Article
Green & Sustainable Science & Technology
Hegazy Rezk, Ramy H. Mohammed, Emanne Rashad, Ahmed M. Nassef
Summary: This study aims to optimize the operating conditions of an adsorption cooling cycle using artificial intelligence. By creating an accurate ANFIS model, it is demonstrated that fuzzy modeling can more accurately predict the performance of the cooling cycle compared to ANOVA modeling.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Engineering, Multidisciplinary
Mahmoud B. Elsheniti, A. T. Abd El-Hamid, O. A. El-Samni, S. M. Elsherbiny, E. Elsayed
Summary: A lab-scale two-bed adsorption chiller driven by solar energy was designed, constructed, and experimentally evaluated, achieving a specific cooling capacity of about 75 W/kg and a coefficient of performance of 0.42 under specific operating conditions. Effects of adsorption/desorption times and chilled water temperatures on the chiller performance were investigated.
ALEXANDRIA ENGINEERING JOURNAL
(2021)
Article
Green & Sustainable Science & Technology
Ehab S. Ali, Ramy H. Mohammed, Ahmed Askalany
Summary: An integration between ADS and a liquid-vapor ejector has been proposed to increase freshwater productivity significantly. Internal heat recovery in the ADEJ cycle enhances system performance. ADEJ with heat recovery produces freshwater at a rate 5.0 times higher than ADS, and achieves a COP 2.7 times higher than ADS.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Thermodynamics
Mohamed Ghazy, Ahmed Askalany, Ali Kamel, Kamal M. S. Khalil, Ramy H. Mohammed, Bidyut Baran Saha
Summary: The study modified Maxsorb III activated carbon and experimentally measured its adsorption isotherms and kinetics towards HFC404A, as well as calculated the isosteric heat of adsorption. The experimental results show that the modified Maxsorb III has a maximum uptake of 2.65 kg.kg(-1) of HFC404A at 25 degrees C.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2021)
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
Green & Sustainable Science & Technology
Ehab S. Ali, Hafiz Muhammad Asfahan, Muhammad Sultan, Ahmed A. Askalany
Summary: This study aims to address the issue of adsorption desalination cum cooling system unable to operate below 70 degrees C. By proposing new configurations, the system was successfully operated at temperatures below 70 degrees C, achieving promising performance indicators.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Thermodynamics
Mahmoud Badawy Elsheniti, Ahmed Rezk, Mohamed Shaaban, Mohamed Roshdy, Yahia Mohamed Nagib, Osama A. Elsamni, Bidyut Baran Saha
Summary: This paper numerically investigated how the thermal and adsorption characteristics of adsorbent materials affect the overall performance of solar adsorption cooling cum desalination systems. The study found that while the Aluminum Fumarate metal-organic framework outperformed conventional silica gel in adsorption characteristics, its lower thermal characteristics limited the performance of the integrated system.
APPLIED THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Karol Sztekler, Wojciech Kalawa, Lukasz Mika, Lukasz Lis, Ewelina Radomska, Wojciech Nowak
Summary: Adsorption chillers are a promising alternative to traditional compressor-based devices that can utilize low- or medium-temperature waste heat or heat from renewable energy sources, and can be used for water desalination. This study experimentally investigated the influence of steam utilization on the operation of an adsorption chiller, finding that preheating with steam leads to higher temperatures in the heat exchanger and the bed, resulting in more intense heat transfer and a significant reduction in desorption time, ultimately increasing efficiency and reducing device size.
Article
Thermodynamics
Y. M. Liu, Z. X. Yuan, X. Wen, C. X. Du
Summary: This study evaluated the performance of a solar adsorption cooling system using a silica gel-water working pair, finding optimal performance at an adsorption time of 45 minutes. Comparison with a SAPO-34 zeolite-water system showed that the silica gel system outperformed at the optimal adsorption time.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Mahbubul Muttakin, Md Amirul Islam, Kuldeep Singh Malik, Deepak Pahwa, Bidyut Baran Saha
Summary: In this study, a commercial two-bed adsorption chiller using silica gel and water as adsorbent and adsorbate is simulated and validated through MATLAB platform. The performance of the chiller under various working conditions and the impacts of different parameters on the cooling capacity and COP are analyzed. Optimum operating parameters are reported for different temperatures to achieve maximum efficiency.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2021)
Article
Thermodynamics
Qiangqiang Xu, Jianghong Wu, Zhe Xu
Summary: The research reveals the composite theory of silica gel composite adsorbent and explores its advantages in adsorption refrigeration systems. Experimental results show that the composite adsorbent with added calcium chloride exhibits higher thermal conductivity and adsorption capacity. The use of the silica gel-calcium chloride composite adsorbent in adsorption refrigeration systems has achieved significant performance improvements.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2021)
Article
Environmental Sciences
Salma Gul, Mansha Kanwal, Raina Aman Qazi, Hajera Gul, Rozina Khattak, Muhammad Sufaid Khan, Fatima Khitab, Andrey E. Krauklis
Summary: This study demonstrates for the first time that biomass derived from the bark of the Dodonaea viscosa plant can effectively and sustainably remove methyl red dye. The bark shows promising adsorption capacity, especially under acidic conditions. The experimental results suggest that bark powder outperforms other adsorbents such as animal charcoal, silica gel, powdered flowers, and leaves of the same species.
Article
Thermodynamics
Rami Habash, Gamze Gediz Ilis, Hasan Demir, Hakan Fehmi Oztop
Summary: This study aimed to design a low-grade heat driven ethanol-silica gel adsorption chiller, with experimental and numerical analysis confirming the improved performance achieved by lowering the desorption temperature of the silica gel/ethanol pair. The specific cooling power and volumetric cooling power values were found to be 20.2 Wkg1 and 4.5 kWm 3, respectively.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2021)
Article
Energy & Fuels
Jose C. Alvarez, Leonardo Bravo, Roberto C. Marcal, Kazuo Hatakeyama, Enrique Barrantes
Summary: Tests of adsorption cooling prototypes using the silica gel-water pair with solar energy have been reported, but there is a lack of analysis, comparisons and integration of the data. This study compares thermodynamic results, determines characteristics, and analyzes technical contradictions for twelve identified adsorption refrigeration prototypes. The study reveals systematized results and characteristics, diverse construction forms, and non-standardized tests emphasizing various aspects in each prototype.
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
Hai Zhao, Puzhen Gao, Xiaochang Li, Ruifeng Tian, Hongyang Wei, Sichao Tan
Summary: This study numerically investigates the interaction between flow-induced vibration and forced convection heat transfer in a tube bundle. The results show that the impact of flow-induced vibration on heat transfer varies in different flow velocity regions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rohit Chintala, Jon Winkler, Sugirdhalakshmi Ramaraj, Xin Jin
Summary: The current state of fault detection and diagnosis for residential air-conditioning systems is expensive and not suitable for widespread implementation. This paper proposes a cost-effective solution by introducing an automated fault detection algorithm as a screening step before more expensive tests can be conducted. The algorithm uses home thermostats and local weather information to identify thermodynamic parameters and detect high-impact air-conditioning faults.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
A. Azimi, N. Basiri, M. Eslami
Summary: This paper presents a novel optimization algorithm for improving the water-film cooling system of photovoltaic panels, resulting in a significant increase in net energy generation.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Duc-Thuan Phung, Chin-Hsiang Cheng
Summary: In this study, a novel CFDMD model is used to analyze and investigate the behavior of thermal-lag engines (TLE). The study shows that the CFDMD model effectively captures the thermodynamic behavior of the working gas and the dynamic behavior of the engine mechanism. Additionally, the study explores the temporal evolution of engine speed and the influence of various parameters on shaft power and brake thermal efficiency. The research also reveals the existence of a thermal-lag phenomenon in TLE.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Haiying Yang, Yinjie Shen, Lin Li, Yichen Pan, Ping Yang
Summary: The purpose of this article is to find a measure to improve the interfacial thermal transfer of graphene/silicon heterojunction. Through molecular dynamics simulation, it is found that surface modification can significantly reduce the thermal resistance, thereby improving the thermal conductivity of the graphene/silicon interface.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Qiong Wu, Yancheng Wang, Haonan Zhou, Xingye Qiu, Deqing Mei
Summary: This article introduces a visible methanol steam reforming microreactor, which uses an optical crystal as an observation window and measures the reaction temperature in real-time using infrared thermography. The results show that under lower oxygen to carbon ratio conditions, the microreactor has a higher heating rate and a stable gradient in temperature distribution.
APPLIED THERMAL ENGINEERING
(2024)
Review
Thermodynamics
Giulia Manco, Umberto Tesio, Elisa Guelpa, Vittorio Verda
Summary: In the past decade, there has been a growing interest in studying energy systems for the combined management of power vectors. Most of the published works focus on finding the optimal design and operations of Multi Energy Systems (MES). However, for newcomers to this field, understanding how to achieve the desired optimization details while controlling computational expenses can be challenging and time-consuming. This paper presents a novel approach to analyzing the existing literature on MES, with the aim of guiding practical development of MES optimization. Through the discussion of six case studies, the authors provide a mathematical formulation as a reference for building the model and emphasize the impact of different aspects on the problem nature and solver selection. In addition, the paper also discusses the different approaches used in the literature for incorporating thermal networks and storage in the optimization of multi-energy systems.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xuepeng Yuan, Caiman Yan, Yunxian Huang, Yong Tang, Shiwei Zhang, Gong Chen
Summary: In this study, a multi-scale microgroove wick (MSMGW) was developed by laser irradiation, which demonstrated superior capillary performance. The surface morphology and performance of the wick were affected by laser scan pitch, laser power, repetition frequency, and scanning speed. The MSMGW showed optimal capillary performance in alumina material and DI water as the working fluid.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Maofei Mei, Feng Hu, Chong Han
Summary: This paper proposes an effective local search method based on detection of droplet boundaries for understanding the dynamic process of droplet growth during dropwise condensation. The method is validated by comparing with experimental data. The present simulation provides an effective approach to more accurately predict the nucleation site density in future studies.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rahul Kumar Sharma, Ashish Kumar, Dibakar Rakshit
Summary: The study explores the use of phase change materials (PCM) as a retrofit with Heating Ventilation and Air-conditioning systems (HVAC) to reduce energy consumption and improve air quality. By incorporating PCM with specific thickness and fin configurations, significant energy savings can be achieved in comparison to standard HVAC systems utilizing R134a. This research provides policymakers with energy-efficient and sustainable solutions for HVAC systems to combat climate change.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Zhenhua Ren, Xiangjin Meng, Xingang Qi, Hui Jin, Yunan Chen, Bin Chen, Liejin Guo
Summary: This paper investigates the heat transfer mechanism and factors influencing thermal radiation in the process of supercritical water gasification (SCWG) of coal, and proposes a comprehensive numerical model to simulate the process. Experimental validation results show that thermal radiation accounts for a significant proportion of the total heat exchange in the reactor and a large amount of radiant energy exists in the important spectral range of supercritical water. Enhancing radiative heat transfer can effectively increase the temperature of the reaction medium and the gasification rate.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Mauro Abela, Mauro Mameli, Sauro Filippeschi, Brent S. Taft
Summary: Pulsating Heat Pipes (PHP) are passive two-phase heat transfer devices with a simple structure and high heat transfer capabilities. The actual unpredictability of their dynamic behavior during startup and thermal crisis hinders their large-scale application. An experimental apparatus is designed to investigate these phenomena systematically. The results show that increasing the number of evaporator sections and condenser temperature improves the performance of PHP. The condenser temperature also affects the initial liquid phase distribution and startup time.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Ke Gan, Ruilian Li, Yi Zheng, Hui Xu, Ying Gao, Jiajie Qian, Ziming Wei, Bin Kong, Hong Zhang
Summary: A 3-dimensional enhanced heat pipe radiator has been developed to improve heat dissipation and temperature uniformity in cooling high-power electronic components. Experimental results show that the radiator has superior heat transfer performance compared to a conventional aluminum fin radiator under different heating powers and wind speed conditions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xinyi Zhang, Shuzhong Wang, Daihui Jiang, Zhiqiang Wu
Summary: This study focuses on recovering waste heat from blast furnace slag using dry centrifugal pelletizing technology. A comprehensive two-dimensional model was developed to analyze heat transfer dynamics and investigate factors influencing heat exchange efficiency. The findings have important implications for optimizing waste heat recovery and ensuring safe operations.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xincheng Wu, An Zou, Qiang Zhang, Zhaoguang Wang
Summary: The boosting heat generation rate of high-performance processors is challenging traditional cooling techniques. This study proposes a combined design of active jet intermittency and passive surface modification to enhance heat transfer.
APPLIED THERMAL ENGINEERING
(2024)