Renewable energy is environmental-friendly energy compared to the conventional one. Wind energy is a renewable energy having big potential in supporting clean energy revolution in Indonesia. This research aims to calculate the wind energy potential power that can be used as a power plant. The data collection of the wind velocity is at Musamus University, Veterans' Housing, and Field of Pelayaran Lama Nowari Dormitory. The data collection is carried out in the morning, afternoon, and evening for 1 month, that is, from February-March 2018. The wind velocity is measured using Anemometer. This research uses the equation of specific and big power of the wind kinetic power that can be converted into the useful power on the shaft. The measurement results of the wind velocity on the stated locations are: the average velocity at Musamus University is 3.51 m/s with the average power potential of 32.129 Watt; the average velocity at Veteran's Housing is 3.11 m/s with the average power potential of 24.783 Watt; the average velocity at the field of Pelayaran Lama Nowari Dormitory is 2.81 m/s with power potential of 16.634 Watt. Based on the measurement result, the area or point with the wind potential as a power plant is at Musamus University campus, in which the average velocity is 3.51 m/s and the average power is 32.129 Watt.
This study was aimed to analyze coal a fuel in the form of briquettes. The coal was taken from the district of Digoel and was made cylindrical and processed without carbonization. Furthermore, the coal waspassed ultimate and proximate tests along with the analysis of nature and the combustion test of the coal briquettes. This study used an experimental method. Thechemical testing process of coal briquettes which consisted of proximate was conducted in Inorganic . The analysis and testing of coal dust were more accentuated on the rates of solid carbon, volatile matter, ash, sulfur and calorific value. In addition, proximate analysis was done using titration method which included the rates of humid moisture, ash, volatile matter and solid carbon. Besides,the test of calorific value was performed using a bomb calorimeter. This method was based upon ASTM. The grain size of the mesh of 60 was the height x diameter (58.75 mm x 73.85 mm) x and the weight of briquettes, 1.55 gr. The average of mass was 510.11 grams, tapioca 10% of 32.52 grams, 650 ml of hot water. Besides, for the mesh of 80, the size, height x diameter, was 58.75 mm x 73.85 mm, x the weight: 1.95 grams. Furthermore, the average of mass was 543.20 grams, tapioca 10% of 38.61 grams, 700 ml of hot water. In addition, the results of test showed that the coal briquettes of60 mesh had the rates of water: 8.66%, ash: 6.18%, volatile metter: 37.04%, solid carbon: 18.64%, the compressive strength: 46.17 kg/cm2, sulfate: 3.67%, nitrogen: 0.39%, and fuel calorific value: 3307 kcal/kg. For mesh 80, the results obtained 7.16% with 7.21% of ash rate, 43.86% ofvolatile metter,20.78% of solid carbon, 74.74 kg/cm2of compressive strength, and 3783 kcal/kg. Besides, the test of calorific value was done by burning the coal briquettes in 1 liter or 1000 grams in boiling water. The water was boiled at a temperature of 100 o C with 29 o C ambient temperature. In addition, the different temperatures was performedto get the efficiency of thermal combustion. The boiling temperature of the mesh of 60 was 70 o C while the mesh of 80 was 71 o C. The result showed that the thermal combustion of mesh 60 was 22.529% while mesh 80 was 17.314%.
In summer, the utilization of solar energy can possibly satisfy the water demand. This paper examines the fluid flow in solar pump systems with solar cells. Specifically, a solar pump system model was designed and subjected to an installation test. The model consists of two solar cell units connected in series, which generate electricity and flow into the pump system. By the principles of fluid mechanics, the test results were analyzed to optimize the pump efficiency. The analysis shows that the solar cell efficiency is influenced by solar intensity, while the pump loss is maximized by fluid friction. In addition, pressure increase could affect the time of water filling; the voltage and current tend to be stable or constant.
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