scholarly journals Monitoring and Visualization of Solar PV Thermal Flow via Interpolation Techniques

2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Feras A. Hafiz ◽  
Y.I. Go ◽  
Rodney H.G. Tan ◽  
Saqaff A. Alkaff ◽  
T.H. Tan ◽  
...  
Keyword(s):  
Solar Panel ◽  
Temperature Profiles ◽  
Measured Temperature ◽  
Thermal Flow ◽  
Solar Pv ◽  
Solar Panels ◽  
Bilinear Interpolation ◽  
Interpolation Technique ◽  
Interpolation Techniques ◽  
Major Factors

Temperature is one of the major factors that affect the efficient of solar panels and temperature profiles on solar panel are required to optimise the performance of solar PV. A method to construct and visualise the thermal profiles of solar panel with minimum temperature measurement is proposed in this work.  Based on nine measured temperature, three different interpolation techniques are used to predict the temperature at 25 points and 81 points. The predicted temperature is then compared with measured temperature from thermal gun. MATLAB is used to reconstruct the thermal image in two different resolution, 17x17 and 33x33. Bilinear interpolation technique and resolution of 33x33 gives the best results and can be applied in industry to predict temperature profile on solar panel with minimum measurement.

Low prices will expand China's solar panel exports

2018 ◽  
Keyword(s):  
Solar Panel ◽  
Solar Photovoltaic ◽  
Solar Pv ◽  
Solar Panels ◽  
Content Type ◽  
International Prices ◽  
The World ◽  
At Home

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.

scholarly journals Study of Cellulose Nanocrystals (CNC) & Polyvinyl Alcohol (PVA) Composite Film Modified Using Silica and Polybutylene Terephthalate(PBT) As a Transparent, Hydrophobic, Self-Cleaning Cover

2020 ◽  
Author(s):  
Nishan Khadka ◽  
Sulav Parajuli ◽  
Rabindra Acharya ◽  
Sanjaya Neupane ◽  
Jyoti Giri ◽  
...  
Keyword(s):  
Cellulose Nanocrystals ◽  
Incident Light ◽  
Solar Panel ◽  
Poly Vinyl Alcohol ◽  
Solar Pv ◽  
Solar Panels ◽  
Polybutylene Terephthalate ◽  
Water Contact ◽  
Major Barrier ◽  
Self Cleaning

Solar panel soiling is a major barrier in electricity generation by solar Photo-Voltaic (PV) technology, especially in dust-prone cities like Kathmandu. Currently employed techniques use expensive cleaning bots, short-lived coatings or environmentally non-friendly coatings. This paper encompasses a study of a green alternative to counteract solar panel soiling. Cellulose nanocrystals (CNC) blended with Poly Vinyl Alcohol (PVA) with surface modification by Poly butylene terephthalate (PBT) and powdered silica was used to produce a transparent, hydrophobic film which could act as a self-cleaning cover for soiling prone solar panels. The film exhibited an average transmittance of 92.18% of the incident light in the solar PV working spectra (420nm-700nm). Hydrophobicity was quantified by the water contact angle (WCA) which was an average of 87.25°. The film was durable to photocatalytic and hydrolytic decay but further research is warranted before rendering the film suitable for use as a protective cover for solar panels.

scholarly journals Experimental Analysis of Solar PV Module by Cleaning & Cooling for Optimizing Efficiency

2021 ◽  
pp. 1-10
Author(s):  
Utpal Srivastava ◽  
Dr Rajeev Arya ◽  
Shravan Vishwakarma
Keyword(s):  
Ambient Temperature ◽  
Power Output ◽  
Cooling System ◽  
Solar Panel ◽  
Water Cooling ◽  
Solar Pv ◽  
Solar Panels ◽  
Set Up ◽  
Oriented Energy ◽  
Water Cooling System

Sun-oriented energy is a resource of energy on earth. Sun-based energy can be gotten as warmth to create power or it is additionally conceivable to change over sun-based energy straightforwardly into power. The main objective of this project is to catch maximum solar radiation from the sun and increase the overall efficiency of solar panels. To design a cleaning mechanism that runs across the length of the panel. To avoid dust-associated problems on the solar panels. The temperature in case of water cooling system was lowered down to 410C from the ambient temperature 440C at 14:00 in the morning of 21/09/2020. The power output was 4.789W and in case of set up having dust on the surface of the solar panel the temperature rose to 490C with power reduced to 4.00185W. The temperature in case of water cooling system was lowered down to 400C from the ambient temperature 430C at 14:00 in the morning of 22/09/2020. The power output was 4.89W and in case of set up having dust on the surface of the solar panel the temperature rose to 490C with power reduced to 4.00185W. The outcomes for day 3 of the experimentation were also recorded on 23/09/2020 and the setup with a cooling system produces a maximum power of 5.20 W by lowering the temperature to 370C from the maximum ambient temperature of the day 410C

Automatic Photovoltaic Solar Panel Dust Cleaning System

2021 ◽  
pp. 202-218
Author(s):  
N. Shibane ◽  
Nnamdi Nwulu ◽  
Eustace Dogo
Keyword(s):  
Renewable Energy ◽  
Renewable Energy Sources ◽  
Optimal Level ◽  
Solar Panel ◽  
Dust Particles ◽  
Energy Sources ◽  
Solar Panels ◽  
Cleaning System ◽  
Increasing Demand ◽  
Major Factors

Renewable energy sources are currently regarded as viable options for stabilizing the energy crisis globally as well as addressing global warming challenges. Solar energy is the most promising and sustainable energy source as compared to other renewable energy sources such as coal, nuclear, wind, gas, and hydro energy. The increasing demand for solar panels should be reason enough to investigate ways in which we can increase their efficiency as much as possible. Dust, dirt, and bird dropping are major factors that can affect the performance of solar panel systems. This work presents the development of a solar panel cleaning system that automatically detects dust particles and cleans the solar panel to ensure the continues efficiency of the solar system is at an optimal level. The system comprises of five subsystems: dust sensing, water pumping, microcontroller, cleaning mechanism, and the power system. Tests carried out on the system shows its quick response to signals and effectiveness in cleaning the solar panel whenever dust particles are detected.

scholarly journals Comparative Analysis of Solar Panel Output Power: Matrix Vs Tree Form

2020 ◽  
Vol 307 ◽  
pp. 01002
Author(s):  
Rahul Deep ◽  
Abhishek Mishra ◽  
Anshul Agarwal
Keyword(s):  
Energy Demand ◽  
Solar Power ◽  
Metal Structure ◽  
Point Of View ◽  
Solar Panel ◽  
Solar Pv ◽  
Solar Panels ◽  
Pv System ◽  
Tree Form ◽  
In Series

Solar energy is most important form of renewable energy. It is cheap and easily available but it required a lot of area for production of solar power to install them in a particular space. This paper proposes a comparison of solar panel in matrix form and a solar power tree in a particular area. A solar power tree requires very less place to produce efficient energy. Solar Tree is made of metal structure , it has a number of solar panels which are used to give the shape of a tree and arranged in a tall tower. Spiralling phyllataxy is technique used to improve the efficiency of the plant as it prevent the lower panel shadowing. Solar photovoltaic modules are arranged in series form like fibonacci series in place of leaves in solar tree. By using this technique the amount of energy produced by solar tree is more than the energy produce by an array of solar cells. Solar trees are produces about 50% more electricity .The increasing energy demand, economy of land, the solar tree concept is very successful one and should be implemented to provide electricity. Solar tree is much better than the traditional solar PV system in area point of view and also more efficient.

scholarly journals Enhancement the Efficiency of Solar PV by Increasing Rate of Heat Transfer

2019 ◽  
Vol 5 (6) ◽  
pp. 10
Author(s):  
Anil Khatri ◽  
Prof. Nitin Tenguria
Keyword(s):  
Electrical Energy ◽  
Solar Panel ◽  
Heat Sinks ◽  
Back Surface ◽  
Solar Pv ◽  
Solar Panels ◽  
Air Velocity ◽  
Steady State Temperature ◽  
Extended Surfaces ◽  
Cooling Methods

As the future progresses, many companies and industries are striving to achieve a “greener” approach to energy production by using solar energy. Solar panels that use PV cells (semiconductor devices used to convert light into electrical energy) are popular for converting solar power into electricity. One of the problems in using PV cells to extract energy from sunlight is the temperature effect on PV cells. As the solar panel is heated, the conversion efficiency of light to electrical energy is diminished. Because solar panels can be expensive, it is important to be able to extract as much energy as possible. The proposes cooling methods for the panel in order to achieve optimum efficiency. To achieve this, various cooling methods have been proposed. A bare solar panel with no air velocity was used as a base model. This was tested and compared to bare solar panels cooled by heat sinks, in the form of extended surfaces such as plate fins that can be mounted on the back surface of solar panels. Results showed that the heat sinks were only marginally effective; they resulted in a steady-state temperature of only a few degrees less than a solar panel without a heat sink. Due to these results, it is proposed that pump cooling would be far more beneficial. With the correctly sized pump, the temperature can be made to closely match any desired value.

scholarly journals Analytical Modeling and Optimization of a Heat Sink Design for Passive Cooling of Solar PV Panel

2021 ◽  
Vol 13 (6) ◽  
pp. 3490
Author(s):  
Fahad AlAmri ◽  
Gaydaa AlZohbi ◽  
Mohammed AlZahrani ◽  
Mohammed Aboulebdah
Keyword(s):  
Analytical Model ◽  
Conversion Efficiency ◽  
Heat Sink ◽  
Cooling System ◽  
Arid Environment ◽  
Solar Panel ◽  
Passive Cooling ◽  
Solar Pv ◽  
Solar Panels ◽  
Pv Systems

High temperature is the primary challenge in the development of solar photovoltaic (PV) systems in an arid climate. A rise in temperature diminishes the performance of the PV systems and shortens their lifespan. The goal of this manuscript is to develop an analytical model to predict the temperature of PV panels under a passive cooling system for an arid environment. Taking into consideration the link between solar panel temperature and its conversion efficiency, Kirchhoff’s and Ohm’s laws for a complex circuit were applied to calculate the heat flux in the solar panel system, and hence obtain the temperatures of each layer in the system. Closed-form analytical expressions for temperature, output power, and conversion efficiency of the solar panel were deduced and presented as functions of solar irradiance, ambient temperature, emissivity, wind velocity, tilt angle, and dimensions of fins. Comparison between the results presented in the literature and those predicted by the developed analytical model validated the presented model. Moreover, the length of the fins required for safe thermal operation of solar panels in harsh desert environment were also obtained from analysis. Furthermore, the effect of using such a cooling system on the temperature and efficiency of the solar panels was verified by using the developed model under real conditions in Dammam city during summer and winter seasons. The results showed that the optimized heat sink could raise the solar panel power by 8.7% during summer and by 6.5% during winter.

AN EXPERIMENTAL AND NUMERICAL STUDY OF HEAT TRANSFER IN A SIMULATED COLLECTOR FOR A SOLAR DRYER

1993 ◽  
Vol 17 (2) ◽  
pp. 145-160
Author(s):  
P.H. Oosthuizen ◽  
A. Sheriff
Keyword(s):  
Heat Transfer ◽  
Numerical Study ◽  
Local Heat Transfer ◽  
Lower Surface ◽  
Local Heat ◽  
Electrical Heating ◽  
Temperature Profiles ◽  
Measured Temperature ◽  
Transfer Rates ◽  
Thermocouple Probe

Indirect passive solar crop dryers have the potential to considerably reduce the losses that presently occur during drying of some crops in many parts of the “developing” world. The performance so far achieved with such dryers has, however, not proved to be very satisfactory. If this performance is to be improved it is necessary to have an accurate computer model of such dryers to assist in their design. An important element is any dryer model is an accurate equation for the convective heat transfer in the collector. To assist in the development of such an equation, an experimental and numerical study of the collector heat transfer has been undertaken. In the experimental study, the collector was simulated by a 1m long by 1m wide channel with a gap of 4 cm between the upper and lower surfaces. The lower surface of the channel consisted of an aluminium plate with an electrical heating element, simulating the solar heating, bonded to its lower surface. Air was blown through this channel at a measured rate and the temperature profiles at various points along the channel were measured using a shielded thermocouple probe. Local heat transfer rates were then determined from these measured temperature profiles. In the numerical study, the parabolic forms of the governing equations were solved by a forward-marching finite difference procedure.

scholarly journals Sensors in the Autoclave-Modelling and Implementation of the IoT Steam Sterilization Procedure Counter

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 510
Author(s):  
Lukas Boehler ◽  
Mateusz Daniol ◽  
Ryszard Sroka ◽  
Dominik Osinski ◽  
Anton Keller
Keyword(s):  
The Body ◽  
Surgical Instruments ◽  
Sensor System ◽  
Temperature Profiles ◽  
Measured Temperature ◽  
Steam Sterilization ◽  
Automated Evaluation ◽  
Normative Requirements ◽  
Thermal Simulations ◽  
The Relationship

Surgical procedures involve major risks, as pathogens can enter the body unhindered. To prevent this, most surgical instruments and implants are sterilized. However, ensuring that this process is carried out safely and according to the normative requirements is not a trivial task. This study aims to develop a sensor system that can automatically detect successful steam sterilization on the basis of the measured temperature profiles. This can be achieved only when the relationship between the temperature on the surface of the tool and the temperature at the measurement point inside the tool is known. To find this relationship, the thermodynamic model of the system has been developed. Simulated results of thermal simulations were compared with the acquired temperature profiles to verify the correctness of the model. Simulated temperature profiles are in accordance with the measured temperature profiles, thus the developed model can be used in the process of further development of the system as well as for the development of algorithms for automated evaluation of the sterilization process. Although the developed sensor system proved that the detection of sterilization cycles can be automated, further studies that address the possibility of optimization of the system in terms of geometrical dimensions, used materials, and processing algorithms will be of significant importance for the potential commercialization of the presented solution.

Mixing of an Acoustically Excited Air Jet With a Confined Hot Crossflow

1992 ◽  
Vol 114 (1) ◽  
pp. 46-54 ◽  
Author(s):  
P. J. Vermeulen ◽  
P. Grabinski ◽  
V. Ramesh
Keyword(s):  
Strouhal Number ◽  
Temperature Profiles ◽  
Measured Temperature ◽  
Mixing Zone ◽  
Wake Region ◽  
Mixing Processes ◽  
Jet Mixing ◽  
Air Jet ◽  
Percent Increase ◽  
Jet Structure

The mixing of an acoustically pulsed air jet with a confined hot crossflow has been assessed by temperature profile measurements. These novel experiments were designed to examine the effects of acoustic driver power and Strouhal number on jet structure, penetration, and mixing. The results showed that excitation produced strong changes in the measured temperature profiles. This resulted in significant increases in mixing zone size, penetration (at least 100 percent increase), and mixing, and the length to achieve a given mixed state was shortened by at least 70 percent. There was strong modification to the jet-wake region. The increase in jet penetration and mixing was saturating near 90 W, the largest driving power tested. The jet response as determined by penetration and mixing was optimum at a Strouhal number of 0.27. Overall, pulsating the jet flow significantly improved the jet mixing processes in a controllable manner.

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