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Resistance-capacitance model of the capillary heat exchanger in subway tunnels

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Energy and Built Environment

Energy and Built Environment 2024年第1期5卷 1-8页

作者： Zhen Tong Hao Wu Yiming Guan yongming ji Songtao Hu School of Environmental and Municipal Engineering Qingdao University of TechnologyQingdao 266033China

The subway operation generates a large amount of waste heat,which will lead to a disruption of the underground thermal *** remove the heat,a ground source heat pump system adopting capillary net as the front-end heat exchanger can be built in the tunnels to recycle the waste heat and use it for building *** simulation method was used to analyze the heat transfer process in the tunnel and the surrounding *** existing simulation method usually takes a long time for calculation and can not be used for a real-time regulation of the *** on the concept of thermoelectric analogy,a resistance-capacitance(RC)model was proposed for rapid prediction and analysis on the heat transfer of the capillary net in subway *** annual thermal response in the tunnel was analyzed,and the influence of the tunnel air temperature and the capillary inlet water temperature was examined using this *** maximum heat transfer flux of the capillary in summer(release heat)and in winter(extract heat)was 55.27 W/m 2 and 38.33 W/m 2,*** effect of capillary inlet water temperature was more remarkable than that of the tunnel air temperature on the capillary heat exchange process.

关键词： Subway tunnel Heat pump Capillary heat exchanger Resistance-capacitance model

圆形隧道衬砌内毛细管换热器间歇运行的传热性能

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制冷学报 2024年第2期45卷 53-61页

作者：焦嘉琛季永明张凤君吉程帆尹振峰胡松涛青岛理工大学环境与市政工程学院青岛266520 青岛地铁集团有限公司青岛266001

隧道地源热泵是解决地铁隧道热污染的有效技术之一,毛细管换热器(CHE)因具有抗腐蚀、易弯曲、换热性能好、节省空间等优点被广泛应用于隧道地源热泵系统的前端换热器。基于示范工程建立了CHE流-热耦合传热模型,并在TRNSYS平台搭建CHE仿... 详细信息

隧道地源热泵是解决地铁隧道热污染的有效技术之一,毛细管换热器(CHE)因具有抗腐蚀、易弯曲、换热性能好、节省空间等优点被广泛应用于隧道地源热泵系统的前端换热器。基于示范工程建立了CHE流-热耦合传热模型,并在TRNSYS平台搭建CHE仿真系统,对隧道衬砌内CHE在连续、间歇运行下的传热性能进行分析。结果显示,当运行时间比由1/3逐渐增至1时,制冷季和采暖季第7日的CHE日均热流密度分别由100.59、87.42 W/m^(2)降至78.14、68.62 W/m^(2),相应的围岩内表面温度分别随之增大和减小,表明间歇运行能显著提高换热器的传热性能,并有助于缓解隧道围岩冷热堆积问题。

关键词：可再生能源热泵毛细管间歇运行传热性能

Study on the conversion coefficient between ACH_(50)and ACH in typical zones of public buildings

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Energy and Built Environment

Energy and Built Environment 2023年第4期4卷 408-417页

The air infiltration of buildings is closely related to its indoor and outdoor environment and energy ***,measuring air infiltration of a building under natural conditions is time-consuming,easily affected and expensive,so it’s often inferred based on building airtightness in practical *** models can nevertheless make a rapid prediction without building parameters,which are widely applied in practical *** present,most of the existing empirical models take residential buildings as objects,therefore they are difficult to be applied to public ***,it is imperative to build an empirical model applicable to public *** this study,the conversion coefficients between the airtightness(air change rate under the pressure difference of 50Pa)and the air infiltration rates under natural conditions of four typical zones of public buildings were ***,the airtightness of four zones of public buildings in the cold region of China was ***,their air infiltration rates under 1800 combined conditions of wind pressure and stack effect pressure were simulated based on the airtightness measured ***,calculation and statistical analysis of the conversion coefficient were carried out based on the measured and simulated results,and the recommended value of conversion coefficient was *** results show that the CC of each zone is significantly affected by outdoor meteorological conditions and varies in a wide range(1#zone:3.21 to 188.44).It is advised to ignore the extreme data and take the mean value of the CC corresponding to 95%of the data volume as the recommended value(22.2).This study can provide theoretical basis for the formulation of standards for the performance evaluation of building airtightness.

关键词： Conversion coefficient Airtightness Air infiltration Energy Indoor air quality

Prediction model of air infiltration in single-zone buildings with high airtightness

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Energy and Built Environment

Energy and Built Environment 2023年第6期4卷 653-668页

Air infiltration through building envelopes has a considerable impact on the comprehensive performance of build-ings,especially in terms of their energy demand and indoor air ***,it is important to accurately predict building air infiltration rates under various *** airtightness is one of the typical character-istics of passive ultra-low energy *** the rapid application of passive technology in building energy efficiency,the airtightness of new urban buildings has been significantly *** centralized air leakage path distribution assumption of current prediction model for building air infiltration rate is inconsistent with the actual situation of high airtightness buildings,which reduces its prediction accuracy and application ***,it is of great practical significance and academic value to carry out the research on the prediction model of air infiltration rate of buildings with high *** paper presents an air infiltration prediction model for single-zone buildings with adventitious *** building envelope was broken down into permeable parts and impermeable parts,and the air leakage path-ways were assumed to be uniformly and continuously distributed in the permeable envelope.A linear pressure distribution over the building facade was assumed,and the airflow rate was integrated in the vertical and hori-zontal planes to theoretically predict the air infiltration *** feasibility of the proposed model was tested by comparing the air infiltration rates simulated by this model with those determined using the tracer gas attenua-tion method of an airtight *** initial test results suggest that this model is mathematically robust and is capable of modeling the air infiltration of a building in a wide variety of *** agreement was found between the tested and simulated *** study can provide basic theoretical support for the coupling performance analysis of high air

关键词： Prediction model Air infiltration Airtightness Natural ventilation Modeling

渗流对地铁源热泵前端毛细管换热器性能及围岩温度场的影响

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青岛理工大学学报 2024年第2期45卷 125-132页

作者：季永明綦浩宇吉程帆焦嘉琛尹振峰胡松涛青岛理工大学环境与市政工程学院青岛266525

地铁长期运行会引起隧道内的热堆积,影响地铁的安全高效运行。以毛细管为前端换热器的地铁源热泵系统是解决上述问题的有效技术之一。基于某示范工程,建立了隧道衬砌内毛细管换热器仿真模型;分析了典型工况下,渗流对其传热特性及隧道围... 详细信息

地铁长期运行会引起隧道内的热堆积,影响地铁的安全高效运行。以毛细管为前端换热器的地铁源热泵系统是解决上述问题的有效技术之一。基于某示范工程,建立了隧道衬砌内毛细管换热器仿真模型;分析了典型工况下,渗流对其传热特性及隧道围岩温度场的影响。结果显示,渗流会显著扩大换热器的热影响范围,最远可达围岩下游70 m处;与无渗流工况相比,渗流可显著提高换热器的效率,且二者逆流时,提升效果更明显,供冷季为3.20倍,供暖季为2.55倍;渗流可显著减弱围岩的热堆积。本研究可为地铁源热泵前端换热器的设计提供理论支撑。

关键词：地铁热堆积供热换热器渗流热泵

土壤源热泵与太阳能复合系统集热器面积计算方法改进

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太阳能学报 2016年第4期37卷 912-916页

作者：季永明端木琳大连理工大学建设工程学部大连116024

在对研究中常用的太阳能保证率法、土壤热平衡法的优缺点进行分析的基础上,将系统运行模式、土壤自然恢复能力、经济性因素考虑在内,提出改进的热平衡法。采用TRNSYS模拟软件对改进的热平衡法在保持土壤蓄、放热平衡方面的效果进行验证... 详细信息

在对研究中常用的太阳能保证率法、土壤热平衡法的优缺点进行分析的基础上,将系统运行模式、土壤自然恢复能力、经济性因素考虑在内,提出改进的热平衡法。采用TRNSYS模拟软件对改进的热平衡法在保持土壤蓄、放热平衡方面的效果进行验证。结果显示,改进热平衡法相应复合式系统15 a连续运行后土壤温降(0.38℃)较原方法(0.99℃)减小,改进法在保持土壤蓄、放热平衡方面的效果更好。

关键词：太阳能土壤源热泵集热面积方法改进

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某近零能耗建筑空气渗透量数值分析

建筑科学 2019年第10期35卷 29-35页

作者：季永明端木琳青岛理工大学环境与市政工程学院山东青岛266033 大连理工大学土木工程学院建筑环境与设备研究所辽宁大连116024

高气密性是近零能耗建筑的典型特征之一。目前,国内缺少对于近零能耗建筑气密性影响的研究。本研究以某一近零能耗建筑为对象,基于其气密性实测数据,模拟了其在1800个风压与热压组合工况下的空气渗透量及内压力,并对模拟结果进行了统计... 详细信息

高气密性是近零能耗建筑的典型特征之一。目前,国内缺少对于近零能耗建筑气密性影响的研究。本研究以某一近零能耗建筑为对象,基于其气密性实测数据,模拟了其在1800个风压与热压组合工况下的空气渗透量及内压力,并对模拟结果进行了统计分析与讨论。结果显示,该近零能耗建筑在自然状态下的空气渗透量很小,最大换气次数为0.148 h^-1;建筑内压力变化范围为-26.22 Pa至5.97 Pa,且绝对值高于6 Pa的工况占比高达52%。结果表明,虽然高气密性建筑空气渗透量对其能耗、室内空气品质影响较小,但内压力影响较大,在通风空调系统设计及运行时,应充分考虑其影响。

关键词：空气渗透近零能耗建筑能耗空气品质

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盐酸氨溴索治疗小儿支气管炎的临床效果评价

中国继续医学教育 2015年第13期7卷 168-169页

作者：齐永明黑龙江省同江市人民医院 156400

目的探究盐酸氨溴索治疗小儿支气管炎的临床效果。方法选取我院收治的58例支气管炎患儿,随机分为实验组与参照组,各29例。参照组患儿采取综合常规治疗,实验组在参照组的治疗基础上加用盐酸氨溴索治疗。结果实验组患儿治疗总有效率为93.1... 详细信息

目的探究盐酸氨溴索治疗小儿支气管炎的临床效果。方法选取我院收治的58例支气管炎患儿,随机分为实验组与参照组,各29例。参照组患儿采取综合常规治疗,实验组在参照组的治疗基础上加用盐酸氨溴索治疗。结果实验组患儿治疗总有效率为93.10%,参照组治疗总有效率为75.86%,实验组高于参照组,P<0.05,差异具有统计学意义;实验组患儿咳嗽、气喘等症状的消退时间均短于参照组,P<0.05,差异具有统计学意义。结论盐酸氨溴索治疗小儿支气管炎效果显著,可以有效缩短患儿咳嗽、气喘等症状消退的时间。

关键词：盐酸氨溴索小儿支气管炎临床效果症状消退

太阳能辅助地埋管地源热泵复合系统过渡季运行模式

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暖通空调 2017年第10期47卷 127-131页

作者：季永明端木琳大连理工大学

对比了太阳能辅助地埋管地源热泵复合系统在过渡季利用太阳能进行土壤蓄热时,定时蓄热与随时蓄热2种运行模式下蓄热子系统的热利用效率。给出了复合系统过渡季2种模式下蓄热子系统主要设备参数的确定方法。在TRNSYS平台搭建了蓄热子系... 详细信息

对比了太阳能辅助地埋管地源热泵复合系统在过渡季利用太阳能进行土壤蓄热时,定时蓄热与随时蓄热2种运行模式下蓄热子系统的热利用效率。给出了复合系统过渡季2种模式下蓄热子系统主要设备参数的确定方法。在TRNSYS平台搭建了蓄热子系统仿真模型,模拟了不同太阳能集热器面积下系统的蓄热情况。根据模拟结果对2种蓄热运行模式下子系统的蓄热效率进行了评价。

关键词：太阳能地埋管地源热泵复合系统过渡季蓄热运行模式