EPI International Journal of Engineering

A Field study on oscillating pontoon wave energy converter (WEC) performance in nearby Muarabaru, North Jakarta.

2026-05-31T01:24:47+00:00

Abstract

Two-thirds of Indonesia's territory is sea waters with different wave heights according to local geographical conditions. And only with the mastery of technology, wave energy can be converted into electrical energy which is priceless. This paper aims to determine the performance of a wave energy converter (WEC) device based on a damped forced vibration system. The WEC set consists of a marine structure measuring 3.00 meters high, 2.00 meters wide, and 2.00 meters long; a two-dimensional heaving-pitching gearbox as a power take-off (PTO) and a pontoon type “H” beam measuring 2.96 meters long, 0.92 meters wide. The research was conducted by field testing on a 50-meter coastline measured from the low tide shoreline of nearby Muarabaru, North Jakarta, for 24 hours from high tide to the next which is done every 6 hours. The research results show that:

The output power generated by the heaving motion is = 36.25 Watts,
The efficiency value due to heaving = 25.87%
The output power generated by the pitching motion is = 37.9 Watt,
The efficiency value due to pitching = 27.30%

Keywords: damped forced vibration system; performance of WEC; pontoon type "H" beam; power take-off (PTO); two-dimensional heaving-pitching gearbox

SMART SENSING FLUID FLOW DEVICE FOR MID STREAM PROCESS IN OIL AND GAS INDUSTRY

2026-05-31T06:14:37+00:00

In petroleum industries the storage tanks have a real problem of handling and management of fuel quantity. Various devices are used to
monitor fuel quantity in storage tanks or boozers, such as flow sensors, level sensors, float switches, analog meters, most commonly probes
and manuals. In this regard, we propose digital system to find out the amount of fuel in liters or milliliters in the storage tank.
Main objective of this project is to develop a digital display which portrays the precise quantity of fuel being poured into a storage tank or
fuel container. This display will help to verify the amount of fuel filled at petrol stations. Currently, the manual process of recording fuel
readings is time-consuming and tedious. By implementing this proposed system, customers will save time by receiving an exact reading
without the need for double-checking the tank or container.
Lately, there have been frequent reports of fuel station fraud, where stations have pumps that display an inflated amount of fuel filled, while
the actual quantity poured into the customer's vehicle is much less. In Pakistan, most cars are equipped with analog fuel meters, which do
not provide an accurate measure of the fuel level or allow customers to verify the amount of fuel filled at a station.