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Time-lagged Effects of the Spring Atmospheric Heat Source over the Tibetan Plateau on Summer Precipitation in Northeast China during 1961–2020:Role of Soil Moisture
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作者 Yizhe HAN Dabang JIANG +2 位作者 Dong SI Yaoming MA Weiqiang MA 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2024年第8期1527-1538,共12页
The spring atmospheric heat source(AHS)over the Tibetan Plateau(TP)has been suggested to affect the Asian summer monsoon and summer precipitation over South China.However,its influence on the summer precipitation in N... The spring atmospheric heat source(AHS)over the Tibetan Plateau(TP)has been suggested to affect the Asian summer monsoon and summer precipitation over South China.However,its influence on the summer precipitation in Northeast China(NEC)remains unknown.The connection between spring TP AHS and subsequent summer precipitation over NEC from 1961 to 2020 is analyzed in this study.Results illustrate that stronger spring TP AHS can enhance subsequent summer NEC precipitation,and higher soil moisture in the Yellow River Valley-North China region(YRVNC)acts as a bridge.During spring,the strong TP AHS could strengthen the transportation of water vapor to East China and lead to excessive rainfall in the YRVNC.Thus,soil moisture increases,which regulates local thermal conditions by decreasing local surface skin temperature and sensible heat.Owing to the memory of soil moisture,the lower spring sensible heat over the YRVNC can last until mid-summer,decrease the land–sea thermal contrast,and weaken the southerly winds over the East Asia–western Pacific region and convective activities over the South China Sea and tropical western Pacific.This modulates the East Asia–Pacific teleconnection pattern,which leads to a cyclonic anomaly and excessive summer precipitation over NEC. 展开更多
关键词 Tibetan Plateau atmospheric heat source Northeast China summer precipitation soil moisture
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基于TRNSYS的中深层土壤源供暖系统运行特性分析
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作者 石岩 张清晨 李明奇 《吉林建筑大学学报》 CAS 2024年第2期33-37,共5页
本文针对长春地区某居住建筑,利用TRNSYS软件建立中深层地埋管土壤源热泵系统仿真模型,模拟分析了热泵机组性能系数(简称COP)随地埋管深度和运行年数的变化趋势及岩土导热系数对地埋管出水温度的影响。结果表明,地埋管深度越深,COP随运... 本文针对长春地区某居住建筑,利用TRNSYS软件建立中深层地埋管土壤源热泵系统仿真模型,模拟分析了热泵机组性能系数(简称COP)随地埋管深度和运行年数的变化趋势及岩土导热系数对地埋管出水温度的影响。结果表明,地埋管深度越深,COP随运行年数变化越小,系统运行越趋于稳定。当地埋管深度达到1800 m时,系统运行趋于稳定。在运行初始阶段,地埋管出水温度变化幅度较大。当运行达到750 h时,地埋管出水温度趋于稳定;当热储层岩体导热系数增加2 W/(m·℃),载热流体出口温度由34.1℃增至36.9℃,增加了8.21%,由此可见岩体导热系数对地埋管出水温度的影响显著。 展开更多
关键词 供暖系统 中深层土壤源 TRNsYs 运行特性
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Simulation of embedded heat exchangers of solar aided ground source heat pump system 被引量:1
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作者 王芳 郑茂余 +1 位作者 邵俊鹏 李忠建 《Journal of Central South University》 SCIE EI CAS 2008年第S2期261-266,共6页
Aimed at unbalance of soil temperature field of ground source heat pump system, solar aided energy storage system was established. In solar assisted ground-source heat pump (SAGSHP) system with soil storage, solar ene... Aimed at unbalance of soil temperature field of ground source heat pump system, solar aided energy storage system was established. In solar assisted ground-source heat pump (SAGSHP) system with soil storage, solar energy collected in three seasons was stored in the soil by vertical U type soil exchangers. The heat abstracted by the ground-source heat pump and collected by the solar collector was employed to heating. Some of the soil heat exchangers were used to store solar energy in the soil so as to be used in next winter after this heating period; and the others were used to extract cooling energy directly in the soil by circulation pump for air conditioning in summer. After that solar energy began to be stored in the soil and ended before heating period. Three dimensional dynamic numerical simulations were built for soil and soil heat exchanger through finite element method. Simulation was done in different strata month by month. Variation and restoration of soil temperature were studied. Economy and reliability of long term SAGSHP system were revealed. It can be seen that soil temperature is about 3 ℃ higher than the original one after one year's running. It is beneficial for the system to operate for long period. 展开更多
关键词 sOLAR assisted ground source heat PUMP (AsGsHP) soil storage three DIMENsIONAL simulations heatING and COOLING
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Numerical Simulation of Heat Transfer Characteristics of Horizontal Ground Heat Exchanger in Frozen Soil Layer 被引量:2
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作者 王华军 赵军 《Transactions of Tianjin University》 EI CAS 2007年第3期200-204,共5页
A simplified numerical model of heat transfer characteristics of horizontal ground heat exchanger (GHE) in the frozen soil layer is presented and the steady-state distribution of temperature field is simulated. Numeri... A simplified numerical model of heat transfer characteristics of horizontal ground heat exchanger (GHE) in the frozen soil layer is presented and the steady-state distribution of temperature field is simulated. Numerical results show that the frozen depth mainly depends on the soil′s moisture content and ambient temperature. The heat transfer loss of horizontal GHE tends to grow with the increase of the soil′s moisture content and the decrease of ambient temperature. Backfilled materials with optimal thermal conductivity can reduce the thermal loss effectively in the frozen soil. The applicability of the Chinese national standard “Technical Code for Ground Source Heat Pump (GB 50366-2005)” is verified. For a ground source heat pump project, the feasible layout of horizontal GHE should be determined based on the integration of the soil′s structure, backfilled materials, weather data, and economic analysis. 展开更多
关键词 ground source heat pump horizontal ground heat exchanger frozen soil layer heat transfer
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基于PSO-MSVR的太阳能耦合土壤源热泵系统优化配置
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作者 程君艳 李鹏 +2 位作者 朱子尚 崔钰 赵文升 《动力工程学报》 CAS CSCD 北大核心 2024年第7期1075-1083,1100,共10页
为了优化太阳能耦合土壤源热泵系统(SGSHPS)的配置,以沈阳地区办公建筑为例,基于TRNSYS平台建立了不同运行模式的SGSHPS模型,对比分析不同模式下系统运行30 a后土壤温度不平衡率和系统总能耗;以并联过渡季蓄热模式为对象,对不同的太阳... 为了优化太阳能耦合土壤源热泵系统(SGSHPS)的配置,以沈阳地区办公建筑为例,基于TRNSYS平台建立了不同运行模式的SGSHPS模型,对比分析不同模式下系统运行30 a后土壤温度不平衡率和系统总能耗;以并联过渡季蓄热模式为对象,对不同的太阳能集热系统和地埋管换热器组合方式进行模拟;在保证系统稳定的前提下,以动态费用年值最低为目标,优化太阳能集热器面积和地埋管换热器钻孔数的配置方式;引入粒子群优化-多输出支持向量机回归(PSO-MSVR)算法,使用PSO算法生成MSVR模型参数并寻找最优值。结果表明:与采用传统热平衡法确定的配置方式相比,优化后运行30 a的系统能耗降低379522 kW,节能11.2%,费用年值降低61863元,土壤温度仅上升0.73 K;对于不同的太阳能集热器和地埋管换热器造价,优化后费用年值相较优化前仍有不同程度的节省,且土壤温度均未有较大偏移。 展开更多
关键词 太阳能 土壤源热泵 费用年值 支持向量回归 粒子群优化
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基于TRNSYS模拟的多能源时序互补供暖系统研究
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作者 杨蕾 杜永恒 +3 位作者 王国华 孙旭灿 朱俊超 赵忠涛 《太阳能学报》 EI CAS CSCD 北大核心 2024年第1期87-94,共8页
针对典型气候区(郑州和哈尔滨)不同建筑类型的负荷特点,提出多能源时序互补集中式供暖系统,并对蓄热场的蓄取规律进行模拟分析。通过TRNSYS模拟,对多能源时序互补集中式供暖系统在不同建筑中运行时的蓄热场土壤平均温度、系统运行策略... 针对典型气候区(郑州和哈尔滨)不同建筑类型的负荷特点,提出多能源时序互补集中式供暖系统,并对蓄热场的蓄取规律进行模拟分析。通过TRNSYS模拟,对多能源时序互补集中式供暖系统在不同建筑中运行时的蓄热场土壤平均温度、系统运行策略、能效提升率进行分析。结果表明:土壤平均温度处于动态平衡,公建系统土壤平均温度最高可达65℃;公建及寒冷地区居建系统运行策略均以太阳能直供和蓄热场直供为主要供热方式,地源热泵为辅,严寒地区居建系统运行策略是以地源热泵为主要供热方式,太阳能直供和蓄热场直供为辅;多能源时序互补集中式供暖系统与地源热泵系统相比能效提升明显,公建系统能效可提升90%以上,严寒地区居建系统能效提升59.12%。 展开更多
关键词 太阳能 地源热泵 TRNsYs模拟 能效比 土壤蓄热
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Research on Performance of Ground-Source Heat Pump Double U Underground Pipe Heat Exchange 被引量:1
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作者 Youyin Jing Jing Hou Peng Yang 《Open Journal of Modelling and Simulation》 2013年第1期1-6,共6页
This paper uses FLUENT software building the three-dimensional unsteady state model of ground source heat pump single U and double U underground pipe to study on heat exchange of underground pipe system in the conditi... This paper uses FLUENT software building the three-dimensional unsteady state model of ground source heat pump single U and double U underground pipe to study on heat exchange of underground pipe system in the condition of unsteady state long-term continuous running, analyzes the change of soil temperature filed around underground pipe and performance of underground pipe heat exchange between single U and double U pipe system. The results show that double U pipe system is better than single U system, which can improve unit depth heat exchange efficiency, reduce the number of wells and reduce the initial investment. 展开更多
关键词 Ground-source heat PUMP DOUBLE U UNDERGROUND PIPE heat Exchange soil Temperature Field
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Practical Green’s function for the thermal stress field induced by a heat source in plane thermoelasticity
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作者 Jian HUA Ming DAI 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2020年第4期543-550,共8页
The classical Green’s functions used in the literature for a heat source in a homogeneous elastic medium cannot lead to ?nite remote thermal stresses in the medium,so that they may not work well in practical thermal ... The classical Green’s functions used in the literature for a heat source in a homogeneous elastic medium cannot lead to ?nite remote thermal stresses in the medium,so that they may not work well in practical thermal stress analyses. In this paper, we develop a practical Green’s function for a heat source disposed eccentrically into an elastic disk/cylinder subject to plane deformation. The edge of the disk/cylinder is assumed to be thermally permeable and traction-free. The full thermal stress ?eld induced by the heat source in the disk/cylinder is determined exactly and explicitly via the Cauchy integral techniques. In particular, a very simple formula is obtained to describe the hoop thermal stress on the edge of the disk/cylinder, which may be conveniently useful for analyzing the thermal stresses in microelectronic components. 展开更多
关键词 heat source Green’s function thermal stress finite matrix
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基于TRNSYS的严寒地区地热辅助的空气源热泵系统研究
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作者 黄凯良 侯旭 冯国会 《流体机械》 CSCD 北大核心 2023年第7期83-90,共8页
针对空气源热泵在严寒地区运行能效受室外低温影响较大的问题,本文通过换热器模块把土壤区域换热器与空气源热泵系统并联,设计了地热辅助的空气源热泵系统,并通过TRNSYSY模拟软件对空气源热泵(ASHP)与地热辅助的空气源热泵(AGAASHP)系... 针对空气源热泵在严寒地区运行能效受室外低温影响较大的问题,本文通过换热器模块把土壤区域换热器与空气源热泵系统并联,设计了地热辅助的空气源热泵系统,并通过TRNSYSY模拟软件对空气源热泵(ASHP)与地热辅助的空气源热泵(AGAASHP)系统进行对比分析。模拟结果表明:AGAASHP耦合系统的采暖季平均COP为2.37,供暖水温达到45℃以上,且AGAASHP系统的供热效果优于ASHP系统;同时,通过土壤区域换热器埋管深度的单目标优化设计,耦合系统在保障土壤热平衡和良好供暖效果的基础上,优化了5%比例的埋管深度,在一定程度上节省了系统初投资。耦合系统相对于单空气源系统而言,不仅提高了供热稳定性,且可以解决供暖季最不利工况下空气源热泵适应性不足的问题,更加的高效节能。 展开更多
关键词 空气源热泵 TRNsYs模拟 AGAAsHP系统 土壤热平衡 高效节能
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Exact analytical solution to three-dimensional phase change heat transfer problems in biological tissues subject to freezing
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作者 李方方 刘静 乐恺 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2009年第1期63-72,共10页
Analytically solving a three-dimensional (3-D) bioheat transfer problem with phase change during a freezing process is extremely difficult but theoretically important. The moving heat source model and the Green func... Analytically solving a three-dimensional (3-D) bioheat transfer problem with phase change during a freezing process is extremely difficult but theoretically important. The moving heat source model and the Green function method are introduced to deal with the cryopreservation process of in vitro biomaterials. Exact solutions for the 3-D temperature transients of tissues under various boundary conditions, such as totally convective cooling, totally fixed temperature cooling and a hybrid between them on tissue surfaces, are obtained. Furthermore, the cryosurgical process in living tissues subject to freezing by a single or multiple cryoprobes is also analytically solved. A closed-form analytical solution to the bioheat phase change process is derived by considering contributions from blood perfusion heat transfer, metabolic heat generation, and heat sink of a cryoprobe. The present method is expected to have significant value for analytically solving complex bioheat transfer problems with phase change. 展开更多
关键词 three-dimensional phase change heat transfer problem CRYOsURGERY CRYOPREsERVATION moving heat source model bioheat transfer Green's function analytical solution
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Zoning operation of energy piles to alleviate the soil thermal imbalance of ground source heat pump systems 被引量:2
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作者 Tian You Weitao Zeng 《Energy and Built Environment》 2023年第1期57-63,共7页
Energy piles have attracted increasing interest for application in ground source heat pumps,because it is environment-friendly,energy-efficient,and without additional drilling cost.However,when there is a large dif-fe... Energy piles have attracted increasing interest for application in ground source heat pumps,because it is environment-friendly,energy-efficient,and without additional drilling cost.However,when there is a large dif-ference between the heating and cooling loads,the system will suffer from a soil thermal imbalance which may further decline the system performance and even cause a system failure.A hybrid ground source heat pump sys-tem that integrates auxiliary equipment can solve the problem,however,it needs additional investment and a complicated control strategy.In this paper,the zoning operation of energy piles can effectively improve the tem-perature recovery ability of soil in the energy pile group and thus alleviate the soil thermal imbalance.Specifically,a heating-dominated residential building in Beijing is selected for a case study,with 144 energy piles arranged in a 12×12 layout.An analytical model of the spiral-coil energy pile group with seepage will be adopted,which can consider the groundwater flow,the geometry of spiral coils,and the thermal interaction among different energy piles,achieving high calculation accuracy and fast calculation speed.Based on this analytical energy pile model,a system model will be built to investigate the system performance influenced by different zoning operation strategies.Results show that intensive heat injection into the center of the pile group(Strategy 2 and Strategy 3)or heat extraction from the outer layer of the pile group(Strategy 4)can relieve the cold accumulation.Strategy 2 can relieve the outlet temperature decline from 5.54℃ to 4.46℃ and improve the heating COP from 3.297 to 3.423 compared to the conventional full operation strategy.Although the annual heat pump COP of Strategy 2 is a little lower than that of conventional full operation strategy,Strategy 2 has the shortest unmet heating or cooling time.Therefore,the proposed zoning operation strategy can achieve good system efficiency and excellent system reliability compared to the conventional strategy. 展开更多
关键词 Ground source heat pump Energy pile Zoning operation soil thermal imbalance Cold accumulation
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基于Trnsys的地源热泵+冷却塔复合系统运行特性模拟研究
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作者 王凯鹏 韩永亮 +1 位作者 汪启龙 田烨 《节能》 2023年第3期26-29,共4页
针对夏热冬冷地区地源热泵系统的土壤热堆积问题,以淮南市某建筑为研究对象,通过DeST软件对建筑冷热负荷进行全年逐时模拟分析,完成复合系统容量配置,利用Trnsys软件建立地源热泵+冷却塔复合系统仿真模型,并进行模拟计算。结果显示:系... 针对夏热冬冷地区地源热泵系统的土壤热堆积问题,以淮南市某建筑为研究对象,通过DeST软件对建筑冷热负荷进行全年逐时模拟分析,完成复合系统容量配置,利用Trnsys软件建立地源热泵+冷却塔复合系统仿真模型,并进行模拟计算。结果显示:系统完全满足建筑供热制冷需求,节能效果明显,年节约能耗3.0×10^(6)kWh,实现了地埋管周围岩土体的冷热平衡,全年土壤热不平衡率19.03%,年温度变化率仅为-0.7%。 展开更多
关键词 土壤热堆积 容量配置 地源热泵%PLUs%冷却塔复合系统
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preliminary Analysis of the Effects of Water Penetrat ion on the Soil Temperature Restoration
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作者 Ouyang Leixin 《课程教育研究(学法教法研究)》 2014年第18期13-16,共4页
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光伏光热联合双源热泵系统运行模式研究(1):最佳切换模式验证
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作者 曲明璐 刘锡荣 +1 位作者 王海洋 张斌 《暖通空调》 2024年第8期67-72,80,共7页
讨论了光伏光热联合双源热泵系统制热运行的最佳切换模式。利用TRNSYS软件建立了仿真模型,对双源(水源、空气源)热泵系统性能系数(COP_(s))进行了计算,提出以某时刻空气源热泵模式或水源热泵模式运行COP_(s)较大者优先运行作为COP_(s)... 讨论了光伏光热联合双源热泵系统制热运行的最佳切换模式。利用TRNSYS软件建立了仿真模型,对双源(水源、空气源)热泵系统性能系数(COP_(s))进行了计算,提出以某时刻空气源热泵模式或水源热泵模式运行COP_(s)较大者优先运行作为COP_(s)切换模式。通过前期实验结果验证了模拟结果的正确性,并与常规的集热水箱温度切换模式进行了对比实验,验证了COP_(s)切换模式的有效性。结果表明,该实验系统以COP_(s)最佳切换模式运行时发电量和发电效率较集热水箱温度切换模式分别提高了5.35%和1.73%,耗电量降低了17.03%,COP_(s)提高了4.91%。 展开更多
关键词 光伏光热 双源热泵 空气源热泵 水源热泵 运行模式 切换模式 系统性能系数(COP_(s))
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基于TRNSYS的土壤源热泵热平衡问题的影响因素分析 被引量:34
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作者 花莉 潘毅群 +1 位作者 范蕊 黄治钟 《建筑节能》 CAS 2012年第3期23-29,共7页
夏热冬冷这种冷负荷占优地区,若由土壤源热泵系统承担所有的空调负荷,则会造成全年土壤取放热量的不平衡,从而出现常年运行后土壤温度的逐渐上升,降低系统夏季的运行效率,不利于系统持续稳定高效的运行。为此首先利用模拟软件TRNSYS搭... 夏热冬冷这种冷负荷占优地区,若由土壤源热泵系统承担所有的空调负荷,则会造成全年土壤取放热量的不平衡,从而出现常年运行后土壤温度的逐渐上升,降低系统夏季的运行效率,不利于系统持续稳定高效的运行。为此首先利用模拟软件TRNSYS搭建土壤源热泵系统模型,对土壤源热泵系统长期运行性能进行模拟分析,从冬夏累计负荷比、埋管间距、埋管深度、土壤导热系数、回填料导热系数这几个影响因素出发,研究土壤源热泵长期运行的热平衡问题,以期对土壤源热泵系统的合理应用和发展提供支持。 展开更多
关键词 土壤源热泵系统 TRNsYs 土壤热平衡 影响因素
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间歇运行下地埋管周围土壤热湿特性实验研究
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作者 徐昭 何伟 +3 位作者 王义天 贾臻 邾茂盛 庾汉成 《太阳能学报》 EI CAS CSCD 北大核心 2024年第6期44-50,共7页
搭建地源热泵地埋管周围土壤热湿传递的试验台,对初始含水率、防水层、保温层以及相变回填材料等因素对土壤热量和水分传递的影响进行探究。沙箱实验结果表明:竖直埋管的热量会引起周围土壤的温度传递和水分迁移,土壤初始含水率的提高... 搭建地源热泵地埋管周围土壤热湿传递的试验台,对初始含水率、防水层、保温层以及相变回填材料等因素对土壤热量和水分传递的影响进行探究。沙箱实验结果表明:竖直埋管的热量会引起周围土壤的温度传递和水分迁移,土壤初始含水率的提高有利于温度恢复和地埋管换热,系统运行期间的温度峰值随初始含水率的增加而降低,防水层、保温层和相变回填材料也会对温度峰值和温度恢复产生影响。温度梯度和水力梯度是引起水分迁移的主要因素,在15%初始含水率时,温度梯度占据主导,驱动水分沿径向向远处扩散;在25%初始含水率时,水力梯度占据主导,水分沿深度向下渗透。 展开更多
关键词 地源热泵 土壤温度 土壤湿度 相变材料
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太阳能-土壤源热泵系统(SESHPS)交替运行性能的数值模拟 被引量:37
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作者 杨卫波 施明恒 董华 《热科学与技术》 CAS CSCD 2005年第3期228-232,共5页
针对青岛地区的气象与地质条件,以土壤温度恢复率为指标,对太阳能-土壤源热泵系统(SESHPS)的交替运行性能进行了数值模拟.结果表明:SESHPS以24 h为周期交替运行时,近盘管处土壤温度恢复率取30%~60%为宜,太阳能热泵投入运行的时间比例... 针对青岛地区的气象与地质条件,以土壤温度恢复率为指标,对太阳能-土壤源热泵系统(SESHPS)的交替运行性能进行了数值模拟.结果表明:SESHPS以24 h为周期交替运行时,近盘管处土壤温度恢复率取30%~60%为宜,太阳能热泵投入运行的时间比例应控制在42%~58%,以此可确定出太阳能集热器的面积,为SESHPS的实际工程设计与运行提供了理论参考. 展开更多
关键词 太阳能-土壤源热泵系统 交替运行 土壤温度恢复率
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岩土源热泵在喀斯特地区的应用问题及对策
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作者 王林 陈橙 +1 位作者 毛瑞勇 裴鹏 《地质与资源》 CAS 2024年第1期124-130,共7页
地源热泵目前的主要形式是岩土源热泵.为厘清系统在喀斯特地区应用时影响运行效果的因素,进行了换热试验和工程调研,认为不利的地层岩性和水文地质条件会在一定程度上制约系统的可持续开发利用,空气潜孔锤钻井技术与施工中存在的问题也... 地源热泵目前的主要形式是岩土源热泵.为厘清系统在喀斯特地区应用时影响运行效果的因素,进行了换热试验和工程调研,认为不利的地层岩性和水文地质条件会在一定程度上制约系统的可持续开发利用,空气潜孔锤钻井技术与施工中存在的问题也会使系统不能正常运行.提出了加强基础地质和水文地质调查、地球物理勘察、钻探技术提升及过程管理等建议和对策. 展开更多
关键词 岩土源热泵 喀斯特地区 地热能 碳中和 碳达峰 贵州省
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Spatial heterogeneity and source apportionment of soil metal(loid)s in an abandoned lead/zinc smelter 被引量:8
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作者 Yunxia Zhang Tianshuang Li +5 位作者 Zhaohui Guo Huimin Xie Zhihao Hu Hongzhen Ran Changzhou Li Zhichao Jiang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2023年第5期519-529,共11页
Metal smelting have brought severe metal(loid)s contamination to the soil.Spatial distribution and pollution source analysis for soil metal(loid)s in an abandoned lead/zinc smelter were studied.The results showed that... Metal smelting have brought severe metal(loid)s contamination to the soil.Spatial distribution and pollution source analysis for soil metal(loid)s in an abandoned lead/zinc smelter were studied.The results showed that soil was contaminated heavily withmetal(loid)s.The mean of lead(Pb),arsenic(As),cadmium(Cd),mercury(Hg)and antimony(Sb)content in topsoil is 9.7,8.2,5.0,2.3,and 1.2 times higher than the risk screening value for soil contamination of development land of China(GB36600-2018),respectively.Cd ismainly enriched in the 0–6mdepth of site soil while As and Pbmainly deposited in the 0–4mlayer.The spatial distribution of soil metal(loid)s is significantly correlated with the pollution source in the different functional areas of smelter.As,Hg,Sb,Pb and copper(Cu)were mainly distributed in pyrometallurgical area,while Cd,thallium(Tl)and zinc(Zn)was mainly existed in both hydrometallurgical area and raw material storage area.Soil metal(loid)s pollution sources in the abandoned smelter are mainly contributed to the anthropogenic sources,accounting for 84.5%.Specifically,Pb,Tl,As,Hg,Sb and Cumainly from atmospheric deposition(55.9%),Cd and Zn mainly from surface runoff(28.6%),While nickel(Ni)mainly comes from parent material(15.5%).The results clarified the spatial distribution and their sources in different functional areas of the smelter,providing a new thought for the risk prevention and control of metal(loid)s in polluted site soil. 展开更多
关键词 smelting industry site soil Metal(loid)s spatial heterogeneity source apportionment
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土壤源热泵夏季制冷对土壤碳含量影响的实验研究
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作者 吉文丽 季朝阳 +1 位作者 张忠涛 师涌江 《河北建筑工程学院学报》 CAS 2024年第2期103-107,共5页
通过搭建土壤源热泵夏季制冷向土壤输送热量实验台,使土壤温度升高,当土壤热扩散半径为1m、2m时,取1m、2m处土样测单位质量土壤有机碳含量、总碳含量和无机碳含量,分别与对照组即同时间段且没有人为加热自然状态下的土壤样品的有机碳含... 通过搭建土壤源热泵夏季制冷向土壤输送热量实验台,使土壤温度升高,当土壤热扩散半径为1m、2m时,取1m、2m处土样测单位质量土壤有机碳含量、总碳含量和无机碳含量,分别与对照组即同时间段且没有人为加热自然状态下的土壤样品的有机碳含量、总碳含量和无机碳含量做对比,得出土壤作为空调冷源温度升高时土壤碳含量下降、且对土壤有机碳含量的影响比对土壤无机碳含量的影响显著的结论。 展开更多
关键词 土壤源热泵 土壤升温 土壤碳含量 双碳
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