Article
Energy & Fuels
Kristian Culik, Vladimira Stefancova, Karol Hrudkay, Jan Morgos
Summary: This paper focuses on statistical evaluation of various operating characteristics of electric buses using practical data. It highlights the significant impact of temperature on electricity consumption, accurately identifying this effect through correlation analysis and defining the relationship between energy loss from the battery and driving power using regression analysis. It also includes a practical example of using ANOVA analysis to identify statistically significant effects of specific vehicles on average consumption, as well as comparing different types of electric buses in operation.
Article
Energy & Fuels
Matthias Steinstraeter, Johannes Buberger, Katharina Minnerup, Dimitar Trifonov, Patrik Horner, Bastian Weiss, Markus Lienkamp
Summary: Short range remains a major disadvantage for battery electric vehicles compared to combustion engine vehicles. This paper focuses on the development and comparison of strategies to control the vehicle's heating circuit in order to minimize range losses. The results show that fuzzy logic leads to the greatest improvement in range and battery lifetime.
Article
Thermodynamics
P. Ganesh Kumar, K. Balaji, D. Sakthivadivel, V. S. Vigneswaran, R. Velraj, Sung Chul Kim
Summary: This paper presents an innovative hybrid system for heating air and water simultaneously, utilizing nanofluids and surface roughened materials to enhance thermal performance. Experimental results show that the efficiency of the system is directly proportional to the volume percentage of nanomaterials.
Article
Nanoscience & Nanotechnology
Yuan Yao, Caiyun Chang, Hao Sun, Di Guo, Rongrong Li, Xiong Pu, Junyi Zhai
Summary: In this study, hollow polar nickel selenide (Ni3Se4) with abundant adsorptive and electrocatalytic sites was designed and employed as a carbon-free sulfur immobilizer to enhance the volumetric energy density of lithium sulfur batteries. The Ni3Se4-based sulfur electrode exhibited excellent rate endurability and cycle stability, with a nearly 2.8 times higher volumetric specific capacity compared to carbonaceous electrodes.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Computer Science, Information Systems
Enielma Cunha da Silva, Ozy D. Melgar-Dominguez, Ruben Romero
Summary: This study presents a strategy for estimating the maximum penetration levels of renewable-based distributed generation and electric vehicles into an electric distribution system from the perspective of the distribution system operator. By managing operational resources and utilizing optimization models, higher penetrations of renewable-based distributed generation and electric vehicles can be accommodated without impacting the safe operation of the system.
Article
Chemistry, Multidisciplinary
Shanqing Liang, Huicong Wang, Xin Tao
Summary: A flexible low-voltage biomass matrix electric-heating composite was fabricated using ultrasonic dispersion and suction filtration, incorporating graphene oxide and cationic cellulose nanofiber. The introduction of graphene oxide increased thermal stability while decreasing tensile strength and strain of the films. Additionally, the electrical conductivity and power density of the films were significantly improved with increasing graphene oxide content, showcasing rapid temperature attainment and excellent electric heating response capabilities.
Article
Energy & Fuels
Zhe Chen, Charalampos Ziras, Henrik W. Bindner
Summary: In this study, a model is developed to analyze the impact of capacity limitation services on network states from the aggregator's perspective. The evaluation framework coordinates various modules by assessing these services under different scenarios. Simulation results demonstrate the effectiveness of the proposed model and a associated procedure is designed to offer distribution system operators valuable insights into system behavior.
SUSTAINABLE ENERGY GRIDS & NETWORKS
(2023)
Article
Engineering, Electrical & Electronic
Y. Chen, A. Iradukunda, H. A. Mantooth, Z. Chen, D. Huitink
Summary: Transportation electrification and grid modernization efforts require power electronic converters, motor drives, and protection systems to meet stringent requirements for power densities. This article provides a tutorial on designing and realizing high-power modules, using the PowerAmerica (PA) module challenge as an example. It discusses the application-driven development process, challenges in multidimensional design, and technologies and strategies for high-power, high-density module realization. The knowledge shared can facilitate the prototype development of new power modules.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2023)
Article
Energy & Fuels
Bruno Eduardo Carmelito, Jose Maria de Carvalho Filho
Summary: This study presents a new methodology for calculating the hosting capacity of electric vehicles (EVs) in low- and medium-voltage distribution systems, and applies it through a case study. The proposed methodology combines deterministic and stochastic methods, considers multiple operational criteria, and is applicable in both low and medium voltage. The results show that the hosting capacity of EVs for the transformers in the distribution system under study reaches 100% in more than 50% of the simulations. The main limiting factor is conductor overload, accounting for 36.69% violations for the 3.6 kW charger and 52.14% for the 7 kW charger. Based on the evaluated projections, the distribution system is capable of accommodating the growth of EVs until 2025 for the 3.6 kW charger in any of the scenarios presented in this study.
Article
Thermodynamics
Matthew Gough, Kush Rakhsia, Tiago Bandeira, Hugo Amaro, Rui Castro, Joao P. S. Catala
Summary: This paper presents an innovative design and implementation of an easy-to-use device for intelligent residential water heating, using machine learning techniques to forecast hot water demand and optimize the operation of an electric water heater based on non-intrusive vibration data. The device achieved an average reduction of 35.5% in water heating costs, equivalent to 1.33 kWh/day per consumer, and a decrease of 0.21% in total electricity usage. It also reduced thermal generation by 0.37% and emissions by 693.31 tons of CO2 per year.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Environmental Studies
J. H. Giliomee, M. J. Booysen
Summary: The expected electrification of Sub-Sahara Africa's urban paratransit with an electric minibus taxi (eMBT) has gained attention. To address the long charging time of eMBTs, a battery swapping approach and solar charging station are proposed, resulting in a 6% trip time increase but a 75% reduction in emissions. The use of a trailer battery enables viable long-distance electrical paratransit, making the transition sustainable.
TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT
(2023)
Article
Engineering, Multidisciplinary
S. M. Shafaei, H. Mousazadeh
Summary: This study investigates the power performance of an unmanned robotized vehicle for industrial transportations of payloads, providing an applied research. It is the first comprehensive investigation of power efficiencies of the vehicle, including tractive, slip, and motion power efficiencies. The results show that tire air pressure and payload weight significantly affect motion and slip power efficiencies, while tractive power efficiency mainly depends on payload weight. The study provides numerical and analytical descriptions of the results, as well as practical suggestions for optimizing power performance.
Article
Environmental Sciences
Juliana May Sangoi, Taylana Piccinini Scolaro, Enedir Ghisi
Summary: This work aims to analyze the performance of different water heating systems compared to electric showers, especially in terms of energy consumption and efficiency. The results showed that solar heaters combined with gas heaters are a low energy consumption alternative. However, electric showers are the most efficient option for larger buildings and cold-climate cities.
Article
Engineering, Mechanical
Lichao Han, Shuangquan Shao, Zhichao Wang, Qiang Yang, Zhaowei Xu, Jiandong Li, Xiaoxi Gou, Jinpeng Suo
Summary: This study proposes a novel method for measuring the heating capacity of air source heat pumps. By installing an auxiliary electric heater and calculating the refrigerant mass flow rate based on energy conservation, the heating capacity can be accurately calculated. The experimental results show that this method has a high level of accuracy and has a minimal impact on the heating capacity of the heat pumps.
FLOW MEASUREMENT AND INSTRUMENTATION
(2022)
Article
Thermodynamics
Maria Sandstrom, Pei Huang, Chris Bales, Erik Dotzauer
Summary: The deployment of electric vehicles (EVs) is increasing, posing stress on power grids in Sweden. This study investigates the impact of EV charging on a Swedish residential power grid using real-life EV charging data. They estimate the local grid hosting capacity (HC) for EVs and analyze different charging strategies and EV penetration levels.
Article
Energy & Fuels
Myeong Hyeon Park, Sung Chul Kim
Article
Green & Sustainable Science & Technology
Mohammad Salman, Myeong Hyeon Park, Ranchan Chauhan, Sung Chul Kim
Summary: The experimental study investigated the impact of indented dimple roughness on convective heat transfer and airflow characteristics on the absorber plate of an impingement jet solar heat collector. The experimental results showed that the Nusselt number for the indented dimples was significantly higher than for a smooth plate, with the maximum thermohydraulic performance enhancement value occurring at specific parameters.
