地热能的合理利用

从能源和环境保护的角度介绍了我国地热资源和目前的应用状况，分析了当前我国地热资源应用过程中需要解决的问题及解决方案，探讨了提高地热资源利用率的技术措施。     

耦合热泵技术的地热能利用研究

本文介绍耦合热泵技术的地热能利用新思路,探讨地热与热泵技术耦合利用的形式。分析耦合热泵技术的地热能利用的优势,热泵技术与地热耦合利用中存在的问题。以及耦合热泵技术的地热能利用前景等,最后简要地介绍一种以地热能为驱动力的家用热泵的结构和工作原理。     

耦合热泵技术的地热能利用研究

介绍耦合热泵技术的地热能利用新思路,探讨地热与热泵技术耦合利用的形式,分析耦合热泵技术的地热能利用的优势,热泵技术与地热耦合利用中存在的问题,以及耦合热泵技术的地热能利用前景等,最后简要介绍了一种以地热能为驱动力的家用热泵的结构和工作原理。     

耦合热泵技术的地热能利用研究

本文介绍耦合热泵技术的地热能利用新思路 ,探讨地热与热泵技术耦合利用的形式 ,分析耦合热泵技术的地热能利用的优势 ,热泵技术与地热耦合利用中存在的问题 ,以及耦合热泵技术的地热能利用前景等 ,最后简要地介绍一种以地热能为驱动力的家用热泵的结构和工作原理。     

世界浅层地热能开发利用现状及我国的发展前景

在世界地热能直接利用中，应用地热热泵开发浅层地热能已在近些年内独占鳌头，其装机容量和利用能量均以每年超过20％的速度飞速增长，该技术适应了高效节能和环境保护的需要，而且经济可行、普遍适用。由此分析预测地热热泵也必将在我国具有远大的开发前景。     

国内外地热能开发利用综述

国内外地热能开发利用综述司士荣地球是一个大热库，蕴藏着巨大的热能，这种热能通过火山爆发、温泉、间歇喷泉、岩石的热传导等形式源源不断地带出地表，这就是地热能。据专家推算，每年从地球内部传到地球表面的热量，相当于３７０亿吨标准煤燃烧时发出的热量。有人做过...     

桩埋管地源热泵系统及其应用

桩埋管是地源热泵系统新的埋管方式.它与建筑结构相结合,充分地利用了建筑物面积,通过桩基与周围大地形成换热,从而减少了钻孔和埋管费用.文章阐述了桩埋管地源热泵地下换热器的设计和施工中应注意的问题,并结合温州市会所的实际工程作了说明.     

苏州市浅层地热能应用潜力评估与研究

介绍了浅层地热能应用潜力评估的方法,从影响浅层地热能开发的各项因素中确立浅层地热能适宜区分区的关键指标,通过GIS技术实现浅层地热能开发适宜性分区;并对苏州市进行了地埋管换热系统适宜性分区,计算了苏州各行政区浅层地热能单位温差储量和适宜区与较适宜区的总换热功率,为苏州市浅层地热能合理开发利用提供参考依据。。     

The potential contribution of geothermal energy to electricity supply in Saudi Arabia

With increase in demand for electricity at 7.5% per year, the major concern of Saudi Arabia is the amount of CO₂ being emitted. The country has the potential of generating 200×10⁶ kWh from hydrothermal sources and 120×10⁶ terawatt hour from Enhanced Geothermal System (EGS) sources. In addition to electricity generation and desalination, the country has substantial source for direct application such as space cooling and heating, a sector that consumes 80% of the electricity generated from fossil fuels. Geothermal energy can offset easily 17 million kWh of electricity that is being used for desalination. At least a part of 181,000 Gg of CO₂ emitted by conventional space cooling units can also be mitigated through ground-source heat pump technology immediately. Future development of EGS sources together with the wet geothermal systems will make the country stronger in terms of oil reserves saved and increase in exports.     

热泵技术与可再生能源的开发利用

目前,可再生能源和热泵技术受到广泛的重视.通过对可再生能源与热泵关系的分析以及对热泵低温热能采集方式的论述表明,可再生能源是热泵低温热源的主要来源,而热泵是可再生能源低温热利用最有效的方式,热泵技术的利用极大地拓展了可再生能源的利用范围.     

中深层地热Ｕ型井地埋管换热器的试验研究

地热能作为一种非碳基能源,具有储量丰富、清洁可再生等特点,开发利用地热能有助于碳达峰的实现。在中深层地源热泵领域,我国主要以单井同轴管为主,而相对高效的中深层地热U型井地埋管案例屈指可数。为了了解中深层地热U型井地埋管换热性能及井下换热参数变化,完成了新型的Ｕ型井地埋管换热器工程,并在此基础上进行了实验研究。首先,开展了地温测量,确定了研究区的地层温度,根据热储的物性条件选取了水平井段及对接位置;其次,分析空载循环试验工况下循环水的流量及井下温度的变化情况,研究了负载工况下供回水温度、流量、换热量、不同井段对换热的贡献率、井下温度的动态变化、U型井的恢复能力等因素。实验结果表明,中深层Ｕ型井地埋管换热器井底温度会随运行时间增长而降低,流量大且回水温度较低的情况下,换热器的换热量比较高,最高为1336.8kW;回水井对换热量的增加有限,每百米增加0.12℃,实际工程中可以考虑减小口径,降低建设费用。U型井地埋管换热器的地温恢复能力较强,停止运行24h左右井底温度与初始温度差为-13℃。研究结果有助于研究人员对中深层Ｕ型井地埋管换热器有更进一步的认识,从而推动中深层地热能的健康可持续发展。     

Modelling of heat supply for natural gas pressure reduction station using geothermal energy

In this paper, a series of works are conducted to study the effect of replacing natural gas burning heaters by a ground source heat pumps (GSHPs) to prevent natural gas freezing in the pressure regulating stations. In fact, the pressure drop causes a great temperature drop that can block out the pipeline and it is very crucial to control the phenomenon. Firstly, a conventional heater in the gas pressure drop station of Damavand city is selected as a case study. Then, a shell and tube heat exchanger coupled with GSHP is modelled to replace the conventional heater for eliminating the natural gas consumption in heaters. Finally, consumed energy, costs, and greenhouse gasses emissions are compared with the conventional system. Some main findings from the model show that: (1). Based on the GS2000 software results, the GSHP pipe trench is 601?m which are 7% less than the calculated data. (2). considering different inflation rates (15%-30%), the payback time would change between 4.5 and 7.5 years. (3). Due to the reduction in fossil fuel consumption, the CO₂ emission would be reduced by 47%.     

地热直供结合燃气吸收式热泵供暖系统的应用分析

介绍了地热直供结合燃气吸收式热泵系统的工作原理。结合工程实例,对燃油锅炉和地热直供结合燃气吸收式热泵两种供热热源的技术和经济性进行了比较和分析。各采暖期的实际运行数据表明,采用地热直供结合燃气吸收式热泵作为供热热源具有明显的节能效果和经济效益。     

我国中深层地热开发技术专利综述与分析

近年来地热能开发的传统抽灌模式因回灌问题受到诸多限制,一些地方甚至出台了一刀切的“封井”管理模式。中深层地热井下换热是一种取热不取水、取热效率较高,同时可突破传统地热利用中地热资源条件限制的利用模式。该技术的关键在于如何进行系统优化设计,在有效避免冷、热流体换热损失的同时获取最大取热功率,目前国内已有多项相关的授权专利。检索了国内中深层地热开发利用技术的相关专利,从申请地域、年份、申请人等方面进行了归纳分类和统计分析,并重点从技术原理的新颖性、实用性及技术经济可行性方面分析了有代表性的中深层地热开发技术专利,结果可为推进我国中深层地热开发利用技术提供理论参考,并为中深层井下换热系统的实际应用及其市场的健康发展提供帮助。     

Numerical simulation of snow melting using geothermal energy assisted by heat storage during seasons

Numerical simulation programs were developed for estimating temperature field and snow depth on a snow‐melting system using geothermal energy assisted by heat storage during seasons. The system utilized a group of piles underground as a heat exchanger and heat dissipation pipes near the pavement surface, realizing underground solar heat storage from the surface through the seasons. Verification experiments for this system were conducted not only in a relatively mild snowy region, Fukui, but also in a frigid region, Sapporo. Numerical simulation results demonstrated the existence of an optimum space of a group of piles, where snow melting power becomes maximal. The obtained simulation results showed good agreement with the experimental data of both regions, demonstrating the utility and validity of the programs. Also shown was that the proposed system can melt snow well in a frigid region, Sapporo, without the help of a heat pump. © 2013 Wiley Periodicals, Inc. Heat Trans Asian Res, 42(8): 724–744, 2013; Published online in Wiley Online Library ( wileyonlinelibrary.com/journal/htj ). DOI 10.1002/htj.20393     

Efficiency of closed loop geothermal heat pumps: A sensitivity analysis

Geothermal heat pumps are becoming more and more popular as the price of fossil fuels is increasing and a strong reduction of anthropogenic CO₂ emissions is needed. The energy performances of these plants are closely related to the thermal and hydrogeological properties of the soil, but a proper design and installation also plays a crucial role. A set of flow and heat transport simulations has been run to evaluate the impact of different parameters on the operation of a GSHP. It is demonstrated that the BHE length is the most influential factor, that the heat carrier fluid also plays a fundamental role, and that further improvements can be obtained by using pipe spacers and highly conductive grouts. On the other hand, if the physical properties of the soil are not surveyed properly, they represent a strong factor of uncertainty when modelling the operation of these plants. The thermal conductivity of the soil has a prevailing importance and should be determined with in-situ tests (TRT), rather than assigning values from literature. When groundwater flow is present, the advection should also be considered, due to its positive effect on the performances of BHEs; by contrast, as little is currently known about thermal dispersion, relying on this transport mechanism can lead to an excessively optimistic design.