Review
Energy & Fuels
Cong Jiao, Zeyu Li
Summary: Solar cooling systems driven by photovoltaic-thermal (PVT) collectors have been widely studied to improve the thermodynamic and economic performance. This paper reviews recent research on the technological improvement of PVT collectors, the development of thermally driven cooling cycles, and the performance of solar cooling systems driven by PVT collectors. The study shows improved efficiencies of PVT collectors compared to conventional PV systems and PVT systems based on water cooling, as well as expanded temperature limits for the heat source and favorable economic feasibility.
Article
Thermodynamics
W. K. Alani, J. Zheng, M. A. Fayad, Lei Lei
Summary: This study investigates the use of solar energy in vehicle air conditioning systems to improve fuel economy and reduce harmful emissions. The results showed that the solar air conditioning system reduced fuel consumption by 25% compared to conventional systems, while effectively controlling temperatures inside the car and reducing emissions.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Deqiang He, Xiaoliang Teng, Yanjun Chen, Bin Liu, Jinxin Wu
Summary: This study proposes a general theoretical formula for piston wind ventilation systems and analyzes the energy-saving effects of metro station ventilation systems in multi-vehicle models using fresh air. The theoretical formula is verified to be applicable in various situations, and fresh air velocity is identified as a critical factor influencing energy savings. Energy savings in multi-vehicle models depend on train location, state, and number, highlighting the importance of fresh air velocity for energy efficiency in metro stations.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Environmental Sciences
Xueqing Liu, Song Yue, Xiaodong Zhao, Luyi Lu, Jianlan Li
Summary: Liquid bridge evaporation has a significant impact on dust agglomeration on PV panels, but it is only effective in the muddy state with small particle spacing, enhancing the agglomeration process.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Thermodynamics
Dikai Xu, Sebastien Boncoeur, Gang Tan, Jingtao Xu, Hua Qian, Dongliang Zhao
Summary: A new fresh air pre-cooling system using radiative sky cooling technique is proposed to reduce the cooling load of fresh air. Simulation results show an annual cooling energy consumption reduction of around 10% in most cities, with even better performance in arid areas like Abu Dhabi with a 19.34% energy saving.
BUILDING SIMULATION
(2022)
Article
Construction & Building Technology
Wenping Du, Ming Li, Yunfeng Wang, Xun Ma, Chengzhi Hu, Ying Zhang, Zhuoli Zhang
Summary: A novel method for constructing a distributed solar photovoltaic direct-drive cold storage system is proposed, where the key factors affecting system performance and energy efficiency are studied in detail. Experimental results show that the solar-cold energy conversion efficiency of the system is negatively correlated with solar radiation intensity and varies under different weather conditions.
BUILDING AND ENVIRONMENT
(2021)
Article
Thermodynamics
Mengxiao Huang, Yunfeng Wang, Ming Li, Vanhkeo Keovisar, Xuejuan Li, Decheng Kong, Qiongfen Yu
Summary: This paper compared the performance of solar photovoltaic/thermal air collectors based on amorphous silicon solar cells with traditional solar air collectors and individual photovoltaic modules. The experimental results show differences in thermal and electrical efficiency under various operating conditions. The study provides a reference for further applications of amorphous silicon solar cells integrated with SPVTAC.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Jibo Long, Kuiming Xia, Huihui Zhong, Haolin Lu, Yongga A
Summary: This study proposes a hybrid solar hot water and air source heat pump combined heating system, which optimizes energy efficiency through different connection modes. Simulation analysis of the system's energy efficiency in the cold season reveals that solar radiation intensity and ambient temperature are crucial factors affecting efficiency. By switching the connection mode of solar hot water and air source heat pump based on outdoor weather conditions, the system can achieve significant energy-saving benefits.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Green & Sustainable Science & Technology
Selman Cagman, Eren Soylu, Umit Unver
Summary: Compressed air systems have high energy transfer capacity but are inefficient, resulting in high energy consumption and CO2 emissions. Improving energy efficiency in these systems can reduce energy consumption and CO2 emissions, promoting cleaner production. This paper investigates the energy-saving potential and carbon emissions of Compressed Air Systems using in-situ energy audit data and proposes two new Energy Performance Indicators.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Agronomy
Qianwen Zhang, Maosheng Ge, Pute Wu, Fuqiang Wei, Shaopeng Xue, Bo Wang, Xinbo Ge
Summary: This study proposes an innovative solar-powered sprinkler irrigation system using compressed air energy storage, which can meet the energy demand characteristics of sprinkler irrigation systems. Results show that the system can carry out stable intermittent pulse spraying using solar energy as the sole energy source. By adjusting the spraying starting pressure and pulse spraying duration, the hydraulic performance of sprinkler irrigation can be regulated effectively. The study demonstrates that the dual goals of green energy saving and high-quality sprinkler irrigation can be achieved simultaneously by utilizing solar energy coupled with compressed air, providing a new approach for the efficient joint application of distributed solar energy resources and sprinkler irrigation.
AGRICULTURAL WATER MANAGEMENT
(2023)
Article
Chemistry, Multidisciplinary
Gang Xu, Huan Xia, Pengyu Chen, Wei She, Hanning Zhang, Jing Ma, Qiushi Ruan, Wei Zhang, ZhengMing Sun
Summary: In this work, a versatile thermochromic hydrogel system was developed by introducing sodium dodecyl sulfate (SDS) micelles into a crosslinked copolymer. The smart windows made from this hydrogel system showed excellent solar modulation ability, dual responsiveness, and adjustable phase transition temperature. They selectively blocked infrared light during the day while allowing ultraviolet and visible light through, benefiting indoor illumination and heat insulation. At night, the windows became opaque to protect privacy. This hydrogel-based smart window design offers a promising solution for energy-saving buildings.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Environmental Sciences
Beemkumar Nagappan, Yuvarajan Devarajan, Elangovan Kariappan
Summary: The study introduces a solar-powered ejector refrigeration system with serially connected collectors to reduce greenhouse gas emissions. Compared to traditional air conditioners, this system consumes 20-30% less energy and operates with a power consumption of 2.475 kW for the same specifications, making it a more energy-efficient alternative.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Construction & Building Technology
Wenzhang Li, Yonggao Yin, Yikai Wang
Summary: A heat pump-driven liquid desiccant dehumidification system is proposed in this research, which adopts a surface condenser and liquid desiccant dehumidifier to achieve two-stage air dehumidification. Experimental and analytical results in Nanjing and other cities demonstrate the superior energy-saving potential and application prospect of this system.
ENERGY AND BUILDINGS
(2022)
Article
Energy & Fuels
Renos Rotas, Maria Fotopoulou, Panagiotis Drosatos, Dimitrios Rakopoulos, Nikos Nikolopoulos
Summary: This study assesses the annual performance improvement of two actual building spaces retrofitted with Adaptive Dynamic Building Envelopes (ADBEs) and evaluates their potential to contribute to the electricity and heating load of the spaces. The results demonstrate that the ADBE system can significantly benefit the energy consumption of the buildings in Cardiff and Grevena.
Article
Construction & Building Technology
Xiaosong Su, Ling Zhang, Yongqiang Luo, Zhongbing Liu
Summary: A reversible window integrated with photovoltaic blinds has the potential to achieve higher solar energy utilization efficiency and reduce net electricity consumption. However, further research is needed to understand its overall energy performance and optimize its design.
BUILDING AND ENVIRONMENT
(2022)
Article
Energy & Fuels
Yongqiang Luo, Ling Zhang, Zhongbing Liu, Jinghua Yu, Xinhua Xu, Xiaosong Su
Article
Green & Sustainable Science & Technology
Jinghua Yu, Kangxin Leng, Hong Ye, Xinhua Xu, Yongqiang Luo, Jinbo Wang, Xie Yang, Qingchen Yang, Wenjie Gang
Article
Construction & Building Technology
Shen Xu, Zhixin Li, Chen Zhang, Zhaojian Huang, Jia Tian, Yongqiang Luo, Hu Du
Summary: Research indicates that the potential for solar energy utilization on urban rooftops is influenced by mutual occlusion between buildings. By quantifying and modeling occlusion factors in different urban blocks, it is possible to calculate the solar energy utilization potential of a city. In the case of Wuhan, applying this method yielded an annual photovoltaic power generation estimate of 168.02GWh for the Hongshan District.
SUSTAINABLE CITIES AND SOCIETY
(2021)
Article
Energy & Fuels
Chen Zhang, Zhixin Li, Haihua Jiang, Yongqiang Luo, Shen Xu
Summary: By using deep-learning method, it was found that continuous urban area, discontinuous dense urban area, and industrial, commercial, public and education units in Wuhan have higher rooftop photovoltaic potential, which should be the priority in urban planning for photovoltaic development.
Article
Construction & Building Technology
Tian Yan, Yongqiang Luo, Tao Xu, Huijun Wu, Xinhua Xu, Ji Li
Summary: The coupled pipe-encapsulated PCM wall system with a nocturnal sky radiator efficiently utilizes natural cooling sources to reduce indoor heat gain and enhance the utilization efficiency of PCM. Experimental results demonstrate that the system can significantly decrease indoor cooling load and wall internal surface temperature.
ENERGY AND BUILDINGS
(2021)
Article
Green & Sustainable Science & Technology
Xiaosong Su, Ling Zhang, Zhongbing Liu, Yongqiang Luo, Dapeng Chen, Weijiao Li
Summary: Heat loss or gain through building envelopes significantly impacts heating or cooling loads, highlighting the importance of high-performance building envelopes for energy efficiency. This study introduces a novel building envelope integrated with thermoelectric cooler and radiative sky cooler for space cooling and heat gain elimination. Through global sensitivity analysis, key parameters were identified to optimize the performance of the system in different climate conditions.
Article
Thermodynamics
Yongqiang Luo, Guozhi Xu, Shicong Zhang, Nan Cheng, Zhiyong Tian, Jinghua Yu
Summary: This study reveals the impacts of heating duration and heating load distribution on the long-term operation performance of a geothermal heat pump system based on deep borehole heat exchanger (DBHE) through numerical analysis and model establishment. It also explains how complex geological conditions affect the dynamic heat extraction and heat recovery of the DBHE system. Additionally, the study checks the robustness of the model and presents an initial investigation on DBHE array with heat recovery.
Article
Thermodynamics
Xiaosong Su, Ling Zhang, Yongqiang Luo, Zhongbing Liu, Huixian Yang, Xuchao Wang
Summary: A novel reversible PV window design was proposed, with the ability to maintain performance in summer and improve solar energy utilization in winter by reducing heat loss. Through numerical modeling, the thermal and electrical performance of this PV window in heating periods was investigated, showing benefits in reducing heating loads while generating less electric power compared to a common double-glazed PV window.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Green & Sustainable Science & Technology
Yongqiang Luo, Guozhi Xu, Nan Cheng
Summary: The study proposed a novel stratified segmented finite line source method (SS-FLS) for simulating the temperature field of deep borehole heat exchangers, which was validated and found to be accurate and robust through comparisons with actual engineering project data. Additionally, the study investigated the effects of stratification on soil and fluid temperature fields.
Article
Energy & Fuels
Jiangyang Liu, Xu Yang, Zhongbing Liu, Juan Zou, Yaling Wu, Ling Zhang, Yelin Zhang, Hui Xiao
Summary: This paper proposes an energy utilization system for buildings in hot summer and cold winter zones, which includes cold and thermal energy storage to improve building energy flexibility. The system capacity and load demand are analyzed, and the characteristics of energy-flexibility with and without energy storage are presented.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Dian-ce Gao, Yongjun Sun, Xingxing Zhang, Pei Huang, Yelin Zhang
Summary: Net-zero energy buildings (NZEBs) are a promising method for mitigating energy problems, but the frequent energy exchange with the grid imposes severe overvoltage risk. Existing studies that isolated planning and design efforts and oversimplified overvoltage quantification cannot effectively minimize the risk. This study proposes a genetic algorithm-based method to sequentially optimize planning and design parameters and accurately quantify grid overvoltage using a distribution network model.
Article
Thermodynamics
Yelin Zhang, Norman Chung Fai Tse, Haoshan Ren, Yongjun Sun
Summary: This study proposes a novel coordinated control method for reducing overvoltage risks in net-zero energy buildings (NZEBs) by adopting a more accurate voltage quantification model and an iterative optimization approach for battery operations. The results show significant improvements in overvoltage mitigation compared to uncoordinated and conventional controls.
BUILDING SIMULATION
(2022)
Article
Thermodynamics
Junhao Shen, Chaohui Zhou, Yongqiang Luo, Zhiyong Tian, Shicong Zhang, Jianhua Fan, Zhang Ling
Summary: This study introduces an analytical model based on the Segmented Finite Line Source (SFLS) method to analyze the heat transfer process of a U-type deep borehole heat exchanger (UDBHE). The model is validated by comparing it with experimental data. Results show that the heat extraction capacity of the UDBHE is influenced by design and operation parameters such as the thermal conductivity of the backfill material, pipe diameter, and flow rate.
Article
Green & Sustainable Science & Technology
Mingshan Liang, Jianhua Tu, Lingwen Zeng, Zhaoqing Zhang, Nan Cheng, Yongqiang Luo
Summary: This study establishes an effective system model and analyzes the parameters and operational modes related to the design and operation of MDBHE. The results show that borehole depth, inlet temperature, and mass flow rate are the most significant factors affecting system performance.
Article
Green & Sustainable Science & Technology
Jinghua Yu, Kangxin Leng, Feifei Wang, Hong Ye, Yongqiang Luo
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)
