Improving the efficiency of detritus drying with the use of solar energy

2021 ◽  
pp. 87-97
Author(s):  
V. Kremnyov ◽  
◽  
N. Korbut ◽  
О. Shelimanova ◽  
V. Vovchak ◽  
...  
Keyword(s):  
Solar Energy ◽  
Renewable Energy Sources ◽  
Sewage Treatment ◽  
Weather Conditions ◽  
Raw Material ◽  
Specific Productivity ◽  
Water Supply Systems ◽  
Entire Volume ◽  
Processing Technologies ◽  
Material Layer

In Ukraine, there is a problem of sewage sludge disposal. The volume of sediment is growing every year, and the existing silt sites of water supply systems are not able to accept their entire volume. At the same time, experts say that sludge in sewage treatment plants is not a problem, but an asset that can help farmers grow environmentally friendly products, because these fertilizers will have a number of advantages over chemicals: they can be cheaper, more useful and more efficient. At the same time, the processing of the so-called detritus (wet mixture of mineral and partially decomposed biological components) is complicated by the high initial humidity of the product. And according to the results of previous studies, if the humidity of the raw material is in the range of 45… 80 %, processing technologies can become economically feasible only if the intensification of its drying processes - as the most energy-intensive of technological processes. The aim of the work is to study the possibility of using renewable energy sources, in particular solar energy, to reduce energy consumption during pre-drying of wet material - one of the most important processes in the manufacture of granular fertilizers from waste treatment plants. A polycarbonate-coated greenhouse was used for sludge drying. The elongated side of the greenhouse is located in the east-west direction and has an angle of inclination to the horizon of 30°. The northern side of the roof covering is opaque and insulated. On the inside, it has a light-reflecting coating that directs rays at the material. The experiments were carried out in summer without additional heat, except for the heat of the sun. The experiments changed: weather conditions, the thickness of the material layer, the amount of mixing, the initial humidity of the material. Main results: Identified factors: - which lead to the most noticeable changes in the specific productivity of the laboratory dryer: ambient temperature, clarity-cloudiness; relative humidity in the environment, the amount of stirring, floor heating; - which do not lead to a significant impact: the thickness of the material layer, the initial humidity of the material. Key words: biomineral fertilizers, detritus, solar dryer

scholarly journals Water-air regenerative heat exchanger with increased heat exchange efficiency

2021 ◽  
Vol 295 ◽  
pp. 04005
Author(s):  
Sergey Batukhtin ◽  
Andrey Batukhtin ◽  
Marina Baranovskaya
Keyword(s):  
Renewable Energy ◽  
Solar Energy ◽  
Solar Collector ◽  
Renewable Energy Sources ◽  
Thermal Power ◽  
Economic Effect ◽  
Hot Water ◽  
Energy Sources ◽  
Water Supply Systems ◽  
Regenerative Heat

According to experts’ forecasts, by 2040 the global demand for energy will increase by 37%, and renewable energy sources in the next 20 years will become the fastest growing segment of the world energy, their share in the next decade will grow by about one and a half times. Solar energy is the fastest growing industry among all non-conventional energy sources and is gaining the highest rates of development in comparison with other renewable energy sources. In this article, the authors provide an overview of the technologies that increase the efficiency and productivity of solar panels, only the investigated methods are described that can speed up the process of introducing solar energy instead of traditional. All the methods described can increase the efficiency of systems that are based on the use of the sun as the main source of energy. The authors presented and described the scheme of a solar-air thermal power plant, which will improve energy efficiency through the use of a regenerative air solar collector with increased heat transfer efficiency. Strengthening will be achieved through the use of hemispherical depressions on the surface that receives solar radiation. A schematic diagram is given and the principle of operation of such a solar collector is described in detail. A comparative calculation of the intensification of the solar collector with the use of depressions and without the use as modernization was carried out, on the basis of which a conclusion was made about the efficiency of using this type of solar collector and the economic effect from the application of this method. A description of the method for calculating the solar collector is given, thanks to which this development can be used and implemented in existing heating and hot water supply systems.

scholarly journals Solar Energy in the Logistics Sector: Assessments on Turkey

2019 ◽  
Vol 5 (2) ◽  
Author(s):  
Ayşegül Taşçıoğlu ◽  
Hilal Yıldırır Keser
Keyword(s):  
Renewable Energy ◽  
Solar Energy ◽  
Renewable Energy Sources ◽  
Raw Material ◽  
Transport Infrastructure ◽  
Energy Sources ◽  
Important Place ◽  
Starting Point ◽  
The World ◽  
Photovoltaic Technology

The fact that the current energy production resources have a tendency to be extinguished rapidly, the raw material prices have increased, their negative effects on the environment and human health, some difficulties in their use have increased the studies conducted on new and renewable energy sources in recent years. Among the renewable energy technologies, even though it is somewhat expensive, the easiest technology in terms of design and installation is the photovoltaic technology which is an application of solar energy. But its real superiority arises from the fact that it is a technology that does not pollute the environment, is environmentally friendly and has low maintenance costs. The use of solar energy has increased considerably with the increase in the use of renewable energy sources in the world and in our country in recent years and the roofs have had the largest share in this regard. Considering that more than 50% of the installed facilities in Germany and Italy, which are the starting point of solar energy in Europe, are on the roofs, the roofs have an important place in the increase of solar energy usage. Turkey is in fortunate situation compared to many countries in terms of the solar energy potential due to its geographical location. South Eastern Anatolia Region is the region that receives the most solar energy, this is followed by the Mediterranean Region. The logistics sector has recently been one of the sectors in which the solar energy is widely used in the world and in Turkey. In particular, significant reductions have been achieved in logistics costs with the solar energy systems installed on the roofs of the logistics warehouses, this event have increased the competitiveness of the companies. In addition, it is known that solar energy has been started to be used in the transportation activities and there are R & D studies for increasing road vehicles and cargo ships working with solar energy. In addition, efforts are being made to improve the solar-powered highways which strengthen the transport infrastructure and the logistics processes and these applications are becoming widespread. In study, the solar energy which is one of the mostly interested one among the renewable energy forms and the photovoltaic technology producing electrical energy using it will be discussed in this context, an then the current situation in Turkey and the World will be presented. Finally, the usage of the solar energy in the logistics sector and the applicaton examples in the world and in Turkey will be included.

An Improved Strategy for High-Efficiency Multistage PV Module Using MPPT Technique

2021 ◽  
Vol 9 (VI) ◽  
pp. 3297-3303
Author(s):  
Rahul Tiwary
Keyword(s):  
Renewable Energy ◽  
Solar Energy ◽  
High Efficiency ◽  
Renewable Energy Sources ◽  
Weather Conditions ◽  
Solar Panel ◽  
Renewable Energy Resources ◽  
Efficient Operation ◽  
Grid Current ◽  
Pv Module

Renewable energy supplies are renewable energy sources that are of great benefit to the world today. Among the most commonly used renewable energy resources, solar energy is used to produce electricity, clean water supplies, respectively in every area of our lives. Photovoltaic cell transforms solar energy into electricity type, which includes solar cells. Some MPPT systems have been suggested to obtain optimum efficiency out of this system under different weather conditions. For an efficient operation and power extracted from a PV module, an MPPT is necessary. To improve the accuracy of the Solar Panel, a variety of approaches are used, the most common of which is MPPT or P&O. The basic goal of full power point tracking is to interpret the voltage and current from the solar panel, measure the power, and then display the power to its limit. Multi-stage DC-DC converter manages MPPT, and PWM controls grid current from Inverter. The inverter circuit provides all the activities in a single phase that involve MPPT and grid current power. In this proposed work, the DC / AC converter will be intended to ensure the system's safe interconnection and procedure and to retain the utility grid's power quality, so both MPPT techniques will be analyzed, established and contrasted via a converter to convert the highest energy from PV to the grid.

scholarly journals STUDI PENYIMPANAN ENERGI PADA BATERAI PLTS

2018 ◽  
Vol 9 (2) ◽  
pp. 120-125
Author(s):  
Redaksi Tim Jurnal
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Solar Energy ◽  
Greenhouse Effect ◽  
Fossil Fuels ◽  
Renewable Energy Sources ◽  
Weather Conditions ◽  
Human Needs ◽  
Late Night ◽  
The Right

The use of fossil fuels such as petroleum, coal and others as a fuel for conventional plants has an impact on the environment. Environmental impacts that occur such as environmental pollution from the greenhouse effect (greenhouse effect) that causes global warming, acid rain, the destruction of the ozone layer to the loss of tropical forests. With the condition of the need for renewable energy in the fossil energy era is running thinning at this time making the use of solar energy to meet human needs for energy to be the right choice. The use of solar energy becomes an option because of the nature of the source of solar energy that will not run out, and its easy use and application compared to other renewable energy sources. PLTS maintenance support becomes very important when PLTS has been installed. In Solar Power Generation, energy storage systems need special attention because they involve continuous energy availability especially during cloudy or late night when there is no sunlight. In this research will be discussed about the study of energy storage on PLTS battery. This characteristic is influenced by several things such as weather conditions and duration of irradiation on an area that affect the value of light intensity, voltage (V), current (I) and power that can be caused. From the research found that installed solar panels can generate power 1553,82 watts for 9 hours of solar radiation for one day.

Cost Effective Synthesis and Fabrication of Phase-Pure Kesterite Cu2-xZn1.3SnS4 P-type Absorber Layer Thin Films by Solvent Based Process Technique for Photovoltaic Solar Energy Applications

2018 ◽  
Vol 7 (4) ◽  
pp. 36
Author(s):  
B. Khadambari ◽  
S. S. Bhattacharya
Keyword(s):  
Solar Energy ◽  
Renewable Energy Sources ◽  
Cost Effective ◽  
Absorber Layer ◽  
Window Layer ◽  
Energy Applications ◽  
Process Technique ◽  
Absorber Material ◽  
Effective Synthesis ◽  
P Type

Solar has become one of the fastest growing renewable energy sources. With the push towards sustainability it is an excellent solution to resolve the issue of our diminishing finite resources. Alternative photovoltaic systems are of much importance to utilize solar energy efficiently. The Cu-chalcopyrite compounds CuInS2 and CuInSe2 and their alloys provide absorber material of high absorption coefficients of the order of 105 cm-1. Cu2ZnSnS4 (CZTS) is more promising material for photovoltaic applications as Zn and Sn are abundant materials of earth’s crust. Further, the preparation of CZTS-ink facilitates the production of flexible solar cells. The device can be designed with Al doped ZnO as the front contact, n-type window layer (e.g. intrinsic ZnO); an n-type thin film buffer layer (e.g. CdS) and a p-type CZTS absorber layer with Molybdenum (Mo) substrate as back contact. In this study, CZTS films were synthesized by a non-vaccum solvent based process technique from a molecular-ink using a non toxic eco-friendly solvent dimethyl sulfoxide (DMSO). The deposited CZTS films were optimized and characterized by XRD, UV-visible spectroscopy and SEM.

SIFAT FISIS MEKANIS BAMBU LAPIS SEBAGAI BAHAN BAKU PRODUK INTERIOR

2011 ◽  
Vol 3 (1) ◽  
pp. 15
Author(s):  
Arhamsyah Arhamsyah
Keyword(s):  
Flexural Strength ◽  
Water Content ◽  
Raw Material ◽  
Technical Aspects ◽  
Material Layer ◽  
Weight Variation

Research on the utilization of bamboo as a raw material layer interior products have been made. This research aims to determine the nature of plybamboo in terms of technical aspects / processes of manufacture, physical and mechanical, the influence of weight variation labur adhesive, adhesive types and kinds of bamboo products plybamboo.This type of bamboo used is sweet bamboo (Gigantochloa atter Kurz) and bamboo lear (Gigantochloa apus Kurz).The adhesive used was adhesive Polyvinil Acetat (PVAc) and Chloroprene with adhesive labur weight each - each 150 gr/m2, 200 gr/m2 and 250 gr/m2. The parameters tested were water content, density, flexural strength of dry and delamination.The results showed that the treatment using bamboo material with adhesive Chloroprene sweet heavy labur 250 gr/m2 produce the best plybamboo.Keywords: bamboo, glue, physical, mechanical

Sustainable Cooling with Hybrid Concentrated Photovoltaic Thermal (CPVT) System and Hydrogen Energy Storage

2018 ◽  
Vol 1 (2) ◽  
pp. 40-51 ◽  
Author(s):  
Muhammad Burhan ◽  
Muhammad Wakil Shahzad ◽  
Kim Choon Ng
Keyword(s):  
Energy Storage ◽  
Solar Energy ◽  
Optimization Algorithm ◽  
Concentration Ratio ◽  
Cooling System ◽  
Renewable Energy Sources ◽  
Hot Water ◽  
Hydrogen Energy ◽  
Adsorption Chiller ◽  
Back Plate

Standalone power systems have vital importance as energy source for remote area. On the other hand, a significant portion of such power production is used for cooling purposes. In this scenario, renewable energy sources provide sustainable solution, especially solar energy due to its global availability. Concentrated photovoltaic (CPV) system provides highest efficiency photovoltaic technology, which can operate at x1000 concentration ratio. However, such high concentration ratio requires heat dissipation from the cell area to maintain optimum temperature. This paper discusses the size optimization algorithm of sustainable cooling system using CPVT. Based upon the CPV which is operating at x1000 concentration with back plate liquid cooling, the CPVT system size is optimized to drive a hybrid mechanical vapor compression (MVC) chiller and adsorption chiller, by utilizing both electricity and heat obtained from the solar system. The electrolysis based hydrogen is used as primary energy storage system along with the hot water storage tanks. The micro genetic algorithm (micro-GA) based optimization algorithm is developed to find the optimum size of each component of CPVT-Cooling system with uninterrupted power supply and minimum cost, according to the developed operational strategy. The hybrid system is operated with solar energy system efficiency of 71%.

scholarly journals Rooftop Solar PV Penetration Impacts on Distribution Network and Further Growth Factors—A Comprehensive Review

Electronics ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 55
Author(s):  
Busra Uzum ◽  
Ahmet Onen ◽  
Hany M. Hasanien ◽  
S. M. Muyeen
Keyword(s):  
Solar Energy ◽  
Power Quality ◽  
Distribution System ◽  
Renewable Energy Sources ◽  
Distribution Network ◽  
System Stability ◽  
Solar Pv ◽  
Voltage Quality ◽  
Solution Methods ◽  
Pv Penetration

In order to meet the electricity needs of domestic or commercial buildings, solar energy is more attractive than other renewable energy sources in terms of its simplicity of installation, less dependence on the field and its economy. It is possible to extract solar energy from photovoltaic (PV) including rooftop, ground-mounted, and building integrated PV systems. Interest in rooftop PV system applications has increased in recent years due to simple installation and not occupying an external area. However, the negative effects of increased PV penetration on the distribution system are troublesome. The power loss, reverse power flow (RPF), voltage fluctuations, voltage unbalance, are causing voltage quality problems in the power network. On the other hand, variations in system frequency, power factor, and harmonics are affecting the power quality. The excessive PV penetration also the root cause of voltage stability and has an adverse effect on protection system. The aim of this article is to extensively examines the impacts of rooftop PV on distribution network and evaluate possible solution methods in terms of the voltage quality, power quality, system protection and system stability. Moreover, it is to present a comparison of the advantages/disadvantages of the solution methods discussed, and an examination of the solution methods in which artificial intelligence, deep learning and machine learning based optimization and techniques are discussed with common methods.

scholarly journals Performance Evaluation of Neural Network-Based Short-Term Solar Irradiation Forecasts

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3030
Author(s):  
Simon Liebermann ◽  
Jung-Sup Um ◽  
YoungSeok Hwang ◽  
Stephan Schlüter
Keyword(s):  
Neural Network ◽  
Goodness Of Fit ◽  
Renewable Energy Sources ◽  
Weather Conditions ◽  
Solar Irradiation ◽  
Weather Data ◽  
Short Term ◽  
Climate Conditions ◽  
Lstm Network ◽  
The Time Domain

Due to the globally increasing share of renewable energy sources like wind and solar power, precise forecasts for weather data are becoming more and more important. To compute such forecasts numerous authors apply neural networks (NN), whereby models became ever more complex recently. Using solar irradiation as an example, we verify if this additional complexity is required in terms of forecasting precision. Different NN models, namely the long-short term (LSTM) neural network, a convolutional neural network (CNN), and combinations of both are benchmarked against each other. The naive forecast is included as a baseline. Various locations across Europe are tested to analyze the models’ performance under different climate conditions. Forecasts up to 24 h in advance are generated and compared using different goodness of fit (GoF) measures. Besides, errors are analyzed in the time domain. As expected, the error of all models increases with rising forecasting horizon. Over all test stations it shows that combining an LSTM network with a CNN yields the best performance. However, regarding the chosen GoF measures, differences to the alternative approaches are fairly small. The hybrid model’s advantage lies not in the improved GoF but in its versatility: contrary to an LSTM or a CNN, it produces good results under all tested weather conditions.

scholarly journals Legitimating power: Solar energy rollout, sustainability metrics and transition politics

2021 ◽  
pp. 251484862110249
Author(s):  
Siddharth Sareen
Keyword(s):  
Solar Energy ◽  
Political Ecology ◽  
Global Climate ◽  
Renewable Energy Sources ◽  
Energy Transition ◽  
Analytical Framework ◽  
Solar Irradiation ◽  
Low Carbon ◽  
Sustainability Metrics ◽  
Energy Transitions

Increasing recognition of the irrefutable urgency to address the global climate challenge is driving mitigation efforts to decarbonise. Countries are setting targets, technological innovation is making renewable energy sources competitive and fossil fuel actors are leveraging their incumbent privilege and political reach to modulate energy transitions. As techno-economic competitiveness is rapidly reconfigured in favour of sources such as solar energy, governance puzzles dominate the research frontier. Who makes key decisions about decarbonisation based on what metrics, and how are consequent benefits and burdens allocated? This article takes its point of departure in ambitious sustainability metrics for solar rollout that Portugal embraced in the late 2010s. This southwestern European country leads on hydro and wind power, and recently emerged from austerity politics after the 2008–2015 recession. Despite Europe’s best solar irradiation, its big solar push only kicked off in late 2018. In explaining how this arose and unfolded until mid-2020 and why, the article investigates what key issues ambitious rapid decarbonisation plans must address to enhance social equity. It combines attention to accountability and legitimacy to offer an analytical framework geared at generating actionable knowledge to advance an accountable energy transition. Drawing on empirical study of the contingencies that determine the implementation of sustainability metrics, the article traces how discrete acts legitimate specific trajectories of territorialisation by solar photovoltaics through discursive, bureaucratic, technocratic and financial practices. Combining empirics and perspectives from political ecology and energy geographies, it probes the politics of just energy transitions to more low-carbon and equitable societal futures.

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