scholarly journals ANN Modeling and experimental study of the effect of various factors on solar desalination

2020 ◽  
Author(s):  
Ali Bagheri ◽  
Nadia Esfandiari ◽  
Bizhan Honarvar ◽  
Amin Azdarpour
Keyword(s):  
Experimental Data ◽  
Water Desalination ◽  
Solar Panels ◽  
Ann Modeling ◽  
Solar Desalination ◽  
Maximum Water ◽  
Basin Water ◽  
Novel Method ◽  
Desalination Plants ◽  
Parabolic Collector

Abstract This study investigated a novel method for increasing desalinated water mass in solar desalination plants. For this purpose, solar panels and a cylindrical parabolic collector (CPC) were used to raise basin water temperature. The effect of different components of basin solar still on freshwater mass was also investigated. The aluminum basin has been associated with maximum water desalination among the different materials constituting a basin. The effects of different colors (e.g. black, brown, and red) on the basin, as well as different water depths (5, 10, and 15 mm), were also explored. The highest amount of freshwater in the black aluminum basin at a 5-mm water depth was 2.97 kg/day. ANN modeling was employed to validate the experimental data, indicating good compliance of experimental data with ANN prediction. According to the results of the simulation with varying numbers of neurons (n = 2–25), the highest and lowest agreement between experimental data and ANN prediction data were related to 24 and 10 neurons, respectively. Under optimum conditions, R2 and %AAD error were 0.993 and 2.654, respectively.

scholarly journals A New Model Approach for Convective Wall Heat Losses in DQMOM-IEM Simulations for Turbulent Reactive Flows

2018 ◽  
Vol 141 (5) ◽  
Author(s):  
Yeshaswini Emmi ◽  
Andreas Fiolitakis ◽  
Manfred Aigner ◽  
Franklin Genin ◽  
Khawar Syed
Keyword(s):  
Experimental Data ◽  
Heat Losses ◽  
Reacting Flow ◽  
Jet Flame ◽  
New Model ◽  
Turbulent Reactive Flows ◽  
Novel Method ◽  
The One ◽  
The Impact ◽  
Model Approach

A new model approach is presented in this work for including convective wall heat losses in the direct quadrature method of moments (DQMoM) approach, which is used here to solve the transport equation of the one-point, one-time joint thermochemical probability density function (PDF). This is of particular interest in the context of designing industrial combustors, where wall heat losses play a crucial role. In the present work, the novel method is derived for the first time and validated against experimental data for the thermal entrance region of a pipe. The impact of varying model-specific boundary conditions is analyzed. It is then used to simulate the turbulent reacting flow of a confined methane jet flame. The simulations are carried out using the DLR in-house computational fluid dynamics code THETA. It is found that the DQMoM approach presented here agrees well with the experimental data and ratifies the use of the new convective wall heat losses model.

scholarly journals COMPARATING ANALYSIS OF COORDINATE SEARCH METHODS EFFICIENCY FOR THE OPTIMAL SOLAR PANEL POSITION FINDING

2019 ◽  
pp. 77-84
Author(s):  
M. O. Slabinoga ◽  
N.B. Klochko ◽  
O. S. Krynytskyi ◽  
Yu. M. Kuchirka
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Solar Panel ◽  
Surveillance Systems ◽  
Solar Panels ◽  
Search Methods ◽  
Optimal Position ◽  
Advantages And Disadvantages ◽  
Rosenbrock Method ◽  
Efficiency Of Algorithms

The work is devoted to the investigation of the effectiveness of the coordinate search methods for solving the problem of finding the position of the solar panels, in which the greatest power of the produced current is achieved. The existing solutions in the market of sun surveillance systems (solar trackers) are analyzed. The advantages and disadvantages of such systems are presented in comparison with fixed panels. It is proposed to improve the hardware and software for research of the solar panels efficiency, developed by the authors and highlighted in the previous works, by integrating the program realization of the algorithm of coordinate search of the maximum power of solar panels into the existing. For this purpose, the efficiency of three algorithms for coordinate search of the maximum, namely, the method of coordinate ascending, the Huck-Jeeves method and the Rosenbrock method, was studied in three parameters. Experiments were carried out on data obtained both experimentally using the lab stand for solar panel efficiency research, and by generation using mathematical model of the solar panel efficiency dependance on the angle of radiation, described in previous works. TThe results of experiments are analyzed, which showed a fundamental difference between the work of coordinatewise search algorithms on a mathematical model and experimental data. The main indicators of the efficiency of algorithms are substantiated on the basis of the meteorological conditions in which the measurement was carried out for the formation of experimental data. Conclusions are drawn regarding the efficiency of using these coordinate-based search methods for solving the problem of finding the optimal position of solar panels. Further prospects for research on this topic and the possibility of using coordinate-wise search methods in software of solar panels with a biaxial orientation on the position of the Sun are given.

The Potential Use of Liquid Oxidizer in PEM Cells

2006 ◽  
Author(s):  
Paul Erickson ◽  
David Grupp
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Catalytic Activity ◽  
Fuel Cell ◽  
Liquid Phase ◽  
Concentration Polarization ◽  
Pem Fuel Cell ◽  
Cell Systems ◽  
Novel Method ◽  
Potential Use

A novel method of using a liquid phase oxidizer in fuel cell applications has been discovered by researchers at UC Davis. This paper outlines potential implications for improving heat transfer and catalytic activity with this method. Experimental data have been collected and the results show that the proposed method of using liquid phase oxidizer does indeed allow operation of PEM fuel cell systems. Data indicate an improvement in overvoltage at low current but also clearly indicate a severely limited concentration polarization region with non-regenerated fluid. The preliminary data indicate the physical feasibility of the method but also show that more research and development is required.

scholarly journals Sustainability Ranking of Desalination Plants Using Mamdani Fuzzy Logic Inference Systems

2020 ◽  
Vol 12 (2) ◽  
pp. 631 ◽  
Author(s):  
Rabee Rustum ◽  
Anu Mary John Kurichiyanil ◽  
Shaun Forrest ◽  
Corrado Sommariva ◽  
Adebayo J. Adeloye ◽  
...  
Keyword(s):  
Fuzzy Logic ◽  
United Arab Emirates ◽  
Water Desalination ◽  
Fuzzy Logic Inference ◽  
Sustainability Analysis ◽  
Sustainability Research ◽  
Using Data ◽  
Inference Systems ◽  
Desalination Plants ◽  
Logic Inference

As water desalination continues to expand globally, desalination plants are continually under pressure to meet the requirements of sustainable development. However, the majority of desalination sustainability research has focused on new desalination projects, with limited research on sustainability performance of existing desalination plants. This is particularly important while considering countries with limited resources for freshwater such as the United Arab Emirates (UAE) as it is heavily reliant on existing desalination infrastructure. In this regard, the current research deals with the sustainability analysis of desalination processes using a generic sustainability ranking framework based on Mamdani Fuzzy Logic Inference Systems. The fuzzy-based models were validated using data from two typical desalination plants in the UAE. The promising results obtained from the fuzzy ranking framework suggest this more in-depth sustainability analysis should be beneficial due to its flexibility and adaptability in meeting the requirements of desalination sustainability.

Decision-making method for evaluating solar desalination options: the case of Saudi Arabia

2019 ◽  
Vol 11 (3) ◽  
pp. 343-356
Author(s):  
Sa'd Shannak ◽  
Malak Alnory
Keyword(s):  
Saudi Arabia ◽  
Solar Energy ◽  
Water Desalination ◽  
Economies Of Scope ◽  
Base Case ◽  
Analysis Model ◽  
Content Type ◽  
Desalination Plants ◽  
The Impact ◽  
Solar Generation

Purpose Solar as an energy source has a massive potential to reduce dependence on fossil fuels in Gulf Countries (GC). One attractive application of solar energy is solar-powered desalination, which is a viable method to produce fresh water. The most significant factor determining the potential deployment of this application is economics. Design/methodology/approach In this study, the classical economic analysis model has been modified to assess the penetration of solar technology to power desalination plants at different periods during the project lifetime. Furthermore, the environmental and financial values were combined to assess the incentive of powering desalination plants with solar energy in Saudi Arabia. Three systems of solar technologies accompanied with water desalination based on technical applicability were modeled and economically analyzed to understand the impact of various design and operation parameters. Findings This study shows that PV-RO is currently more competitive at both market and administrated prices in Saudi Arabia, followed by the MED-CSP system and finally CSP-RO system. CSP-RO system starts to generate positive surplus after 11 years, while the base case shows no positive surplus at all during the entire lifetime. Moreover, the same trend continues to hold with MED-CSP and PV-RO systems. The MED-CSP generates positive surplus after six years and PV-RO after five years only. On average, it takes eight years for a project running based on solar (CAPEX and OPEX) and desalination OPEX to generate positive cash surplus. Originality/value This paper discusses the debate about incentives for renewable energy in GC and the impact of coupling water production and solar generation. Given that there is no analytical framework built earlier, this paper provides an alternative methodology for policy analysis to understand the role of economies of scope to incentivize solar generation. In other words, the authors are investigating options to reduce the total cost of solar production as a result of increasing the number of different goods produced.

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