Article
Thermodynamics
Sagar Saren, Vivek Kumar Mishra, Kyaw Thu, Sourav Mitra
Summary: This study conducted a theoretical analysis and computational fluid dynamics (CFD) study to investigate LPJ-driven adsorption process. Important physical scales for each phase were derived and validated through order of magnitude arguments. The results suggest that using short cycle time to maintain near isothermal condition in practical PSA systems is justified.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Review
Energy & Fuels
Marcin Sowa, Karol Sztekler, Agata Mlonka-Medrala, Lukasz Mika
Summary: This paper presents current developments in the field of composite sorbents with silica gel matrix as promising materials for adsorption chillers. The synthesis methods and properties of these materials are comprehensively analyzed, providing a clear basis for further research.
Article
Energy & Fuels
Tomasz Bujok, Piotr Boruta, Lukasz Mika, Karol Sztekler
Summary: This study analyzes the impact of design and material selection of heat exchangers in adsorption chillers on heat and mass transfer. The paper suggests introducing a new evaluation index to address the limitations of current SCP and COP coefficients for comparative analysis.
Article
Thermodynamics
Zepeng Wang, Zhongxian Yuan, Zhongbao Liu, Yimo Liu, Maria Bernat
Summary: The study presents a thermodynamic model to analyze the effect of adsorption time on the performance efficiency of a solar adsorption refrigeration system. The results show that increasing the adsorption time improves cooling capacity but also prolongs cycle time and affects system dynamics.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
N. U. Qadir, Z. Y. Xu, Q. W. Pan, S. A. M. Said, R. B. Mansour, K. Akhtar
Summary: This study introduces a numerical scheme for performance modeling of a commercial-scale adsorption chiller with adaptive heat/mass recovery cycle times. The research predicts that the proposed model of the mass recovery cycle can significantly improve the performance of the adsorption chiller compared to traditional cycle times.
APPLIED THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Tommaso Toppi, Tommaso Villa, Salvatore Vasta, Walter Mittelbach, Angelo Freni
Summary: This work investigates the performance of an innovative evaporator featuring a water falling film. The evaporator is equipped with a recirculation system to maximize the wetted surface area. Experimental tests were conducted on a lab-scale adsorption unit connected to a test bench at Politecnico di Milano labs. The results show that the heat duty peaks are mainly influenced by the thermal level of the chilled water entering the evaporator, while the overall evaporator heat transfer conductance (UA) is not affected by the inlet chilled water temperature and initial mass content inside the evaporator.
Article
Thermodynamics
Makram Mikhaeil, Matthias Gaderer, Belal Dawoud
Summary: This study investigates the influence of heat and mass transfer characteristic lengths on the adsorption and desorption kinetics of two different adsorber plate heat exchangers for use in an adsorption chiller. Experimental tests were conducted using microporous silica gel and an analytical model was developed to predict the performance of a single-bed adsorption chiller. The results show that the adsorption kinetics are affected by the mass transfer characteristic length while the desorption kinetics are influenced by the heat transfer characteristic length. Moreover, the use of Siogel as loose pellets in the adsorber plate heat exchanger shows promising results in terms of specific cooling power and coefficient of performance.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Marc Scherle, Julian Liedtke, Ulrich Nieken
Summary: The paper introduces a highly efficient adsorption chiller by optimizing the adsorbent layer thickness, process cycle time, and heat regeneration for maximum thermal efficiency. Through combined optimization, a Coefficient of Performance of up to 1.57 could be reached.
APPLIED THERMAL ENGINEERING
(2022)
Article
Energy & Fuels
Q. W. Pan, L. Liu, B. Wang, J. Xu, T. S. Ge
Summary: In this study, a detailed thermal design of a small-scale silica gel-water adsorption chiller is presented, and its performance under typical medium solar hot water temperature is tested. The results show that the adsorption chiller can operate stably and reliably with cooling power ranging from 2.2 to 3.6 kW at a hot water temperature of 70 degrees C. This study provides a better understanding of the thermal design and performance of the adsorption chiller under medium solar hot water temperature.
Article
Thermodynamics
Shanshan Cai, Zhipeng Hua, Min Dai, Song Li, Xiaobing Luo, Zhengkai Tu
Summary: This study proposes three types of improved composite adsorbents, namely adsorbents with improved heat transfer, improved mass transfer, and simultaneously improved heat and mass transfer. The performance of adsorption and heat transfer is tested and compared, and the SGMC composite shows the highest cooling capacity and comparable coefficient of performance (COP) to the composite adsorbent with improved mass transfer. Compared to the traditional SG-water system, the SGMC system achieves a 22% increase in cooling capacity, a 12.8% increase in COP, and a 16.7% reduction in refrigeration cycle time.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Andrej Gibelhaus, Patrik Postweiler, Andre Bardow
Summary: This study proposes an alternative modeling approach to improve the computational efficiency of adsorption chillers by applying operator splitting. The accuracy and applicability of the proposed model are validated through experimental data.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2022)
Article
Polymer Science
Tien Duc Pham, Viet Phuong Bui, Thuy Nga Pham, Thi Mai Dung Le, Kim Thuy Nguyen, Van Hoi Bui, The Dung Nguyen
Summary: This study demonstrated the effective adsorption of anionic azo dye NCC on PDADMAC modified silica and silica-gel in an aquatic environment. The removal efficiencies of NCC using PMS and PMSG were higher than 87%, indicating their potential as novel and reusable adsorbents for anionic dye removal. The electrostatic interaction between positively charged adsorbents' surfaces and negative sulfonic groups of NCC was identified as the main driving force for anionic azo dye adsorption onto PMS and PMGS adsorbents through analysis of adsorption isotherms and surface group changes.
Article
Thermodynamics
M. M. Tokarev, I. S. Girnik, Yu. I. Aristov
Summary: This study tested a HeCol prototype under different climate conditions and found that higher specific power can be achieved in colder climates, reaching practical temperatures under closed-loop conditions.
Article
Thermodynamics
Gaurav Priyadarshi, Dipankar Baruah, B. Kiran Naik
Summary: In order to improve indoor air quality, accurately predicting and optimizing the design and performance characteristics of desiccant coated heat exchangers is crucial. This study utilizes an adaptive neuro-fuzzy inference system to investigate the exit parameters of desiccant coated heat exchangers, as well as factors such as adsorption kinetics and thermal effects.
APPLIED THERMAL ENGINEERING
(2022)
Article
Energy & Fuels
Ahmed Rezk, Abdul Ghani Olabi, Abdul Hai Alami, Ali Radwan, Hasan Demir, Shek Mohammod Atiqure Rahman, Sheikh Khaleduzzaman Shah, Mohammad Ali Abdelkareem
Summary: This paper investigates the feasibility of utilizing ethanol as a working fluid paired with silica gel for adsorption heat storage under sub-zero ambient conditions. The results show that silica gel/ethanol has better cyclic performance and energy conversion performance compared to silica gel/water, but the physical characteristics of ethanol molecules limit its storage potential.
Article
Thermodynamics
Alessio Sapienza, Vincenza Brancato, Yuri Aristov, Salvatore Vasta
Summary: In this study, plastic adsorbent heat exchangers were developed using 3D printing technology and experimentally tested for adsorption cooling applications. Results showed that the plastic adsorbers are competitive with metallic ones in terms of both thermodynamic and dynamic performance, with significant mass reduction and the ability to manufacture complex geometries. Under the tested operating conditions, the plastic adsorbers delivered a specific cooling power of 1.88-2.40 kW per kg of dry sorbent, while metallic adsorbers reached 2.34 kW/kg.
APPLIED THERMAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Marina Solovyeva, Alexandr Shkatulov, Larisa G. Gordeeva, Elizaveta A. Fedorova, Tamara A. Krieger, Yuri Aristov
Summary: Metal-organic frameworks (MOFs) with unique flexibility in structure and properties are widely used in water adsorption. This study investigates the influence of functional groups on water adsorption in MOFs and elucidates the primary adsorption sites and mechanisms through a combination of physicochemical methods.
Review
Chemistry, Physical
Larisa G. Gordeeva, Yao Dong Tu, Quanwen Pan, M. L. Palash, Bidyut B. Saha, Yuri I. Aristov, Ru Zhu Wang
Summary: Adsorption technologies for Heat Conversion (AHC) and Water Harvesting (AWH) have great potential for energy management, but challenges such as low hydrothermal stability of MOFs need to be addressed through interdisciplinary research between Applied Thermal Engineering (ATE) and Materials Science (MS) and close collaboration.
Article
Chemistry, Physical
Taisen Yan, Tingxian Li, Jiaxing Xu, Jingwei Chao, Ruzhu Wang, Yuri Aristov, Larisa G. Gordeeva, Pradip Dutta, S. Srinivasa Murthy
Summary: This paper introduces an ultrahigh-energy/power-density sorption thermal battery enabled by graphene aerogel-based composite sorbents for efficient thermal harvesting and storage. The STB achieves record energy density and power density for space heating through the multistep water desorption-sorption mechanism of CaCl2@GA sorbent. Overall, this work provides a promising low-carbon route for efficient thermal energy harvesting, storage, and utilization.
ACS ENERGY LETTERS
(2021)
Article
Thermodynamics
I. S. Girnik, Yu. I. Aristov
Summary: This study examines the dynamic effect of residual air on pressure-initiated and temperature-initiated adsorption heat transformation cycles, finding that the pressure-initiated adsorption is less sensitive to the presence of residual air, especially at low partial air pressure. This suggests that closed adsorption heat transformation cycles based on the pressure-initiated process are more robust and resistant against residual air, potentially offering a significant practical advantage.
APPLIED THERMAL ENGINEERING
(2022)
Editorial Material
Energy & Fuels
Larisa G. Gordeeva, Yuri I. Aristov
Article
Thermodynamics
Yu. I. Aristov
Summary: This review article addresses recent results and current trends in adsorption heat conversion/storage in closed systems. It focuses on the development of new adsorbents and cycles, improvement of adsorption dynamics, and other topical issues, aiming to highlight the current progress, research trends, and existing gaps in the technology involved.
Article
Thermodynamics
M. M. Tokarev, I. S. Girnik, Yu. I. Aristov
Summary: This study tested a HeCol prototype under different climate conditions and found that higher specific power can be achieved in colder climates, reaching practical temperatures under closed-loop conditions.
Article
Thermodynamics
Yu Aristov, L. G. Gordeeva
Summary: Adsorption processes are commonly used to convert low- or ultralow-temperature heat into usable energy, with specific applications such as the VentireG process for ULT heat regeneration. A new approach for deeper analysis of this process involves plotting water adsorption isosters directly on psychrometric charts. This method allows for simultaneous tracking of air and adsorbent states, enabling a conscious selection of appropriate adsorbents for specific climatic zones.
Article
Thermodynamics
I. S. Girnik, W. Lombardo, A. Sapienza, Yu. I. Aristov
Summary: Adsorption heat transformation is an effective and environmentally friendly method that utilizes low-temperature heat. This study investigates the dynamics of water adsorption in relation to the initiation pathway and suggests that the specific power of adsorption heat transformers can be improved by optimizing the working cycle.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Energy & Fuels
Alexandr Shkatulov, Haruka Miura, Seon Tae Kim, Massimiliano Zamengo, Takuya Harada, Hiroki Takasu, Yukitaka Kato, Yuri Aristov
Summary: This study investigates the modification of MgO with the triple eutectic mixture LiNO3-NaNO3-KNO3 in order to improve its decarbonation performance. The composites were comprehensively characterized and tested for their sorption properties. The results show that the material has high conversion rate, CO2 uptake, and excellent heat storage capacity at high temperatures.
JOURNAL OF ENERGY STORAGE
(2022)
Review
Energy & Fuels
Larisa Gordeeva, Yuri Aristov
Summary: Adsorptive heat transformation (AHT) is a technology that effectively utilizes low-grade solar or waste thermal energy for cooling and heating with low environmental impact. The power of AHT is mainly determined by ad/desorption dynamics, which is hindered by slow heat transfer between the adsorbent and heat exchanger. Coating the adsorbent bed on the heat exchanger surface is considered an effective way to enhance heat transfer and increase the AHT power. This review comprehensively surveys the technology of adsorbent coating for AHT, including synthesis, dynamics, and applications.
Article
Thermodynamics
Svetlana Strelova, Larisa G. Gordeeva, Alexandra D. Grekova, Aleksei N. Salanov, Yuri I. Aristov
Summary: This study aims to accelerate methanol desorption from a composite LiCl/vermiculite and improve the heat storage capacity of adsorption thermal batteries. By modifying the vermiculite with an aluminum-oxygen containing additive, the methanol desorption time is reduced by a factor of 2-12, resulting in a fourfold increase in the specific power of the heat storage stage. This research has important implications for accelerating the sorption of various substances on composites based on macroporous matrices.
Article
Chemistry, Physical
Yu. I. Aristov
Summary: Adsorptive heat transformation is a promising technology for heat storage, conversion, and cold generation. Its development hinges on the advancement of adsorbents, efficient cycle implementation, and alignment of adsorbent-cycles. This article investigates the utilization of adsorption potential theory to achieve these goals and highlights the progress made in adsorptive heat transformation.
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
(2023)
Article
Thermodynamics
S. V. Strelova, Yu. I. Aristov, L. G. Gordeeva
Summary: Adsorption Heat Conversion (AHC) is an energy-saving and environmentally friendly alternative to conventional compression systems. The use of innovative adsorbent bed configurations, such as gluing ready-made grains to the heat exchanger surface, can enhance the power of AHC systems. Inorganic binders are found to increase the effective heat transfer coefficient, while organic binders have no effect on heat transfer. The findings provide insights into the factors controlling adsorption kinetics and offer recommendations for designing innovative bed configurations.
Article
Thermodynamics
Yong Cheng, Fukai Song, Lei Fu, Saishuai Dai, Zhiming Yuan, Atilla Incecik
Summary: This paper investigates the accessibility of wave energy absorption by a dual-pontoon floating breakwater integrated with hybrid-type wave energy converters (WECs) and proposes a hydraulic-pneumatic complementary energy extraction method. The performance of the system is validated through experiments and comparative analysis.
Article
Thermodynamics
Jing Gao, Chao Wang, Zhanwu Wang, Jin Lin, Runkai Zhang, Xin Wu, Guangyin Xu, Zhenfeng Wang
Summary: This study aims to establish a new integrated method for biomass cogeneration project site selection, with a focus on the application of the model in Henan Province. By integrating Geographic Information System and Multiple Criterion Decision Making methods, the study conducts site selection in two stages, providing a theoretical reference for the construction of biomass cogeneration projects.
Article
Thermodynamics
Mert Temiz, Ibrahim Dincer
Summary: The current study presents a hybrid small modular nuclear reactor and solar-based system for sustainable communities, integrating floating and bifacial photovoltaic arrays with a small modular reactor. The system efficiently generates power, hydrogen, ammonia, freshwater, and heat for residential, agricultural, and aquaculture facilities. Thermodynamic analysis shows high energy and exergy efficiencies, as well as large-scale ammonia production meeting the needs of metropolitan areas. The hybridization of nuclear and solar technologies offers advantages of reliability, environmental friendliness, and cost efficiency compared to renewable-alone and fossil-based systems.
Editorial Material
Thermodynamics
Wojciech Stanek, Wojciech Adamczyk
Article
Thermodynamics
Desheng Xu, Yanfeng Li, Tianmei Du, Hua Zhong, Youbo Huang, Lei Li, Xiangling Duanmu
Summary: This study investigates the optimization of hybrid mechanical-natural ventilation for smoke control in complex metro stations. The results show that atrium fires are more significantly impacted by outdoor temperature variations compared to concourse/platform fires. The gathered high-temperature smoke inside the atrium can reach up to 900 K under a 5 MW train fire energy release. The findings provide crucial engineering insights into integrating weather data and adaptable ventilation protocols for smoke prevention/mitigation.
Article
Thermodynamics
Da Guo, Heping Xie, Mingzhong Gao, Jianan Li, Zhiqiang He, Ling Chen, Cong Li, Le Zhao, Dingming Wang, Yiwei Zhang, Xin Fang, Guikang Liu, Zhongya Zhou, Lin Dai
Summary: This study proposes a new in-situ pressure-preserved coring tool and elaborates its pressure-preserving mechanism. The experimental and field test results demonstrate that this tool has a high pressure-preservation capability and can maintain a stable pressure in deep wells. This study provides a theoretical framework and design standards for the development of similar technologies.
Article
Thermodynamics
Aolin Lai, Qunwei Wang
Summary: This study assesses the impact of China's de-capacity policy on renewable energy development efficiency (REDE) using the Global-MSBM model and the difference-in-differences method. The findings indicate that the policy significantly enhances REDE, promoting technological advancements and marketization. Moreover, regions with stricter environmental regulations experience a higher impact.
Article
Thermodynamics
Mostafa Ghasemi, Hegazy Rezk
Summary: This study utilizes fuzzy modeling and optimization to enhance the performance of microbial fuel cells (MFCs). By simulating and analyzing experimental data sets, the ideal parameter values for increasing power density, COD elimination, and coulombic efficiency were determined. The results demonstrate that the fuzzy model and optimization methods can significantly improve the performance of MFCs.
Article
Thermodynamics
Zhang Ruan, Lianzhong Huang, Kai Wang, Ranqi Ma, Zhongyi Wang, Rui Zhang, Haoyang Zhao, Cong Wang
Summary: This paper proposes a grey box model for fuel consumption prediction of wing-diesel hybrid vessels based on feature construction. By using both parallel and series grey box modeling methods and six machine learning algorithms, twelve combinations of prediction models are established. A feature construction method based on the aerodynamic performance of the wing and the energy relationship of the hybrid system is introduced. The best combination is obtained by considering the root mean square error, and it shows improved accuracy compared to the white box model. The proposed grey box model can accurately predict the daily fuel consumption of wing-diesel hybrid vessels, contributing to operational optimization and the greenization and decarbonization of the shipping industry.
Article
Thermodynamics
Huayi Chang, Nico Heerink, Junbiao Zhang, Ke He
Summary: This study examines the interaction between off-farm employment decisions between couples and household clean energy consumption in rural China, and finds that two-paycheck households are more likely to consume clean energy. The off-farm employment of women is a key factor driving household clean energy consumption to a higher level, with wage-employed wives having a stronger influence on these decisions than self-employed ones.
Article
Thermodynamics
Hanguan Wen, Xiufeng Liu, Ming Yang, Bo Lei, Xu Cheng, Zhe Chen
Summary: Demand-side management is crucial to smart energy systems. This paper proposes a data-driven approach to understand the relationship between energy consumption patterns and household characteristics for better DSM services. The proposed method uses a clustering algorithm to generate optimal customer groups for DSM and a deep learning model for training. The model can predict the possibility of DSM membership for a given household. The results demonstrate the usefulness of weekly energy consumption data and household socio-demographic information for distinguishing consumer groups and the potential for targeted DSM strategies.
Article
Thermodynamics
Xinglan Hou, Xiuping Zhong, Shuaishuai Nie, Yafei Wang, Guigang Tu, Yingrui Ma, Kunyan Liu, Chen Chen
Summary: This study explores the feasibility of utilizing a multi-level horizontal branch well heat recovery system in the Qiabuqia geothermal field. The research systematically investigates the effects of various engineering parameters on production temperature, establishes mathematical models to describe their relationships, and evaluates the economic viability of the system. The findings demonstrate the significant economic feasibility of the multi-level branch well system.
Article
Thermodynamics
Longxin Zhang, Songtao Wang, Site Hu
Summary: This investigation reveals the influence of tip leakage flow on the modern transonic rotor and finds that the increase of tip clearance size leads to a decline in rotor performance. However, an optimal tip clearance size can extend the rotor's stall margin.
Article
Thermodynamics
Kristian Gjoka, Behzad Rismanchi, Robert H. Crawford
Summary: This paper proposes a framework for assessing the performance of 5GDHC systems and demonstrates it through a case study in a university campus in Melbourne, Australia. The results show that 5GDHC systems are a cost-effective and environmentally viable solution in mild climates, and their successful implementation in Australia can create new market opportunities and potential adoption in other countries with similar climatic conditions.
Article
Thermodynamics
Jianwei Li, Guotai Wang, Panpan Yang, Yongshuang Wen, Leian Zhang, Rujun Song, Chengwei Hou
Summary: This study proposes an orientation-adaptive electromagnetic energy harvester by introducing a rotatable bluff body, which allows for self-regulation to cater for changing wind flow direction. Experimental results show that the output power of the energy harvester can be greatly enhanced with increased rotatory inertia of the rotating bluff body, providing a promising solution for harnessing wind-induced vibration energy.