Article
Thermodynamics
Jiaheng Yu, Thao T. T. Nguyen, Anisha Pawar, Peter C. Wayner, Joel L. Plawsky, David F. Chao, Ronald J. Sicker
Summary: The Constrained Vapor Bubble (CVB) design was studied in microgravity aboard the ISS, showing how different condenser temperatures affect heat transfer and fluid flow behavior with different working fluids. Results were summarized onto a single Nusselt number vs. Marangoni number curve, showing a decrease in Nusselt number with increasing Marangoni number to the 1/3 power.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Zehui Yang, Yunfei Zhang, Lizhan Bai, Haonan Zhang, Guiping Lin
Summary: In this work, a stainless steel-ammonia loop heat pipe with a rectangular evaporator and longitudinal replenishment was designed and tested. The startup characteristics, dynamic operation, heat transfer limit, and thermal resistance were investigated through extensive experiments. The results showed that the LHP exhibited excellent startup performance and could reach a heat transfer limit up to 110 W. The heater area and position played a significant role in the heat transfer limit.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Hainan Zhang, Yaling Tian, Changqing Tian, Zhiqiang Zhai
Summary: In this paper, a compact flat-evaporator loop heat pipe is designed and the effects of key structural parameters and working conditions on its dynamic and steady-state performance are studied. The results show that increasing heat load or the filling ratio, arranging vapor channels in the middle of the wick (rather than at the bottom) or lengthening the condenser can all reduce the temperature fluctuation; A small inclination angle of 5° and 10° can reduce the temperature fluctuation and the stable temperature, while large inclination angle of 15° will instead bring higher stable temperature; When the heat load increases step by step, the stable temperature (average temperature for fluctuation conditions) decreases and then increases for all filling ratios and structures; Minimized thermal resistance is achieved by optimizing wick and condenser structure under low and high heat load, respectively.
Article
Thermodynamics
M. Sakthi Priya, D. Sakthivadivel
Summary: This study investigates the thermal performance of a novel design of a non-uniform structure heat pipe. The results show that the non-uniform structure heat pipe can significantly reduce thermal resistance and improve thermal efficiency.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Thermodynamics
Youngmi Baek, Eui Guk Jung
Summary: This study analyzed the experimental results regarding the heat transfer performance of a loop heat pipe (LHP) with a vapor bypass line and a polypropylene fiber capillary wick. The findings showed that the bypass line operation significantly improved the minimum start-up thermal load, start-up thermal performance, and steadystate performance of the LHP.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Yongmi Baek, Eui Guk Jung
Summary: This study analyzed the heat transfer performance of a loop heat pipe with a vapor bypass line and a polypropylene fiber capillary wick. The results showed that the use of the bypass line operation can reduce the minimum start-up thermal load, eliminate temperature overshoot in the evaporator outer wall, and improve steadystate heat transfer performance under high thermal loads.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
S. C. Zhao, Zikang Zhang, Runze Zhao, Tong Wu, Xiaoyu Zhang, Z. C. Liu, Wei Liu
Summary: A reliable cooling solution for high power electronic devices was proposed in this paper, which involved the design of two loop heat pipe systems with flat-plate evaporator. The thermal performance of the loop heat pipe with a new refrigerant, R1234ze (E), was investigated. Two cooling methods, liquid-condenser and air-condenser, were designed to meet different cooling requirements. The reliability of the solution was fully verified, and the system showed quick response and no failures under different operating conditions. The liquid-condenser achieved a maximum heat load of 270 W (16.9 W/cm2), while the air-condenser had a normal operating range of 10 W-150 W with a fan power of 20 W.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Thermodynamics
Prem Kumar, Mayur Gachake, Sameer Khandekar
Summary: The study focuses on reducing heat leak in loop heat pipes (LHP) by manipulating the properties of the copper wick, leading to improved thermal performance. It was found that the oxidized copper wick performs better thermally than the pure copper wick, attributed to the lower thermal conductivity of the oxidized porous wick reducing heat leak.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
A. Ueno, S. Tomita, H. Nagano
Summary: This study presents thin-loop heat pipes with a thickness of 1mm and a one-way transport length of 200mm. Through experiments, it was demonstrated that the tLHPs are capable of transporting heat up to 12W reliably, operating stably without temperature hysteresis within a range of heat loads.
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
(2021)
Article
Thermodynamics
Wei-Wei Wang, Yong-Juan Song, Bin Li, Di Liu, Fu-Yun Zhao, Yang Cai
Summary: Flat heat pipes (FHPs) are proposed as an innovative solution for thermal management in aerospace applications, with the ability to transport high density energy fluxes without gravity and minimal energy consumption. A novel FHP design with bionic grading evaporator structured surface and bi-directional transport capillary structure is introduced to enhance the heat transfer performance. Experimental results show that the FHP achieves minimal temperature difference and high heat transport performance under anti-gravity conditions, making it suitable for multi-gravity working conditions in aerospace.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Nguyen Phan, Yuki Saito, Naoki Katayama, Hosei Nagano
Summary: This study presents the operating characteristics of a dual flat-evaporator loop heat pipe for single heat source cooling in any orientation, comparing its performance with other single evaporator LHPs. The results show that the performance of the dual flat-evaporator LHP remains relatively stable across different orientations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Depu Lu, Rongjian Xie, Jiajia Wen
Summary: In this paper, a new type of multi-evaporator loop heat pipe prototype with a dual-layer condenser was designed, which showed uniform and symmetrical layout of pipelines. The prototype demonstrated successful start-up in different heating modes and good heat sharing characteristic.
JOURNAL OF THERMAL SCIENCE
(2023)
Article
Thermodynamics
Cheong Hoon Kwon, Eui Guk Jung
Summary: This paper presents the experimental results of controlling the evaporator wall temperature overshoot problem under a high thermal load by applying a bypass line to the loop heat pipe (LHP). The experimental results demonstrate that the bypass line can effectively control the evaporator wall temperature overshoot during start-up under high thermal loads.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Y. Qu, S. Qiao, D. Zhou
Summary: The steady-state heat transfer model of the asymmetric dual-evaporator loop heat pipe (DE-LHP) reveals that the operating temperature is influenced by the position of the compensation chambers (CCs) and the heat load distribution between the two evaporators. Different domination zones, such as position domination zone and heat load distribution domination zone, are observed when analyzing the heat sharing characteristics and influence of heat sink and ambient temperature on operating temperature. Operating temperature reaches a minimum when heat loads applied to the two evaporators are equal.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Chao Liu, Dinghua Hu, Qiang li, Xuemei Chen, Zhiwei Zhang, Fan Zhou
Summary: The study focuses on the fabrication and thermal performance of vapor chambers with multi-layer sintered wicks and multi-artery wick design for liquid supply. Different combinations of copper particle sizes were applied to balance liquid collecting rate and flow resistance, resulting in an optimized design with a pore size combination of 50/100 µm. The research also found that higher surface area porosity can effectively increase the critical heat flux of vapor chambers with similar multi-artery wick structures.
APPLIED THERMAL ENGINEERING
(2021)
Article
Chemistry, Physical
Ugochukwu Ngwaka, Andrew Smallbone, Boru Jia, Christopher Lawrence, Ben Towell, Sumit Roy, K. Shivaprasad, Anthony Paul Roskilly
Summary: The experimental results show that equivalence ratio and engine speed affect engine operation characteristics, and it is important to avoid unwanted disturbance to the electric generator operation. The four-stroke cycle mode has a higher indicated thermal efficiency compared to the two-stroke cycle mode.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Thermodynamics
Huihua Feng, Zhiyuan Zhang, Boru Jia, Zhengxing Zuo, Andrew Smallbone, Anthony Paul Roskilly
Summary: The FPEG is a new energy conversion device that converts the chemical energy of fossil fuels into electric energy and is suitable for range extenders in electric vehicles. Research on the optimal compression ratio of FPEG during cold start shows that the target compression ratio is crucial while the operating frequency has minimal impact on system performance.
APPLIED THERMAL ENGINEERING
(2021)
Review
Energy & Fuels
Yidong Fang, Yiji Lu, Anthony Paul Roskilly, Xiaoli Yu
Summary: The article describes the application of emission free compressed air powered energy system in vehicular transportation, including technological development, design of compressed-air powered powertrain, and advantages and limitations of pneumatic hybrid technologies. It discusses the opportunities and challenges for compressed-air technology in transportation applications.
ENERGY STRATEGY REVIEWS
(2021)
Article
Green & Sustainable Science & Technology
Max Patel, Sumit Roy, Anthony Paul Roskilly, Andrew Smallbone
Summary: This research introduces a novel method called "Hydrogen Interconnector System" (HIS) for long-distance electrical energy transportation. It converts stranded renewable energy into hydrogen and transports it via pipelines to the demand center, where it is reconverted to electricity. The study shows that the HIS is competitive with High Voltage Direct Current (HVDC) systems in terms of economic and technological indicators, and it also has lower investment costs in certain scenarios.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Energy & Fuels
Alessandro Giampieri, Zhiwei Ma, Janie Ling-Chin, Huashan Bao, Andrew J. Smallbone, Anthony Paul Roskilly
Summary: The paper developed correlations for predicting the moisture and enthalpy effectiveness of the liquid desiccant dehumidification and regeneration process. The developed correlations showed a good match with the experimental data and performed better than other correlations available in the literature. These correlations will be useful for quick system design and performance analysis, providing cost-effective solutions for liquid desiccant technology.
Article
Energy & Fuels
Max Albert, Zhiwei Ma, Huashan Bao, Anthony Paul Roskilly
Summary: Pumped Thermal Energy Storage (PTES) technology offers multidimensional advantages, with findings indicating that longer and thinner thermal storage tanks can increase system efficiency. Operating with larger 'temperature ratio' segmentation can also improve round-trip efficiency, while the duration of the high power region and steepness of the power front significantly impact power output.
Article
Thermodynamics
A. Giampieri, Z. Ma, J. Ling-Chin, A. P. Roskilly, A. J. Smallbone
Summary: The study reviews the role of HVAC systems in airborne viral transmission and estimates the energy penalty associated with their adoption. Liquid desiccant technology is proposed as a solution to improve indoor air quality and reduce the infectivity of pathogens. The study concludes that liquid desiccant technology could be beneficial in buildings or enclosed spaces where humidity control is needed or during virus outbreaks.
Article
Thermodynamics
Zhiyuan Zhang, Huihua Feng, Boru Jia, Zhengxing Zuo, Xiaodong Yan, Andrew Smallbone, Anthony Paul Roskilly
Summary: Stable combustion in dual-cylinder free-piston engine generators is a challenge due to potential variations in both cycles and between cylinders. The system shows anti-interference properties but is sensitive to external conditions and operating parameters. Simulation results indicate that the system can quickly return to a stable state after single combustion variations.
Article
Thermodynamics
Alessandro Giampieri, Zhiwei Ma, Janie Ling-Chin, Andrew J. Smallbone, Anthony Paul Roskilly
Summary: The paint shop is the most energy-intensive process in an automotive manufacturing plant. Incorporating liquid desiccant technology into air management systems for paint shops can increase energy efficiency and achieve significant energy savings.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Energy & Fuels
L. Jiang, Y. C. Lin, W. Liu, Z. W. Ma, R. Q. Wang, X. J. Zhang, A. P. Roskilly
Summary: Sorption thermal energy storage is a promising method for reducing building heating energy consumption. MgCl2·6H2O shows high energy storage density and good performance in open sorption thermal energy storage systems.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Green & Sustainable Science & Technology
Annie Chimphango, Richard Kingsley Padi, Anthony Paul Roskilly
Summary: This study evaluates the economic and environmental performance of cassava waste bioenergy production in seven African countries. The findings suggest that utilizing cassava stems and cassava starch wastewater for bioenergy generation is feasible and has positive impacts on both the economy and the environment.
SUSTAINABLE PRODUCTION AND CONSUMPTION
(2022)
Article
Thermodynamics
Megan Wilks, Chenjue Wang, Janie Ling-Chin, Xiaolin Wang, Huashan Bao
Summary: This study explores the potential of thermochemical adsorption heat storage technology for battery electric vehicle cabin heating. A modular reactor with multiple adsorption units using the SrCl2-NH3 working pair was designed. Numerical models were built to size the system and meet the heating requirement for ambient temperatures ranging from 5-10 degrees C. The simulation results show that the system can satisfy the required supply air temperature by activating different adsorption units based on the detected air temperature.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Multidisciplinary Sciences
Alessandro Giampieri, Yngrid Machado, Janie Ling-Chin, Anthony Paul Roskilly, Zhiwei Ma
Summary: This study investigated the technical and economic performance of conventional and innovative desiccant solutions through moisture sorption analysis in a climatic chamber. The results showed that calcium chloride had the highest moisture desorption capacity and the lowest cost, making it an ideal substitute for conventional desiccant solutions. Ionic liquids, on the other hand, showed high moisture absorption capacity and could be used as additives to significantly increase moisture absorption capacity, making them promising substitutes for conventional desiccant solutions.
Article
Thermodynamics
Ugochukwu Ngwaka, Yousaf Khalid, Janie Ling-Chin, John Counsell, Faisal Siddiqui, Ruben Pinedo-Cuenca, Huda Dawood, Andrew Smallbone, Nashwan Dawood, Anthony Paul Roskilly
Summary: This paper presents an integrated energy system planning tool for decarbonising industrial clusters and validates its effectiveness through a case study. The results show that significant reductions in energy demand, costs, emissions, and energy losses can be achieved through the implementation of different decarbonisation measures.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Green & Sustainable Science & Technology
M. Genovese, F. Piraino, P. Fragiacomo
Summary: This research proposes the concept of a hydrogen valley in southern Italy, where hydrogen is produced centrally and delivered via fuel cell hybrid trains to refueling stations, providing transportation services. The analysis from both technical and economic perspectives shows that the cost of hydrogen and energy efficiency reached competitive levels, and hydrogen rail transport offers significant benefits in terms of emissions reduction and economic gains compared to conventional diesel trains and fully electric trains.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2024)
Review
Green & Sustainable Science & Technology
Miaomiao Liu, Payam Nejat, Pinlu Cao, Carlos Jimenez-Bescos, John Kaiser Calautit
Summary: This article provides a critical review of the performance of windcatchers, pointing out the current research gaps and issues, and proposing directions for further investigation and market prospects.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2024)
Review
Green & Sustainable Science & Technology
Solomon Boadu, Ebenezer Otoo
Summary: Despite Africa's vast energy resources, including wind energy, the continent faces challenges in developing its wind energy industry. Northern African countries and South Africa currently dominate the wind energy sector in Africa. To uplift Africa's socio-economic status, strong political will, supportive policies, and institutional frameworks are needed to drive the development of wind energy and overcome existing challenges.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2024)
Article
Green & Sustainable Science & Technology
E. K. Grubbs, S. M. Gruss, V. Z. Schull, M. J. Gosney, M. V. Mickelbart, S. Brouder, M. W. Gitau, P. Bermel, M. R. Tuinstra, R. Agrawal
Summary: As the global population grows, the demand for food, energy, and water will increase significantly. However, limited land availability and competition for solar resources pose challenges to resource generation technologies. In the United States, both agriculture and solar energy production have adopted densification schemes to improve yields and energy output per unit of land. This research proposes an Agrivoltaic food and energy coproduction architecture that optimizes power generation while maintaining crop productivity by implementing ideal anti-tracking during critical growth periods. This technology offers a viable pathway for widespread solar implementation throughout the contiguous United States.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2024)
Review
Green & Sustainable Science & Technology
Han Shao, Rui Henriques, Hugo Morais, Elisabetta Tedeschi
Summary: The integration of offshore wind energy into the electric grid provides opportunities in terms of environmental sustainability and cost efficiency, but poses challenges to power quality. This survey offers a deeper understanding of disturbance detection and classification tools, exploring root causes, disturbance locations, and algorithmic solutions. It highlights synchronized waveform measurement and discusses evaluation metrics for detection and classification algorithms. Additionally, a novel system-wide monitoring framework is proposed.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2024)
Review
Green & Sustainable Science & Technology
Eleni Davidson, Yair Schwartz, Joe Williams, Dejan Mumovic
Summary: A continued upward trend in global greenhouse gas emissions poses risks to global infrastructure and built assets. Maintaining high indoor environmental quality standards is a challenge for higher education institutions under future climates. Passive cooling mechanisms may be insufficient to tolerate predicted temperature increases. Different building typologies have varying energy demand projections.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2024)
Article
Green & Sustainable Science & Technology
Kexin Pang, Jian Zhou, Stamatis Tsianikas, David W. Coit, Yizhong Ma
Summary: This study proposes a new framework for long-term microgrid expansion planning, using deep reinforcement learning method to consider various uncertainties and constraints. The framework aims to enhance the effectiveness of microgrid expansion planning from the perspectives of economy, resilience, and greenhouse gas emission reduction.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2024)
Article
Green & Sustainable Science & Technology
Jun Zhao, Kangyin Dong, Xiucheng Dong
Summary: The continuous growth of global electricity penetration has provided modern energy for alleviating energy poverty, but its impact on carbon neutrality has been overlooked. The research reveals that clean electricity from traditional fossil energy and renewable energy has a positive influence on the greenhouse effect. Eradicating energy poverty can effectively alleviate the greenhouse effect, especially in non-Belt and Road Initiative (B&RI) nations.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2024)
Review
Green & Sustainable Science & Technology
Hossein Shahbeik, Hamed Kazemi Shariat Panahi, Mona Dehhaghi, Gilles J. Guillemin, Alireza Fallahi, Homa Hosseinzadeh-Bandbafha, Hamid Amiri, Mohammad Rehan, Deepak Raikwar, Hannes Latine, Bruno Pandalone, Benyamin Khoshnevisan, Christian Sonne, Luigi Vaccaro, Abdul-Sattar Nizami, Vijai Kumar Gupta, Su Shiung Lam, Junting Pan, Rafael Luque, Bert Sels, Wanxi Peng, Meisam Tabatabaei, Mortaza Aghbashlo
Summary: This review explores the production of biocrude oil from biomass feedstocks through the process of hydrothermal liquefaction (HTL). It discusses the impact of process parameters on the quality, quantity, cost, and environmental impacts of biofuels. The review also highlights the challenges and prospects for the future development of biocrude oil.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2024)
Article
Green & Sustainable Science & Technology
Meysam Majidi Nezhad, Mehdi Neshat, Georgios Sylaios, Davide Astiaso Garcia
Summary: Digital twins promise innovation for the marine renewable energy sector by using modern technological advances and the existing maritime knowledge frameworks. This research presents critical aspects of digital twin implementation challenges in marine energy digitalization approaches that use and combine data systems.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2024)
Article
Green & Sustainable Science & Technology
Yeganeh Sharifian, Hamdi Abdi
Summary: This paper discusses the background and objectives of the multi-area economic dispatch problem, as well as various techniques and methods applied in this field. It also covers comprehensive formulations of the problem and important issues in the field of probabilistic MAED, along with some related concepts and suggestions.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2024)
Review
Green & Sustainable Science & Technology
J. G. B. Churchill, V. B. Borugadda, A. K. Dalai
Summary: The increasing global energy demand and the need to reduce fossil fuel reliance have created a demand for renewable and sustainable fuel sources. This review explores the potential of tall oil, a by-product of the pulping industry, as a feedstock for biofuels. The review provides an overview of tall oil production, purification, and treatment, and investigates recent trends and barriers towards tall oil-derived biofuels.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2024)
Review
Green & Sustainable Science & Technology
David C. Broadstock, Xiangnan Wang
Summary: This study provides a general review of research on district cooling, identifying key topics and themes and highlighting potential research priorities for future studies.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2024)
Article
Green & Sustainable Science & Technology
L. Scharnhorst, D. Sloot, N. Lehmann, A. Ardone, W. Fichtner
Summary: This study investigates and analyzes the barriers to demand response in industrial and commercial sectors, highlighting their significance. Concerns about diminished product quality, disruptions to production processes, human resource management, and revenue uncertainty are identified as the most frequently cited barriers. Overcoming these barriers requires bridging knowledge gaps, allocating sufficient resources, and adapting external incentives and policies.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2024)
Review
Green & Sustainable Science & Technology
Tong Feng, Yuechi Sun, Yating Shi, Jie Ma, Chunmei Feng, Zhenni Chen
Summary: Air pollution is a significant global challenge, and policymakers have implemented policies to reduce it. Evaluating the effectiveness of these policies is critical, and our study reveals trends and gaps in air pollution policy research. We found that research has shifted from focusing solely on air pollutants to including methodologies, policies, and health implications. China has emerged as a major contributor in this field of research.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2024)
