scholarly journals Analisa Perbandingan Performansi AC SPLIT Konvensional Dengan AC SPLIT Tenaga Surya

2021 ◽  
Vol 14 (1) ◽  
pp. 6-10
Author(s):  
Yudhy Kurniawan
Keyword(s):  
Solar Radiation ◽  
Research Method ◽  
Fossil Fuels ◽  
Electrical Power ◽  
Test Results ◽  
Pv System ◽  
Tropical Country ◽  
Pv Cell ◽  
Ac Current ◽  
Solar Powered

Currently, the world's energi needs are still dominated by depleting fossil fuels, where the largest consumption produced from these fossils is electrical energi. For tropical country conditions, on average, every house and in city buildings use split AC as a tool to condition the room so that it feels comfortable for its residents. Where about 60% utilize electrical energi. In this study, split AC uses solar power as an alternative to electrical energi by using a solar photovoltage (PV) system as a medium for absorbing solar radiation to be converted into electrical energi in split AC. The goal is that the use of solar radiation is able to reduce the use of electricity from PLN, which so far requires a large amount of money. The research method begins by making a model of a device that is modified by an electric panel on a split AC connected to an inverter to convert DC to AC current from the PV cell. From the use of solar cells as electrical energi then the test results are compared with conventional split AC. The results obtained from the conventional split AC test can be seen that the efficiency is 85% while the solar-powered split AC has an efficiency of 73%, but for the use of electrical power that operates for 2 hours on a solar-powered split AC, it is more efficient with a power of 376 Wh per day.

scholarly journals Thermal Profile of a Low-Concentrator Photovoltaic: A COMSOL Simulation

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Maryam M. Alqurashi ◽  
Reem M. Altuwirqi ◽  
Entesar A. Ganash
Keyword(s):  
Wind Speed ◽  
Temperature Gradient ◽  
Solar Radiation ◽  
Fossil Fuels ◽  
Electrical Power ◽  
Optimum Operating ◽  
Optimum Operating Temperature ◽  
Thermal Profile ◽  
Ambient Temperatures ◽  
Pv Panel

With the gradual reduction of fossil fuels, it is essential to find alternative renewable sources of energy. It is important to take advantage of substitutes that are less expensive and more efficient in energy production. Photovoltaic concentrators (CPVs) are effective methods through which solar energy can be maximized resulting in more conversion into electrical power. V-trough concentrators are the simplest types of low-CPV in terms of design as it is limited to the use of two plane mirrors with a flat photovoltaic (PV) plate. A consequence of concentrating more solar radiation on a PV panel is an increase in its temperature that may decrease its efficiency. In this work, the thermal profile of the PV plate in a V-trough system will be determined when this system is placed in different geographical locations in Saudi Arabia. The simulation is conducted using COMSOL Multiphysics software with a ray optics package integrated with a heat transfer routine. The 21st of June was chosen to conduct the simulation as it coincides with the summer solstice. The employment of wind as a cooling method for V-troughs was investigated in this work. It was found that with the increase in wind speed, the PV panel temperature dropped significantly below its optimum operating temperature. However, due to the mirrors’ attachment to the PV panel, the temperature distribution on the surface of the panel was nonuniform. The temperature gradient on the PV surface was reduced with the increase of wind speed but not significantly. Reducing the size of the mirrors resulted in a partial coverage of solar radiation on the PV surface which helped in reducing the temperature gradient but did not eliminate it. This work can assist in testing numerous cooling models to optimize the use of V-troughs and increase its efficiency especially in locations having high ambient temperatures.

scholarly journals A simplified PWM technique for PV fed Five-Level Five switch Multilevel Inverter

2018 ◽  
Vol 7 (4.24) ◽  
pp. 4
Author(s):  
Ali Qasim Hussein Algburi ◽  
P. V. Ramana Rao
Keyword(s):  
Power Generation ◽  
Alternative Energy ◽  
Fossil Fuels ◽  
Pulse Width Modulation ◽  
Electrical Power ◽  
Power Source ◽  
Pv System ◽  
Alternative Energy Sources ◽  
Voltage Stress ◽  
Multi Level

Bulk electrical power generation is generated using fossil fuels which emit huge pollution which is a global constraint today. Non-conventional sources of energy are the alternative energy sources for power generation. Non-conventional sources like PV (photo-voltaic) system are used as power source now-a-days. Multi-level inverters (MLI) are dominating inverter circuits giving out voltage with less distortion eventually reducing voltage stress on switches and size of filter. This paper presents a MLI structure with five switches giving out five-level output from the inverter. PV system is used as source and boost converter amplifies the PV output voltage to desired value. The paper presents a simplified PWM (pulse width modulation) technique for PV fed five switch five-level inverter. The proposed system is developed and results are obtained using MATLAB/SIMULINK software. Results are presented for the system considering R-load and RL-load conditions.

scholarly journals Design and Optimization of Solar Carport Canopies for Maximum Power Generation and Efficiency at Bahawalpur

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Farhana Umer ◽  
Muhammad Shehzad Aslam ◽  
Muhammad Shoaib Rabbani ◽  
Muhammad Javed Hanif ◽  
Nadeem Naeem ◽  
...  
Keyword(s):  
Power Generation ◽  
Electric Power ◽  
Fossil Fuels ◽  
Renewable Energy Sources ◽  
Electrical Power ◽  
Pv System ◽  
Parking Lots ◽  
Design And Optimization ◽  
Electricity Cost ◽  
Parking Lot

In recent years, the upturn demand of electricity and the generation of electrical power demand from fossil fuels are increasing day by day which results in environmental impacts on the atmosphere by greenhouse gases, and a high cost of electric power from these sources makes it unaffordable. The use of renewable energy sources can overcome this problem. Therefore, in this work, we present a solution by implementing the solar car parking lots. A detailed work has been done for solar car parking site selection and maximum solar electric power generation and its capacity effects with the shading of nearby trees and buildings by using the HelioScope online software developed by Folsom Labs. A detailed optimization and selection of car parking canopies are performed at different standard tilt angles to produce maximum solar photovoltaic energy, and it is analyzed that the monopitch canopy is the best to mount at solar car parking lots at a tilt angle of 10°. We have done a detailed economic analysis which shows that 14% electricity cost was offset by the installation of a solar car parking lot with 17% reduction in annual energy consumption from the grid at the proposed site. The total investment cost of the parking structure and the photovoltaic (PV) system can be paid back in 6-7 years.

Evaluating the Seasonal Weather Influence on the Electrical Power Generation From Solar Cells

2021 ◽  
Vol 12 (1) ◽  
pp. 26-39
Author(s):  
Yas A. Alsultanny ◽  
Eiman Alharbi
Keyword(s):  
Power Generation ◽  
Solar Cells ◽  
Electrical Power Generation ◽  
Fossil Fuels ◽  
Renewable Energy Sources ◽  
Electrical Power ◽  
Civil Aviation ◽  
Primary Data ◽  
Pv System ◽  
Seasonal Weather

The renewable energy sources were considered as a potentially promising and far less harmful alternative to traditional methods of electrical production. The main aim of this paper is to evaluate the seasonal weather influence on the electrical power generation from solar cells. Experimental and quantitative methodologies were used to analysis the data were collected from two sources the primary data were collected from PhotoVoltaic (PV) system of capacity 1200W for one year. The second source of data were collected from the Kuwait Directorate General of Civil Aviation. The key findings of the results showed that the daily sunlight hours are considered an important factor for electrical power generation; the temperature had reverse impact when it raised to more than 30oC, and the relative humidity had reverse impact when it raised to more than 49%. The CO2 avoided by this system was 1.325tonnes per year. The recommendation of this study is to depend on PV cells to reduce dependence on fossil fuels.

Beam Splitting System for the Development of a Concentrating Linear Fresnel Solar Hybrid PV/T Collector

2013 ◽  
Author(s):  
Felipe Crisostomo ◽  
Robert A. Taylor ◽  
Ahmad Mojiri ◽  
Evatt R. Hawkes ◽  
Desiree Surjadi ◽  
...  
Keyword(s):  
Spectral Response ◽  
Electrical Power ◽  
Economic Value ◽  
Solar Spectrum ◽  
Electrical Energy ◽  
Beam Splitting ◽  
Pv System ◽  
Thermal Output ◽  
Pv Cell ◽  
Power Outputs

Investigations are underway around the world to make solar energy more competitive in the energy market [1–3]. One approach is to develop solar hybrid photovoltaic/thermal (PV/T) technologies which allow for maximal utilization of incident sunlight by integrating a PV cell and a thermal receiver in the same collector [4,5]. In this study, we will present a new PV/T design based on a compact linear Fresnel concentrator (LFC) coupled with a spectral beam-splitter. The beam-splitting approach avoids the efficiency drop in the PV cell while still obtaining high temperature thermal output. The design is analyzed numerically with respect to a worth factor which considers the intrinsically higher economic value of electrical energy at ∼3 times thermal energy. In order to predict optical performance, the geometry of this hybrid concentrating collector, which achieves 10–15 suns concentration, is modeled at various incident angles using the ray tracing software Zemax. Three different PV cells are considered (Si, GaAs and GaInP/GaAs). The reported spectral response of these cells is used to determine the optimal wavelength split for the fraction of the solar spectrum directed to the various PV cells. The results indicate that such designs can achieve 20–51% greater value of the power outputs — PV electrical power plus heat produced — relative to a stand-alone PV system.

scholarly journals Parallel Operation of Current-Source Inverter for Low-Voltage High-Current Grid-Connected Photovoltaic System

2019 ◽  
Vol 9 (4) ◽  
pp. 2220
Author(s):  
Suroso Suroso ◽  
Daru Tri Nugroho ◽  
Amran Amran ◽  
Toshihiko Noguchi
Keyword(s):  
Fossil Fuels ◽  
Low Voltage ◽  
Current System ◽  
Electrical Power ◽  
Current Source ◽  
Electrical Energy ◽  
Photovoltaic System ◽  
High Current ◽  
Parallel Operation ◽  
Tropical Country

Solar energy is very potential to be developed in a tropical country such as in Indonesia. This energy source is eco-friendly because it can eliminate air pollution such as caused by conventional fossil fuels. This research article presents analysis results of a novel grid-connected photovoltaic system using low-voltage high-current system. The electrical energy produced by the photovoltaic system was sent into the electrical power grid using two or more H-bridge current source inverters operated in parallel. The proposed system is very suitable for large size photovoltaic system because of its some merits. The inverter circuits work generating sinusoidal output currents and controlling the power delivered into the grid. The test results of the new system showed that the system worked properly as interface between photovoltaic system and the electrical grid delivering high ac current with low harmonic distortion.

scholarly journals An Experimental Study on Transient Response of a Hybrid Thermoelectric–Photovoltaic System with Beam Splitter

Energies ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 8129
Author(s):  
Sajjad Mahmoudinezhad ◽  
Petru Adrian Cotfas ◽  
Daniel Tudor Cotfas ◽  
Enok Johannes Haahr Skjølstrup ◽  
Kjeld Pedersen ◽  
...  
Keyword(s):  
Hybrid System ◽  
Beam Splitter ◽  
Electrical Power ◽  
Weather Conditions ◽  
Spectrum Management ◽  
Photovoltaic System ◽  
Pv System ◽  
Cloudy Weather ◽  
Pv Cell ◽  
The Impact

In the current study, the electrical responses of a thermoelectric (TE) module and a photovoltaic (PV) cell are investigated in three different systems, namely, a PV-only system, TE-only system, and hybrid TE-PV system with a beam splitter (TE-PV-BS), under variable solar irradiations demonstrating partly cloudy weather conditions. To enhance the deployment of solar energy, a predesigned beam splitter combined with the amorphous silicon TE and PV system is used in the experiments. The impact of the spectral beam splitting technology on the conversion performance of the TE module and PV cell in the hybrid system is studied and compared to the performance of the TE-only and PV-only systems. The electrical output parameters of the TE module and PV cell are obtained for the studied systems, and they are discussed in detail. The results of this work show that the power generated by the PV cell has a stepwise fluctuation similar to the variation in the concentrated solar radiation. Affected by its heat capacity, the power variation is monotonous with the TE module. The results moreover indicate that there is more power generated by the PV cell in the TE-PV-BS hybrid system than by the PV-only system. In comparison, the TE-only system produces more power than the TE module in the hybrid system. Furthermore, the TE-PV-BS hybrid system generates higher and more stable electrical power than the TE-only and PV-only systems, showing a significant advantage of the spectrum management concept.

PENINGKATAN FLUENCY DAN ELABORATION DENGAN MODIFIED FREE INQUIRY

EDUDEENA ◽  
2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Agus Miftakus Surur
Keyword(s):  
Research Method ◽  
Positive Response ◽  
Lesson Plan ◽  
Class Action ◽  
Material Research ◽  
Test Results ◽  
Student Activity ◽  
Free Inquiry ◽  
Is Research ◽  
Research Type

Researchers chose a modified free inquiry model to help improve students’ fluency and elaboration. The purpose of this research is to know the application of modified free inquiry which can improve the student’s fluency and elaboration of students’ thinking on trigonometric material. Research method in this research is qualitative research method and research type is research of class action. The data in this study were obtained from the results of validation, test results, observation of teacher and student activity, and interview result, then apply data triangulation and theory to check the validity of data. The results showed an increase in fluency and elaboration in students. This means that a modified free inquiry model can help improve students’ fluency and elaboration in trigonometric learning. The results are supported by the observation of teacher and student activity that is in accordance with the lesson plan and also the result of the interview which get positive response from the students.Keywords: modified free inquiry, fluency and elaboration, mathematics

Analisa Pengujian Repeatability Timbangan Elektronik dengan Metode Syarat Teknis Timbangan Non Otomatis dan Metode NMI Australia

2019 ◽  
Vol 4 (2) ◽  
pp. 176-183
Author(s):  
Ponco Wali
Keyword(s):  
Research Method ◽  
Test Methods ◽  
Test Results ◽  
Repeat Testing ◽  
Testing Method ◽  
Technical Requirements

Testing repeat electronic scales with non-automatic scales technical requirements so far is fairly long if not using a calculator or computer. The aim of this research is to compare the repeatability testing method of electronic scales using methods according to the technical requirements of non-automatic scales and the Australian NMI method, both of which refer to OIML R76 in determining the validity or cancellation of electronic scales repeatability testing. This research method is done through repeat testing on 3 samples of electronic scales, then on each electronic scale 2 test methods are performed. The conclusion is that the electronic scales repeatability testing uses the non-automatic scales technical requirements method and the Australian NMI method has some differences although both refer to OIML R76. These differences include several points, namely the charge used, the method of adding additions, the formula for determining electronic scales, and different test results. The Australian NMI method is deemed to make it easier and more time efficient compared to the non-automatic weighing technical requirements method.

scholarly journals DEVELOPMENT OF THE MONTHLY AVERAGE DAILY SOLAR RADIATION MAP USING A-CBR, FEM, AND KRIGING METHOD

2017 ◽  
Vol 24 (2) ◽  
pp. 489-512 ◽  
Author(s):  
Choongwan KOO ◽  
Taehoon HONG ◽  
Kwangbok JEONG ◽  
Jimin KIM
Keyword(s):  
Solar Radiation ◽  
Decision Makers ◽  
Estimation Accuracy ◽  
Case Based Reasoning ◽  
Final Decision ◽  
Kriging Method ◽  
Pv System ◽  
Fem Model ◽  
Remote Sensors ◽  
Monthly Average

Photovoltaic (PV) system could be implemented to mitigate global warming and lack of energy. To maximize its effectiveness, the monthly average daily solar radiation (MADSR) should be accurately estimated, and then an accurate MADSR map could be developed for final decision-makers. However, there is a limitation in improving the accuracy of the MADSR map due to the lack of weather stations. This is because it is too expensive to measure the actual MADSR data using the remote sensors in all the sites where the PV system would be installed. Thus, this study aimed to develop the MADSR map with improved estimation accuracy using the advanced case-based reasoning (A-CBR), finite element method (FEM), and kriging method. This study was conducted in four steps: (i) data collection; (ii) estimation of the MADSR data in the 54 unmeasured locations using the A-CBR model; (iii) estimation of the MADSR data in the 89 unmeasured locations using the FEM model; and (iv) development of the MADSR map using the kriging method. Compared to the previous MADSR map, the proposed MADSR map was determined to be improved in terms of its estimation accuracy and classification level.

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