Article
Green & Sustainable Science & Technology
Hakki Aydin, Sukru Merey
Summary: This study investigates the potential of geothermal energy production from a depleted carbon dioxide gas field in Turkey, the Dodan Gas field. The field has low enthalpy brine that can be utilized for direct-use applications such as green housing, agricultural drying, and district heating. Monte Carlo simulations show that the field has significant recoverable geothermal energy potential.
Article
Environmental Sciences
Robert Egert, Fabian Nitschke, Maziar Gholami Korzani, Thomas Kohl
Summary: Accurate quantification of spatially resolved fluid flow within fractures is crucial for successful reservoir development. This study presents an innovative workflow to model and characterize preferential flow paths within rough-walled shear fractures. The study uses comprehensive statistical analysis to analyze the geometric and transport properties of flow paths in the non-simplified three-dimensional fractured void space under typical geothermal flow conditions. The results show that there are significant differences in fluid flow distribution and behavior between perpendicular and parallel shearing directions.
WATER RESOURCES RESEARCH
(2023)
Article
Engineering, Geological
Yuedu Chen, Zhihong Zhao, Huan Peng
Summary: This study investigates the impact of intersected fractures on heat transfer in geothermal systems, finding that rough dead-end fractures enhance heat transfer and increasing the intersected angle is beneficial for heat production, while enlarging the aperture has little effect.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Michal Kaczmarczyk, Barbara Tomaszewska, Wieslaw Bujakowski
Summary: The study focuses on the twofold utilization of geothermal water potential in desalination processes and evaluates the feasibility of integrating electricity generation based on membrane techniques. The results show high quality of permeate produced by using geothermal water in a semi-production scale with regards to physical, chemical, microbiological, potential organic, toxic substance contents, and radiological characteristics. Additionally, an analysis on implementing organic Rankine cycle or Kalina cycle using geothermal water extracted at temperatures of 80-95 degrees C was carried out.
Article
Geosciences, Multidisciplinary
Hongwu Lei, Yingchun Xie, Jin Li, Xuewen Hou
Summary: Two-phase flow in high temperature geothermal wells, where water flows in both liquid and gas phases with a non-condensable gas like CO2, is crucial for production performance and wellbore scaling evaluations. This paper presents discharge tests in the Yangbajing geothermal field in Tibet and introduces a simple model for simulating two-phase flow with CO2. The results show that considering the velocity difference between gas and liquid phases is essential to accurately predict the pressure and temperature profiles. Additionally, three drift flux models (DFMs) are compared to assess their performance.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Engineering, Civil
Xuefeng Gao, Yanjun Zhang, Yuxiang Cheng, Ziwang Yu, Yibin Huang
Summary: This study investigates the impact of aperture variability on flow field organization and heat transport behavior in fractured geothermal reservoirs. Two observational parameters for production prediction are developed, and it is found that considering the correlation length is crucial for accurate predictions. The results also suggest that the traditional parallel plate model may overestimate production temperature, but using an effective hydraulic aperture can capture the production trend in fractured geothermal reservoirs.
JOURNAL OF HYDROLOGY
(2022)
Article
Green & Sustainable Science & Technology
Juan C. Santamarta, Alejandro Garcia-Gil, Maria del Cristo Exposito, Elias Casanas, Noelia Cruz-Perez, Jesica Rodriguez-Martin, Miguel Mejias-Moreno, Gregor Goetzl, Vasiliki Gemeni
Summary: This study investigates the transition from conventional heat production systems to shallow geothermal energy systems in nine touristic infrastructures in the Canary Islands, showing significant energy savings and CO2 emission reductions per installation per year. Shallow geothermal technology offers economical, energetical, and environmental advantages in volcanic islands with high demand for heating and cooling due to tourism.
Article
Energy & Fuels
Fengjun Huang, Hong Li, Kun Ji, Qianqian Ma, Shuaiwu Gou
Summary: This paper proposes a new method to increase CBM production by using medium enthalpy dry rock geothermal stimulation. The system takes geothermal energy as heat supply and coalbed methane as injection source, overcoming the problems of traditional thermal injection stimulation technology and achieving better stimulation effect.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2022)
Review
Energy & Fuels
Keivan Khaleghi, Silviu Livescu
Summary: This article reviews the basic knowledge, design methods, and performance analysis of vertical closed-loop geothermal heat pump (GHP) systems, emphasizing the importance of the subsurface. GHP technology is compared with air source heat pump (ASHP) technology, and its impact on grid peak load is discussed. Common system architectures, design and simulation methods, subsurface characterization, and environmental aspects are also covered.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
P. Dalampakis, M. Papachristou, P. Neofotistos
Summary: Aristino-Traianoupolis area in Greece is home to one of the most significant water-dominated low-temperature geothermal fields, with great potential and research value. Through the comprehensive evaluation of temperature data from the past 25 years, we have discovered abundant geothermal resources in the region and provided recommendations for further deep exploration and drilling.
Article
Mathematics
Yang Wang, Denis Voskov
Summary: Simulation of heat production in high-enthalpy geothermal systems involves complex physical processes and nonlinearity due to phase transition. To address the issue of stalling behavior in conventional nonlinear solvers, a continuous localization approach based on Operator-Based Linearization (OBL) is proposed for Newton's method. By performing Newton iterations in parameter space with different resolutions, the approach enables quicker convergence to localized solutions and avoids stalling behavior.
Article
Environmental Sciences
Chao Qin, Yafeng Gou, Yuhang Wang, Yuhao Mao, Hong Liao, Qin'geng Wang, Mingjie Xie
Summary: The study conducted measurements of organic aerosols in a suburban area of the western Yangtze River Delta, revealing that polyols were primarily distributed in the particle phase. Different partitioning schemes were proposed to explore the impact of aerosol liquid water on the gas-particle partitioning of polyol tracers.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Geosciences, Multidisciplinary
Zhao Jiayi, Wang Guiling, Zhang Cuiyun, Xing Linxiao, Li Man, Zhang Wei
Summary: The hydrogeochemical characteristics of geothermal fluids in Western Sichuan were studied, revealing the differences and similarities in the types and sources of underground hot waters in the Batang and Litang areas. Groundwater recharge is mainly obtained from precipitation.
ACTA GEOLOGICA SINICA-ENGLISH EDITION
(2021)
Article
Energy & Fuels
Fuqiang Xu, Tianshou Ma, Yijia Tang, Xianzhi Song, Yu Shi
Summary: Enhanced geothermal system with vertical multi-fractures has potential as a heat extraction method. A new analytical model for fluid flow and heat transfer in these systems was proposed and validated, with analysis on the impact of parameters on heat extraction efficiency.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2021)
Review
Energy & Fuels
David B. Walls, David Banks, Adrian J. Boyce, Neil M. Burnside
Summary: This study explores the potential of using flooded mines as a source of low-carbon thermal energy production and storage, analyzes the methods of extracting heat from mines, and examines the risks and challenges faced during operation.
Article
Thermodynamics
Mahsa Taghavi, Swapnil Sharma, Vemuri Balakotaiah
Summary: This study investigates the natural convection effects in the insulation layers of spherical storage tanks and their impact on the tanks' performance. The permeability and Rayleigh number of the insulation material are considered as key factors. The results show that as the Rayleigh number increases, new convective cells emerge and cause the cold boundary to approach the external hot boundary. In the case of large temperature differences, multiple solutions may coexist.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyang Xu, Fangjun Hong, Chaoyang Zhang
Summary: This study introduces a self-induced jet impingement device for enhancing pool boiling performance in high power electronic cooling. Through visualization and parametric investigations, the effects of this device on pool boiling performance are studied, revealing the promotion of additional liquid supply and vapor exhausting. The flow rate of the liquid jet is found to positively impact boiling performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Wenchao Ke, Yuan Liu, Fissha Biruke Teshome, Zhi Zeng
Summary: Underwater wet laser welding (UWLW) is a promising and labor-saving repair technique. A thermal multi-phase flow model was developed to study the heat transfer, fluid dynamics, and phase transitions during UWLW. The results show that UWLW creates a water keyhole, making the welding environment similar to in air laser welding.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Xingrong Lian, Lin Tian, Zengyao Li, Xinpeng Zhao
Summary: This study investigates the heat transfer mechanisms in natural fiber-derived porous structures and finds that thermal radiation has a significant impact on the thermal conductivity in low-density regions, while natural convection rarely occurs. Insulation materials derived from micron-sized natural fibers can achieve minimum thermal conductivity at specific densities. Strategies to lower the thermal conductivity include increasing porosity and incorporating nanoscale pores using nanosize fibers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Yasir A. Malik, Kilian Koebschall, Stephan Bansmer, Cameron Tropea, Jeanette Hussong, Philippe Villedieu
Summary: Ice crystal icing is a significant hazard in aviation, and accurate modeling of sticking efficiency is essential. In this study, icing wind tunnel experiments were conducted to quantify the volumetric liquid water fraction, sticking efficiency, and maximum thickness of ice layers. Two measurement techniques, calorimetry and capacitive measurements, were used to measure the liquid water content and distribution in the ice layers. The experiments showed that increasing wet bulb temperatures and substrate heat flux significantly increased sticking efficiency and maximum ice layer thickness.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinqi Hu, Tongtong Geng, Kun Wang, Yuanhong Fan, Chunhua Min, Hsien Chin Su
Summary: This study experimentally examined the heat dissipation of vibrating fans and demonstrated its inherent mechanism through numerical simulation. The results showed that the flow fields induced by the vibrating blades exhibited pulsating features and formed large-scale and small-scale vortical structures, significantly improving heat dissipation. The study also identified the impacts of different blade structures and developed a trapezoidal-folding blade, which effectively reduced the maximum temperature of the heat source and alleviated high-temperature failure crisis.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Dan-Dan Su, Xiao-Bin Li, Hong-Na Zhang, Feng-Chen Li
Summary: The boiling heat transfer of low-boiling-point working fluid is a common heat dissipation technology in electronic equipment cooling. This study analyzed the interfacial boiling behavior of R134a under different conditions and found that factors such as the initial thickness of the liquid film, solid-liquid interaction force, and initial temperature significantly affect the boiling mode and thermal resistance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyi Wu, Dongke Sun, Wei Chen, Zhenhua Chai
Summary: A unified lattice Boltzmann-phase field scheme is proposed to simulate dendrite growth of binary alloys in the presence of melt convection. The effects of various factors on the growth are investigated numerically, and the model is validated through comparisons and examinations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shaokun Ge, Ya Ni, Fubao Zhou, Wangzhaonan Shen, Jia Li, Fengqi Guo, Bobo Shi
Summary: This study investigated the temperature distribution of main cables in a suspension bridge during fire scenarios and proposed a prediction model for the maximum temperature of cables in different lane fires. The results showed that vehicle fires in the emergency lane posed a greater thermal threat to the cables.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shuang-Ying Wu, Shi-Yao Zhou, Lan Xiao, Jia Luo
Summary: This paper investigates the two-phase flow and heat transfer characteristics of low-velocity jet impacting on a cylindrical surface. The study reveals that the heat transfer regimes are non-phase transition and nucleate boiling with the increase of heat transfer rate. The effects of jet impact height and outlet velocity on local surface temperatures are pronounced at the non-phase transition stage. The growth rates of heat transfer rate and liquid loss rate increase significantly from the non-phase transition to nucleate boiling stage.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Emad Hasani Malekshah, Wlodzimierz Wlodzimierz, Miros law Majkut
Summary: Cavitation has significant practical importance and can be controlled by air injection. This study investigates the natural to ventilated cavitation process around a hydrofoil through numerical and experimental methods. The results show that the location and rate of air injection have a meaningful impact on the characteristics of cavitation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Feriel Yahiat, Pascale Bouvier, Antoine Beauvillier, Serge Russeil, Christophe Andre, Daniel Bougeard
Summary: This study explores the enhancement of mixing performance in laminar flow equipment by investigating the generation of chaotic advection using wall deformations in annular geometries. The findings demonstrate that the combined geometry can achieve perfect mixing at various Reynolds numbers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Hui He, Ning Lyu, Caihua Liang, Feng Wang, Xiaosong Zhang
Summary: This study investigates the condensation, frosting, and defrosting processes on superhydrophobic surfaces with millimeter-scale structures. The results reveal that the structures can influence the growth and removal of frost crystals, with the bottom grooves creating a frost-free zone and conical edges promoting higher frost crystal heights. Two effective methods for defrosting are observed: hand-lifting the groove and airfoil retraction contraction on protruding structures. This research provides valuable insights into frost formation and defrosting on millimeter-structured superhydrophobic surfaces, with potential applications in anti-frost engineering.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Thiwanka Arepolage, Christophe Verdy, Thibaut Sylvestre, Aymeric Leray, Sebastien Euphrasie
Summary: This study developed two thermal concentrators, one with a 2D design of uniform thickness and another with a 3D design, using the coordinate transformation technique and metamaterials. By structuring the thermal conductor, the desired local density-heat capacity product and anisotropic thermal conductivities were achieved. The homogenized thermal conductivities were obtained from finite element simulations and cylindrical symmetry consideration. A 3D concentrator was fabricated using 3D metal printing and characterized using a thermal camera. Compared to devices that solely consider anisotropic conductivities, the time evolution characteristics of the metadevice designed with coordinate transformation were closer to those of an ideal concentrator.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Liangyuan Cheng, Qingyang Wang, Jinliang Xu
Summary: In this study, we investigated the supercritical heat transfer of CO2 in a horizontal tube with a diameter of 10.0 mm, covering a wide range of pressures, mass fluxes, and heat fluxes. The study revealed a non-monotonic increase in wall temperatures along the flow direction and observed both positive and negative wall temperature differences between the bottom and top tube. The findings were explained by the thermal conduction in the solid wall interacting with the stratified-wavy flow in the tube.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)