Article
Green & Sustainable Science & Technology
Hafiz Aman Zaharil
Summary: The study compared the performance of different supercritical fluids in a parabolic trough solar collector, with water showing the best energetic performance and sSF(6) performing weaker than the rest. All fluids showed optimal exergetic efficiency at 750K inlet temperature, with H2O being the best for thermal storage at 650K.
Article
Thermodynamics
Rohit Goyal, K. S. Reddy
Summary: Parabolic trough collector is a widely used and efficient technology for generating solar thermal power. The use of supercritical CO2 as a heat transfer fluid shows great potential for improving its efficiency. A numerical thermal model and optical analysis were used to analyze the entropy generated by s-CO2 in a parabolic trough collector and determine the optimal operating conditions.
APPLIED THERMAL ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Mostafa Gharzi, Ali M. Kermani, Hosseinali Tash Shamsabadi
Summary: A parabolic trough collector-thermoelectric generator (PTC-TEG) hybrid solar system was proposed and experimentally investigated. The results showed that increasing the HTF pressure improved the thermal efficiency by 6.88% and 14.64% compared to the conventional PTC. The electrical power generated by the TEG module contributed 0.96-1.11% to the total efficiency increase. Overall, the proposed hybrid solar system achieved a 15.75% enhancement in total efficiency.
Article
Green & Sustainable Science & Technology
Ibrahim Halil Yilmaz, Aggrey Mwesigye, Fatih Kilic
Summary: Parabolic trough solar collectors (PTSCs) are widely used in various fields, and the selection of heat transfer fluid (HTF) is crucial for their design and performance. This study proposes an integrated decision-making approach using AHP-VIKOR and CFD to prioritize HTFs in PTSC applications, and the results suggest that water and molten salt (Hitec) should be given priority in current systems.
Article
Thermodynamics
Lizhuang Dou, Bin Ding, Qiang Zhang, Guiyue Kou, Mingfei Mu
Summary: In this paper, the effects of the same nanoparticles with two different base fluids on the thermal performance of the collector are numerically investigated. The results show that synthetic oil/Cu nanofluids can increase the convective heat transfer coefficient and decrease the cross-sectional temperature difference of the absorber tube. Furthermore, it is found that Cu nanoparticles can trigger thermal and exergetic efficiency increment.
APPLIED THERMAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Khaled Mohamad, P. Ferrer
Summary: This study discusses an improved concept for a cavity receiver unit for Solar Parabolic Trough Collectors with the application of hot mirror coating to reduce radiant energy losses and increase efficiency. By comparing experimental and simulation results, it was found that this design has advantages in terms of heat transfer fluid temperature and efficiency at high temperatures.
Article
Green & Sustainable Science & Technology
Mojtaba Bezaatpour, Hadi Rostamzadeh, Javad Bezaatpour
Summary: A new hybrid method using a rotary absorber tube and magnetic field inducer with nanofluid can improve the performance of parabolic trough solar collectors. Results show that there is an optimal rotational speed and magnetic field intensity for maximizing energetic and exergetic efficiencies of the system.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Thermodynamics
Usman Allauddin, Muhammad U. Rafique, Osama Malik, Osama Rashid, Ashir Waseem, Peter King, Mounia Karim, Heather Almond
Summary: This study aims to improve the thermal performance of parabolic trough collectors (PTC) by modifying the geometry of the absorber tube and using a heat transfer fluid. Computational Fluid Dynamics (CFD) was employed for system design and development. The results showed that inclined rib turbulators can significantly enhance the thermo-hydraulic performance of PTC.
APPLIED THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
Shaik Khadhar Basha, Aruna Kumar Behura
Summary: Parabolic trough solar collectors (PTSCs) are versatile and reliable in achieving higher temperatures, making them suitable for industrial and domestic applications. This study compared the performance of two receiver configurations, evacuated tube and simple copper tube with a glass cover, and evaluated the influence of different blends of water and thermal oils as the heat transfer fluid (HTF). The results showed that the evacuated tube configuration with both HTFs had the best overall system efficiency of 55.4%. Comparing the different HTFs, Hytherm 600 exhibited a 32% higher efficiency than Therminol 55 in the evacuated tube configuration. The system achieved its highest efficiency during noon when the solar incidence angle was close to zero, reaching an optical efficiency of 71.6%.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2023)
Article
Energy & Fuels
Fares Ben Othman, Fathia Eddhibi, Abdessalem Bel Hadj Ali, Abdelhamid Fadhel, Ozgur Bayer, Ilker Tari, Amenallah Guizani, Moncef Balghouthi
Summary: The indirect solar dryer developed in this study utilizes a solar parabolic trough collector to treat olive mill sludge. The hot air dryer achieves high temperature and homogeneous treatment of the sludge, reducing drying time and CO2 emissions.
Article
Thermodynamics
Antonio Sanda, Sara L. Moya, Loreto Valenzuela, Roger Cundapi
Summary: The study presents a method involving a 3D HCE - 1D HTF model to accurately calculate the thermal distribution of the receiver, with lower computational cost and sufficient accuracy.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Tukaram U. Shinde, Vishwanath H. Dalvi, Ramchandra G. Patil, Channamallikarjun S. Mathpati, Sudhir V. Panse, Jyeshtharaj B. Joshi
Summary: This study proposes a novel design for a parabolic trough receiver, addressing the issues of high cost and maintenance associated with traditional receivers. Experimental validation and numerical simulations are used to compare the thermal performance and cost of the novel receiver with commercial receivers.
Article
Green & Sustainable Science & Technology
Paloma Martinez-Merino, Rodrigo Alcantara, Pedro Gomez-Larran, Ivan Carrillo-Berdugo, Javier Navas
Summary: Concentrating solar power, as an alternative to conventional polluting energy sources, is being studied extensively. This study proposes the use of nanofluids based on spherical molybdenum disulphide nanoparticles as the heat transfer fluid in parabolic trough solar collectors (PTCs) to improve the thermal efficiency of concentrating solar power plants. Experimental results show that the nanofluids significantly enhance the thermal efficiency and bring additional advantages such as reduced pumping power and elimination of selective coatings on absorber tubes.
Article
Energy & Fuels
Mukundjee Pandey, Biranchi Narayana Padhi, Ipsita Mishra
Summary: This study investigates the thermal improvement of solar parabolic trough collector by inserting an arc-plug within the absorber tube. It is found that under different operating conditions, the arc-plug with factor R values of 1 and 1.6060 can achieve optimal thermal efficiency and heat transfer performance, respectively.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2021)
Article
Green & Sustainable Science & Technology
Amir Mohammad Norouzi, Majid Siavashi, Rouhollah Ahmadi, Milad Tahmasbi
Summary: The study shows that in parabolic trough solar collectors, selecting the appropriate rotational speed of the absorber tube can significantly reduce temperature differences and maximum surface temperature, while increasing efficiency by approximately 17%. The Ta/Re ratio and CEP play crucial roles in predicting the optimal efficiency.
Article
Chemistry, Multidisciplinary
Jin Huan Pu, Jie Sun, Wen Wang, Hua Sheng Wang
Article
Engineering, Chemical
Yinsheng Yu, Yubing Tao, Jie Sun, Ya-Ling He
Article
Engineering, Chemical
Muhammad Adnan, Jie Sun, Nouman Ahmad, Jin Jia Wei
Article
Engineering, Chemical
Muhammad Adnan, Jie Sun, Nouman Ahmad, Jin Jia Wei
Summary: This study systematically investigated the verification and validation of the DDPM approach for different gas-solid fluidization regimes, including bubbling, turbulent, and circulating fluidized beds. The results showed that the sub-grid correction based on the EMMS approach is essential for accurately accounting for the effects of dissipative structures in all three fluidization regimes.
Article
Chemistry, Multidisciplinary
Jin Huan Pu, Si Kun Wang, Jie Sun, Wen Wang, Hua Sheng Wang
Summary: Molecular dynamics simulations were used to study how to maintain and enhance pure evaporation on nanopillar surfaces. It was found that closer nanopillar spacing and larger diameter enhance evaporation but increase the likelihood of boiling, while shorter nanopillar height enhances evaporation and suppresses boiling. Additionally, maintaining a nanofilm thickness above a certain threshold is necessary to avoid the suppression effect on evaporation.
Article
Engineering, Chemical
Muhammad Adnan, Jie Sun, Nouman Ahmad, Jin Jia Wei
Summary: The study compared the performance of Eulerian-Eulerian and Eulerian-Lagrangian numerical approaches in describing the hydrodynamic behavior of a pilot-scale bubbling bed reactor. The sub-grid drag correction based on the energy minimization and multiscale theory was found to be the key modeling parameter for both models. Both models predicted similar hydrodynamics behavior, with TFM achieving better accuracy in terms of axial and radial solids concentration profiles. The grid size analysis showed that DDPM generated a better grid-independent solution than TFM, making it a suitable candidate for large-scale industrial applications on coarser grids. Other parameters like time-step, time-averaging interval, specularity coefficient, restitution coefficient, reflection coefficient, and numbers of parcels had minor effects on the overall hydrodynamics behavior of the reactor.
Article
Thermodynamics
Li Wang, Jie Sun, Zhi Zhang, Jin Jia Wei
Summary: A trans-dimensional multi-physics coupled analysis method is proposed to predict the global performance and accurately quantify the local deformation of the heat collection element in concentrated solar power plants. Different worst scenarios are identified in different sections of the loop, highlighting the importance of considering practical installation errors and the interaction between HCE and concentrator.
APPLIED THERMAL ENGINEERING
(2021)
Article
Engineering, Chemical
Muhammad Adnan, Jie Sun, Nouman Ahmad, Jin Jia Wei
Summary: The study evaluates the hydrodynamics behavior of a 3D small-scale cold flow modeling of a gas-solid tapered fluidized bed using the Eulerian-Eulerian two-fluid modeling approach. The results show that the gas-particle drag force is crucial for resolving the correct time-averaged axial and radial solids holdup profiles, with the Gibilaro drag model offering the highest accuracy. Adjusting the particle-wall specularity coefficient and particle-particle restitution coefficient parameters can help achieve better agreement between experimental data and model results.
Article
Thermodynamics
Zhen Wen Zhang, Jie Sun, Rui Lin Wang, Jin Jia Wei
Summary: The study proposes a generalized model and unified expression for the ISCC system, revealing the effects of allocation and superposition on performance, ultimately providing theoretical guidance for future applications.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Qili Xu, Jie Sun, Zehua Ma, Rui Xie, Jinjia Wei
Summary: This study comprehensively investigates the influences of variable porosity on the thermochemical energy storage characteristics in DHR/IHR. It is found that the variable porosity has dual competitive impacts on the reaction rate and temperature field, and the constant porosity assumption may lead to overestimation or underestimation of the performance.
APPLIED THERMAL ENGINEERING
(2022)
Article
Chemistry, Physical
Jin Huan Pu, Si Kun Wang, Jie Sun, Wen Wang, Hua Sheng Wang
Summary: The molecular dynamics simulation demonstrates that nanodroplets can self-jump off the nanostructured surface driven by Laplace pressure difference. The characteristics of the hydrophilic pinning site have competitive effects on the growth and jumping dynamics of nanodroplets. Increasing the size and wettability of the pinning site promotes droplet growth but blocks droplet self-jumping.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Thermodynamics
Zhen Wen Zhang, Jie Sun, Dong Hui Li, Ma Rong, Jin Jia Wei
Summary: In this study, a novel modular photo-thermo-reactor (MPTR) is proposed for efficient and cost-effective hydrogen production from methanol steam reforming. The MPTR utilizes synergistic photo-thermo-catalysis (PTC) with Pt/CuO catalyst and thermo-catalysis (TC) with Cu/ZnO/Al2O3 catalyst in a cascade way using composite catalyst beds. A multiphysics model is established to optimally design the MPTR, covering optical, flow, thermal, and chemical sub-processes. The predicted performance indicates that the MPTR achieves the highest overall solar-to-hydrogen efficiency of 24.1% and annual hydrogen production of 1211 Nm(3)/m(2) in Xi'an, China.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Chemistry, Applied
Donghui Li, Jie Sun, Rong Ma, Jinjia Wei
Summary: This study proposes a novel technique using full-spectrum photo-thermo-catalysis for high-efficiency H2 production. The synergistic effect of intrinsic photon and thermal effects from full-spectrum sunlight is explored, resulting in improved H2 production performance. The Pt-CuOx photo-thermo-catalyst with Pt-Cu/Cu2O/CuO heterojunctions demonstrates both photoelectronic and photothermal conversion capabilities. The optimized reaction kinetics, including intensified intermediate adsorption and accelerated carrier transfer, contribute to the enhanced performance of solar-driven methanol steam reforming.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Chemistry, Physical
Rong Ma, Hui Su, Jie Sun, Donghui Li, Zhenwen Zhang, Jinjia Wei
Summary: The concentrated photo-thermo-catalysis (CPTC) technology enables full-spectrum solar harmonic conversion of urea-rich wastewater into hydrogen by regulating the spectral energy quantity and quality. This is achieved through catalyst structure optimization and expanded reaction pathways, resulting in a 50% enhanced performance compared to traditional photo-/thermo-catalysis.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Thermodynamics
Liming Wang, Yonggang Lei, Baocun Du, Yinshi Li, Jie Sun
Summary: This study proposes the use of elliptical fins to improve the thermal storage performance of a horizontal double tube latent thermal energy storage unit (HDT-LTESU). The addition of elliptical fins effectively improves convection heat transfer of the PCM, especially at the top and bottom of the annulus. High aspect ratio fins enhance the comprehensive performance of the system, with a maximum enhancement ratio of 16.9% for melting and 13.8% for solidification. The entransy theory also verifies the mechanism of enhanced thermal energy storage.
APPLIED THERMAL ENGINEERING
(2023)
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)
