Performance comparison of flat static and adjustable angle solar panels for sunny weather

2017 ◽  
Author(s):  
Yaw Long Chua ◽  
Yoon Kuang Yong
Author(s):  
Machrus Ali ◽  
Aji Akbar Firdaus ◽  
Hidayatul Nurohmah ◽  
Hadi Suyono ◽  
Muhammad Aziz Muslim ◽  
...  

JURNAL ELTEK ◽  
2019 ◽  
Vol 17 (1) ◽  
pp. 83
Author(s):  
Fathoni Fathoni ◽  
Agus Pracoyo ◽  
Totok Winarno

Penggabungan pembangkit listrik panel surya dan alternator mobil mempunyai keuntungan, yaitu sama-sama pembangkit listrik DC 12 volt sehingga dapat langsung digunakan untuk pengisian baterai. Pemanfaatan alternator sebagai pembangkit listrik DC dari sumber daya tidak tetap seperti tenaga angin akan dipengaruhi oleh keadaan alam, seperti kecepatan, arah dan keberadaannya serta sifat dari alternator itu sendiri yang merupakan generator magnet tak permanen. Jika tidak ada angin atau kecepatan kurang dari batas minimalnya, arus medan alternator harus diputus agar tidak ada kerugian daya atau terjadi pengisian negatip.Diperlukan pengaturan arus medan agar dapat menghasilkan arus pengisian baterai. Penggabungan panel surya dan alternator sebagai pembangkit listrik DC atau sering disebut pembangkit listrik hybrid menjadikan sumber arus pengisian baterai lebih besar tetapi memerlukan pengaturan yang lebih komplek. Pengaturan arus pengisian baterai dari panel surya menggunakan konverter buck-boost sedangkan pada alternator menggunakan pengaturan arus medan yang berdasar pada kecepatan putarnya.Untuk pengisian secara cepat, pembatasan pengisian arus maksimal ditetapkan 5A dan tegangan maksimal 14 volt. Pemutusan pengisian dengan cara memutus arus rotor serta membuat konverter off. Pembacaan tegangan baterai dilakukan periodik.Data pengukuran padapenyinaran cuaca cerah bulan Juli 2018 dari pukul 8.00 hingga pukul 15.00 dan digabung dengan alternator dengan putaran 1.000, 1.500 dan2.000 rpm menghasilkan arus pengisian maksimal hampir 4A.   The merger of solar panel power plants and car alternators has the advantage of being both a 12 volt DC power plant which can be directly used for battery charging. The use of alternators as DC power plants from non-fixed resources such as wind power will be influenced by natural conditions, such as speed, direction and existence and the nature of the alternator itself which is a non-permanent magnet generator. If there is no wind or speed is less than the minimum, the alternator field current must be disconnected so that there is no power loss or negative charging occurs. Field current settings are needed to produce a battery charging current. The incorporation of solar panels and alternators as DC power plants or often called hybrid power plants makes the battery charging current larger but requires a more complex arrangement. Setting the battery charging current of the solar panel uses an adjustable buck-boost converter on the alternator using an alternator field current setting based on its rotational speed. For fast charging, the limitation of charging is a maximum current of 5A and a maximum voltage of 14 volts. Termination of charging by disconnecting the rotor current and making the converter off. The battery voltage reading is periodic. Measurement data on the irradiation of sunny weather in July 2018 from 8:00 to 15:00 and combined with alternators with rotations 1,000, 1,500 and 2,000 rpm produce a maximum charging current of almost 4A.


Author(s):  
Molla Asmare ◽  
Mustafa Ilbas

Nowadays, the most decisive challenges we are fronting are perfectly clean energy making for equitable and sustainable modern energy access, and battling the emerging alteration of the climate. This is because, carbon-rich fuels are the fundamental supply of utilized energy for strengthening human society, and it will be sustained in the near future. In connection with this, electrochemical technologies are an emerging and domineering tool for efficiently transforming the existing scarce fossil fuels and renewable energy sources into electric power with a trivial environmental impact. Compared with conventional power generation technologies, SOFC that operate at high temperature is emerging as a frontrunner to convert the fuels chemical energy into electric power and permits the deployment of varieties of fuels with negligible ecological destructions. According to this critical review, direct ammonia is obtained as a primary possible choice and price-effective green fuel for T-SOFCs. This is because T-SOFCs have higher volumetric power density, mechanically stable, and high thermal shocking resistance. Also, there is no sealing issue problem which is the chronic issues of the planar one. As a result, the toxicity of ammonia to use as a fuel is minimized if there may be a leakage during operation. It is portable and manageable that can be work everywhere when there is energy demand. Besides, manufacturing, onboard hydrogen deposition, and transportation infrastructure connected snags of hydrogen will be solved using ammonia. Ammonia is a low-priced carbon-neutral source of energy and has more stored volumetric energy compared with hydrogen. Yet, to utilize direct NH3 as a means of hydrogen carrier and an alternative green fuel in T-SOFCs practically determining the optimum operating temperatures, reactant flow rates, electrode porosities, pressure, the position of the anode, thickness and diameters of the tube are still requiring further improvement. Therefore, mathematical modeling ought to be developed to determine these parameters before planning for experimental work. Also, a performance comparison of AS, ES, and CS- T-SOFC powered with direct NH3 will be investigated and best-performed support will be carefully chosen for practical implementation and an experimental study will be conducted for verification based on optimum parameter values obtained from numerical modeling.


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