Nur Faeza Farhana Anggu (2022) Light emitting diode (led) illuminance in underwater environment for marine aquaculture. Universiti Malaysia Sabah. (Unpublished)
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Abstract
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. The underwater lighting equipment consist of Light Emitting Diode (LED) module, wind generator, turbine blades and rechargeable lithium-ion battery. The underwater lighting will use wind power to generate electricity where then will be stored inside 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 5 V 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 0.1 m, the illuminance of deep sky-blue LED is 812 lux while red colour of LED has illuminance of 52 lux. 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 3.67 V while both cyan and deep sky blue colour of LED required the lowest minimum voltage to reach 20 lux of illuminance with value of 2.36 V and 2.39 V respectively. For the validation part, the value of HSubmerged Theoretical for 1 m length of floating station pipe with weight of 3.4 kg is 0.474 m while the value of HSubmerged Theoretical obtained from buoyancy test is in the range of 0.438 m until 0.556 m. The average percentage errors obtained by comparing the value of submersion height is 7.80%. However, the complete prototype with 1 m of floating station with weight 3.4 kg was placed inside it is fast tilting and unstable. On the other hand, the complete prototype with 2 m of floating station and 8.75 kg weight placed inside the floating station can be stable as float in seawater. Based on the buoyancy test, the prototype became more stable as the average HSubmerged Experimental increase. When the average HSubmerged Experimental small which is 1.29 m the prototype fast tilting and unstable and become vertical and constantly stable as the average HSubmerged Experimental increase to 1.5 m.
| Item Type: | Academic Exercise |
|---|---|
| Keyword: | Light emitting diode , LED , Sustainable underwater , Marine aquaculture |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1-9971 Electrical engineering. Electronics. Nuclear engineering > TK7800-8360 Electronics |
| Department: | FACULTY > Faculty of Engineering |
| Depositing User: | DG MASNIAH AHMAD - |
| Date Deposited: | 11 Oct 2022 11:56 |
| Last Modified: | 11 Oct 2022 11:56 |
| URI: | https://eprints.ums.edu.my/id/eprint/34372 |
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