KnE Social Sciences | 3rd UNJ International Conference on Technical and Vocational Education and Training 2018 (3rd ICTVET 2018) | pages: 491–497

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1. Introduction

As archipelago country, Indonesia has thousands islands among equator lines, from Sabang to Merauke, with 5,9 million km square width, consists of 3.2 million km2 territorial space and 2.7 km2 Exclusive Economic Zone and 2/3 of the territory is sea, the area does not include the continental shelf. This makes Indonesia the largest archipelagic country in the world [1]. Certain, with that fact, Indonesia has many resources. But, unfortunately, those resources failed to enhance fisherman's life quality, because there are many illegal fishing which done by foreign boat. Illegal fishing activities carried out by state fishermen from countries that are illegal. Through various modus operandi of fishermen released in Indonesia and then traded outside Indonesia with multiple profits. Illegal arrest [2] data from Auditing Board of Republic Indonesia, in 2013, showed potential income from fishery is 365 trillion rupiah for a year, but, because of illegal fishing, decrease, regarding on Ministry of Marine and Fishery, to 65 trillion rupiah for a year. It means hundreds trillion rupiah missing [3].

Government already do efforts like arresting, burning, and drowning every boats which did illegal fishing. Because this needs good navy quantity, what government do is ineffective, and also can start political conflict with country of the boat comes from. In order to solves the problem, there must be an equipment to track every foreign boat movement in Indonesia territory, and the equipment is Power Wave AUTOMASS (Automatic Maritime Security System) which utilized Acoustimeter Radio Frequency Detector to detect radio signal that the boat use. This system energized by electricity from converting wave energy. Placing Power Wave AUTOMASS in whole Indonesia's ocean and connect them with each other can monitor foreign board well. This monitoring will help government to reduce illegal fishing in Indonesia.

The problem at the moment is how to design a sea wave power plant needed by AUTOMASS which can detect ships well in the Indonesian ocean. This technology, expected, can enhance fisherman life quality and develop Indonesia fishery sector, thus, nation compete skill increase, like government has planned. This research is develop the previous research about ocean power plant which combine wave power plant [4] and Wave Powered Generator from Raichlen et al [5] and Wave Motor patent from Mordechai Welczer et al [6].

Ocean power plant system is converting ocean vertical wave become kinetic energy to pump water into reservoir in order to whirl turbine which connected to generator. This system place pump piston and pump cylinder under ocean. Generator connect directly to load. On AUTOMASS Power Wave, electricity generate from ocean vertical wave, which place pump cylinder and connect to pontoon and pump piston under ocean. Electricity will scan radio signal and thermal boat to monitoring foreign boat in Indonesia's ocean.

2. Methods and Equipment

Methods

The research method used in this study is a design analysis including Study Literature, Wave data retrieval and BMKG satellite image data, system design, determination of design size, simulation and analysis of the reliability of system design.

Figure 1

Research stage.

fig-1.jpg
  • Pre-Research, This stage identifies the problem based on the background of the problem to be resolved. These general problems include the need for offshore electricity development that can be used as an electricity source for tracking the movement of foreign vessels in the archipelago that do illegal fishing

  • Study Literature, This stage conducts a literature study of the types of plants that are most suitable as a source of electricity for tracking the movement of foreign vessels in the archipelago that do illegal fishing

  • Field and satellite data retrieval, his stage collects satellite data from BMKG, the initial survey location for the application of AUTOMASS Power Wave

  • Calculate energy conversion, his stage performs a mathematical calculation of the conversion of wave energy into motion energy, pressure and electrical energy.

  • Analysis, This stage analyzes the electrical energy generated by high data and wave periods obtained from satellite imagery, the Meteorological and Geophysical Agency and direct measurements with a predetermined system size.

  • Conclusion, This stage concludes the amount of electrical energy generated as an electricity source for AUTOMASS Power Wave.

Equipment

The equipment used in this study is a generating unit consisting of pontoons, reservoirs, turbines and generators. measurement of wave height using a slide rule, measurement of wave period using stopwatch

3. Results

Power Wave AUTOMASS is a system that detects radio waves and heat by using energy from ocean wave energy. The existence of the ship can be detected by using the Radio Frequency Detector Acoustimeter to detect the radio waves used and the Infrared Sensor to detect heat, the information about the next shipment will be sent to a data center through a network of radio waves connected between Power Wave AUTOMASS

Figure 2

Ship Wave Detection Design in Power Wave AUTOMASS.

fig-2.jpg
Figure 3

Block diagram of the ship detection unit in Power Wave AUTOMASS.

fig-3.jpg

While the electrical energy needed by the system is obtained from ocean wave energy by converting vertical energy waves into motion energy to pump seawater into the reservoir pressurized to rotate the water turbine connected to the electric generator by placing the pump piston directly connected to the pontoon and the pump cylinder mounted on the base the sea.

Figure 4

Power Wave AUTOMASS design.

fig-4.jpg

4. Discussion

Table 1

Calculation simulation.


The results of the study will only be presented in the field of power wave design that will be used as a source of electrical energy for AUTOMASS

  • Constants

  • Calculation AssumptionsMaximum wave height (h) = 1m, wave period (T) = 4s, the wave is assumed linear, turbine efficiency of 60%, generator efficiency of 80%, transmission efficiency of 90%.

  • System SizePonton volume 50 liter, Piston diameter (D 1 ) = 8 inch diameter output (D out ) = 1 inch, the length of the piston step = 100 cm.

  • Buoyant forcewith a volume of 15 liter pontoons produce a buoyancy force of 76 N

  • Incoming water speed (V1)Incoming water speed is pump stride length per unit time, the water inlet velocity of 0.25 m/s.

  • Pump inlet pressure (P1)With 8 inch pipe diameter (0.203 m), the size of the piston surface area is 0,032 m2. Because the pump inlet pressure is defined as the ratio of force to the surface area of the piston pump, the size of the pump inlet pressure of 2.334 N / m 2 .

  • Water exit speed (V2)1-inch diameter pipe output (0,025m), the amount of pump output surface area is 0,001 m2. Because of the magnitude of the speed of the water out is defined as the product of the ratio of the surface area of the piston (A1) and the speed of the water inlet (V1) with a surface area of the pump exit (A2) or V2 = (A1xV1) /A2, then the amount of water exit velocity of 16 m/s.

  • Exit pressure pump (P2)The magnitude of the pressure pump is a comparison of time pressure and the piston surface area to the surface area of the pipe exit. Exit pressure pump is 149.346 N/m 2 .

  • The water discharge (Q)Water discharge is defined as the volume of water displaced into the reservoir per unit time. discharge of water flowing into the reservoir was 0.0081 m3 /s, equivalent to a potential water energy of 14.8 m.

  • Electric Outputwith water discharge of 0.008 m3/s, water level equal to 14.8 m and turbine efficiency of 0.6%, the turbine output is 0.7 kW. With generator efficiency of 70% and transmission efficiency of 90%, then the electricity that can be generated is 509 watts

5. Conclusion

The results of the calculation of the power wave design with volume 15 liter ponton, piston diameter 8 inch, length of step 1 m assuming wave height 1 m, wave 2 period produces electrical energy of 509 watts, this energy can be used as a source of electricity for Automatic Maritime Security System (AUTOMASS) To Prevent Illegal Fishing.

References

1 

Lasabuda, Ridwan. (2013). Development of Coastal and Oceanic Areas in the Perspective of the Republic of Indonesia, Regional Development in Coastal and Ocean in Archipelago Perspective of The Republic of Indonesia. Platax Scientific Journal, vol. 1–2, January 2013. pp. 92-101.

2 

Muhammad, Simela Victor (2012). Illegal Fishing In Indonesian Waters: Problems And Efforts To Handling It In Bilateral Area. Journal of Politicia. Vol. 3 No. 1, Mei 2012. Pp. 59-84.

3 

Ruatam, Ismah. (2015). The challenges of ALKI in realizing Indonesia's ideals as a world maritime axis. Indonesian Perspective. Vol. 1 No. 1, January June 2015. pp 1 21.

4 

Subekti, Massus. 2009. Rancang Bangun Prototipe Pembangkit Listrik Tenaga Air Gelombang Laut (PLTA-GL). Prosiding Seminar Nasional Teknologi Industri (Teknoin). Yogyakarta: Universitas Islam Indonesia.

5 

Raichlen et al. (1986). Wave Powered Generator. United States patent, 4.594.853, June 17 th 1986

6 

Welczer, Mordechai et al. (1978). Wave Motor. United States Patent, 4.076.463, February, 28 th 1978

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ISSN: 2518-668X