scholarly journals On the Importance of Nonlinear Aeroelasticity and Energy Efficiency in Design of Flying Wing Aircraft

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Pezhman Mardanpour ◽  
Dewey H. Hodges
Keyword(s):  
Energy Efficiency ◽  
Beam Theory ◽  
Computational Effort ◽  
Solar Panels ◽  
Nonlinear Aeroelasticity ◽  
Finite Rotations ◽  
Lightweight Structures ◽  
Nonlinear Composite ◽  
Aeroelastic Simulations ◽  
Long Endurance

Energy efficiency plays important role in aeroelastic design of flying wing aircraft and may be attained by use of lightweight structures as well as solar energy. NATASHA (Nonlinear Aeroelastic Trim And Stability of HALE Aircraft) is a newly developed computer program which uses a nonlinear composite beam theory that eliminates the difficulties in aeroelastic simulations of flexible high-aspect-ratio wings which undergoes large deformation, as well as the singularities due to finite rotations. NATASHA has shown that proper engine placement could significantly increase the aeroelastic flight envelope which typically leads to more flexible and lighter aircraft. The areas of minimum kinetic energy for the lower frequency modes are in accordance with the zones with maximum flutter speed and have the potential to save computational effort. Another aspect of energy efficiency for High Altitude, Long Endurance (HALE) drones stems from needing to minimize energy consumption because of limitations on the source of energy, that is, solar power. NATASHA is capable of simulating the aeroelastic passive morphing maneuver (i.e., morphing without relying on actuators) and at as near zero energy cost as possible of the aircraft so as the solar panels installed on the wing are in maximum exposure to sun during different time of the day.

MANUFACTURING OF ENERGY EFFICIENT SOLAR PANELS

2020 ◽  
Author(s):  
Андрей Дмитриевич Бухтеев ◽  
Виктория Буянтуевна Бальжиева ◽  
Анна Романовна Тарасова ◽  
Фидан Гасанова ◽  
Светлана Викторовна Агасиева
Keyword(s):  
Energy Efficiency ◽  
Solar Cells ◽  
Energy Efficient ◽  
Solar Panels

В данном обзоре приведены проблемы при использовании солнечных элементов и существующие решения этих проблем по повышению энергоэффективности фотоэлементов. Также сравнивается КПД этих солнечных элементов и рассматриваются их особенности. Одним из самых эффективных способов стало применение нанотехнологий. This review presents the problems of using solar cells and existing solutions to these problems to improve the energy efficiency of solar cells. The efficiency of these solar cells is also compared and their features are considered. One of the most effective methods was the use of nanotechnology.

scholarly journals Improving the energy efficiency of using solar panels

2020 ◽  
Vol 613 ◽  
pp. 012092
Author(s):  
G V Nikitenko ◽  
E V Konoplev ◽  
V K Salpagarov ◽  
I V Danchenko ◽  
G V Masyutina
Keyword(s):  
Energy Efficiency ◽  
Solar Panels

Riqualificazione energetica e bioedilizia in Italia: lo stato dell'arte

2012 ◽  
pp. 74-88
Author(s):  
Livio de Santoli
Keyword(s):  
Energy Efficiency ◽  
Renewable Energy ◽  
Energy Consumption ◽  
Fossil Fuels ◽  
Building Materials ◽  
Heat Pumps ◽  
Building Envelope ◽  
International Standards ◽  
Solar Panels ◽  
Water Heaters

Building sustainability, in term of energy efficiency, low-impact building materials, renewable energy, has experienced significant growth during the past years. In response to the growing dependence on fossil fuels and importations, due in part to the increase of energy consumption in the residential sector (in 2009 46,9 Mtep, 3% more than 2008) and the recent European directives (i.e. EU 2009/28/CE) requiring CO2 emissions cut of up to 13% in 2020, there is interest in promoting energy efficiency and renewable energy technologies, which are suitable for residential applications. In this paper we present an overview on actions related to minimization of buildings energy consumption in Italy. Prevalent line of action is to improve the energy performances of building envelope (Dlgs 192/05) using insulated frames, walls and roofs and replacing heat generators with condensing boilers. In addition to national directives, ONRE Report 2011 (National Observatory on building regulations) shows that 831 Municipalities (10% more than 2010) establish mandatory targets for insulation, photovoltaic solar panels, solar water heaters, heat pumps use, correct buildings orientation, saving of water resource and local materials use. In addiction an efficient energy rating of the buildings could promote the spread of energy efficiency measurement and consequently facilitate their implementation. The new energy rating system should meet international standards, regarding environment and energy aspects, and respect territorial needs.

scholarly journals GBT-Based Buckling Analysis Using the Exact Element Method

2017 ◽  
Vol 17 (10) ◽  
pp. 1750125 ◽  
Author(s):  
Rui Bebiano ◽  
Moshe Eisenberger ◽  
Dinar Camotim ◽  
Rodrigo Gonçalves
Keyword(s):  
Finite Elements ◽  
Beam Theory ◽  
Computational Effort ◽  
Power Series Method ◽  
Half Wave ◽  
Governing Differential Equation ◽  
Exact Element Method ◽  
Deformation Modes ◽  
Element Method

Generalized Beam Theory (GBT), intended to analyze the structural behavior of prismatic thin-walled members and structural systems, expresses the member deformed configuration as a combination of cross-section deformation modes multiplied by the corresponding longitudinal amplitude functions. The determination of the latter, usually the most computer-intensive step of the analysis, is almost always performed by means of GBT-based conventional 1D (beam) finite elements. This paper presents the formulation, implementation and application of the so-called “exact element method” in the framework of GBT-based linear buckling analyses. This method, originally proposed by Eisenberger (1990), uses the power series method to solve the governing differential equation and obtains the buckling eigenvalue problem from the boundary terms. A few illustrative numerical examples are presented, focusing mainly on the comparison between the combined accuracy and computational effort associated with the determination of buckling solutions with the exact and standard GBT-based (finite) elements. This comparison shows that the GBT-based exact element method may lead to significant computational savings, particularly when the buckling modes exhibit larger half-wave numbers.

scholarly journals Geometric Method for Estimating Shading Degree of Objects in Solar Industry

2021 ◽  
Author(s):  
Leonid Markin ◽  
Lyudmila Bobrik
Keyword(s):  
Energy Efficiency ◽  
High Speed ◽  
Life Support ◽  
Geometric Model ◽  
Clean Energy ◽  
Effective Area ◽  
Solar Panels ◽  
Processor Time ◽  
And Performance ◽  
Problem Setting

The paper presents a geometric model for evaluating the effective area of photovoltaic solar panels, taking into account their shading cast upon the object when it is exposed to a solar flux directed as it has been set. The relevance of such research is due to the fact that solar energy is a source of ecologically clean energy on earth, in space - it is often the only source of life support for inhabited space stations and future extraterrestrial settlements. It describes problem setting, namely physical and mathematical approaches to evaluating energy efficiency of pho- tovoltaic solar panels. To estimate energy efficiency, we have chosen a voxel geometric model which samples the normal working area. The developed voxel geometric model differs from others significantly, namely it employs 4-digit code instead of 2-digit. Such multi-digit feature allows the solving algorithm to “trace” the shade source quickly when calculating the total effective area of photovoltaic solar panels. The paper presents the software implementation of the described geometric model, the graphical shell, and the results of verification of the afore- said geometric model. The results of its testing (estimates of accuracy and performance) are given. This results showing sufficient accuracy for practice and high speed of calculations (less than 10 seconds of processor time).

Smart heating panels to increase thermal comfort and efficiency

Work ◽  
2021 ◽  
Vol 68 (s1) ◽  
pp. S29-S35
Author(s):  
Damian Backes ◽  
Marten Trenktrog ◽  
Lutz Eckstein
Keyword(s):  
Energy Efficiency ◽  
Thermal Comfort ◽  
Energy Savings ◽  
Heating System ◽  
High Energy ◽  
Computational Effort ◽  
Fast Time ◽  
Body Regions ◽  
Driving Range ◽  
High Energy Efficiency

BACKGROUND: The increasing electrification poses new challenges with respect to thermal comfort in vehicle passenger cabins. While conventional air heating with electric heaters is technically possible, it causes significant reductions in the electric driving range. OBJECTIVE: Two contradicting objectives are to be achieved: Fast heat up to provide thermal comfort and high energy efficiency to maximize the driving range under all conditions. METHODS: This apparent area of conflict can be eased by the usage of low temperature radiation reducing the energy intensive heat up of the cabin air. In order to provide high energy efficiency, the emitted radiation should mostly be directed towards relevant body regions of the passengers, resulting in the necessity to redesign the passenger cabin. RESULTS: A novel approach to redesign and optimize the dashboard and a resulting radiation heating system are presented. In order to reduce computational effort of such an optimization, the complex three-dimensional geometry is sliced into simplified two-dimensional regions which are considered individually. The resulting heating system has been manufactured and integrated into a class A vehicle. Objective thermal comfort measurements as well as subjective comfort ratings have been conducted to validate the simulative approach and the resulting energy savings of approximately 30 %. CONCLUSIONS: The developed approach to achieve a fast time to comfort as well as an increased energy efficiency shows promising results as the heating system based on it cuts performs well considering objective and subjective measurements.

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