The fins collector design for solar thermal has widely been used and it has a higher thermal efficiency than without Fins. Photovoltaic thermal (PV/T) system produced Electrical and thermal energy instantaneously. Mathematical modeling based on steady-state thermal analysis of PV/T system with and without fins was conducted with matrix inversion method. The value results show that the PV/T system with fins collector is higher thermal and electrical efficiency than without fins. Keyword: Electrical INTRODUCTIONThe collector design is greatest vital units of solar collector system or PV/T system to collect heat from solar energy. The use of fins absorber has been conducted widely in the solar collector. Solar collector with two-pass fins have been conducted by Naphon[1] with thermal efficiency is about 30-60%. Fudholi et al. [2] have compared solar collector two-channel with and without fins performance and price welfares analysis. The energy efficiency and cost-effective of two-channel with fins are higher than without fins collector.Taghi et al. [3] have conducted the analysis of heat reaction for point covered topology in the photovoltaic thermal system. The basic idea is the exploit electrical energy through a new point covered topology. The experimental investigation shows that the performance of electrical analysis increases about 10 degrees. Kumari and Babu [4]have compared between theoretical and simulation approach of the photovoltaic cell by Matlab-Simulink Situation. The main of purpose is to catch factor of the nonlinear I-V calculation by modifying the curve at three ideas: open circuit, extreme power, and short circuit. Sharma et al.[5]haveanalyzed the demonstrating and simulation approach of off-grid power generation system by photovoltaic. The objective this research is to confirm steady process during responsibility and numerous network instabilities in network and islanding connected mode. Zohri et al.[6] have analyzed by mathematical modeling of photovoltaic thermal (PVT) with and without a v-groove collector. the energy analysis result displays that performance energy with v-groove is higher than without v-groove collector.The PV/T system has well in the future because of generating both thermal and electrical energy which it's higher dependability and lower ecological impact [7].Thermal application and different types of PV/T system solar collector on basis of physical assortment, scheme condition, and different heat removal
The solution of the environmental prob lems b ecause of fuel fossil is to use new and renewab le energy. There are many studies ab out energy analysis of solar collector with v-groove b ut exergy analysis of photovoltaic thermal system with v-groove is still less especially b y theoretical study. Photovoltaic thermal with v-groove collector has b een conducted the exergy analysis b y theoretical assessment. The matrix inversion methods were used to analyze the energy b alance equation. The theoretical assessment was conducted under the solar intensity of 385 W/m 2
Nickel Oxide (NiO) have widely applied in industrial and automotive to forming oxide layer on the substrate due to it have high thermal stability and corrosion resistant. However, NiO was not directly diffused to the substrate via co-precipitation, spray-pyrolysis and sol-gel methods. Therefore, NiO-electroplating was performed in coating FeCrAl substrate by γ-Al2O3 powder. This method was conducted using various time of 15, 30, 45, 60 and 75 minutes, a current of DC power supply is 1.28A and sulphamate type solution. From the data shows that smallest surface roughness (Ra) of NiO-electroplating (EL) samples located at EL 30 min sample for 0.69 µm. Ra of raw material was lower than coated samples due to it performed by coating activity on the substrate. It supported by coating thickness analysis that treated samples has a higher coating thickness up to 11.3 µm. EDS analysis observed some elements on coated and uncoated samples such as Carbon (C) of 4.62-20.67%, Oxygen (O) of 6.16-19.62%, Nickel (Ni) of 6.76-25.14%, Iron (Fe) of 23.96-48.53%, Sodium (Na) of 2.21-9.95%, Chromium (Cr) of 7.97-15.59% and Aluminum (Al) of 2.17-3.12%. Those elements promote to develop a protective oxide layer on FeCrAl at a high temperature of 1000 0C.
The development of composite materials is increasingly widespread, which require superior mechanical properties. From many studies, it is found that the mechanical properties of composite materials are influenced by various factors, including the reinforcement content, both in the form of fibers and particle powder. However, those studies have not investigated the effect of the hardener weight fraction on the mechanical properties of resin composite materials. Even though its function as a hardener is likely to affect its mechanical properties, it might obtain the optimum composition of the reinforcing content and hardener fraction to get the specific mechanical properties. This study examines the effect of hardener weight fraction combined with fiber powder content on mechanical properties of EPR-174 epoxy resin matrix composite and determines the optimum of Them. The research was conducted by testing a sample of composite matrix resin material reinforced with coconut fiber powder. The Powder content was made in 3 levels, i.e.: 6%, 8%, and 10%. While the hardener fraction of resin was made in 3 levels, i.e.: 0.4, 0.5, and 0.6. The test results showed that pure resin had the lowest impact strength of 1.37 kJ/m2. The specimen with a fiber powder content of 6% has the highest impact strength i.e.: 4.92 kJ/m2. The hardener fraction of 0.5 has the highest impact strength i.e.: 4.55 kJ/m2. The fiber powder content of 8% produced the highest shear strength i.e.: 1.00 MPa. Meanwhile, the hardener fraction of 0.6 has the highest shear strength i.e.: 2.03 MPa.
Community service activities aim to provide skills to partners regarding the installation of electricity at home or residence also provide an understanding of the dangers posed by the electricity. And it is expected that the target partners will be able to transmit their abilities to the surrounding community as well as other members of the Youth Organization (Karang Taruna) from Bencongan Indah, Tangerang. The approach method in solving existing problems is by conducting Technology Transfer Methods in the form of direct training. Implementation Activities of The Community Service Program is divided into three stages, namely preparation, implementation, and stages monitoring. Participants can take part in the activity well. It can be seen from the amount of curiosity they had about the material provided. Follow-up activities are carried out after the participants have applied some of the knowledge conveyed by the Service Team. Follow-up activities are intended to determine the impact of this activity. The activity is in the form of an obligation for participants to re-practice and understand the dangers of electricity and how to secure, read installation drawings, measure voltage, detect broken connections and can install home lighting with various switches and sockets in accordance with the requirements General Electrical Installation (PUIL). The results of the evaluations that have been conducted, it can be seen that the participants' knowledge to install lighting in the house increases and opens the mind of the participants to take advantage of the opportunities available to increase income. About 85% of participants actively responded positively to the skills and knowledge conveyed by the team.
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