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Статті в журналах з теми "GWVHP"

Автор: Grafiati

Опубліковано: 12 травня 2023

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1

Lei, Fei, and Ping Fang Hu. "Evaluation of the Performance of a Ground-Water Heat Pump System in Hot-Summer and Cold-Winter Region." Advanced Materials Research 805-806 (September 2013): 616–19. http://dx.doi.org/10.4028/www.scientific.net/amr.805-806.616.

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Анотація:

This study presented the energy performance evaluation of a ground-water heat pump (GWHP) system based on actual operational data. The GWHP system was installed for apartment buildings in Wuhan, China. During one year, various operating parameters of the GWHP system were monitored and the coefficient of performance (COP) of system was determined based on the measurement. The energy consumption of the GWHP system is more than twice the average value of split air conditioner on residential application, because of continuously operating of the GWHP system and frugally intermittence operating of s

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2

Yang, Jie, Yuezan Tao, Yulan Gao, Lijuan Wang, and Bo Kang. "Experimental study on the water–rock interaction mechanism in a groundwater heat pump reinjection process." Journal of Water and Climate Change 13, no. 3 (2022): 1516–33. http://dx.doi.org/10.2166/wcc.2022.393.

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Abstract Groundwater heat pump (GWHP) is a clean new energy technology. However, recharge clogging has always affected the operational efficiency of GWHP systems. The mechanism of the water–rock interaction inducing the chemical blockage of aquifers in particular is not clear enough. In this study, a sand column device was designed to simulate the recharge of GWHP, and the geothermal water and aquifer sand of the actual GWHP project were collected. Moreover, we have characterized the sand using SEM-EDS, XRD and FT-IR; meanwhile, the evolution of the hydrochemical components, the relationship b

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3

Wang, Zhi Wei, Yi Peng, Zhong He Zhang, Wei Cao, and Peng Li. "Study on Non Energy Saving Status Detection of Groundwater Heat Pump System Using Artificial Neural Network Method." Advanced Materials Research 443-444 (January 2012): 325–32. http://dx.doi.org/10.4028/www.scientific.net/amr.443-444.325.

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Presents two types of characteristic data: basic characteristic parameters and index characteristic parameters for non energy saving status detection (NESSD) of groundwater heat pump (GWHP) system, establishes the relationship database between characteristic data and fault factors of NESSD. For three kinds of improving back propagation (BP) algorithms: Variable Learning Rate (VLR) BP algorithm, Scaled Conjugate Gradient (SCG) BP algorithm, and Levenberg-Marquardt (LM) BP algorithm, these various algorithms’ comparative study had been conducted on the GWHP system’s NESSD. The optimal algorithm

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4

Gao, Qing, Xue Zhi Zhou, Xiao Wen Zhao, Chun Qiang Ma, and Yu Ying Yan. "Development and Challenges of Groundwater Heat Pump in China." Applied Mechanics and Materials 193-194 (August 2012): 115–20. http://dx.doi.org/10.4028/www.scientific.net/amm.193-194.115.

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Анотація:

A groundwater heat pump (GWHP) is one type of ground source heat pump (GSHP) and is a major form of earth energy utilization, which can realize the direct use of groundwater energy or the reuse of stored underground energy. The energy conservation effect of GWHP plays an important role in the national energy strategy, but the groundwater environment has been affected and even damaged to some extent because of over-exploitation and unreasonable utilization. This paper reviews the development and challenges of GWHP in China and surveys the situation of groundwater utilization, which shows that l

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5

Kim and Lee. "Effects of a Groundwater Heat Pump on Thermophilic Bacteria Activity." Water 11, no. 10 (2019): 2084. http://dx.doi.org/10.3390/w11102084.

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Groundwater samples were collected from the tubular wells of a groundwater heat pump (GWHP), and the psychrophilic, mesophilic, and thermophilic bacteria inhabiting the collected groundwater were cultured and isolated. Using the isolated bacteria, we analyzed temperature-dependent changes in autochthonous bacteria based on the operation of the GWHP. Microbial culture identified eight species of bacteria: five species of thermophilic bacteria (Anoxybacillus tepidamans, Bacillus oceanisediminis, Deinococcus geothermalis, Effusibacillus pohliae, and Vulcaniibacterium thermophilum), one species of

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6

Yang, Jie, Wei Wang, Lin Hu, Yulan Gao, and Yuezan Tao. "Influence of different pumping and recharging schemes on regional groundwater drawdown in groundwater heat pump project: A case in Anhui Fuyang People’s Hospital." Thermal Science, no. 00 (2020): 316. http://dx.doi.org/10.2298/tsci200614316y.

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In the process of exploiting geothermal energy by groundwater heat pump (GWHP), the dynamic equilibrium of regional groundwater drawdown is the basis for sustained operation of GWHP. In this paper, taking the GWHP project of Fuyang People's Hospital in Anhui, China as an example, a mathematical model is established and numerical simulation is carried out based on the hydrogeological conceptual model by using Modflow software. In addition, considering the pattern of same direction recharge, the intersect recharge and the ratio of 90% and 100% reinjection respectively, the area change of the dra

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7

Dahal, Niroj, Radha Krishna Shrestha, Sajjan Sherchan, Sanam Milapati, Shree Raj Shakya, and Ajay Kumar Jha. "Performance Analysis of Booster based Gravitational Water Vortex Power Plant." Journal of the Institute of Engineering 15, no. 3 (2020): 90–96. http://dx.doi.org/10.3126/jie.v15i3.32026.

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Gravitational Water Vortex Power Plant (GWVPP) is a power generation system that suits for ultralow head streams of water with low flow rate. Due to the simple design, compact structure, and the possibility of local fabrication, it can benefit rural areas for off-grid supply. The purpose of this research is to study the potential of booster based GWVPP. Previous researches concluded the best position of turbine in GWVPP is actually not the maximum head position which eventually does not extract all possible head. This research explores the possibility of adding an extra runner (booster runner)

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8

Zhang, Xiaoming, Qiang Wang, Qiujin Sun, and Mingyu Shao. "Experimental Study on Automatic Switching of Solar Coupled Groundwater Source Heat Pump System." Journal of Physics: Conference Series 2095, no. 1 (2021): 012077. http://dx.doi.org/10.1088/1742-6596/2095/1/012077.

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Abstract There have been few practical applications of solar coupled groundwater source heat pump (GWHP) systems in large public buildings, and data on this technology are scarce. A solar coupled GWHP system was investigated in this study. The system uses an underground water source heat pump system for heating in winter, cooling in summer, and providing part of the domestic hot water, and it also uses a solar energy system to prepare domestic hot water. These two types of energy are complementary. The system was tested throughout the cooling season. This experiment ran from May 10, 2021, to S

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9

Bajracharya, Tri Ratna, Shree Raj Shakya, Ashesh Babu Timilsina, et al. "Effects of Geometrical Parameters in Gravitational Water Vortex Turbines with Conical Basin." Journal of Renewable Energy 2020 (December 2, 2020): 1–16. http://dx.doi.org/10.1155/2020/5373784.

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Gravitational Water Vortex Power Plant (GWVPP) is an appropriate means to convert kinetic energy of water to rotational mechanical energy at the very low head site. This study aims to establish a basic reference for the design of the runner for the Gravitational Water Vortex Turbine (GWVT) with a conical basin. Seven different geometrical parameters have been identified for runner design, and the effect of these parameters on the system efficiency has been studied numerically and experimentally. The effect of these parameters has been studied over the range of speed with torque. The results fr

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10

Peng, Bo, Na Zhu, Ping Fang Hu, Li Peng, and Fei Lei. "Study on Performance of Ground Source Heat Pump Systems Based on Site Tests." Advanced Materials Research 1008-1009 (August 2014): 226–30. http://dx.doi.org/10.4028/www.scientific.net/amr.1008-1009.226.

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This study analyze the actual operation performance and energy efficiency of thirty-nine ground source heat pump (GSHP) systems based on site tests in Wuhan, China. These systems include ground couple heat pump (GCHP) systems, ground water heat pump (GWHP) systems and hybrid ground source heat pump (HGSHP) systems. The results show that energy-saving rates reach 30% for most of the systems using method recommended by Assessment Guideline. The coefficient of performance (COP) of the systems varies as follow: 2.6-4.85 for GCHP systems; 2.58-3.74 for GWHP systems; 2.66-5.67 for combined heat pump

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11

Joshi, Shubhash, and Ajay Kumar Jha. "Computational and Experimental Study of the Effect of Solidity and Aspect Ratio of a Helical Turbine for Energy Generation in a Model Gravitational Water Vortex Power Plant." Journal of Advanced College of Engineering and Management 6 (July 10, 2021): 213–19. http://dx.doi.org/10.3126/jacem.v6i0.38360.

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Gravitational Water Vortex power plant is a relatively new plant used to generate hydropower from low head rivers and canals. There has been an increase in research in the field of runner design and canal design for GWVPPs throughout the world. As no definite equations are formulated in case of runners used in a GWVPP, they are currently produced by hit and trial method. This research focuses on studying about the use of a pure reaction turbine, Gorlov turbine, to generate power from a GWVPP. ANSYS Fluent was used to perform computational study while the experimental study was done using helic

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12

Edirisinghe, D. S., H. S. Yang, B. H. Kim, C. G. Kim, S. D. G. S. P. Gunawardane, and Y. H. Lee. "Numerical Optimization of Gravitational Water Vortex Turbine using Computational Flow Analysis." IOP Conference Series: Earth and Environmental Science 1037, no. 1 (2022): 012004. http://dx.doi.org/10.1088/1755-1315/1037/1/012004.

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Abstract Gravitational Water Vortex Power (GWVP) plants are considered one of the most favourable micro-hydro extraction methods suitable for rural communities in mountain areas. Many researchers have focused on enhancing the performance of GWVP plants since it is less efficient than other commercial hydro turbines. This study mainly focuses on optimization of vortex turbine situated in conical vortex basin using the computational fluid dynamic (CFD) analysis. The basic turbine blade design was modified with inclination, height, vertical twist, and horizontal curvature. CFD results were analys

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13

Xiang, Jing Yan, Jun Zhao, Xi Kui Wang, and Bao Zhu Zhao. "Dynamic Exergetic Cost Analysis of a Space Heating System." Advanced Materials Research 354-355 (October 2011): 722–25. http://dx.doi.org/10.4028/www.scientific.net/amr.354-355.722.

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The design of heating systems with groundwater source heat pumps (GWHP) is very important for reducing their power consumption. For better design, reasonable analysis of the systems is necessary. In this paper, a dynamic exergy and exergetic cost analysis of a heating system with GWHP is performed in a whole heating season by the use of structural theory of thermoeconomics and the software of TRNSYS. The relative exergy destruction of every component and the exergetic cost of the final product of the system are obtained. The results show that the heat pump has the largest relative exergy destr

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14

Li, Bing Hua, Xiao Juan Cao, Li Cai Liu, Fan Dong Zheng, and Ni Zhang. "Effects of Groundwater Heat Pump Systems on the Temperature and Quality of Groundwater in Recharged Aquifer." Applied Mechanics and Materials 670-671 (October 2014): 1016–22. http://dx.doi.org/10.4028/www.scientific.net/amm.670-671.1016.

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Groundwater heat pump (GWHP) systems in three different hydrogeological fields, Beijing were selected, and their effects on temperature of groundwater in recharged aquifer were researched for three years. Results showed that the degree of thermal breakthrough was controlled by the distance between pumping wells and injection wells, and the temperature of groundwater with high flow rate can recover to normal faster than those with low flow rate. When distance between pumping wells and injection wells were shorter than 30m, thermal breakthrough may happen and the variation range of groundwater t

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15

Li, Bing Hua, Xiao Juan Cao, Li Cai Liu, Fan Dong Zheng, and Ni Zhang. "Effects of Groundwater Heat Pump Systems on the Temperature and Quality of Groundwater in Recharged Aquifer." Applied Mechanics and Materials 672-674 (October 2014): 379–85. http://dx.doi.org/10.4028/www.scientific.net/amm.672-674.379.

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Анотація:

Groundwater heat pump (GWHP) systems in three different hydrogeological fields, Beijing were selected, and their effects on temperature of groundwater in recharged aquifer were researched for three years. Results showed that the degree of thermal breakthrough was controlled by the distance between pumping wells and injection wells, and the temperature of groundwater with high flow rate can recover to normal faster than those with low flow rate. When distance between pumping wells and injection wells were shorter than 30m, thermal breakthrough may happen and the variation range of groundwater t

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16

Indarto, Bachtera, Mochammad Ilman Nafi’, Muhammad Hasan Basri, Hilman Saraviyan Iskawanto, and Alfi Tranggono Agus Salim. "Rancang Bangun Gravitation Water Vortex Power Plant (GWVPP) Berbasis Basin Silinder." JEECAE (Journal of Electrical, Electronics, Control, and Automotive Engineering) 5, no. 1 (2020): 27–34. http://dx.doi.org/10.32486/jeecae.v5i1.498.

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17

Basri, Muhammad Hasan, Bayu Okta Pratama, Muhammad Faisol, Ali Zainal Abidin, and Moh Arif Billah. "Redesigh Gravitation Water Vortex Power Plant (GWVPP) Study Kasus Desa Duren." TRILOGI: Jurnal Ilmu Teknologi, Kesehatan, dan Humaniora 2, no. 1 (2021): 1–5. http://dx.doi.org/10.33650/trilogi.v2i1.1905.

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Residents in remote areas have not been able to enjoy electricity, including Desa Duren, Gading District, located in the mountainous area south of Probolinggo Regency, where the village still does not receive electricity supply from PLN. Hydropower is a renewable energy that can be used as a substitute for generators, where this potential can be used to become a Gravitation Water Vortex Power Plant (GWVPP) already in the village, but it needs a touch of redesign. The results of the research on the reduction of gravitation water vortex power pland in Duren Village can be obtained that the elect

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18

Zhou, Xuezhi, Qing Gao, Xiangliang Chen, Yuying Yan, and Jeffrey D. Spitler. "Developmental status and challenges of GWHP and ATES in China." Renewable and Sustainable Energy Reviews 42 (February 2015): 973–85. http://dx.doi.org/10.1016/j.rser.2014.10.079.

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19

Strelec, Stjepan, Filip Dodigovic, Kristijan Grabar, and Barica Marincic-Kovacev. "The Influence of Aquifer Parameters on the Design of Extraction and Recharge Wells for Heat Pump Systems." Environmental Sciences Proceedings 5, no. 1 (2020): 24. http://dx.doi.org/10.3390/iecg2020-08550.

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Анотація:

Groundwater can be considered a non-polluting, renewable energy source. It can be used as a fluid in industrial, commercial, and residential building heating and air-conditioning systems. Usually, the water table is deep enough, so atmospheric conditions have a negligible influence on water temperature. Consequently, annual temperature variations are minor, and groundwater can therefore also be considered a reliable energy source. This paper presents some aspects of groundwater heat pump (GWHP) well design and addresses problems that can occur during their exploitation. The heat pump system co

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20

Choi, Hanna, Jaeyeon Kim, Byoung Ohan Shim, and Dong-hun Kim. "Characterization of Aquifer Hydrochemistry from the Operation of a Shallow Geothermal System." Water 12, no. 5 (2020): 1377. http://dx.doi.org/10.3390/w12051377.

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The use of shallow geothermal energy systems utilizing groundwater temperature for the air-conditioning of buildings is increasing worldwide. The impact of these systems on groundwater quality has become crucial for environmental regulations and system design. For the long-term operation of geothermal systems, it is important to evaluate their influence on the geochemical properties of groundwater, including precipitation and dissolution of secondary minerals. This research was conducted in a real-scale geothermal system, consisting of a groundwater heat pump (GWHP). Hydrochemical data were ob

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21

Velásquez García, L., A. Rubio-Clemente, and E. Chica. "Runner optimal position in a gravitational water vortex hydraulic turbine with spiral inlet channel and a conical basin." Renewable Energy and Power Quality Journal 20 (September 2022): 143–47. http://dx.doi.org/10.24084/repqj20.248.

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A gravitational water vortex hydraulic turbine (GWVHT) is a low head hydropower technology with a vertical runner for extracting energy from the water vortex. To determine the optimal position (h) of the runner for the hydropower plant efficiency to be increased, a runner in three different positions was compared using computational fluid dynamics (CFD). The position of the runner was a function of the basin height (H). The maximum efficiency (44.15%) was established when the runner was located at 60% of H. The angular velocity associated with the maximum efficiency was 14 rad/s.

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22

Licharz, Hannah, Peter Rösmann, Manuel S. Krommweh, Ehab Mostafa, and Wolfgang Büscher. "Energy Efficiency of a Heat Pump System: Case Study in Two Pig Houses." Energies 13, no. 3 (2020): 662. http://dx.doi.org/10.3390/en13030662.

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This study describes a 70-day investigation of three identical groundwater heat pumps (GWHP) for heating two pig houses located on the same farm in West Germany. Two of the three GWHPs were installed in a piglet-rearing barn, the third in a farrowing barn. All three heat pumps were fed from the same extraction well. The aim of this study was firstly the empirical performance measurement of the GWHP systems and secondly the energetic evaluation of the systems on barn level by calculating the coefficient of performance (COP). Three different assessment limits were considered in order to better i

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23

Cappellari, Davide, Leonardo Piccinini, Alessandro Pontin, and Paolo Fabbri. "Sustainability of an Open-Loop GWHP System in an Italian Alpine Valley." Sustainability 15, no. 1 (2022): 270. http://dx.doi.org/10.3390/su15010270.

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Shallow geothermal systems (SGSs) for building climatization represent an advantageous alternative to traditional air-conditioning systems, resulting in economic and environmental benefits. Installation of these systems requires knowledge of site-specific geological and hydrogeological conditions, which in feasibility studies are often evaluated only at the single plant scale, lacking a comprehensive view and risking not to guarantee the system sustainability over time. In this paper a methodology for the sustainable design of SGSs is presented. The methodology is developed from an example on

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24

Zhou, Yan-zhang, and Zhi-fang Zhou. "Simulation of Thermal Transport in Aquifer: A GWHP System in Chengdu, China." Journal of Hydrodynamics 21, no. 5 (2009): 647–57. http://dx.doi.org/10.1016/s1001-6058(08)60196-1.

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25

Chen, Xiao, Jie Han, and Jing Zeng. "Performance and Benefits Evaluation of Two Water-Source Heat Pump Systems for District Heating." Applied Mechanics and Materials 204-208 (October 2012): 4225–28. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.4225.

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The heating source of a district heating (DH) system in Beijing was reformed from coal boilers to a groundwater heat pump (GWHP) system and a sewage source heat pump (SSHP) system. This study aims to evaluate the actual performance and benefits of two water-source heat pump systems. We found total energy savings and primary energy saving rate due to the retrofit to be 950 tons of standard coal equivalent (TCE) every year and 34.6%, respectively. Field test results indicated the necessity of system performance improvement. Appropriate approaches to improve the system performance were discussed.

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26

Cui, Xianze, Yong Fan, Hongxing Wang, and Shibing Huang. "Ground environment characteristics during the operation of GWHP considering the particle deposition effect." Energy and Buildings 206 (January 2020): 109593. http://dx.doi.org/10.1016/j.enbuild.2019.109593.

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27

SÖZEN, MUSTAFA, NURI YIGIT, and ERCÜMENT ÇOLAK. "A STUDY ON KARYOTYPIC EVOLUTION OF THE GENUS SPALAXGÜLDENSTAEDT, 1770 (MAMMALIA: RODENTIA) IN TURKEY." Israel Journal of Zoology 46, no. 3 (2000): 239–42. http://dx.doi.org/10.1560/b12r-nlfr-gwvh-0b83.

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28

SöZEN, MUSTAFA, NURI YIGIT, and ERCüMENT çOLAK. "A STUDY ON KARYOTYPIC EVOLUTION OF THE GENUS SPALAXGüLDENSTAEDT, 1770 (MAMMALIA: RODENTIA) IN TURKEY." Israel Journal of Zoology 46, no. 3 (2000): 239–42. http://dx.doi.org/10.1092/b12r-nlfr-gwvh-0b83.

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29

Deng, Xiao Qiong. "Design and Operation Prediction of Groundwater Heat Pump." Advanced Materials Research 608-609 (December 2012): 983–86. http://dx.doi.org/10.4028/www.scientific.net/amr.608-609.983.

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Анотація:

This article based on a large-scale water source heat pump engineering in a city of China, according to the experiment and survey of pumping site as well as hydrogeological parameters combined with the building load requirements, the design scheme of cluster wells pumping and injection was given. A numerical simulation was also done in order to analyze and forecast the temperature changes in aquifer and thermal breakthrough, well group interference problems for the next 3 years. Moreover an experience equation about change of average temperature of water source heat pump wells was got which wi

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30

Luo, Jin, Kanghui Pei, and Peijia Li. "Analysis of the thermal performance reduction of a groundwater source heat pump (GWHP) system." Engineering Failure Analysis 132 (February 2022): 105922. http://dx.doi.org/10.1016/j.engfailanal.2021.105922.

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31

Wu, Yan Peng, and Hai Shan Xia. "Comparison and Selection of HVAC Schemes for Weihai Baidu City." Advanced Materials Research 374-377 (October 2011): 681–84. http://dx.doi.org/10.4028/www.scientific.net/amr.374-377.681.

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Анотація:

The second phase of Weihai Baidu City project plans to become a three-star certificated program which is labled by China’s enviromental building evaluation. Heating and ventilated air conditioning program is one of the most important aspects in evaluation of energy saving. Feasibility study on GSHP, GWHP, air-source heat pump, seawater source heat pump were carried out, it’s confirmed that the most energy-saving and reliable way is that using municipal pipe networks for heating in winter and using split air conditioning or multi-connected air-conditioning system in summer. Summer air-condition

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32

Park, Byeong-Hak, Gwang-Ok Bae, and Kang-Kun Lee. "Importance of thermal dispersivity in designing groundwater heat pump (GWHP) system: Field and numerical study." Renewable Energy 83 (November 2015): 270–79. http://dx.doi.org/10.1016/j.renene.2015.04.036.

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33

Li, Hua, Li Yang, and Hui Qin Dong. "Groundwater Source Heat Pump Technology Use for Heating and Air-Conditioning of a Commercial Building." Advanced Materials Research 608-609 (December 2012): 994–97. http://dx.doi.org/10.4028/www.scientific.net/amr.608-609.994.

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Анотація:

The groundwater source heat pump (GWHP) system utilizes groundwater as alternative renewable and clean energy source for space heating and cooling, withdraws water from a production well, passes it through a heat exchanger and discharges the water into an injection well. Hebei Province of China is rich of geothermal resources; there are suitable hydrogeological conditions in most areas. Take an office building in Hebei Province for example; a detail loads analysis of the groundwater source heat pump system was conducted. At the same time, an analysis of environmental energy benefits was also c

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34

Pandey, Shankar Nath, Raj Kumar Chaulagain, and Bimal Pandey. "Simulation of Propeller Runner for Cylindrical Basin of Gravitational Water Vortex Power Plant." Advances in Engineering and Technology: An International Journal 2, no. 01 (2022): 87–101. http://dx.doi.org/10.3126/aet.v2i01.50461.

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The gravitational water vortex power plant is an emerging technology of power generation from water vortex in a small amount. It can generate electricity in a low head of range (0.7-2m). This system is very simple and requires less keep-up. This research aims to develop the propeller type runner which gives optimum efficiency and cylindrical basin suitable for this propeller runner in GWVPP. The research has been conducted by developing a new propeller runner and cylindrical basin considering the top surface open as the atmosphere. Blade angle, discharge hole diameter of the basin, the positio

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35

Luo, Jin, Peijia Li, Zezhou Yan, and Yungang Wu. "An integrated 3D method to assess the application potential of GWHP systems in fluvial deposit areas." Renewable Energy 187 (March 2022): 631–44. http://dx.doi.org/10.1016/j.renene.2022.01.103.

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36

Park, Byeong-Hak, Won-Tak Joun, Bo-Hyun Lee, and Kang-Kun Lee. "A Study on Significant Parameters for Efficient Design of Open-loop Groundwater Heat Pump (GWHP) Systems." Journal of Soil and Groundwater Environment 20, no. 4 (2015): 41–50. http://dx.doi.org/10.7857/jsge.2015.20.4.041.

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Fatimah, Iim, Haswin Dian Fathoni, and Bachtera Indarto. "Performance Analysis of Cone Basin-Based Gravitational Water Vortex Power Plant (GWVPP) by Variations in the Number of Blades." Jurnal Fisika dan Aplikasinya 18, no. 3 (2022): 69. http://dx.doi.org/10.12962/j24604682.v18i3.14496.

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38

Lo Russo, Stefano, Glenda Taddia, and Vittorio Verda. "Development of the thermally affected zone (TAZ) around a groundwater heat pump (GWHP) system: A sensitivity analysis." Geothermics 43 (July 2012): 66–74. http://dx.doi.org/10.1016/j.geothermics.2012.02.001.

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39

Jiang, Yan, Xiaoyang Wang, Ming Li, and Qing Gao. "Investigations on heat flow characteristics of the aquifer for groundwater heat pump (GWHP) composed of different well types." International Journal of Green Energy 16, no. 12 (2019): 857–66. http://dx.doi.org/10.1080/15435075.2019.1641106.

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40

Park, Byeong-Hak, Bo-Hyun Lee, and Kang-Kun Lee. "Experimental investigation of the thermal dispersion coefficient under forced groundwater flow for designing an optimal groundwater heat pump (GWHP) system." Journal of Hydrology 562 (July 2018): 385–96. http://dx.doi.org/10.1016/j.jhydrol.2018.05.023.

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41

Milnes, Ellen, and Pierre Perrochet. "Assessing the impact of thermal feedback and recycling in open-loop groundwater heat pump (GWHP) systems: a complementary design tool." Hydrogeology Journal 21, no. 2 (2012): 505–14. http://dx.doi.org/10.1007/s10040-012-0902-y.

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42

Liu, Zhijian, Yulong Zhang, Wei Xu, Xinyan Yang, Yuanwei Liu, and Guangya Jin. "Suitability and feasibility study on the application of groundwater source heat pump (GWSHP) system in residential buildings for different climate zones in China." Energy Reports 6 (November 2020): 2587–603. http://dx.doi.org/10.1016/j.egyr.2020.09.015.

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43

Aizaz, Ahmad, and Nauman Hafeez. "Resolving National Energy Crisis through Energy Efficient Appliances: Use of Ground Water Heat Pump for Air Conditioning Systems." Advanced Materials Research 983 (June 2014): 261–64. http://dx.doi.org/10.4028/www.scientific.net/amr.983.261.

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Анотація:

Energy crisis are deepening with every year passing by in a country like Pakistan. One of the major contributors of energy consumption in the domestic as well as in some commercial sector is the environment air conditioning (during summers) and heating systems (during winters). One possible solution to this national energy crisis is available in the form of tapping the available renewable natural resources of energy, specifically the Ground Water Heat Pumps (GWHP). Despite its wider applications in the advanced countries, the confidence in this technology is much feeble in less advanced countr

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44

Gizzi, Martina, Glenda Taddia, Elena Cerino Abdin, and Stefano Lo Russo. "Thermally Affected Zone (TAZ) Assessment in Open-Loop Low-Enthalpy Groundwater Heat Pump Systems (GWHPs): Potential of Analytical Solutions." Geofluids 2020 (April 27, 2020): 1–13. http://dx.doi.org/10.1155/2020/2640917.

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Thermal perturbation produced in the subsurface by open-loop groundwater heat pump systems (GWHPs) must be predicted and constantly controlled, especially in the shallow aquifers of more densely urbanized areas, in order to guarantee plants’ long-term sustainable use and to avoid adverse effects on adjacent geothermal systems. Transient conditions in the flow dynamic can be successfully modelled by means of numerical modelling tools. However, for small plants in suitable hydrogeological systems, an alternative tool for predicting the thermally affected zone (TAZ) around the injection well can

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45

Gjengedal, Sondre, Lars A. Stenvik, Pål-Tore S. Storli, Randi K. Ramstad, Bernt O. Hilmo, and Bjørn S. Frengstad. "Design of Groundwater Heat Pump Systems. Principles, Tools, and Strategies for Controlling Gas and Precipitation Problems." Energies 12, no. 19 (2019): 3657. http://dx.doi.org/10.3390/en12193657.

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The utilization of groundwater heat pump systems is increasing in Norway, which are currently widely employed for heating and cooling applications in the town center of Melhus. The investigations of the Melhus installations are detecting gas exsolution as a possible trigger for precipitation reaction that causes incrustation of iron and manganese compounds in the systems. This paper discusses risks associated with gas exsolution and considers gas exsolution triggers in a typical Norwegian groundwater heat pump (GWHP) system configuration. The concept of the solubility grade line (SGL) is devel

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46

Lo Russo, Stefano, Loretta Gnavi, Emanuele Roccia, Glenda Taddia, and Vittorio Verda. "Groundwater Heat Pump (GWHP) system modeling and Thermal Affected Zone (TAZ) prediction reliability: Influence of temporal variations in flow discharge and injection temperature." Geothermics 51 (July 2014): 103–12. http://dx.doi.org/10.1016/j.geothermics.2013.10.008.

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47

Hasan Basri, Muhammad, and Ainun Nasuki. "Water Discharge Management Based on Open and Closed Cylinders in the Gravitation Water Vortex Power Plant." JEEE-U (Journal of Electrical and Electronic Engineering-UMSIDA) 5, no. 1 (2021): 22–36. http://dx.doi.org/10.21070/jeeeu.v5i1.1008.

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Анотація:

A Gravitation Water Vortex Power Plant (GWVPP) tool has been made to determine how much water flow is needed to generate electricity. This research was conducted by changing the flow rate and water pressure to determine the effect on the performance of a vortex power plant, and in previous studies, no one has made changes to the discharge and water pressure. The type of basin position used in this study is an open basin position and a closed basin position. Based on the advantages and disadvantages of each type of blade used, a study was carried out using the type of turbine blade model L by c

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Strelec, Stjepan, Kristijan Grabar, Jasmin Jug, and Nikola Kranjčić. "Influence of Recharging Wells, Sanitary Collectors and Rain Drainage on Increase Temperature in Pumping Wells on the Groundwater Heat Pump System." Sensors 21, no. 21 (2021): 7175. http://dx.doi.org/10.3390/s21217175.

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The utilization of groundwater is becoming increasingly popular for heating and cooling buildings, as well as to regulate the temperature needs of industrial processes. Groundwater has excellent energy potential from various factors, of which environmental acceptability stands out, as groundwater is considered a source of renewable energy. Due to the water table depth below the surface, atmospheric conditions have a negligible effect on the temperature of groundwater, resulting only in minor annual temperature variations, thus also making groundwater a source of reliable renewable energy. This

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Gjengedal, Sondre, Lars A. Stenvik, Randi K. Ramstad, Jan I. Ulfsnes, Bernt O. Hilmo, and Bjørn S. Frengstad. "Online remote-controlled and cost-effective fouling and clogging surveillance of a groundwater heat pump system." Bulletin of Engineering Geology and the Environment, September 10, 2020. http://dx.doi.org/10.1007/s10064-020-01963-z.

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Abstract Fouling and clogging of groundwater wells and heat exchangers are among the major operational challenges for groundwater heat pump (GWHP) and aquifer thermal energy storage (ATES) systems. This article presents the application of a step-test surveillance procedure developed for early detection of clogging in distinct parts of the GWHP system, tested at Lena Terrace in Melhus Norway. Three versions of the test procedure are presented and demonstrate that the test can be performed with a minimum of four steps, each of 15-min duration, while the GWHP system is actively producing heat. Th

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Lin, Fei, Honglei Ren, Ting Wei, Yuezan Tao, Yucheng Li, and Jie Yang. "Geothermal dynamic constraints of groundwater source heat pump system in shallow aquifers." Frontiers in Energy Research 10 (January 6, 2023). http://dx.doi.org/10.3389/fenrg.2022.928125.

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Анотація:

Due to the temperature of shallow aquifers being affected by atmospheric temperature, groundwater source heat pumps (GWSHPs) become unstable and the operation efficiency of GWSHP is constrained. In the study, the coupling numerical simulation model of the groundwater flow field and temperature field is established based on the continuous monitoring results in an actual experimental site, and the water and thermal migration of shallow aquifer is simulated under the influence of the atmospheric environment. The influence of the dynamic change in ground temperature is analyzed on a GWSHP. The res

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