Designing Resource-Efficient Military Base Camps From a Holistic Perspective

Author(s):  
Nathan H. Putnam ◽  
Carolyn C. Seepersad ◽  
Michael E. Webber

The U.S. Department of Defense (DoD) has recently shown an interest in incorporating resource efficiency into decision-making processes, including decisions that pertain to Forward Operating Military Base Camp (FOB) equipment. Often deployed in environments without access to grid utilities, FOBs require costly deliveries by land or air of resources such as fuel and fresh water. Resource-efficient FOB designs have the potential to reduce supply costs, but competing objectives and uncertain operational conditions complicate the design process. For example, integration of solar photovoltaic panels into existing designs has the potential to reduce the need to burn fuel in generators, however solar panels have up-front logistical and monetary costs that limit widespread use. There are also uncertainties associated with available solar energy and camp electrical loads. The research described here uses computer modeling and simulation of a real FOB subsystem under different operational scenarios to develop configurations of solar panels and batteries that, when integrated with an existing FOB design, maximize resource savings but minimize logistical and monetary costs, showing the benefit of a holistic design strategy that accounts for scenario variation. This research will also show that while different hardware configurations prove most efficient under different scenarios and objectives, certain hardware configurations provide good performance under all scenarios and objectives.

Author(s):  
Rahul Bisht ◽  
Afzal Sikander

Purpose This paper aims to achieve accurate maximum power from solar photovoltaic (PV), its five parameters need to be estimated. This study proposes a novel optimization technique for parameter estimation of solar PV. Design/methodology/approach To extract optimal parameters of solar PV new optimization technique based on the Jellyfish search optimizer (JSO). The objective function is defined based on two unknown variables and the proposed technique is used to estimate the two unknown variables and the rest three unknown variables are estimated analytically. Findings In this paper, JSO is used to estimate the parameters of a single diode PV model. In this study, eight different PV panels are considered. In addition, various performance indices, such as PV characteristics, such as power-voltage and current-voltage curves, relative error (RE), root mean square error (RMSE), mean absolute error (MAE) and normalized mean absolute error (NMAE) are determined using the proposed algorithm and existing algorithms. The results for different solar panels have been obtained under varying environmental conditions such as changing temperature and constant irradiance or changing irradiance and constant temperature. Originality/value The proposed technique is new and provides better results with minimum RE, RMSE, NMAE, MAE and converges fast, as depicted by the fitness graph presented in this paper.


2021 ◽  
Author(s):  
James Bushong

This paper proposed a 4-dimensional approach to solar photovoltaic energy, featuring a 3-D porous metal cell with a continuous flow of photovoltaic fluids (e.g. Colloidal Quantum Dots or perovskites) traversing throughout. Rationale and proposed governing equations indicate that significantly more power per unit 2-D panel area could be achieved, offering a method of de facto overcoming power limitations such as Shockley-Queisser and recombination in conventional 2-D passive solar panels. The main goal is to initiate thought and collaboration with experts in electrical engineering, physics, colloidal quantum dots, perovskites, capacitors/batteries, and any other related field that could help this approach become a commercial reality if there is a market fit. Potential applications include those where maximum solar power is desired yet space is limited- such as an on-board solar panel for electric vehicles.


2014 ◽  
Vol 1049-1050 ◽  
pp. 573-577
Author(s):  
Zhi Peng Yao

In consideration of the generated energy per unit area as large as possible and the expense of generated energy per unit as low as possible, this paper has proposed optimization selection method for the types of solar panels about six surfaces of the single house which receive solar radiation,the solar panels series and parallel connection and the invertors. The final laying scheme has been obtained through the synthetical evaluation of the optimization results about six surfaces .


Subject The outlook for the solar photovoltaic sector in China. Significance The EU's decision last month to remove tariffs on imported Chinese solar panels follows a US move to increase tariffs. It also comes at a time when international prices for panels are falling in response to a reduction of subsides for the deployment of solar photovoltaic (PV) capacity in China. Impacts Falling prices will stimulate further installation of solar PV capacity across the world, especially in sunny regions. Chinese manufacturers will further expand their capacity both at home and abroad. Non-Chinese PV manufacturers will find their profits squeezed even further unless they are protected by import controls. The rate of deployment of new solar PV capacity within China will decline, but still remain substantial.


Author(s):  
Nildia Mejias-Brizuela ◽  
Rosa Brión-González ◽  
Arturo Ramírez-Lugo ◽  
Eber Orozco-Guillén

We present the design of a prototype solar photovoltaic system interconnected to the electrical network based the Standard CONOCER Mexico EC 0586.01 with which students from Polytechnic Universities and other education institutes technological of renewable energy acquire the theoretical-practical knowledge of photovoltaic technology, for so that students professionals more competitive. The prototype is designed using SolidWorks® software, is design for small space by the dimensions that have and is easy transportation because it does not weigh. The implementation consist in connections between components and the corresponding connections to the electrical grid and determine the acceptance by users through questionnaires applied. The characterization consist in acquired real-time physical and electrics parameters by computational tool designed, the graphs of characteristic curves of solar panels as function of solar irradiance and graphics of energy production of the photovoltaic system. Finally the use of the electricity network to supply an electric demand not covered by the prototype of grid interconnected photovoltaic system.


2021 ◽  
Vol 17 ◽  
pp. 360-370
Author(s):  
Engy Elshazly ◽  
Ahmed Α. Abd El-Rehim ◽  
Amr Abdel Kader ◽  
Iman El-Mahallawi

The trend for integrating solar Photovoltaic Panels as an alternative renewable and sustainable energy source is growing in Egypt, North Africa and the Middle East. However, these efforts are not widely accepted by the society due to their lower efficiencies. The efficiency of the photovoltaic panels is affected by many environmental parameters, which have a negative impact on system efficiency and cost of energy, dust and increased panel temperatures being the most serious. This work presents the results of a case study conducted at The British University in Egypt at El-Sherouk city to study the effect of different parameters such as dust accumulation, water cooling and coating on their performance of both mono- and poly-crystalline panels at El-Sherouk City. The effects of high temperature and dust accumulation on different solar panels placed in natural outdoor conditions at El-Sherouk City were studied and the electrical performance of dusted, cleaned, and cooled PV panels is presented. The variation in the efficiency of mono-crystalline panels installed at different tilt angles, resulting from the accumulation of dust on their surface, was also studied. The results showed that the accumulation of dust on the surface of different types of solar panels can reduce the efficiency by 30%. While the high temperature can reduce the efficiency by up to 10 %. The results showed that the power reduction percentage was 17%, 20%, 25%, 27% and 30% for tilt angles 60°,45°,30°,15° and 0°; respectively. Tilt angles 15° and 30° showed to be optimal for the installation of the PV solar system, as they resulted the highest amount of output power


2021 ◽  
Vol 335 ◽  
pp. 03002
Author(s):  
Chong Jia Joon ◽  
Kelvin Chew Wai Jin

Solar photovoltaic (PV) panels have been widely used to convert the renewable energy from the sun to electrical energy to power electrical loads but suffers from relatively low efficiency between 15% to 22%. Typically, the panels have an average lifespan of 25 to 30 years but could degrade quicker due to the panel overheating. Beyond the optimum working temperature of 25°C, a drop of efficiency by 0.4 to 0.5% for every 1°C had been reported. For solar PV applications in urban regions, passive cooling is beneficial due to limited amount of space and lower energy consumption compared to active cooling. A solar PV system with augmented cooling was conducted at a balcony of a condominium from 10am until 2pm. The solar PV system consisted of an Arduino controller, solar panel module, temperature sensor and LCD monitor. Reusable cold and hot gel packs were attached to the bottom of the solar PV. Both setups of solar PV panel with and without the cooling system were placed at the balcony simultaneously for measurement of temperature, output voltage and current. From this research, the outcome of implementing a cooling system to the solar PV increases the efficiency of the energy conversion.


First Monday ◽  
2005 ◽  
Author(s):  
Joshua Pearce

Although tremendous progress has been made in improving the conversion of sunlight into electricity with solar photovoltaic cells, their widespread adoption is primarily limited by high costs. This paper explores the use of the Internet as a catalyst for the diffusion of solar photovoltaic technology by reducing market risk. With market risk minimized by a database generated by a community of pledged consumers, solar cell companies would be motivated to construct a "Solar City Factory." Such a factory would produce solar panels that would enable systems costs to drop below US$1 per Watt and thus be less expensive than fossil fuels in providing bulk electricity. This price would have a positive–spiral effect encouraging many consumers to switch to solar electricity and transition the global energy infrastructure to renewable solar energy.


Author(s):  
Aklilu T. G. Giorges ◽  
Guillermo J. Amador ◽  
Kevin Caravati ◽  
Joseph Goodman

Significant cost reductions for solar photovoltaic systems can be realized through aerodynamic design improvements for ground mounted and rooftop installations. Current practices in the solar industry are based on ASCE-7 codes created for buildings and do not fully account for wind reduction strategies. Numerical simulation is one of the tools that can be used to evaluate wind loads and improve system designs while maintaining reliability and durability. As a first order analysis, we have numerically simulated a solar photovoltaic panel as a flat plate with an aspect ratio of 0.5, which includes the simulation of turbulence experienced by panels. The flow is simulated using the incompressible Navier-Stokes equation and the turbulent process is simulated using k–ε model. The numerical model and boundary conditions are derived from similar experimental wind tunnel experiments. The aerodynamic force is calculated from the integration of the normal and tangential pressure forces. The result of the numerical simulation shows that the wind load on a solar panel can be successfully simulated numerically and the simulation data can be used to evaluate redesigns of the system, allowing for the effective customization of solar arrays based on local conditions.


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