figureFileSmall=QYxhad6SNwIAATklN+FEBw==, figureFileBig=W4nEH2RrAUS0jeXCUkSAJQ==, tableContent=null), ArticleFig(id=1154429813768053149, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=CN, label=图 7, caption=
储热水质量流量对地埋管换热器取热功率影响, figureFileSmall=QYxhad6SNwIAATklN+FEBw==, figureFileBig=W4nEH2RrAUS0jeXCUkSAJQ==, tableContent=null), ArticleFig(id=1154429813839356321, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=EN, label=Fig. 8, caption=
Effect of $G$ on energy consumption during the heating period, figureFileSmall=75ZcMyHyXkhgEQWDOAW7Ag==, figureFileBig=hkp/Z2NoZpp6Y4JAwB07KQ==, tableContent=null), ArticleFig(id=1154429813931631013, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=CN, label=图 8, caption=
储热水质量流量对系统能耗影响, figureFileSmall=75ZcMyHyXkhgEQWDOAW7Ag==, figureFileBig=hkp/Z2NoZpp6Y4JAwB07KQ==, tableContent=null), ArticleFig(id=1154429813998739880, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=EN, label=Fig. 9, caption=
Effect of $G$ on coefficient of system performance during the heating period, figureFileSmall=l5E40GOkFLYWEqaFQ0P78g==, figureFileBig=izJCWXx9g1kuXy3owIZT2Q==, tableContent=null), ArticleFig(id=1154429814061654444, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=CN, label=图 9, caption=
储热水质量流量对系统能效影响, figureFileSmall=l5E40GOkFLYWEqaFQ0P78g==, figureFileBig=izJCWXx9g1kuXy3owIZT2Q==, tableContent=null), ArticleFig(id=1154429814111986095, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=EN, label=Table 1, caption=
Setting of system basic parameters, figureFileSmall=null, figureFileBig=null, tableContent=
| 物理参数 | 数值 |
| 井孔深度 $H/\mathrm{m}$ | 2000 |
| 井孔直径 ${d}_{\mathrm{b}}/\mathrm{m}$ | 0.28 |
| 模拟深度 ${H}_{\mathrm{m}}/\mathrm{m}$ | 2 200 |
| 外管内径 ${d}_{\mathrm{{li}}}/\mathrm{m}$ | 0.177 04 |
| 外管外径 ${d}_{1\mathrm{o}}/\mathrm{m}$ | 0.1937 |
| 外管导热系数 ${k}_{1}/\mathrm{W} \cdot {\left( \mathrm{m} \cdot \mathrm{K}\right) }^{-1}$ | 41 |
| 外管定容比热 ${\rho }_{1}{c}_{1}/\mathrm{J} \cdot \left( {{\mathrm{m}}^{-3} \cdot {\mathrm{K}}^{-1}}\right)$ | ${3.8} \times {10}^{6}$ |
| 内管内径 ${d}_{2\mathrm{i}}/\mathrm{m}$ | 0.1022 |
| 内管外径 ${d}_{2\mathrm{o}}/\mathrm{m}$ | 0.125 |
| 内管导热系数 ${k}_{2}/\mathrm{W} \cdot {\left( \mathrm{m} \cdot \mathrm{K}\right) }^{-1}$ | 0.4 |
| 内管定容比热 ${\rho }_{2}{c}_{2}/\mathrm{J} \cdot \left( {{\mathrm{m}}^{-3} \cdot {\mathrm{K}}^{-1}}\right)$ | ${2.2} \times {10}^{6}$ |
| 水运动粘度 $v/{\mathrm{m}}^{2} \cdot {\mathrm{s}}^{-1}$ | ${8.05} \times {10}^{-7}$ |
| 地表温度 ${t}_{\mathrm{a}}/{}^{ \circ }\mathrm{C}$ | 10 |
| 地层对流换热系数 [ 20 ] | 15 |
| 回填材料定容比热 ${\rho }_{\mathrm{g}}{c}_{\mathrm{g}}/\mathrm{J} \cdot \left( {{\mathrm{m}}^{-3} \cdot {\mathrm{K}}^{-1}}\right)$ | ${2.5} \times {10}^{6}$ |
| 大地热流 ${q}_{\mathrm{g}}/\mathrm{W} \cdot {\mathrm{m}}^{-2}$ | ${7.5} \times {10}^{-2}$ |
| 地温梯度 ${q}_{\mathrm{t}}/\mathrm{C} \cdot \left( {{10}^{-2} \cdot {\mathrm{m}}^{-1}}\right)$ | 3 |
), ArticleFig(id=1154429814204260786, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154429760768828282, language=CN, label=表 1, caption=
系统基本参数的设定, figureFileSmall=null, figureFileBig=null, tableContent=
| 物理参数 | 数值 |
| 井孔深度 $H/\mathrm{m}$ | 2000 |
| 井孔直径 ${d}_{\mathrm{b}}/\mathrm{m}$ | 0.28 |
| 模拟深度 ${H}_{\mathrm{m}}/\mathrm{m}$ | 2 200 |
| 外管内径 ${d}_{\mathrm{{li}}}/\mathrm{m}$ | 0.177 04 |
| 外管外径 ${d}_{1\mathrm{o}}/\mathrm{m}$ | 0.1937 |
| 外管导热系数 ${k}_{1}/\mathrm{W} \cdot {\left( \mathrm{m} \cdot \mathrm{K}\right) }^{-1}$ | 41 |
| 外管定容比热 ${\rho }_{1}{c}_{1}/\mathrm{J} \cdot \left( {{\mathrm{m}}^{-3} \cdot {\mathrm{K}}^{-1}}\right)$ | ${3.8} \times {10}^{6}$ |
| 内管内径 ${d}_{2\mathrm{i}}/\mathrm{m}$ | 0.1022 |
| 内管外径 ${d}_{2\mathrm{o}}/\mathrm{m}$ | 0.125 |
| 内管导热系数 ${k}_{2}/\mathrm{W} \cdot {\left( \mathrm{m} \cdot \mathrm{K}\right) }^{-1}$ | 0.4 |
| 内管定容比热 ${\rho }_{2}{c}_{2}/\mathrm{J} \cdot \left( {{\mathrm{m}}^{-3} \cdot {\mathrm{K}}^{-1}}\right)$ | ${2.2} \times {10}^{6}$ |
| 水运动粘度 $v/{\mathrm{m}}^{2} \cdot {\mathrm{s}}^{-1}$ | ${8.05} \times {10}^{-7}$ |
| 地表温度 ${t}_{\mathrm{a}}/{}^{ \circ }\mathrm{C}$ | 10 |
| 地层对流换热系数 [ 20 ] | 15 |
| 回填材料定容比热 ${\rho }_{\mathrm{g}}{c}_{\mathrm{g}}/\mathrm{J} \cdot \left( {{\mathrm{m}}^{-3} \cdot {\mathrm{K}}^{-1}}\right)$ | ${2.5} \times {10}^{6}$ |
| 大地热流 ${q}_{\mathrm{g}}/\mathrm{W} \cdot {\mathrm{m}}^{-2}$ | ${7.5} \times {10}^{-2}$ |
| 地温梯度 ${q}_{\mathrm{t}}/\mathrm{C} \cdot \left( {{10}^{-2} \cdot {\mathrm{m}}^{-1}}\right)$ | 3 |
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