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Academic literature on the topic 'GWVHP'

Author: Grafiati
Published: 12 May 2023

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Journal articles on the topic "GWVHP"

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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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 split air conditioner. The GWHP system is more economical than other central system. The energy savings rate of the GWHP system was 41.5% for the heating season comparing with boiler and 42% for the cooling season comparing with air source heat pump.
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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 (January 24, 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 between TDS and mineral dissolution and the concentration variation trend of [Na+ + K+] and [Mg2+ + Ca2+] were analysed. The results showed that the maximum reduction of the albite content in the column, except for P4 and P6, was 13.97%, while the calcite content in the P3–P4 and P7–P10 segments increased by 1.2%. The anhydrite content was reduced in the whole interval. Therefore, the precipitation and dissolution of minerals might occur in the process of recharge, which was more significant in the front of the column. In addition, the water–rock reaction induced by GWHP recharge is a process that also involves the cation exchange adsorption of Na+ with Mg2+ and Ca2+.
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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 among them is determined and the GWHP system’s NESSD as cases studies can be carried out based on the most suitable BP algorithm.
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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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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 lack of cognitive ability, scientific constraints and reasonable utilization may bring catastrophic damage to the groundwater. A coming work should aim to more researching basic problems, such as thermal interaction, energy transport in the well field, groundwater contamination, etc. In fact, the characteristics of unsteady and transient heat transfer in the complex underground environment, and their control strategies have been being also the most pressing problem. Their explorations and studies will strengthen the theoretical and practical understanding, and guide an orderly, healthy and sustainable development of GWHP.
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Kim and Lee. "Effects of a Groundwater Heat Pump on Thermophilic Bacteria Activity." Water 11, no. 10 (October 6, 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 mesophilic bacteria (Lysobacter mobilis), and two species of psychrophilic bacteria (Paenibacillus elgii and Paenibacillus lautus). The results indicated A. tepidamans as the most dominant thermophilic bacterium in the study area. Notably, the Anoxybacillus genus was previous reported as a microorganism capable of creating deposits that clog above-ground wells and filters at geothermal power plants. Additionally, we found that on-site operation of the GWHP had a greater influence on the activity of thermophilic bacteria than on psychrophilic bacteria among autochthonous bacteria. These findings suggested that study of cultures of thermophilic bacteria might contribute to understanding the bio-clogging phenomena mediated by A. tepidamans in regard to GWHP-related thermal efficiency.
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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 drawdown funnel caused by the GWHP project and the recovery of the water level after the system stopped operation are analyzed. The results show that the funnel area of the pumping well under the 90% recharge ratio is greater than that of the 100% recharge, while the operation result of recharge well is opposite in the most adverse situation of the system with a production volume of 1440m3/d and continuous operation for 4 months. Furthermore, with the same reinjection ratio, the funnel area of the same direction recharge mode is larger than that of the intersect recharge mode in both pumping wells and recharge wells, and increases with the decrease of drawdown. Moreover, with the increase of recharge amount, while the water level of recharge well rises, there is a certain supplement and balance to the water quantity of the pumping well.
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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 (October 13, 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) below the main runner in the existing set up for additional power generation. The performance of the booster runner, modelled in CATIA V5R21 was studied computationally using ANSYS 18.1 FLUENT for various boosters with varieties of number of blades, blade inclination angle, height of booster, rotational speed and the blade profile so as to obtain the most suitable design of the booster runner, which was then verified experimentally in a model set up using four different booster runners. The research showed an increase of 3.84W in the miniaturized model which corresponds to the increase in efficiency of 20.4% from a total of 63.55% by main runner alone. This implies that the power generation can be increased by the addition of the booster runner in the existing set up.
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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 (November 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 September 10, 2021. The results show that the system can guarantee the indoor design temperature and the supply of domestic hot water. The solar water heating system operated for 1233 min in the summer; hot water (2334 m3) was prepared. During the summer, the average energy efficiency ratio of the GWHP unit was approximately 4.88. The energy efficiency ratio of the entire system was approximately 3.34. Such projects can play a key role in demonstrating this type of system.
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Bajracharya, Tri Ratna, Shree Raj Shakya, Ashesh Babu Timilsina, Jhalak Dhakal, Subash Neupane, Ankit Gautam, and Anil Sapkota. "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 from performance tests of these runners suggest that runner height is the most significant parameter to be considered in the design of a turbine runner for GWVPP with a conical basin. The results show that the efficiency of GWVT has improved up to 47.85% as obtained from experiments.
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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 systems. According to the test results and system design data, analyses the factors affecting the system performance of three types of ground source heat pump systems.
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Dissertations / Theses on the topic "GWVHP"

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Podeur, Vincent. "Modélisation expérimentale et numérique du power take-off d’un bassin houlomoteur." Electronic Thesis or Diss., Brest, École nationale supérieure de techniques avancées Bretagne, 2022. http://www.theses.fr/2022ENTA0005.

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Les travaux présentés portent sur l'étude du power take off d'un système houlomoteur. Celui-ci est constitué d'un ensemble de bassins connectés entre eux via des clapets souples assurant une circulation à sens unique. Les mouvements de la plate-forme sur laquelle le système est installé induisent un phénomène de ballottement du fluide présent dans ces bassins. Les vagues ainsi générées viennent alors alimenter une cuve cylindrique dont le fond est percé d'un orifice central. Le fluide injecté dans ce réservoir engendre un écoulement de type tourbillon de vidange, dont l’énergie cinétique est extraite par une turbine à axe vertical. La première phase de ces travaux se concentre sur l'étude expérimentale du tourbillon de vidange en écoulement stationnaire. L'évolution du champ de vitesse dans le bassin, avec et sans turbine, est étudié par particle image velocimetry (PIV). En parallèle, la puissance délivrée par la turbine et la hauteur d'eau dans le bassin sont mesurées. Ces résultats sont utilisés pour définir les hypothèses de départ pour la création d'un modèle numérique. La deuxième phase de ces travaux porte sur l'étude expérimentale du tourbillon de vidange en écoulement instationnaire. Un second dispositif de mesure est spécialement construit et instrumenté. Ce dernier permet de modéliser plus fidèlement l'écoulement rencontré dans le système houlomoteur. La méthode PIV est de nouveau utilisée. La dernière phase des travaux porte sur la modélisation numérique de la turbine à axe vertical. Le modèle développé se fonde sur la théorie des écoulements potentiels et prend en compte les effets 3D. Les résultats obtenus sont comparés aux résultats expérimentaux
The present work aims at studying the power take-off of a wave energy converter (WEC). This system is composed of a set of connected tanks. Rubber flaps are installed at tanks inlet and outlet to ensure a one-way flow direction. Thanks to wave induced motions of the supporting platform, sloshing appears inside the WEC tanks which feed a cylindrical basin with a centered drain hole at its bottom. Then, a bathtub vortex flow appears within this tank, where a vertical axis turbine is installed to harvest kinetic energy from the flow. The first phase of this research focuses on studying the steady bathtub flow. To do so, a dedicated experiment is built. Velocity field within the cylindrical basin, with and without the turbine, is studied via Particle Image Velocimetry (PIV). In addition, power production from the turbine and water level inside the tank are measured. These results are used to define starting hypothesis for developing a numerical model of the turbine. The second phase of this research focuses on studying the unsteady bathtub flow. For this purpose, a second experiment is built. This setup provides a more realistic environment, closer to what can be observed with the WEC system. PIV measurements are also used extensively to study the flow with and without the turbine. The last stage of this research focuses on the numerical modelling of the vertical axis turbine. The model is based on the potential flow theory. First, a two-dimensional approach is used to validate the early pieces of the model. Secondly, a three-dimensional approach is adopted to account for more complex flow features. Finally, numerical and experiment results are compared
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Book chapters on the topic "GWVHP"

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Septyaningrum, Erna, Ridho Hantoro, Sarwono, and Ester Carolina. "Parameters Analysis of Vortex Formation on Conical Basin of Gravitational Water Vortex Power Plant (GWVPP)." In Recent Advances in Renewable Energy Systems, 69–78. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1581-9_8.

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Taddia, Glenda, Stefano Lo Russo, and Vittorio Verda. "Comparison Between Neural Network and Finite Element Models for the Prediction of Groundwater Temperatures in Heat Pump (GWHP) Systems." In Engineering Geology for Society and Territory - Volume 6, 255–58. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-09060-3_41.

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Conference papers on the topic "GWVHP"

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Zhang, Chao, Guanghui Zhou, Xiaodan Zhao, and Zhen Zhang. "The Stability Study of the GWHP System with Superheated Vapor Heat Recovery." In 2010 Asia-Pacific Power and Energy Engineering Conference. IEEE, 2010. http://dx.doi.org/10.1109/appeec.2010.5448503.

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Zhou, Guanghui, Chao Zhang, Siqi Cui, and Zhen Zhang. "The Performance Study of the GWHP System with Superheated Vapor Heat Recovery." In 2010 Asia-Pacific Power and Energy Engineering Conference. IEEE, 2010. http://dx.doi.org/10.1109/appeec.2010.5448504.

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Park, Byeong-Hak, Dahee Jung, Bo-Hyun Lee, and Kang-Kun Lee. "THERMAL DISPERSION BEHAVIOR UNDER THE INDUCED FLOW FIELD BY THE GWHP SYSTEM." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-301923.

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Park, Byeong-Hak, and Kang-Kun Lee. "Impacts of injection temperature on the relevant heat transport processes in groundwater heat pump (GWHP) systems." In International Ground Source Heat Pump Association. International Ground Source Heat Pump Association, 2018. http://dx.doi.org/10.22488/okstate.18.000042.

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Park, Byeong-Hak, Seung-Wook Ha, and Kang-Kun Lee. "Minimum Well Separation for Small Groundwater Heat Pump (Gwhp) Systems in Korea: Preliminary Analysis Based on Regional Aquifer Properties." In IGSHPA Technical/Research Conference and Expo 2017. International Ground Source Heat Pump Association, 2017. http://dx.doi.org/10.22488/okstate.17.000515.

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