Sustainable Underwater Fish Attractor (SUFA)

Sustainable underwater lightings were developed to be use as a fish attractor for fisherman living in the coastal area within Malaysia and navigation aid for divers. Several tests were performed to measure the efficiency of the developed underwater lighting-powered wind turbine. The underwater lighting equipment consist of Light Emitting Diode (LED) module, wind generator, turbine blades and rechargeable lithium-ion battery. For the LED module test, the illuminance of eight different colours of LED was studied which are white, green, blue, red, yellow, purple, cyan and deep sky blue. Based on the result obtained, the illuminance of all colours of LED will decrease as distance between LED and light meter increase when 5V of voltage supplied to the LED. Deep sky blue colour of LED has the highest illuminance while red colour of LED has the lowest illuminance. As an example, when the distance between LED and light meter is 0.1m, the illuminance of deep sky blue LED is 812lux while red colour of LED has illuminance of 52lux. Next, the minimum voltage for all colours of LED to reach 20 lux of illuminance increase as distance between LED and light meter increase. Red colour of LED required the highest minimum voltage with a value of 3.67V while both cyan and deep sky blue colour of LED required the lowest minimum voltage to reach 20lux of illuminance with value of 2.36V and 2.39V respectively. For the wind turbine, the horizontal axis wind turbine was subjected under a minimum of 2 m/s wind speed of a set of blower fans where the produced minimum produced was 3V. The generated power output from the wind turbine will charge into the power bank of four dry cells of 2000mAh thus generating power into the LED illumination. The three bladed wind turbine was tested using different sizes of 33cm and 40 cm blade length, where the larger blade size was preferred for a lower wind speed with minimal output with a constant charge into the power supply.

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