Article
Thermodynamics
Wassim Salameh, Cathy Castelain, Jalal Faraj, Rabih Murr, Hicham El Hage, Mahmoud Khaled
Summary: This study proposes using the relatively cold air exhausted from HVAC systems to reduce the operational temperature of PV modules. The research found that the air mass flow rate increases with cooling load demand, leading to improved PV efficiency. Additionally, an optimal exhaust air duct height must be determined for each cooling load.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Veronika Shabunko, Samyuktha Badrinarayanan, Dhanup S. Pillai
Summary: Green buildings and renewable energy are fundamental for global sustainability, with building energy performance crucial for self-sustainability in tropical regions. This study evaluates the thermal performance of five innovative building integrated photovoltaic (BIPV) technologies in Singapore and extends the use of U-Values to assess compliance with green building codes. The ETTV sensitivity analysis conducted in this research provides accurate quantification of the thermal characteristics for future adoption of BIPV facades.
Article
Construction & Building Technology
Ahmad Riaz, Chao Zhou, Jili Zhang, Peng Wang, Ruobing Liang
Summary: The integration of photovoltaic thermal system on buildings can help reduce energy demand, with a focus on utilizing waste cooling energy. Experimental results showed a fresh air temperature difference of 10.27 degrees C and a maximum electrical efficiency of 10.16% during testing.
ENERGY AND BUILDINGS
(2021)
Article
Green & Sustainable Science & Technology
Shoaib Khanmohammadi, Amin Shahsavar
Summary: The study evaluated two designs of a hybrid building integrated photovoltaic thermal (BPT) unit and a thermal wheel (SRX) in terms of steady-state energy and exergy. The designs operate differently in summer and winter, exchanging heat for cooling or preheating. It was found that one design showed better or worse overall energy/exergy performance compared to the other.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Green & Sustainable Science & Technology
Amin Shahsavar, Pouyan Talebizadehsardari, Muslum Arici
Summary: A comparative study was conducted to evaluate a hybrid building integrated photovoltaic/thermal system and earth-air heat exchanger in comparison to individual systems. The outcomes revealed that the hybrid system outperformed in terms of energy production and the system parameters had an impact on its economic and environmental performance.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Thermodynamics
Shen Liang, Hongfei Zheng, Shuli Liu, Xinglong Ma
Summary: This paper introduces a solar concentrating photovoltaic-thermal module designed for building louvers, which combines a specially designed concentrating blade with a PV-T module to provide electricity and heat in building vertical spaces. The concentrating blade operates under solar incident angles of 0-90 degrees, with a high-efficiency photovoltaic-thermal working range of 20-70 degrees. Optical simulations show that the maximum geometrical concentration ratio is 2.96 at an incident angle of 20 degrees, and remains above 2 over a wide range of incident angles between 12.5 degrees and 52.5 degrees. Experiment results demonstrate that the CPV-T module can achieve an overall efficiency above 55% for nearly 5 hours without tracking during all-day experiments.
Article
Green & Sustainable Science & Technology
Shen Liang, Hongfei Zheng, Xuanlin Wang, Xinglong Ma, Zhiyong Zhao
Summary: This paper proposes a solar louver for harvesting solar energy in vertical building space. The solar louver consists of concentrating photovoltaic-thermal (CPV-T) modules and allows users to adjust interior daylight. Experimental results show that the solar louver maintains electrical efficiency above 4.18% and thermal collection efficiency above 55.6% within a specific range of light incident angles, making it a promising solution for building applications.
Article
Energy & Fuels
Mohammad Ghoraishi, Trevor Hyde, Aggelos Zacharopoulos, Jayanta Deb Mondol, Adrian Pugsley
Summary: This paper introduces an enhanced version of Concentrating Photovoltaic Glazing (CoPVG) device that can simultaneously harvest thermal energy and electricity. It was found that placing the vacuum glazing inside potentially doubles the electrical output power and the thermal harvesting potential is higher when the vacuum glazing is placed outside.
Article
Construction & Building Technology
Zoheir Haghighi, Mahboubeh Angali Dehnavi, Thaleia Konstantinou, Andy van den Dobbelsteen, Tillmann Klein
Summary: Despite advances in photovoltaic technology and cost reduction, there is still limited interest in architectural photovoltaic applications (APA). Lack of knowledge among architects on the possibilities and approaches to adopt APA is a major bottleneck. The research aimed to collect information from architects on their experiences and perceptions of APA, highlighting the importance of understanding the integration of PV technology into architecture.
Article
Green & Sustainable Science & Technology
Lifei Zhang, Jingyu Yu, Qingyu Shi, Quan Kong
Summary: This study evaluates the economic benefits of rooftop distributed photovoltaic projects in the whole county of China, considering multiple factors. The results show that the self-use ratio of power generation greatly impacts the economic benefits of the projects, and an optimization model is proposed. However, the economic feasibility of the projects on a county scale is found to be not financially viable. Industrial and commercial buildings have the highest installation proportion, while residential buildings have the lowest.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Energy & Fuels
Samson Yip, Andreas K. Athienitis, Bruno Lee
Summary: This paper examines the influence of building form on the energy performance of medium-sized institutional solar net zero energy buildings with BIPV/T roof systems. Through simulations, the most sensitive design variables were identified, including orientation, window to wall ratio, plan shape, and roof tilt angle. Interaction effects between plan shape and orientation were significant, emphasizing the importance of analyzing these factors at the early design stage.
Article
Green & Sustainable Science & Technology
Suqi Wang, Seyed Amin Bagherzadeh, Ahmed N. Abdalla, Muhammad Shahzad Nazir
Summary: This study aims to estimate the annual exergy yield of a hybrid system consisting of a PV/T system and a thermal wheel. A systematic method is proposed to find the optimal configuration of Artificial Neural Network (ANN) for modeling the exergy of the hybrid system.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Construction & Building Technology
Mohammad Rahiminejad, Alexandre Louis Marie Paris, Hua Ge, Dolaana Khovalyg
Summary: This study investigates the impact of ventilated air-spaces behind external claddings on the performance of wall structures, and finds that changing the cladding type and increasing cavity thickness can affect the thermal energy flow and surface temperature of the wall.
ENERGY AND BUILDINGS
(2022)
Article
Engineering, Chemical
Raquel Simon-Allue, Raul Villen, Gonzalo Brun, Yolanda Lara, Isabel Guedea
Summary: In the past decade, there has been increased interest in hybrid photovoltaic-thermal (PVT) technologies. However, further long-term studies are required for the full implementation of air-based PVT panels. This paper presents an experimental framework for an air-based PVT collector, which consists of a high-quality photovoltaic laminate and a newly designed thermal absorber. The experimental results indicate a consistent electrical performance of 15-19% and varying thermal performance, ranging from 15-52% for individual panels and 11-35% for a 2.5 panel system in series to maximize output temperature. The field operation achieved average thermal and electrical efficiencies between 16-20% with an electrical-thermal generation ratio close to 1:1.
Article
Energy & Fuels
Zirui Yin, Tao Zhang, Jingyong Cai, Yi Fan, Zhengrong Shi
Summary: The building-integrated photovoltaic (PV) technology alleviates electricity consumption during peak usage time. This study proposes a novel lightweight crystalline silicon PV module to address the problems of traditional silicon and thin film modules. An electro-thermal coupling model and experimental platform are established to analyze the operating characteristics and energy-saving effects of the novel lightweight PV roof. The results show that the lightweight PV roof slightly increases the cooling load but provides significant electricity benefits and energy-saving effects.
Article
Thermodynamics
Muhammad Zeeshan Malik, Farayi Musharavati, Faraedoon Waly Ahmed, Shoaib Khanmohammadi, Angel G. Fernandez
Summary: This study investigates the effects of different metal nitrates compositions on the viscosity and thermal conductivity of new molten salt for solar power plants, with experimental results showing significant changes in properties at high temperatures. Using an Artificial Neural Network, two polynomials are developed to accurately predict viscosity and melting point temperature, achieving high precision with R-2 values of 0.9289 and 0.9678.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Physical
Farayi Musharavati, Shoaib Khanmohammadi
Summary: The principal aim of the research is to design and optimize a multi-generation unit that can generate electricity, potable water, and hydrogen. The system includes a gas turbine unit, a high-temperature solid-oxide fuel cell (SOFC), a combustion chamber, and a multi-effect desalination (MED) system. The study examines the impact of current density on the performance of the SOFC and uses exergo-economic multi-criteria optimization to determine the optimized parameters for higher efficiency and lower cost. The suggested arrangement is capable of generating desalinated water, electricity, and hydrogen energy with a certain level of exergy efficiency.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Environmental Sciences
Farayi Musharavati, Alireza Khoshnevisan, Seyed Mojtaba Alirahmi, Pouria Ahmadi, Shoaib Khanmohammadi
Summary: In this research, an innovative biomass-based energy system is proposed for power and desalinated water production. Through a comprehensive thermodynamic and thermoeconomic assessment, the optimal solution with the highest exergy efficiency and the minimum amount of total cost rate is obtained. The artificial neural network plays an important role in decreasing computational time during the optimization process. Additionally, the distribution of key decision variables has a significant impact on the system optimization.
Article
Energy & Fuels
Shadi Bashiri Mousavi, Pouria Ahmadi, Pedram Hanafizadeh, Shoaib Khanmohammadi
Summary: Liquid air energy storage (LAES) system utilizes packed bed thermal energy storage (PBTES) to improve system performance. Under ideal conditions, the system can generate 1.8 MWh of electricity during peak periods and achieve a payback period of 6.7 years with a total profit of 0.66 million dollars. However, the transient behavior of the system leads to a decrease in performance over different cycles.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Green & Sustainable Science & Technology
Zahra Mohammadi, Farayi Musharavati, Pouria Ahmadi, Shayan Rahimi, Shoaib Khanmohammadi
Summary: This study conducted conventional and advanced exergy analyses for an ammonia-water combined power and cooling cycle integrated with a low-temperature geothermal heat resource. The results showed that improving the turbine, boiler, and rectifier is more efficient in increasing system efficiency due to high endogenous avoidable exergy destruction. The study also compared the prioritizing of component improvements based on conventional and advanced exergy analyses.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Energy & Fuels
Shoaib Khanmohammadi, Kazem Atashkari
Summary: This research investigates an integrated renewable-based energy system that utilizes a biomass gasifier for generating electricity, heating, hot water, and freshwater. The study evaluates the emission of the system and finds that the emission cost of NOx is higher than other species due to its harmful effects. The results also indicate that higher values of design parameters result in a decrease in the sustainability index.
Article
Energy & Fuels
Esmail Khalife, Mohammad Kaveh, Abdollah Younesi, Dhinesh Balasubramanian, Shoaib Khanmohammadi, Bahman Najafi
Summary: This study modeled a diesel engine combustion and used different algorithms to predict engine performance and emissions. The results showed that the Gray Wolf Optimization algorithm performed the best in terms of efficiency and fuel consumption, making it suitable for fuel and engine manufacturers.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Engineering, Environmental
Shoaib Khanmohammadi, Farayi Musharavati, Rasikh Tariq
Summary: This study utilizes data modeling and artificial intelligence techniques to optimize geothermal energy-driven systems in various scenarios. The artificial neural network provides the best fit to the data, and energy-efficient and economic designs perform well in terms of total work output and electricity cost.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Thermodynamics
Shoaib Khanmohammadi, Morteza Saadat-Targhi, Amin Nabati
Summary: This paper presents a modeling and optimization study on a novel integrated textile factory and power system using geothermal energy. The results show that the proposed system, along with a waste heat recovery system, can improve energy and exergy performance.
Article
Engineering, Chemical
Shoaib Khanmohammadi, Nima Mazaheri, Mehdi Bahiraei
Summary: This study numerically simulates the heat transfer inside enhanced tubes with a coaxial double-twisted tape in an eco-friendly nanofluid containing graphene nanoplatelets (GNPs). The results show that as the particle concentration increases, the thermal entropy generation rate decreases while the heat transfer coefficient increases. It was found that reducing the twisted ratio can significantly decrease the thermal entropy generation rate. Adding more GNPs to the fluid leads to an increase in pressure drop or frictional entropy generation. The optimization results using a genetic algorithm show the existence of multiple optimal states.
Article
Green & Sustainable Science & Technology
Amin Shahsavar, Shoaib Khanmohammadi
Summary: The present study investigates the impact of the number of objective functions on the optimal performance of an exhaust air heat recovery system. Various optimization scenarios were compared, and it was found that the single-objective optimization based on CO2 minimization yielded the best results when meeting the building's energy requirements without producing excess energy.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Engineering, Chemical
Shoaib Khanmohammadi, Shabnam Razi, Mostafa Delpisheh, Hitesh Panchal
Summary: This paper addresses the thermodynamic modeling and multi-objective optimization of a solar-based multi-generation system. The study aims to assess and optimize the solar system to generate potable water and other valuable products. Parameter analysis and multi-objective optimization were conducted to determine the key parameters affecting system performance.
Article
Thermodynamics
Shoaib Khanmohammadi, Ali Jahangiri, Faezeh Nazari, Neda Azimi
Summary: The study investigated the effect of dimpling the tube and using turbulators on heat transfer rate. It showed that increasing the number of dimples improved the Nusselt number, but also increased friction entropy. Overall, the study confirmed that combining dimples and turbulators could enhance the heat transfer process.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Thermodynamics
Nima Mazaheri, Shoaib Khanmohammadi, Mehdi Bahiraei, Zafar Said
Summary: This study investigates the impact of alumina-water nanofluid on the thermally generated entropy in a ribbed passage. The results show that the nanofluid can significantly reduce the thermal entropy, with the triangular-shaped rib demonstrating better performance.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2022)
Article
Thermodynamics
Keyvan Ahmadi, Saber Khanmohammadi, Shoaib Khanmohammadi, Mehdi Bahiraei, Quang-Vu Bach
Summary: In this study, a numerical simulation is conducted to improve the thermal performance of a circular pipe using elliptical-cut twisted tape inserts and nanofluid. The results show that the use of elliptical-cut twisted tape and nanofluid can significantly enhance heat transfer and thermal efficiency factor.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
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.
