Article
Energy & Fuels
Zhenpeng Deng, Yongle Nian, Qun Liu, Wen -long Cheng
Summary: A novel PCM-grouted borehole heat exchanger (BHE) is proposed for all-season operation using a single shape-stabilized PCM (SSPCM) with phase change hysteresis (PCH). A heat transfer model considering PCH is established to evaluate the thermal performance of the BHE. Results show that octadecane SSPCM with PCH exhibits the best comprehensive performance, with energy storage rates of 68.9 W/m in heating and 75.9 W/m in cooling, higher than conventional BHE with backfill material.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Green & Sustainable Science & Technology
Hossein Javadi, Javier F. Urchuegua, Borja Badenes, Miguel A. Mateo, Ali Nejad Ghafar, Ojas Arun Chaudhari, Giedrius Zirgulis, Lenin G. Lemus
Summary: A laboratory-scale prototype of a borehole field is designed and built to assess the performance of various innovative grouting products. Experimental and numerical analysis are conducted to evaluate the thermal properties and energy storage capacity of different grout formulations. The results provide insights into the application of these grouts in borehole heat exchangers and thermal energy storage systems.
Article
Thermodynamics
Mohammed A. Hefni, Minghan Xu, Ahmad F. Zueter, Ferri Hassani, Mohamed A. Eltaher, Haitham M. Ahmed, Hussein A. Saleem, Hussin A. M. Ahmed, Gamal S. A. Hassan, Khaled I. Ahmed, Essam B. Moustafa, Emad Ghandourah, Agus P. Sasmito
Summary: We propose a novel three-dimensional analytical framework that accurately predicts and evaluates the thermal performance of geothermal borehole systems with single or multiple heat exchangers. The model includes solving the radial and axial temperature profiles, as well as extending to a three-dimensional arrangement. The framework enables accurate and efficient prediction of transient temperature profiles for geothermal boreholes, facilitating thermal design and implementation of geothermal systems.
APPLIED THERMAL ENGINEERING
(2022)
Article
Engineering, Chemical
Antonin Kunz, Martin Klempa, Petr Bujok, Dawid Piotrowski
Summary: This study examines the impact of climate change on the dimensioning process and performance of borehole heat exchangers (BHEs), highlighting the importance of considering climate change in the design process.
Article
Construction & Building Technology
Siddarth Durga, Koenraad F. Beckers, Milton Taam, Frank Horowitz, Lawrence M. Cathles, Jefferson W. Tester
Summary: Using BTES to store excess summer steam for heating Snee Hall on Cornell campus in cold winter climate is technically and economically feasible, resulting in increased heating efficiency, reduced carbon emissions, and significant cost savings over the long term.
ENERGY AND BUILDINGS
(2021)
Article
Energy & Fuels
Qijie Ma, Peijun Wang, Jianhua Fan, Assaf Klar
Summary: This study proposes storing solar thermal energy underground via energy piles and investigates the short-term performance of the system under various controlling parameters. The experiments show that soil saturation and solar radiation intensity are the main factors affecting the energy storage performance of the pile system under abundant solar radiation.
Article
Construction & Building Technology
Nan Cheng, Chaohui Zhou, Yongqiang Luo, Junhao Shen, Zhiyong Tian, Deyu Sun, Jianhua Fan, Ling Zhang, Jie Deng, Marc A. Rosen
Summary: This study proposes a new design concept called the shallow-deep-mixed borehole heat exchanger (SD-BHE) array, which combines both shallow borehole heat exchangers (SBHEs) and deep borehole heat exchangers (DBHEs). The DBHE tube can be switched to an SBHE tube in the summer, solving the limitations of both SBHEs and DBHEs. The study finds that when the cooling load of a building is greater than the heating load, the SD-BHE array has less impact on the ground temperature and provides better stability of the outlet water temperature compared to the SBHE array.
ENERGY AND BUILDINGS
(2023)
Article
Thermodynamics
Xiang Li, Selin Yilmaz, Martin K. Patel, Jonathan Chambers
Summary: The integration of fifth-generation district heating and cooling (5GDHC) with borehole thermal energy storage (BTES) can unlock synergies between heating and cooling, leading to advantages in terms of cost, emissions, efficiency, and electricity load. However, high upfront costs and the ratio of cooling to heating demand can affect the economic performance of this integrated system.
Article
Green & Sustainable Science & Technology
Charles Maragna, Charlotte Rey, Marc Perreaux
Summary: The paper presents a system that combines solar thermal collectors, borehole thermal energy storage, a heat pump, and a backup boiler for space heating and domestic hot water production. The integration of components and overall control strategy are described, and the system is found to be flexible in selecting and utilizing the best thermal source. The contribution of each subsystem to the energy mix is discussed.
Article
Energy & Fuels
Tomasz Sliwa, Patryk Lesniak, Aneta Sapinska-Sliwa, Marc A. Rosen
Summary: This paper describes a study on the construction of borehole heat exchangers for geothermal heat pumps. The aim of the research is to determine the best design for these heat exchangers. The thermal efficiency is evaluated using parameters obtained from thermal response tests. The study finds that a single U-tube system filled with gravel is the most advantageous design.
Article
Construction & Building Technology
Liang Shi, Ming Qu, Xiaobing Liu, Lingshi Wang, Mingkan Zhang
Summary: This paper focuses on the study of a novel dual-purpose underground thermal battery (DPUTB) system that integrates a dual-source heat pump with hybrid thermal storage. A simplified dynamic model for the DPUTB is developed and validated using experimental data. The results of a parametric study show that the thermal conductivity of the inner tank shell and the melting point of the phase change material are the two most influential factors on the performance of the DPUTB. Future research will incorporate the DPUTB model into a dual-source heat pump system to evaluate the overall performance of demand side management.
ENERGY AND BUILDINGS
(2022)
Article
Thermodynamics
Shuai Huang, Jiqin Li, Ke Zhu, Jiankai Dong, Ji Li, Yiqiang Jiang
Summary: This paper investigates the mechanism and design methods of heat storage in deep borehole heat exchanger (DBHE) systems and explores their effects on system operation. The results indicate that fluid inflow from the inner pipe can enhance heat storage power. Increasing the inlet water temperature is more effective in improving heat storage power.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Energy & Fuels
Lucija Magdic, Tea Zakula, Luka Boban
Summary: This paper provides recommendations for improved analyses of ground-coupled heat pump performance. It argues that most research on ground-coupled heat pumps focuses too much on improving the performance of borehole heat exchangers (BHE) and underestimates the potential improvements of the entire system. The paper shows that modifications to individual BHE parameters have limited impact on overall system performance, and that simultaneous modifications of all parameters can lead to significant reductions in total system energy consumption.
Article
Engineering, Civil
Sara Barbieri, Matteo Antelmi, Sorab Panday, Martina Baratto, Adriana Angelotti, Luca Alberti
Summary: Geothermal resource exploitation has shown constant growth in recent years, with low-temperature geothermal energy being used as a cost-effective and green solution for building air conditioning. The design of BHE and correct interpretation of TRT are crucial for meeting building energy demand.
JOURNAL OF HYDROLOGY
(2022)
Article
Energy & Fuels
Joanna Piotrowska-Woroniak
Summary: This study aimed to verify specific ground thermal efficiency indicators adopted for the design of the lower heat source of borehole heat exchangers (BHE) through experimental tests. The research compared and analyzed the operating parameters of BHEs, including thermal energy absorption, temperature differentials, brine flow rates, and power output in two heating seasons. The data obtained in real conditions is valuable for the research and development of BHE systems.
Article
Energy & Fuels
T. Sliwa, M. A. Rosen
Article
Energy & Fuels
Tomasz Sliwa, Michal Kruszewski, Alireza Zare, Mohsen Assadi, Aneta Sapinska-Sliwa
Article
Chemistry, Multidisciplinary
Anna Bieda, Tomasz Kowalski, Tomasz Sliwa, Daniel Skowronski, Iwona Kowalska-Kubsik, Robert Rado
PRZEMYSL CHEMICZNY
(2018)
Article
Energy & Fuels
Aneta Sapinska-Sliwa, Marc A. Rosen, Andrzej Gonet, Joanna Kowalczyk, Tomasz Sliwa
Article
Energy & Fuels
Tomasz Sliwa, Anna Sojczynska, Marc A. Rosen, Tomasz Kowalski
Article
Energy & Fuels
Tomasz Sliwa, Kinga Jarosz, Marc A. Rosen, Anna Sojczynska, Aneta Sapinska-Sliwa, Andrzej Gonet, Karolina Fafera, Tomasz Kowalski, Martyna Ciepielowska
Article
Energy & Fuels
Aneta Sapinska-Sliwa, Tomasz Sliwa, Kazimierz Twardowski, Krzysztof Szymski, Andrzej Gonet, Pawel Zuk
Article
Energy & Fuels
Tomasz Sliwa, Aneta Sapinska-Sliwa, Tomasz Wysoglad, Tomasz Kowalski, Izabela Konopka
Summary: The article introduces a cement slurry formula with the addition of graphite and graphene as a material for load-bearing piles, aiming to solve engineering problems in construction. Introducing U-tubes into the piles to exchange heat with the rock mass, known as energy piles, could potentially contribute to industrial applications in the future.
Review
Energy & Fuels
Tomasz Sliwa, Aneta Sapinska-Sliwa, Michal Korzec, Andrzej Gonet, Marek Jaszczur, Martyna Ciepielowska, Artur Gajdosz
Summary: The paper discusses the potential of using rotary-percussion drilling to reduce drilling costs in the Lublin Basin, highlighting the geological structures and data analysis supporting its viability in this region compared to other Polish shale basins.
Article
Energy & Fuels
Tomasz Sliwa, Aneta Sapinska-Sliwa, Andrzej Gonet, Tomasz Kowalski, Anna Sojczynska
Summary: Geothermal energy can be extracted and utilized through geothermal wells and borehole heat exchangers, with geothermal wells used to harvest geothermal water from aquifers and geothermal injection wells used to reinject the collected geothermal water back into the ground.
Article
Energy & Fuels
Tomasz Sliwa, Tomasz Kowalski, Dominik Cekus, Aneta Sapinska-Sliwa
Summary: Renewable energy, specifically geothermal energy, is becoming increasingly important in the energy sector. The efficiency of heating or heating-and-cooling systems utilizing borehole heat exchanger systems relies heavily on the design of the borehole heat exchangers and the sealing slurry used. A proposed design for a sealing slurry with powdered magnesium additive was tested, with the highest thermal conductivity values achieved in design C.
Article
Energy & Fuels
Tomasz Sliwa, Patryk Lesniak, Aneta Sapinska-Sliwa, Marc A. Rosen
Summary: This paper describes a study on the construction of borehole heat exchangers for geothermal heat pumps. The aim of the research is to determine the best design for these heat exchangers. The thermal efficiency is evaluated using parameters obtained from thermal response tests. The study finds that a single U-tube system filled with gravel is the most advantageous design.
Review
Energy & Fuels
Abdelazim Abbas Ahmed, Mohsen Assadi, Adib Kalantar, Tomasz Sliwa, Aneta Sapinska-Sliwa
Summary: This paper provides a literature review on the use of shallow geothermal energy (SGE) for heating and cooling purposes. It discusses the latest advances in materials, new innovative structures, and techno-economic optimization approaches. The potential of SGE is introduced, and innovative borehole structures to improve performance and reduce installation cost are outlined. Different types of conventional and thermally enhanced collectors and grouts are extensively surveyed, with a focus on techno-economic analysis and optimization approaches.
Article
Green & Sustainable Science & Technology
Abdelazim Abbas Ahmed, Mohsen Assadi, Adib Kalantar, Aneta Sapinska-Sliwa, Tomasz Sliwa, Naveed Ahmed, Szymon Rogozik
Summary: The recent experience of climate change, geopolitical conditions, energy insecurity and supply disruptions highlights the importance of accelerating the transition to green energy and reducing dependence on fossil fuels. This paper presents a case study that assesses and compares five different energy solutions for heating and cooling. Based on the proposed techno-economic framework, the results show that air-source and ground-source heat pumps are currently profitable under existing subsidy schemes.
ENERGY FOR SUSTAINABLE DEVELOPMENT
(2023)
Article
Mining & Mineral Processing
Dagmara Zeljas, Robert Rado, Iwona Kowalska-Kubsik, Tomasz Sliwa, Aleksandra Jamrozik
ARCHIVES OF MINING SCIENCES
(2019)
