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In the Sibolga area, there is still a shortage of electricity supply, especially for street lighting, so accidents often occur, meanwhile there has a relatively large average solar radiation intensity is 4,784 Wh/m2/day so that potential for PLTS installation. This research aims to determine the performance of monocrystalline solar panels with the addition of a heatsink cooling fan in street lighting. The method used is an experimental. The test begins with the survey, potential calculation, design, testing, data collection and analysis. The solar panel used monocrystalline 10 WP with a heatsink cooling fan. The parameters are the panel temperature, voltage, and current from the solar panel. The results obtained are the temperature on the solar panel without heatsink cooling fan reaches 56.10°C with efficiency 11% and on the solar panel with heatsink cooling fan only gets 45.50°C with efficiency increases to 13%. This shows that the addition of a heatsink cooling fan has succeeded in cooling the temperature of the solar panels and increasing the efficiency level of solar panel performance for street lighting.

Switching from fossil fuels to alternative fuels requires adjusting several engine parameters to avoid a decrease in engine torque and power. This happens because of the different properties of different fuels. One of the parameters that must be set is the compression ratio. This study aims to determine the effect of increasing the compression ratio on the torque and power of the Honda CB 150R engine using 85% bioethanol (E85) as fuel. The research method used an experimental method with 2 types of fuel and variations in the compression ratio. From the research results, it can be seen that the torque and power using E85 fuel have increased respectively by 1.08% and 1.5% when compared to the standard compression ratio using fossil fuels. Pergantian bahan bakar dari fosil ke bahan bakar alternatif membutuhkan pengaturan pada beberapa parameter engine untuk menghindari terjadinya penurunan pada torsi dan daya mesin. Hal ini terjadi karena perbedaan dari properties bahan bakar yang berbeda. Salah satu parameter yang harus di atur adalah rasio kompresi. Penelitian ini bertujuan untuk mengatahui pengaruh dari peningkatan rasio kompresi terhadap torsi dan daya engine Honda CB 150R menggunakan bahan bakar bioetanol 85% (E85). Metode penelitian menggunakan metode eksperimen dengan 2 jenis bahan bakar dan variasi pada rasio kompresi. Dari hasil penelitian terlihat bahwa torsi dan daya dengan menggunakan bahan bakar E85 mengalami peningkatan masing-masing sebesar 1,08 % dan 1,5 % jika dibandingkan dengan rasio kompresi standard menggunakan bahan bakar fosil.

Kebutuhan akan data aktual terkait unjuk kerja mesin menjadi sangat penting dalam dunia penelitian. Data-data yang presisi mutlak diperlukan sebagai dasar dalam melakukan suatu pengembangan teknologi sebagai pembanding antara kondisi sebelum dan sesudah dilakukannya pengembangan. Penelitian ini adalah rancang bangun perangkat perekam data konsumsi bahan bakar dengan target ketelitian mencapai 10ml/menit dan Rasio Udara-Bahan Bakar (AFR) Digital untuk analisa unjuk kerja mesin pembakaran dalam. Konsumsi bahan bakar dihitung dengan pengukuran volume bahan bakar secara real-time sepanjang mesin digunakan dengan memanfaatkan sensor load cell sebagai pemberi informasi ke digital data logger dengan hasil tingkat ketelitian mencapai 3,4ml/menit. AFR diukur dengan menggunakan sensor oksigen yang diletakkan pada saluran gas buang mesin dengan hasil range pembacaan 10 s.d 20 AFR.

Subtitution of the fuel type in the gasoline engine will change the setting The engine parameters as well as modify it to minimize engine performance degradation And increased exhaust emissions. Utilization of ethanol (85% vol.) - gasoline (15% vol.) The combination (E-85) for the gasoline engine requires some machine modifications and setting parameters due to differences in properties and characters between ethanol and gasoline. This study aims to test the effect of ignition timing and compression ratio on the performance of the engine and emission gas emissions. Ignition time varies between 16-24 Before Top Dead Center (BTDC) d. While the compression ratio variation consists of 11 (standart); 12, 12.5 and 13: 1. It was found that advancing the ignition time range 16 o -24 o BDTC with 13: 1 compression ratio can increase the performance of torque, bmep, and thermal efficiency respectively 7.94%, 5, 82% and 1.6% respectively, and a decrease of emissions of co and hc respectively 56.6% and 0.6% when compared with the performance of standard gasoline-fueled engines (E0).