iub Independent University, Bangladesh

EEE Student Implemented a Solar Power System in Fishing Trawler in the Bay of Bengal through his Master’s thesis

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Sajib Chakraborty, an MSc student of the Department of Electrical and Electronic Engineering (EEE) of Independent University, Bangladesh (IUB) implemented a solar power system in fishing trawler in the Bay of Bengal under supervision of Dr. M Abdur Razzak, Associate Professor and Head of the Department of Electrical and Electronic Engineering. For the very first time in Bangladesh solar power system is installed in a fishing trawler through this project. This project introduces Bangladesh with a new research field for solar power application, which will mitigate the power crisis for root level people like fishermen of Bangladesh.
Bangladesh is a riverine country having approximately 24,140 kilometers of 700 rivers surrounding Bangladesh including tributaries. Around 1,280,000 fishermen exist in Bangladesh with 770,000 inland and 510,000 marine fishermen whose income entirely depends on fisheries. Thereto a large of family in this country entirely depends on the fishery where the fishermen mostly use trawler for fishing purpose in the river and sea and their income mostly relies on a fishing trawler. Fishermen depart with trawler to deep sea or river for two to three weeks. During this time, trawlers require electric power for fishing and other purposes like cooking, charging mobile, signal light, search light, fishing light etc. at night. Currently, a dynamo coupled with trawler engine is generating electric power to fulfill power demand through the battery. This dynamo requires fossil fuel (mainly diesel) for generation purpose. Moreover, trawler dynamo is less efficient (~15%), low lifetime, originates greenhouse gasses (CO2, O3, CO, SO2), swell up the temperature and cumulatively add to global warming. In present scenario to fulfill electric power demand each trawler utilizes 30-35 liters of diesel in a trip at fishing time in sea or river.
This project tried to meet up the demand using renewable energy as Bangladesh is located in a semi-tropical region lying northeastern part of South Asia and its coordinate is 23.7000° N, 90.3500° E which acquires elevated irradiation of sun. Therefore, efficient utilization of solar energy system can be a great alternative for electricity generation in a fishing trawler. A Synchronous Buck Converter (SBC) is implemented for battery charging purpose which drives through novel Maximum Power Point Technique (MPPT) technique to meet the load demand in a fishing trawler. The proposed design is simulated and is implemented through hardware. The simulation and hardware results show high degree of correlation and confirm the sustainability of this system. Before departure to Bay of Bengal the system was tested for one week. Currently, system is running in full swing to meet the energy demand of trawler.
The project is implemented in “Fishery Ghat” under Sadar Ghat Thana in Chittagong, Bangladesh. Roughly 2000 trawlers are registered in “Fishery Ghat” under Sadar Ghat Thana only in Chittagong, Bangladesh. By designing a software model it is calculated that the total PV panels output of 2000 trawlers in each year is 640MW. The potential output from available roof surface of fishing trawlers in Chittagong City illustrates that it is a latent potential to meet up the energy challenge of Bangladesh government. The roof surface of Bangladeshi fishing trawler actually has no use. So the implementation of solar power system in fishing trawler will be a great resource. Moreover, this system reduces the use of 450 litre diesel per trawler per year. So, the amount of diesel requires per trawler in 20 years using the present electrical system is 9000 Litre which will save 24,300 kg CO2.
The economical feasibility of this project has also been analysed and it is seen that the solar power system in fishing trawlers is also economically feasible compared to the present conventional system. The total cost of the proposed product is only 35,000 BDT. The Life Cycle Cost Analysis (LCCA) of the product is mathematically modeled via software. The LCCA result specifies Saving to Investment Ratio (SIR) and Net Profit Value (NPV) of this renewable system is greater than 1.00 and also indicates BDT 478191.90 will be the net benefit for each trawler after 20 years of life time of the system which saves approximately Tk 2000 per trawler per month. This huge revenue may bring socio-economic change in life of Bangladeshi fishermen. This system is entirely green, free and economically feasible solution for trawler.