Thermodynamics and energy usage of electric vehicles
Calculations were performed for the energy requirements of a typical sedan-style EV with the characteristics of the vehicle in Fig. 1, Fig. 2, when the difference between the interior cabin and ambient is 25 K.The results of the calculations are shown in Fig. 3, which depicts the power requirements when zero heat is supplied (Q = 0) and also when
Exhaustive Modeling of Electric Vehicle Dynamics, Powertrain and Energy Storage/Conversion for Electrical Component Sizing and Diagnostic
The forces acting on a vehicle moving up a grade includes tire rolling resistance, aerodynamic drag, and uphill resistance. The traction force of a vehicle can be described by Eq. (), where F t is the traction force, α is the angle of the driving surface, M is the mass of the vehicle, V is the velocity of the vehicle, a is the acceleration of the vehicle, g is the
An overview of electricity powered vehicles: Lithium-ion battery energy storage density and energy conversion efficiency
This paper presents an overview of the research for improving lithium-ion battery energy storage density, safety, and renewable energy conversion efficiency. It is discussed that is the application of the integration technology, new power semiconductors and multi-speed transmissions in improving the electromechanical energy conversion
Mobile energy recovery and storage: Multiple energy-powered
Limited energy efficiency associated with energy recovery, conversion, storage and utilization technologies; The lack of existing infrastructure and services for multi-vector energy EV charging. Associated with the second challenge above, there is a need for access to rapidly updated information via GPS or mobile apps to locate the
Modelling and experimental validation of advanced adiabatic compressed air energy storage
Advanced adiabatic compressed air energy storage (AA-CAES) has been recognised as a promising approach to boost the integration of renewables in the form of electricity and heat in integrated energ
Nature-resembled nanostructures for energy storage/conversion
Abstract. Nature-inspired nanomaterial is one of the well-investigated nanostructures with favorable properties exhibiting high surface area, more active sites, and tailorable porosity. In energy storage systems, nature-inspired nanomaterials have been highly anticipated to obtain the desired properties. Such nanostructures of nature-inspired
Aerodynamic efficiency of flapping flight: analysis of a two-stroke
SUMMARY. To seek the simplest efficient flapping wing motions and understand their relation to steady flight, a two-stroke model in the quasi-steady limit was analyzed. It was found that a family of two-stroke flapping motions have aerodynamic efficiency close to, but slightly lower than, the optimal steady flight. These two-stroke
Multi-point aerodynamic optimization of the rotor blade sections of an axial-flow impulse air turbine for wave energy conversion
The sharp drop in aerodynamic efficiency above a critical flow rate and the high-level of noise generation are well-known shortcomings of the Wells turbine [10], [11]. These effects are a consequence of the inherent use of uncambered blade sections which leads to high suction peaks and hard stall at high flow incidences.
A comprehensive study of renewable energy sources:
The energy conversion efficiency of combustion and the energy utilization ability of biomass depends on several variables such as combustion method, type of biomass, and scale application. Table 8 shows three different methods of combustion for electricity generation, which are similar for coal, which are grate firing (GF), pulverized
Thermodynamic analysis of energy conversion and transfer in
A simulation model consisting of wind speed, wind turbine and AA-CAES (advanced adiabatic compressed air energy storage) system is developed in this paper,
Simulation and experimental research on energy conversion efficiency of scroll expander for micro‐Compressed Air Energy Storage
The experiments show that the energy conversion efficiency varies from 23% to 36% at the air supply pressure of 0.35 to 0.65 MPa, indicating that it is proportional to the air supply pressure. It can also be concluded from the experiments that when the air pressure is higher than 0.45 MPa, the ideal ratio range can be determined as 0.6-0.8.
Multifunctional composite designs for structural energy storage
Their energy storage relies on the reversible oxidation–reduction reactions of lithium and the lithium-ion couple (Li/Li +) to store energy. Typically, metal oxide (LiMO 2, M = Co, Ni, Mn) or metal phosphate (LiFePO 4 ) are used as active material in the cathode, while the anode is composed of electrode material like graphite, silicon, or other
Review and prospect of compressed air energy storage system
Compressed air energy storage (CAES) is a promising energy storage technology due to its cleanness, high efficiency, low cost, and long service life. This
Search Our Programs | arpa-e.energy.gov
The projects that make up ARPA-E''s ADEPT program, short for "Agile Delivery of Electrical Power Technology," are paving the way for more energy efficient power conversion and advancing the basic building blocks of power conversion: circuits, transistors, inductors, transformers, and capacitors. Status: Alumni.
Effects of multilayer porous ceramics on thermochemical energy conversion and storage efficiency
Changes in porosity can cause complicated variations in the flow field and temperature field, thereby affecting the final conversion and energy storage efficiency [45], [47]. Figs. 12 and 13 indicate the variations in CH 4 /CO 2 conversions and H 2 /CO yields, respectively, upon increasing the porosity from 0.70 to 0.90.
Functionally constructed mineral microspheres for efficient photothermal conversion and thermal energy storage
The prepared P-AEG-C exhibited superior mechanical properties and thermal energy storage properties, with a compressive strength of 14.8 MPa and light–thermal conversion efficiency of 92%. Therefore, the synthesized P-AEG-C has potential in light–thermal conversion applications and energy-saving buildings.
Optimization and control strategy for wind turbine aerodynamic performance under uncertainties | Journal of Renewable and Sustainable Energy
Aerodynamic performance of wind turbine governs the overall energy efficiency, which has been an ever-lasting research focus in the field of wind power technolo Hongyan Tian, Zhihao Tang, Heng Ouyang, Rong Wang, Fang Wang, Shuyong Duan; Optimization and control strategy for wind turbine aerodynamic performance
Aerodynamic Perspectives on Wind Energy Efficiency
2019-05-06. This thesis investigates the efficiency of wind energy conversion from three aerodynamic perspectives. The first, purely theoretical, assumes steady inviscid flow conditions to identify multi-rotor setups that can extract more power per unit area than isolated rotors. The second, more practical perspective, assesses the extent to
Graphene aerogels for efficient energy storage and conversion
Concerns over air quality reduction resulting from burning fossil fuels have driven the development of clean and renewable energy sources. Supercapacitors, batteries and solar cells serve as eco-friendly energy storage and conversion systems vitally important for the sustainable development of human society.
Effect of Aerodynamics on Wind Turbine Design
Summary The huge potential of wind energy to generate power has made the study of wind turbines very exciting. Wind turbines should be designed in such a way that they can
Aerodynamic performance and flow characteristics of a
A better air distribution mode in compressed air energy storage system is proposed. • The average specific power is increased by 6.8 % with nozzle governing. •
Making the Most of the Energy We Have: Vehicle Efficiency
With global concerns over emissions from non-renewable sources and its dwindling global supplies. Optimization of our energy usage is highly important. Converting energy to various forms is usually an imperfect process with energy being wasted. Vehicle''s convert on-board stored energy to a kinetic form to drive a vehicle. Understanding the
Energy Conversion and Management | Vol 302, 15 February
Thermodynamic analysis of a synergistic integration of solid oxide fuel cell and solar-based chemical looping methane reforming unit for solar energy storage, power production, and carbon capture. Salvatore F. Cannone, Muhammad Ishaq, Andrea Lanzini, Massimo Santarelli. Article 118080.
Energy storage systems: a review
The PHES research facility employs 150 kW of surplus grid electricity to power a compression and expansion engine, which heats (500 °C) and cools (160 °C)
Review on heat-to-power conversion technologies for hypersonic
Converting the tremendous high-quality heat on the vehicle surface and engine wall into electrical energy through heat-to-power technologies will not only play a role in thermal protection, but also supply power for the vehicle. This paper provides a comprehensive review of heat-to-power conversion technologies on hypersonic vehicles,
Wind Energy Conversion Systems: A Review on Aerodynamic,
Wind turbine models and classifications, applications of various types of wind generators, requirements and demands of power electronics technologies on WECS
Design optimization of hydraulic energy storage and conversion
This paper focuses on the design optimization of a Hydraulic Energy Storage and Conversion (HESC) system for WECs. The structure of the HESC system and the mathematical models of its key components are presented. A case study and design
Energy Storage
Energy Storage provides a unique platform for innovative research results and findings in all areas of energy storage, including the various methods of energy storage and their incorporation into and integration with both conventional and renewable energy systems. The journal welcomes contributions related to thermal, chemical, physical and
Advances in 2D/2D MXenes-based heterostructures for energy storage/conversion
MXene-based 2D heterostructures have emerged as a highly promising area of research in the field of energy storage and conversion, owing to their exceptional properties and versatility. This comprehensive review aims to highlight the recent advancements and challenges associated with tailoring MXene-based heterostructures.
Sustainable aircraft design — A review on optimization methods for electric propulsion with derived optimal
The energy balance from the tank to all N propellers reads (14) η 0 P = N P s = N T M Ω = N I b m Ω, where we denote the shaft power of a single propeller with P s and the efficiency of the power conversion from the energy storage to the shaft with η
How Do Wind Turbines Work? | Department of Energy
A wind turbine turns wind energy into electricity using the aerodynamic force from the rotor blades, which work like an airplane wing or helicopter rotor blade. When wind flows across the blade, the air pressure on one side of the blade decreases. The difference in air pressure across the two sides of the blade creates both lift and drag.
Energy Conversion and Storage Requirements for Hybrid Electric
114 passengers, all electric, design range of 2400 nautical miles, Li-Air battery energy density – 2000 watt-hour/kg. Air 11.38%%. Battery 29.64%. Gross takeoff weight = 59786 kg. Maximum landing weight = 67464 kg. Fuel 21.67%. Gross takeoff weight = 52300 kg. Maximum landing weight = 40400 kg. Work from Stanford University (Vegh and Alonso
Aircraft thermal management: Practices, technology, system architectures
It results in increased component operating temperatures and losses in fuel conversion efficiency. As an example of the effects of heat soakage, in gas turbines, it can amount to about 30% of the excess fuel energy in an
