地球上层自然温度状态对水热热泵系统效率的影响

IF 0.4 Q4 GEOSCIENCES, MULTIDISCIPLINARY
O. Zurian, A. A. Barilo
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The factors founded, which form the natural heat mode within the studied area, also the correlation established between temperature changes in the horizon and the operation of the heat pump unit, based on the experimental heat pump unit, established by the Institute of Renewable Energy of the National Academy the Sciences of Ukraine. The article presents an experimental hydrothermal heat pump system developed and constructed at the Institute of Renewable Energy of the National Academy of Sciences of Ukraine, which consists of a heat pump and two wells through which water circulation from the underground horizon to the heat pump. The study describes the characteristics of measuring equipment installed on a hydrothermal heat pump system and described developed an interactive scheduling system based on the software product ESM (Engineering Systems Manager) using the programming language FBD (Function Block Diagram | Continuous Function Chart). 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引用次数: 0

摘要

本文重点介绍了利用热泵技术利用上含水层低势热能进行地热替代采暖开发的现状。这种供热方式是可持续的,不需要消耗化石燃料,也不会污染环境。近年来,热泵技术已经变得普遍。许多供暖系统都是利用空气、开放水体或土壤中的低势能来实现的。虽然,现在,上层含水层的地下水热量是热泵更有效和可靠的能源来源。在这项研究中进行了测试。本研究的目的是评估地面上层的热状态对热泵机组运行效率的影响,利用近地表的地下水。基于乌克兰国家科学院可再生能源研究所建立的实验热泵机组,所建立的因素构成了研究区域内的自然热模式,也建立了地平线温度变化与热泵机组运行之间的相关性。本文介绍了乌克兰国家科学院可再生能源研究所研制和建造的实验水热热泵系统,该系统由一台热泵和两口井组成,水循环从地下地层到热泵。本研究描述了安装在水热热泵系统上的测量设备的特点,并描述了使用编程语言FBD (Function Block Diagram | Continuous Function Chart)开发了一个基于软件产品ESM (Engineering Systems Manager)的交互式调度系统。使用该软件产品创建了本工作过程中获得的视觉系统和档案数据系统。这项研究的好处是,实验装置使用波尔塔瓦-哈尔科夫含水层地下水的热能作为主要能源。生产层距为32 ~ 57 m。地下水位设定在40米左右。此外,还对观测井管道空间间的空气温度与含水层内地下水温度进行了监测。观测周期为6个月,测量频率为5-15秒。监测结果表明,尽管生产层深度明显超过乌克兰境内中性层的通常深度,但地层温度不稳定,其振幅为2℃。作者认为,年恒温地表深度的增加可能是由于研究区域的局部特征,即由于地形的影响,太阳辐射的吸收面增加,侧向热流入的存在,上部存在饱和水层。因此,基于对场地的地质和水文地质条件的分析,以及在安装过程中发生的技术过程,确定了形成上层地球自然温度的主要因素。因此,根据含水层中自然热载体温度的降低来计算装置的能源效率下降百分比。现已确定有必要进行进一步的研究,以评估为能源目的使用含水层对环境的影响,并确保含水层的最佳操作方式,使其尽可能接近其自然状态。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Impact of the natural temperature regime of the upper layers of Earth on efficiency of a hydrothermal heat pump system
This article focuses on current issues of alternative geothermal heating development, by using low-potential thermal energy of upper aquifers by heat pumping technology. This type of heat supply is sustainable, does not require fossil fuel consumption and does not pollute the environment. In recent years, heat pumping technologies have become common. A lot of heating systems are implemented, using low potential energy in the air, open bodies of water or soil. Although, now, the heat of groundwater in upper aquifers is a more efficient and reliable source of energy for heat pumps. It was tested in this study. The purpose of this study is to impact assessment of the heat regime of the ground upper layers on efficiency of operation of heat pumping units, using groundwater of near-surface horizons. The factors founded, which form the natural heat mode within the studied area, also the correlation established between temperature changes in the horizon and the operation of the heat pump unit, based on the experimental heat pump unit, established by the Institute of Renewable Energy of the National Academy the Sciences of Ukraine. The article presents an experimental hydrothermal heat pump system developed and constructed at the Institute of Renewable Energy of the National Academy of Sciences of Ukraine, which consists of a heat pump and two wells through which water circulation from the underground horizon to the heat pump. The study describes the characteristics of measuring equipment installed on a hydrothermal heat pump system and described developed an interactive scheduling system based on the software product ESM (Engineering Systems Manager) using the programming language FBD (Function Block Diagram | Continuous Function Chart). This software product was used to create the visual system and archival data system that were obtained in the course of this work. The benefits of this study are that the experimental installation uses the thermal energy of groundwater of the Poltava-Kharkov aquifer as the primary energy source. The interval of the productive horizon is 32-57 m. The groundwater level in the horizon is set at about 40 m. In addition, the air temperature between the pipe space of the observation well and the groundwater temperature in the aquifer are monitored. The duration of regime observations was six months, the frequency of measurements – 5-15 seconds. The monitoring results indicate that despite the fact that the productive horizon is at a depth that significantly exceeds the usual depth of the neutral layer for the territory of Ukraine, the for- mation temperature is not stable and its amplitude is 2 oC. According to the authors, the increase in the depth of the surface of constant annual temperatures may be due to local features of the studied area, namely: increasing the absorption surface of solar radiation due to terrain, the presence of lateral heat inflow, the presence of water-saturated layers in the upper part. Consequently, based on the analysis of geological and hydrogeological conditions of the site, as well as technological processes occurring in the installation, the main factors that form the natural temperature of the upper layers of the earth are identified. As a result, the percentage of energy efficiency drop of the installation is calculated depending on the decrease in the temperature of the natural heat carrier in the aquifer. It is established that it is necessary to conduct additional research to assess the environmental impact of the use of aquifers for energy purposes and to ensure the optimal mode of operation of aquifers, which would be as close as possible to their natural regime.
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来源期刊
Journal of Geology Geography and Geoecology
Journal of Geology Geography and Geoecology GEOSCIENCES, MULTIDISCIPLINARY-
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