Review
Thermodynamics
Nicolae Vlad Burnete, Florin Mariasiu, Christopher Depcik, Istvan Barabas, Dan Moldovanu
Summary: With the growing emphasis on electrified vehicles, the use of internal combustion engines (ICEs) as the primary propulsion source is being challenged, necessitating improvements in efficiency and emissions. Recovering waste heat from the ICE can enhance overall thermal efficiency, and thermoelectric generators offer advantages such as environmental friendliness, reliability, and direct conversion of thermal energy into electrical energy. This study provides a comprehensive overview of the use of thermoelectric generators for waste heat recovery in ICEs, presenting experimental and simulation results on power output, efficiency gains, and fuel consumption reduction. It also summarizes the design considerations for the hot side heat exchanger.
PROGRESS IN ENERGY AND COMBUSTION SCIENCE
(2022)
Article
Thermodynamics
Rui Quan, Wenlong Liang, Shulang Quan, Zikang Huang, Zhizheng Liu, Yufang Chang, Baohua Tan
Summary: The structure optimization of heat exchanger can enhance the output performance of a thermoelectric generator (TEG) used for automobile exhaust recovery. However, connecting the heat exchanger to the internal combustion engine (ICE) may lead to increased backpressure and deteriorative performance. This study sets up and validates a comprehensive numerical model to assess the performance interaction between automobile exhaust thermoelectric generator (AETEG) and ICE with different heat exchangers. The results show that the operating condition and inner topology of ICE have obvious influences on the backpressure of the heat exchanger, with the chaos shape heat exchanger having the largest backpressure. The increased backpressure affects various parameters of ICE and AETEG, such as pumping mean effective pressure (PMEP), hot side temperature, output power, brake power, brake torque, volumetric efficiency, fuel economy, and emissions. The findings provide valuable insights for the development, topology optimization, and performance assessment of a low-backpressure AETEG without significantly impacting the ICE performance.
APPLIED THERMAL ENGINEERING
(2022)
Article
Energy & Fuels
Rui Quan, Yousheng Yue, Zikang Huang, Yufang Chang, Yadong Deng
Summary: This study investigates the effects of adding fins to the heat exchanger of an automobile exhaust thermoelectric generator (AETEG) on the generated power. While fins increase the temperature difference of thermoelectric modules (TEMs) and enhance the power output, they also result in undesired backpressure that affects the performance of the internal combustion engine (ICE). Experimental results show that a heat exchanger with a chaos-shaped structure has a larger pressure drop compared to one with a fishbone-shaped structure, leading to increased power output and temperature of the AETEG.
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
(2022)
Article
Thermodynamics
Zhengyang Zhao, Zhengxing Zuo, Wei Wang, Ruiheng Liu, Nianling Kuang
Summary: The research quantitatively studied the effects of key parameters of thermoelectric systems based on hydrocarbon fuel combustion on a micro scale using simulation models with variable temperature parameters. The results showed that a two-stage thermoelectric module design can improve overall efficiency but may not be conducive to miniaturization and combustion efficiency.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Minghui Ge, Zhenhua Li, Yulong Zhao, Liyao Xie, Shixue Wang
Summary: A thermoelectric generator generates electricity by recovering waste heat from automobile exhaust, utilizing gasification and condensation of the medium to improve power density. The exhaust temperature affects maximum output power, while the optimal module area increases with increasing exhaust flow.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
WenChao Zhu, Wenlong Yang, Yang Yang, Yang Li, Hao Li, Ying Shi, Yonggao Yan, Changjun Xie
Summary: This paper establishes an advanced non-isothermal mathematical model of automobile annular thermoelectric generators (ATEGs) using the finite element method. The effects of different vehicle operating conditions on the optimal thermoelectric semiconductor volume are investigated, and the optimal range for selecting the thermocouple volume is determined. Two new schemes are proposed to optimize the system configuration and a new method for assessing the power generation cost is proposed. The optimal design is obtained and the results show its advantages in net power and efficiency.
Article
Thermodynamics
Qingsong Zuo, Yongchuan Xie, Wei Chen, Xinning Zhu, Yuanyou Tang, Yong Xie, Hehui Zhang, Ying Ma
Summary: This paper investigates the effect of aspect ratio on the output performance of thermoelectric generator (TEG) systems. It is found that TEG systems with low aspect ratio channels exhibit better output performance, with 18.3% higher output power than TEG systems with high aspect ratio channels. The lower aspect ratio reduces the hydraulic diameter of the collector channel and improves heat transfer performance. Additionally, the study analyzes the effects of fin number and load resistance on the TEG system's output performance. The research provides new ideas for improving the output performance of TEG systems.
APPLIED THERMAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Yurong Yang, Shixue Wang, Yu Zhu
Summary: This paper focuses on evaluating the performance of automotive exhaust thermoelectric generators (AETEGs) under actual driving conditions. A numerical model and a weighted analysis method based on exhaust conditions were developed to obtain the output performance and optimal module area of the AETEG. The results showed significant improvements in the maximum power output and optimal module area with the use of the weighted analysis method. In addition, a simplified calculation method for the performance parameters of an AETEG was presented, which is more convenient and efficient for engineering applications.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Energy & Fuels
Ding Luo, Yuying Yan, Ying Li, Ruochen Wang, Shan Cheng, Xuelin Yang, Dongxu Ji
Summary: This study proposes a hybrid transient CFD-thermoelectric numerical model to predict the dynamic response characteristics of an automobile thermoelectric generator system. Through transient numerical study, it is found that the dynamic output power changes smoothly while the conversion efficiency fluctuates greatly. The findings contribute to a better understanding of the dynamic response characteristics of the automobile thermoelectric generator system.
Article
Energy & Fuels
Nguyen Xuan Khoa, Ocktaeck Lim
Summary: This review paper summarizes the effects of external and internal exhaust gas recirculation on the performance and emission characteristics of diesel, gasoline, and alternative fuel engines, and introduces control strategies and prediction methods for internal and external exhaust gas recirculation.
Review
Energy & Fuels
S. T. P. Purayil, Mohammad O. Hamdan, S. A. B. Al-Omari, M. Y. E. Selim, E. Elnajjar
Summary: Rapid depletion of conventional fossil fuels and increasing environmental concern have led to an urgent need for research on finding an alternative fuel with minimal environmental impacts. Hydrogen is considered as an important fuel for the future, as it addresses the aforementioned pressing issues. This review critically analyzes the combustion performance, emission, and cyclic variation characteristics of a hydrogen-gasoline dual fuel engine. According to scientific literature, hydrogen-gasoline dual fuel engines exhibit good thermal efficiency at low and partial loads, but their performance deteriorates at high loads.
Article
Thermodynamics
Bin Huang, Zu-Guo Shen
Summary: In this study, annular thermoelectric generators (ATEGs) that match the geometric shape of automobile exhaust pipes were proposed to recover waste heat from automobiles. A theoretical model was constructed to assess the performance of automotive exhaust ATEGs (AEATEGs) and compared to commonly used automotive exhaust flat-plate thermoelectric generators (AEFTEGs). The results showed that AEATEGs outperformed AEFTEGs in terms of performance.
Article
Thermodynamics
Kartik Srivastava, Rashmi Rekha Sahoo
Summary: This study examines a new vortex generator installed on the hot side of a thermoelectric generator's exhaust heat exchanger and analyzes its performance using numerical methods. The experiment identifies the best design configuration for the vortex generator to optimize power output in a waste heat recovery system. The results show that the configuration with a pitch/channel height ratio of 3 and a tilt angle of 60 degrees achieves the highest power output. Additionally, the study finds that the vortex generator can improve the fuel consumption efficiency of the engine.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Energy & Fuels
B. Karpanai Selvan, Soni Das, M. Chandrasekar, R. Girija, S. John Vennison, N. Jaya, P. Saravanan, M. Rajasimman, Yasser Vasseghian, N. Rajamohan
Summary: The study investigates the performance and emission characteristics of various biomass blends in a diesel engine. The results show that the AO10D blend performs well with higher thermal efficiency and lower emissions at 50% load.
Article
Environmental Sciences
Sang -Hee Woo, Hyungjoon Jang, Seung-Bok Lee, Seokhwan Lee
Summary: Electric vehicles (EVs) still contribute non-exhaust particulate matter (PM) emissions, but the emission levels depend on factors such as brake pad type and regenerative braking intensity. In certain scenarios, EVs can have lower total PM emissions compared to internal combustion engine vehicles (ICEVs).
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Thermodynamics
Jingchen Cui, Liping Chen, Wuqiang Long, Xiangyu Meng, Bo Li, Yang Wang, Hua Tian
Summary: This paper proposes an innovative axial shift valvetrain system to meet the air-charging requirements of a 2/4-stroke engine and establishes a simulation model to evaluate the valve motion. The simulation results show that the proposed valvetrain system meets the valve motion requirements at the target engine speed.
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2023)
Article
Thermodynamics
Hangpeng Jiang, Wei Shen, Shijie Bai, Dongping Chen, Chenguang Wang, Xingyu Liang, Kun Wang
Summary: The recently-proposed HyChem approach achieved success in modeling the combustion chemistry of liquid jet fuels, but the role of oxygenated intermediates has not been examined. This study revised the HyChem model by jointly examining pyrolysis and oxidation experiment data to uncover the impact of critical oxygenated intermediates on combustion chemistry. The revised model showed improved predictions, especially for oxygenated intermediates, and was validated using speciation data and global combustion properties.
COMBUSTION AND FLAME
(2023)
Article
Energy & Fuels
Zhenxian Zhang, Wuqiang Long, Pengbo Dong, Hua Tian, Jiangping Tian, Bo Li, Yang Wang
Summary: In this study, the Ammonia/Diesel dual direct injection mode of a two-stroke low speed engine was evaluated. It was found that the injection timing of diesel can regulate the engine combustion phase, improving the combustion efficiency and indicated thermal efficiency of ammonia. Furthermore, by optimizing the injection timings of diesel and ammonia, the fuel type NOx emission produced by ammonia combustion can be reduced.
Article
Energy & Fuels
Xiuxiu Sun, Peixin Zhao, Xingyu Liang, Guoxi Jing, Zhige Zhou, Guang Chen
Summary: This study discusses the effects of thermo-physical properties and chemistry of in-cylinder steam injection on combustion and emissions characteristics of a gasoline engine. A computational fluid dynamic model is used to investigate the combustion characteristics and a premixed laminar flame model is developed to examine the influence of steam injection on laminar flame speed. The findings show that manipulating the thermo-physical properties of steam injection can improve engine performance.
Article
Environmental Sciences
Yajun Wang, He Yang, Xingyu Liang, Haiqing Song, Zhiping Tao
Summary: The oxidation behaviors of soot particles from a diesel engine when using neat diesel fuel and lubricating base oil-blended fuel were investigated. The changes in particle size and nanostructure parameters during soot oxidation were analyzed. Results showed that the oxidation of soot particles exhibited a transition from surface oxidation to internal oxidation, which was enhanced by combustion of base oil. HRTEM results revealed a transformation of the nanostructure from disordered to more graphitized structure during soot oxidation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Energy & Fuels
Mingfei Lu, Dongsheng Dong, Fuxing Wei, Wuqiang Long, Yongjian Wang, Lixin Cong, Pengbo Dong, Hua Tian, Peng Wang
Summary: Ammonia is considered as an attractive alternative fuel for internal combustion engines, but has issues of high ignition temperature and NOx emissions. Blending ammonia with methanol can solve the problems, but there are few studies on the combustion mechanism of this dual fuel. This paper developed a chemical reaction mechanism for ammonia-methanol blends and studied its effects on combustion and emissions.
Article
Energy & Fuels
Hua Tian, Zhaoxian He, Xuanang Zhang, Ligeng Li, Jinwen Cai, Xuan Wang, Xingyu Liang, Gequn Shu
Summary: This paper aims to reveal the matching relationship between engine waste heat conditions and different configurations of the organic Rankine cycle (ORC), providing guidance for selection. By describing the characteristics of exhaust gas temperature and heat ratio of high and low temperature waste heat, four mostly investigated ORC configurations are selected and modified to efficiently utilize all waste heat sources. Their thermodynamic performance is optimized, and the results show improvements in net power for all configurations. Two selection maps are established to provide general references for selecting the configuration based on different waste heat characteristics.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Chemistry, Physical
Yongjian Wang, Wuqiang Long, Pengbo Dong, Hua Tian, Yuanyou Tang, Yang Wang, Mingfei Lu, Weiqi Zhang
Summary: In order to improve the efficiency and reduce NOx emissions in stoichiometric hydrogen-enriched natural gas (NG) engines, a detailed 3-D simulation model based on actual boundary conditions was developed. Various methods, such as Miller valve timing, hydrogen volume fraction, and EGR rate, were proposed and investigated for knock regulation, combustion, and emission control. The study found that knock causes a bimodal characteristic of the heat release rate (HRR) curve, limiting the performance improvement of stoichiometric NG engines under high load conditions. To accurately predict and control the occurrence of the second peak of HRR, a new parameter called BI was defined. Additionally, the Miller timing with 20 degrees CA of the intake valve late closing showed better combustion performance within the knock limit, albeit with a slight increase in NOx emissions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Xiuxiu Sun, Peixin Zhao, Xingyu Liang, Guoxi Jing, Guang Chen
Summary: This study investigates the impact of direct steam injection (DSI) on the performance and emissions of marine engines using simulation models based on experimental data. Steam is generated through waste heat recovery in a marine engine. The study explores the limitations of DSI parameters based on exhaust gas temperature and reveals that steam mass is crucial for reducing NOx emissions and enhancing power. The findings demonstrate the energy-saving and emission reduction potential of the DSI approach for marine engines, emphasizing the need for optimizing the steam-injection strategy in the future.
JOURNAL OF ENERGY ENGINEERING
(2023)
Article
Geosciences, Multidisciplinary
Xingyu Liang, Bo Li, Xinyue Zhang, Huaikun Qin, Gao Li, Chengnan Zhang
Summary: The Fuli Pb-Zn deposit in Yunnan, China, is a significant deposit with approximately 0.3 million tons of lead and zinc reserves. The main sulfides in this deposit are sphalerite, galena, and pyrite, occurring in the interlayer fracture zone of the middle Permian Yangxin formation dolomite. The Fuli deposit exhibits different colors of sphalerite, which can be attributed to the presence of various elements.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Energy & Fuels
Fuxing Wei, Mingfei Lu, Wuqiang Long, Dongsheng Dong, Pengbo Dong, Ge Xiao, Jiangping Tian, Hua Tian, Peng Wang
Summary: Ammonia has the potential to reduce carbon dioxide emissions as an alternative fuel, but its extensive application is limited by high ignition temperature and unstable combustion. This study uses an ignition chamber as an ignition energy-enhanced method to improve the combustion performance and extend the ammonia lean flammability limit. Methanol is used as a high-activity fuel in the ignition chamber and the main chamber. The results show that methanol jet ignition reduces combustion duration compared to spark ignition. The addition of methanol in the main chamber improves combustion duration at lean conditions compared to pure ammonia.
Article
Energy & Fuels
Fuxing Wei, Peng Wang, Jianlin Cao, Wuqiang Long, Dongsheng Dong, Hua Tian, Jiangping Tian, Xiaolei Zhang, Mingfei Lu
Summary: Blending ammonia with high-activity fuels and utilizing high-energy ignition can accelerate ammonia combustion. The jet-controlled compound ignition (JCCI) using an ignition chamber fueled by H2 was proposed in this study. By using JCCI, a combustion duration of 85 ms was achieved under an equivalent ratio of 1.0, which is 47.7% shorter than spark ignition (SI). Furthermore, JCCI showed excellent lean burn performance and the combustion duration was reduced by up to 52.2% compared to SI ignition.
Article
Energy & Fuels
Dongsheng Dong, Rui Wang, Fuxing Wei, Jiya Yang, Pengbo Dong, Wuqiang Long, Mingliang Wei, Bo Li, Hua Tian
Summary: Thermal insulation coating is a low heat rejection technology for enhancing engine thermal efficiency, but it increases piston temperature and causes combustion issues for high-power engines. This study used experiments and simulations to analyze and improve the combustion quality of a high-power engine with thermal insulation coating. The results showed that increasing fuel injection pressure and impingement distance improved combustion.
JOURNAL OF ENERGY ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Xingyu Liang, Xiaoyu Gu, Myint Myint Paing Hsu, Yuhang He, Rongzhuo Zhang, Conghui Cai, Zheng Wang
Summary: In this paper, three composite structures of plywood products S1, S2 and S3 were designed to improve the fire resistance, water resistance and wear resistance of ordinary plywood products in the wood processing industry. A reasonable production process was proposed and the applicability of composite plywood was evaluated through physical and mechanical properties and fire resistance testing. The results showed that the physical mechanics of the three types of composite plywood met the standard requirements, with S3 having the best fire resistance and the lowest additional cost. The S3 structural plywood product, composed of a 1mm thick HPL fireproof board in the surface layer and a 12mm thick ordinary plywood in the core layer, was identified as the most cost-effective product.
JOURNAL OF RENEWABLE MATERIALS
(2023)
Review
Materials Science, Paper & Wood
Zheng Wang, Dong Zhang, Zhiheng Wang, Xingyu Liang, Xiaojun Yang, Jun Wang, a Xiaojun Yang, Jun Wang
Summary: Wood is a non-homogeneous and orthotropic natural polymer material. Accurate and reliable testing of wood shear modulus and elastic constants using dynamic methods is crucial. This paper introduces the advantages of six common methods for dynamic testing of wood shear modulus, and points out the issues associated with their applicability and accuracy. New methods, such as the free square plate torsional mode method and the square plate static torsional strain method, are presented as effective ways to tackle these issues. These approaches are expected to provide beneficial technical support for overcoming size effects, simplifying testing procedures, and expanding the application range in the dynamic testing of wood shear modulus.
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.