Article
Geochemistry & Geophysics
Liyu Liu, Heping Li, Hongbin Zhou, Sen Lin, Shengbin Li
Summary: Rock porosity is a crucial physical parameter in evaluating oil and gas reserves. This study presents an experimental apparatus to measure porosity under high isostatic pressure and quantitatively verifies the relationship between porosity and isostatic pressure.
Article
Thermodynamics
Inseok Yang, Daeho Kim
Summary: This study assessed the measurement uncertainty in thermal conductivity of insulation materials at high temperatures using a guarded hot plate apparatus. By employing calibrated thermocouples and proper auxiliary set temperatures, the effect of stray heat flow on the measurements was reduced.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Environmental Sciences
Sai Praneeth, Laureen Saavedra, Maria Zeng, Brajesh K. Dubey, Ajit K. Sarmah
Summary: By replacing sand with biochar as filler material in cement, the flexural strength of the cement mortar can be improved, and thermal conductivity and density can be reduced. The addition of biochar also increases the porosity of the mortar, leading to a decrease in CO2 emissions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Multidisciplinary
Yifeng Ling, Meng Han, Jinqi Xie, Guojuan Qiu, Guoying Dong, Erbiao Min, Ping Zhang, Xiaoliang Zeng, Ruiheng Liu, Rong Sun
Summary: In this study, a transient photo-electro-thermal (TPET) technique was proposed for the measurement of thermal conductivity of thermoelectric thin films. By combining theoretical and experimental methods, it was found that the TPET technique using laser beam heating can effectively reduce the influence of Peltier effect and achieve high test accuracy. This technique is applicable to both free-standing and deposited thin films.
Article
Materials Science, Ceramics
Jakob Konig, Rasmus R. Petersen, Niels Iversen, Yuanzheng Yue
Summary: This study investigates the use of foaming agents to foam cathode-ray-tube panel glass and explores the impact of carbon type, MnxOy, and furnace atmosphere on foaming effect and physical properties of foams. The results show that the best foaming effect is achieved with MnO2 in an oxidizing atmosphere, while oxidation of carbon is facilitated by Mn3O4 in an oxygen-free atmosphere, leading to the formation of CO and open porosity. The study demonstrates the potential for improving thermal insulation by decreasing density in closed-porous samples produced with carbon black and Mn3O4.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Thermodynamics
Shijie Chen, Feihu Zheng, Jiachen Li
Summary: This paper presents a novel method for measuring thermal conductivity of micro-quantity liquid based on the modified thermal pulse method. The factors affecting the measurement range and accuracy of the technique are analyzed through numerical simulations and experiments. The experimental results show that the method has the advantages of low measuring time, low fluid usage, wide measurement range, good sample compatibility, and high accuracy.
APPLIED THERMAL ENGINEERING
(2023)
Article
Materials Science, Ceramics
Xianxi Li, Liwen Yan, Yibo Zhang, Xukun Yang, Anran Guo, Haiyan Du, Feng Hou, Jiachen Liu
Summary: The demand for high-performance lightweight thermal insulation materials in reusable spacecraft and vehicles has led to the development of porous silica ceramics with lightweight, ultra-low thermal conductivity, and enhanced compressive strength. By using different sizes of silica particles, the compressive strength and pore structure integrity of the ceramics were improved. These ceramics have a very low thermal conductivity and are suitable for use as thermal insulation materials in aerospace and space applications.
CERAMICS INTERNATIONAL
(2022)
Article
Metallurgy & Metallurgical Engineering
Aditya Pandey, Pavan Kumar Kattamuri, Bhamidipati S. Sastry
Summary: This study used Lee's apparatus to determine the thermal conductivity of sandstone cores from an Indian coal mine and discussed the method for determining the temperature gradient and calculating thermal conductivity. Properties including specific gravity, specific heat capacity, thermal diffusivity, and porosity of different sandstone cores obtained from the field were also determined and highlighted in this study.
MINING METALLURGY & EXPLORATION
(2021)
Article
Geosciences, Multidisciplinary
C. Zhao, W. Zhou, Q. H. Hu, H. Xu, C. Zhang
Summary: This study measured the porosities of granular samples using a modified bulk density method and helium pycnometry, aiming to assess isolated pores in total porosity. The results showed that the modified bulk density measurement provided semi-quantitative results with acceptable repeatability, and changes in effective porosity were related to grain size for sandstone and chalk, and isolated pores for shales with poor pore connectivity.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Materials Science, Ceramics
Xianxi Li, Liwen Yan, Anran Guo, Haiyan Du, Feng Hou, Jiachen Liu
Summary: Silica-alumina composite porous ceramics with high porosity and low thermal conductivity were prepared by the particle-stabilized foaming method. They have the potential to serve as thermal insulation material in the spacecraft industry.
CERAMICS INTERNATIONAL
(2023)
Article
Construction & Building Technology
Jamal Eldin F. M. Ibrahim, Olga B. Kotova, Shiyong Sun, Emese Kurovics, Mohammed Tihtih, Laszlo A. Gomze
Summary: The study investigates the potential of utilizing zeolite-poor rock and eggshells to produce energy-saving ceramic bricks. Results show that adding 20% eggshell to the samples can generate composite bricks with the lowest density and thermal conductivity, while meeting the standard compressive strength requirements. This alternative is a promising and cost-effective option for sustainable development.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Akshay U. Shirsat, Anuj Kumar, P. V. P. Moorthi, Athira Gopinath, Arunkumar Sridharan, Shyamprasad Karagadde, Prakash Nanthagopalan, P. K. Baburajan, R. S. Rao, Anuj Kumar Deo, S. V. Prabhu
Summary: This study proposes a step-wise transient method based on a semi-infinite medium principle to measure the different thermal properties of ferro siliceous sacrificial concrete (FSSC) using transient temperature measurement and a simple data processing approach. The measured thermophysical properties provide insights into the ablation behavior of FSSC during molten core-corium interaction in nuclear power plants. The results show variations in specific heat, thermal conductivity, thermal diffusivity, and thermal effusivity, and demonstrate discrepancies with existing models.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Multidisciplinary Sciences
Shuai Yue, Fei Tian, Xinyu Sui, Mohammadjavad Mohebinia, Xianxin Wu, Tian Tong, Zhiming Wang, Bo Wu, Qing Zhang, Zhifeng Ren, Jiming Bao, Xinfeng Liu
Summary: Researchers used pump-probe transient reflectivity microscopy to monitor the diffusion of photoexcited carriers in semiconducting cubic boron arsenide (c-BAs) and obtained their mobility. The experiments revealed a high ambipolar mobility for c-BAs, indicating its potential applications in high-performance electronics and optoelectronics.
Article
Soil Science
Hailong He, Lanmin Liu, Miles Dyck, Bingcheng Si, Jialong Lv
Summary: This study conducted a comprehensive review of available Adry models, compiled a large dataset of Adry measurements, and evaluated 48 models, all of which performed unsatisfactorily. It was suggested that models should be chosen based on the availability of soil information.
SOIL & TILLAGE RESEARCH
(2021)
Article
Materials Science, Characterization & Testing
Peipei Liu, Kiyoon Yi, Ikgeun Jeon, Hoon Sohn
Summary: This study developed a transient thermoreflectance (TTR) technique using a femtosecond laser for porosity inspection in directed energy deposition (DED) additive manufacturing. By comparing thermoreflectance measured at different pump excitation modulation frequencies, the technique is sensitive to porosity rather than thermal property variation. The noncontact nature and scanning capability of the proposed technique make it feasible for in-situ monitoring of porosity during DED additive manufacturing.
NDT & E INTERNATIONAL
(2021)
Article
Geosciences, Multidisciplinary
Massimo Verdoya, Paolo Chiozzi
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2018)
Article
Geosciences, Multidisciplinary
P. Chiozzi, M. Verdoya
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2018)
Review
Geochemistry & Geophysics
Paolo Chiozzi, Alae-Eddine Barkaoui, Abdelkrim Rimi, Massimo Verdoya, Yassine Zarhloule
JOURNAL OF GEODYNAMICS
(2017)
Article
Chemistry, Inorganic & Nuclear
M. Verdoya, P. Chiozzi, P. De Felice, V. Pasquale, M. Bochiolo, I. Genovesi
APPLIED RADIATION AND ISOTOPES
(2009)
Article
Thermodynamics
Massimo Verdoya, Chiara Pacetti, Paolo Chiozzi, Chiara Invernizzi
APPLIED THERMAL ENGINEERING
(2018)
Article
Geochemistry & Geophysics
V. Pasquale, G. Gola, P. Chiozzi, M. Verdoya
GEOPHYSICAL JOURNAL INTERNATIONAL
(2011)
Article
Geochemistry & Geophysics
V. Pasquale, P. Chiozzi, M. Verdoya, G. Gola
GEOPHYSICAL JOURNAL INTERNATIONAL
(2012)
Article
Geosciences, Multidisciplinary
M. Bochiolo, M. Verdoya, P. Chiozzi, V. Pasquale
JOURNAL OF APPLIED GEOPHYSICS
(2012)
Article
Geochemistry & Geophysics
V. Pasquale, P. Chiozzi, M. Verdoya
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2010)
Review
Green & Sustainable Science & Technology
V. Pasquale, M. Verdoya, P. Chiozzi
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2014)
Article
Energy & Fuels
Massimo Verdoya, Paolo Chiozzi, Gianluca Gola
Summary: This study proposed a method to infer steady-state conductive heat flow in tectonically active regions by utilizing a minimization technique. New heat flow data was obtained by considering temperatures, radiogenic heat production, and thermal conductivity variation with depth. The research successfully differentiated thermal regimes and provided estimates on crustal radiogenic heat contribution, revealing a correlation between heat flow decrease towards the east and rheological and tectonic settings in orogenic areas.
Proceedings Paper
Green & Sustainable Science & Technology
Elie El Jbeily, Massimo Verdoya, Paolo Chiozzi, Roberta Ivaldi, Afif Ghaith
TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY (TMREES19)
(2019)
Article
Geochemistry & Geophysics
V. Pasquale, M. Verdoya, P. Chiozzi
BOLLETTINO DI GEOFISICA TEORICA ED APPLICATA
(2010)
Article
Geochemistry & Geophysics
Vincenzo Pasquale, Massimo Verdoya, Paolo Chiozzi, Egidio Armadillo
ANNALS OF GEOPHYSICS
(2009)
Article
Energy & Fuels
Luis Salala, Jonathan Argueta, Noel Lopez, Osmany Aparicio, Diana Martinez, Pedro Santos, Arturo Quezada, Oziel Garcia, Jose Erazo, Hiroyuki Yamagishi, Noriyoshi Tsuchiya
Summary: Geothermal systems have significant potential to replace reliance on fossil fuels. El Salvador, being tectonically active, already supplies a significant portion of its electricity demand using volcanic geothermal fields. The study compares different geothermal areas in El Salvador and highlights the controlling factors in the characteristics of geothermal reservoirs.
Article
Energy & Fuels
Lin Jia, Kewen Li, Yun Han, Chi Zhang, Lipeng Zhao
Summary: This study proposes a new approach of retrofitting abandoned oil wells into geothermal wells, and investigates the effects of different parameters on the performance using a numerical model. The results show that the enhanced fracture system significantly improves the efficiency of geothermal energy extraction, and optimal design should control the flow rate and use proppant.
Article
Energy & Fuels
K. H. Kvalsvik, H. Holmberg, R. K. Ramstad, K. Midttomme
Summary: This study proposes a new analytical equation that takes into account the advective heat in fractured rock, improving the accuracy of measuring thermal properties in borehole heat exchangers. The equation is applicable to all thermal response tests and provides a cost-effective alternative to numerical modelling.
Article
Energy & Fuels
Ronald Dipippo
Summary: This paper presents a technique of further preheating the working fluid in geothermal binary plants using extraction turbines, and evaluates the performance at various geofluid temperatures through working equations. The results indicate that this approach can be equally effective in geothermal binary plants as it is in conventional nuclear power plants.
Article
Energy & Fuels
Y. A. Popov, E. M. Chekhonin, E. G. Savelev, D. A. Ostrizhniy, A. B. Shakirov, R. A. Romushkevich, E. A. Babich, B. E. Andreyev, M. Y. Spasennykh, I. A. Sannikova
Summary: This paper describes the results of experimental geothermal studies on the formation surrounding the Savitskaya-300 well in the Volga-Ural oil and gas basin. The study found high thermal heterogeneity and anisotropy in the formation. The paper provides important data on thermal properties and heat flow variations in the well.
Article
Energy & Fuels
Viren Thakore, Hong Wang, Jy-An Wang, Yarom Polsky, Fei Ren
Summary: This paper focuses on the stability of foam-based fracturing fluid under high temperature and high pressure conditions. It is of significant importance for the development of foam fracturing fluid as an alternative to conventional water-based fracturing fluid in Enhanced Geothermal System (EGS). Experimental results show that with the appropriate selection of surfactants and stabilizing agents, stable foams can be obtained. Analytical models are developed to predict the foam stability for different foam compositions, considering the effects of temperature and pressure.
Article
Energy & Fuels
Hong Chang, Sheng Jiang, Haozhi Jiang, Yunjie Li, Zhengheng Gan, Songying Zhao
Summary: This study compared the bearing performance between phase change energy piles (GPEP) and traditional energy piles (TEP) using indoor modeling tests and theoretical formulas. The results showed that GPEP increased the ultimate bearing capacity of a single pile by about 13% compared to TEP. Additionally, the phase change materials effectively restricted the temperature-drag response of energy piles.
Article
Energy & Fuels
Qiang Zhang, Tiago Alves
Summary: This study investigates the influence of salt structures and faults on the geothermal potential in the Cleaver Bank High, Southern North Sea, using high-quality 3D seismic reflection data and bottom-hole temperature data. The results show that salt structures and faults play a significant role in the geothermal gradient, with higher gradients found on the footwalls of faults. Three potential geothermal exploration targets are identified based on the findings.
Article
Energy & Fuels
Hubert Langevin, Nicolo Giordano, Jasmin Raymond, Louis Gosselin, Martin Bourbonnais
Summary: This study evaluates the efficiency and cost of solar-assisted geothermal systems in a subarctic climate, and offers recommendations for optimizing ground heat exchanger configurations.
Article
Energy & Fuels
Lei Chen, Jinchuan Zhang, Longfei Xu, Shijing Chen, Qianchao Li, Yuhang Sun, Jie Li, Xingxu Zhao
Summary: This study assesses the geothermal water circulation process of a granite geothermal system in the Lancang area, Yunnan using water chemistry and isotope analysis techniques. The results show that the geothermal water originates from atmospheric precipitation and the granite pluton serves as the main heat source. Additionally, the fault system plays an important role in the discharge and mixing of hot and cold water.
Review
Energy & Fuels
Md Azhar, Somenath Mondal, Anh Minh Tang, Akhileshwar K. Singh
Summary: Contemporary geotechnical engineering practice involves the design and construction of structures that encounter thermal cycles. Understanding the effect of temperature on soil mechanical properties is challenging, but there have been significant contributions from numerous studies. However, to date, there is no comprehensive review that provides a holistic development of the subject and its connection to field applications.
Article
Energy & Fuels
Mark White, Yaroslav Vasyliv, Koenraad Beckers, Mario Martinez, Paolo Balestra, Carlo Parisi, Chad Augustine, Gabriela Bran-Anleu, Roland Horne, Laura Pauley, Giorgia Bettin, Theron Marshall, Anastasia Bernat
Summary: The study presents a comprehensive numerical modeling of closed-loop geothermal systems (CLGSs) and develops a publicly accessible web application for feasibility studies. The results suggest that competitive levelized cost of heat (LCOH) can be achieved, but significant reductions in drilling costs are required to achieve competitive levelized cost of electricity (LCOE). A site-based case study for multi-lateral systems and the analysis of permeable wet rock are also provided, indicating the potential for improved power production with higher reservoir permeability and temperature.
Article
Energy & Fuels
Xiaoming Tian, Oleg Volkov, Denis Voskov
Summary: In this study, an efficient and flexible adjoint-based framework is proposed for history matching and forecasting geothermal energy extraction. The framework reduces the parameter space using Principal Component Analysis and speeds up the iteration process using the adjoint method. Operator-based linearization is used for efficient calculation and matrix assembly. The framework is demonstrated to be highly efficient for a heterogeneous reservoir with multiple realizations, generating reliable history-matching results.
Article
Energy & Fuels
Asrillah Asrillah, Agus Abdullah, Klaus Bauer, Ben Norden, Charlotte M. Krawczyk
Summary: At the Gross Scho center dot nebeck geothermal research platform in the NE German Basin, the degree and direction of azimuthal velocity anisotropy caused by sub-vertical fracturing were determined through analysis of 3-D seismic reflection data. The observed anisotropy above the Zechstein salt roughly correlates to fault structures formed by an upwelling salt pillow, while below the salt, the less pronounced anisotropy and interpreted fracturing follow the trend of the regional stress field.
Article
Energy & Fuels
Kyosuke Okamoto, Yusuke Mukuhira, Dian Darisma, Hiroshi Asanuma, Hirokazu Moriya
Summary: Microseismic monitoring is crucial in geothermal development, and manual phase picking for seismic data is time-consuming. Existing deep learning phase pickers may face challenges in geothermal fields due to their unique features. This study focuses on developing a specialized deep learning model for local seismic networks in geothermal fields, allowing automatic hypocenter determinations and revealing subsurface fine structures.
