Horizontal Pendulum Performance Analysis with Multilevel Model Plate on Ocean Wave Electric Power Plant ( PLTGL )

 with the times and the industry, the energy sources such as fossil fuels dwindling. It encourages all parties to be more advanced and developed by creating solutions to renewable energy generation with the latest innovations, one of which is the sea wave power plant pendulum system. Pontoon which uses pendulum system is one tool used to convert from ocean wave energy into electrical energy. In this study, the test conditions without using ballast onshore and off-shore testing with the ballasts. Obtained from testing the many rounds that can be generated pendulum pie plate thickness and the angle of the pontoon. To test the largest on-shore power obtained on the test using arc angle 30°, 3 mm thick, the angle of 60 power produced 0036 watts. For testing offshore in the ballasts 12 cm, 15 cm, 17.5 cm, the largest power generated at 15 cm ballasts with 0041 watts power on pie, thick, and a tilt angle equal to the on-shore testing. Number of rounds with time, the on-shore testing that produces the greatest value in the segment with an angle of 30°, a thickness of 3 mm the angle of 60o value obtained 0.938 rad / s. In the off-shore test is highest value is filled with 15 cm ballasts with 0847 rad/s. Keywords pontoon, pendulum system, test the on-shore, off-shore test, power


I. INTRODUCTION 1
Wi th population growth and increasing technological development and the resulting human increasingly dependent on fossil energy sources that can not be updated.Energy sources such as petroleum, natural gas and coal are expected to run out about the next 30 years.This causes the energy crisis in the world and make human thought to find the most energy that does not depend on fossil fuels today.In addition dwindling fossil energy and require a long time to produce this energy back, and can damage the environment due to gas emissions and other pollution caused.The use of nuclear energy requires a high cost as well as limited security issues.Hydropower generation not applicable in many places Mukhtasor, Department of Ocean Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia.Email:-Tony Bambang Musriyadi, Department of Marine Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia.Email:-Irfan Syarief Arief Department of Marine Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia.Email:irfansya@its.ac.idArdika Wendy Cahya Saputra, Surabaya 60111, Indonesia.Email:-because of the availability of water.
It is necessary to search for the source of environmental friendly energy and renewable.Solar, wind, sea, water, electromagnetic, electrostatic, thermal, vibration, and movement of the human body are all kinds of renewable energy sources [1].In this analysis, the problem of the subject in the preparation of this study are: 1) What is the greatest power generated by each of the differences, thick, and the slope angle of the pontoon to the generated power?2) What is the use of arc with a certain thickness to obtain the number of rounds and the most optimal time? 3) What is the use of ballasts, to obtain the greatest power and the number of revolutions with a specific time greatest?While the purpose of this study was to answer the question above.

II. METHOD
The methodology to be used in completing this research is through modeling approaches with 1:10 scale from actual size.Then it will be tested.International Journal of Marine Engineering Innovation and Research, Vol. 1(2), Mar. 2017. 114-119 (pISSN: 2541-5972, eISSN: 2548-1479)

A. Onshore Test
The test is conducted by assembling a pontoon which there is a segment with a 30 ° angle, with each -each a thickness of 1 mm, 2 mm, 3 mm.then with a buffer as shown in the picture 3.1, will be tilted at an angle 5 o , 15 o , 30 o , 45 o , 60 o .This experiment will be known from the number of revolutions during the time stops.Table 3.1 shows the experimental results on a pontoon using a pie with a certain angle.

B. Offshore Test
Testing of off-shore is a test in the water or in the pool using ballasts with a depth of 12 cm, 15 cm, 17.5 cm measured on the one part thereto, as shown in the Figure 2. Tests on ballasts system is almost the same as on-shore testing only place using water medium.The experimental results are shown by Table 2.It uses ballasts 12 cm, 15 cm, 17.5 cm with a thickness of 1 mm.
Pontoon filled with ballasts 12 cm, 15 cm, 17. 5 cm, then given a pendulum with a 30 ° angle with a thickness of 1mm, 2mm, 3mm.After that the new pontoon tilted with a slope of 5 o , 15 o , 30 o , 45 o , 60 o  International Journal of Marine Engineering Innovation and Research, Vol. 1(2), Mar. 2017. 114-119 (pISSN: 2541-5972, eISSN: 2548-1479) 116 In the off-shore testing will be performed calculations to determine the power generated at each arc with a certain thickness.The following data processing on -shore in theory and practice by using a segment with a 30 ° angle with a thickness of 1 mm with a slope of 60° arc.
In accordance with the above formula, the obtained Furthermore, after the above table to calculate the value of omega, torque, power.Calculations can be done on each test.
Data from the table above will be analyzed using next graph.For data on-shore will be analyzed with a difference theory with practical work and the influence of thickness on each plate of the power generated, and the number of revolutions of the pendulum with a stop at a certain slopes.

A. Offshore Test
Here's one example, Data Analysis shown in the analysis of the on-shore testing theoretical and practical calculations.
In this graph shows that the theoretical value is greater than the lab.30 ° angle thick one, with slope of 5 o is 0004 watts, the power generated by the lab 0 watts.Then at the angle of 15 o theoretically generated power 0035 watt in lab 0 watts.At the angle of 300 power theoretically produced 0132 watts of power generated in the lab 0006 watts.The tilt angle of 45 ° is theoretically generated power 0277 watt, 0007 watt in the lab.At the angle of the theoretical power of 600 watts in a practicum 0443 0009 watts.
In theory and practice produce nearly the same graph, where the greater the tilt angle, the greater the power generated.Likewise happens in each arc that has a certain thickness, the shape of the graph obtained relatively the same, Then in graph theory and practicum one example on the graph below, the arc angle 30 ° with a thickness of 1 mm.From here it can be seen that the theoretical and practical work together to increase in the angle of the greater power even though the difference between practical and theoretical approximately less than 20%.This is because the error readings, and bearings that are used during the test was also very influential.

B. Onshore Test
Analysis of On-shore in the lab, the arc with the 300, 1mm thick, 2 mm, 3 mm.
In this lab arc with 1mm thick, the angle of 300, has a value of omega most big that0.651rad / s in which the number of rotation 3 times the time it takes 4.61 s.With a thickness of 2 mm, tilt angle 300memiliki omega greatest value is 0839 rad / s in which the number of revolutions produced 4 times within 4.77 s.In the arc with a thickness of 3 mm, the angle of 300, has a value of omega 0938 rad / s.Then the most lucrative time rotation compared with the largest is the arc at an angle of 600, at an angle of 300 with a thickness of 3 mm number of rounds produced 5 times and the time it took 5:33 s, 0938 rad / s In the graph above shows that omega generated not depending on the thickness and the angle of inclination, this is because at trial the greater the angle of this case could lead to a pendulum that works more quickly stopped because of the influence of the waves.

V. CONCLUSION
Based on the discussion in the previous chapter, can be summarized as follows: 1. Calculations using the theory was found that the greater the weight of the pendulum or the pendulum angle and the thickness of the power generated will be even greater.2. In the On-shore testing arc angle of 300, the largest power produced at a thickness of 3 mm at an angle of 600, the generated power 0036 watt.3. Value omega (rad / s), the largest in the arc angle of 300, with a thickness of 1 mm, 2 mm, 3 mm.The greatest value at the angle of 300, with a thickness of 3 mm, number of revolutions produced 5 times with a time of 5:33 s, omega values obtained 0938 rad / s. 4. Off-shore testing with the ballasts 12 cm on the arc angle of 300, the largest power produced at a thickness of 3 mm at an angle of 600, the generated power 0037 watt. 5. Off-shore testing with the ballasts 12 cm, the value of omega (rad / s), the largest in the arc angle of 300, with a thickness of 1 mm, 2 mm, 3 mm.The greatest value at the angle of 600, with a thickness of 3 mm, number of revolutions produced seven times at 9:53 s, omega values obtained 0735 rad / s. 6. Off-shore testing with the ballasts 15 cm on the arc angle of 300, the largest power produced at a thickness of 3 mm at an angle of 600, the generated power 0041 watt.7. Off-shore testing with the ballasts 15 cm, the value of omega (rad/s), the largest in the arc angle of 300, with a thickness of 1 mm, 2 mm, 3 mm.The greatest value at the angle of 450, with a thickness of 2 mm, the number of revolutions produced six times with a time of 7:08 s, omega values obtained 0847 rad/s.8. Testing Off-shore with ballasts 17.5 cm on the arc angle of 300, the largest power produced at a thickness of 3 mm at an angle of 600, the generated power 0032 watt.9. Testing Off-shore with ballasts 17.5 cm, the value of omega (rad/s), the largest in the arc angle of 300, with a thickness of 1 mm, 2 mm, 3 mm.The greatest value at the angle of 300, with a thickness of 2 mm, the number of revolutions produced three times with a time of 3:54 s, omega values obtained 0847 rad/s.

Figure
Figure.1.On-shore test
Figure. 3. The scheme of the arc

TABLE 3 .
THE RESULTS OF THE EXPERIMENT 1MM THICKNESS, 15 CM BALLAST

TABLE 2 .
THE RESULTS OF THE EXPERIMENT 1MM THICKNESS, 12 CM BALLAST

TABLE 4 .
THE RESULTS OF THE EXPERIMENT 1MM THICKNESS, 17,5 CM BALLAST

TABLE 6
Figure. 4. Ratio of power in theory with practical results in the power arc with a 30 ° angle 1 mm thick