Demand for energy is growing fast worldwide amid depletion in conventional non-renewable resource... more Demand for energy is growing fast worldwide amid depletion in conventional non-renewable resources. Bangladesh being hugely dependent on expensive imported fuel is forced to search for alternative renewable resources such as solar and biomass etc. This paper investigates the potential of the sap of a widely available plant called Bryophyllum pinnatum (life plant) as an electrolyte for use in a battery to generate electricity. The objective is to analyze the cell and optimize its design parameters which will help develop a cost-effective battery. A manually operable mechanical device has been designed and built to squeeze juice from the leaves. The results of the experiment and major parameters affecting the performance of the cell have been discussed in this paper. We identified the major parameters affecting the development of potential difference in a cell between copper and zinc electrodes and short circuit current by varying some parameters of electrodes immersed into the Bryoph...
Solar photovoltaic (PV) based mini-grid systems have the potential to be an environmentally frien... more Solar photovoltaic (PV) based mini-grid systems have the potential to be an environmentally friendly and sustainable long term solution for electricity access in Bangladesh. However, to be a successful and cost effective solution, the longevity of these mini-grids with its expensive components is a vital issue. In this paper, we have investigated the potential problems those could hamper the performance of the ac mini-grid system using dc appliances.Specifically the problems those may arise due to harmonic injection from the load side and can eventually reduce the longevity. The investigation is based on a practical design of a solar PV- Diesel-Battery hybrid minigrid to be deployed atNoonertekisland, under Narayanganj district, Bangladesh. A miniature prototype capable of serving a single consumer has been built and measurement for different load combinations comprising of 7.5 and 9 watt LED bulbs, 25 watt DC fans and 14" ac color TV are carried out using DSO(Digital Storage O...
Currently only 53 percent of total population in Bangladesh has access to electricity and per cap... more Currently only 53 percent of total population in Bangladesh has access to electricity and per capita generation being 265 kWh is very low compared to some other developing countries. This shortage of energy hinders the growth of the country’s overall economy. However, Bangladesh has a good potential for harnessing renewable energy resources, solar and biomass in particular. Steps are taken to harness renewable sources of energy to make the country less dependent on the traditional fossil fuels. This paper presents current power generation scenario in Bangladesh, assesses the availability of solar irradiation and potential for power generation using solar PV panels. This paper also investigates into the current status of dissemination of PV based solar home systems (SHSs) in the rural areas of Bangladesh. Currently approximately 94 MW of power is generated from around 2 million SHSs already installed. Average growth rate of SHSs from 2003 up to December 2012 is around 58% which is am...
International Journal of Electronics and Electrical Engineering
In the last five years, Bangladesh has been successful in increasing its production of electricit... more In the last five years, Bangladesh has been successful in increasing its production of electricity significantly. However, a large number of people in the remote areas remain unconnected to the national grid. Alternate solutions to provide them with power are of utmost important to improve their livelihoods and quality of lives. Some earlier researches have shown a good prospect of producing electricity from the juice of a plant called Bryophyllum Pinnatum. In this paper, the design of a prototype of a 12 VDC battery has been proposed. Its performance has been investigated. Juice extracted from Bryophyllum Pinnatum was used as electrolyte, because it is acidic in nature. It has been shown that in order to increase the electrical potential of the electrolyte, the pH value of the sap can be reduced and make it more acidic in nature by adding vinegar or lemon juice. The pH value of Bryophyllum juice was reduced from 4.61 to 3.09 by adding equal amount of lemon juice. All these ingredients are widely available and relatively inexpensive. Such a battery can be made locally in the rural areas and can meet the lighting and other needs of rural households.
Demand for energy is growing fast worldwide amid depletion in conventional non-renewable resource... more Demand for energy is growing fast worldwide amid depletion in conventional non-renewable resources. Bangladesh being hugely dependent on expensive imported fuel is forced to search for alternative renewable resources such as solar and biomass etc. This paper investigates the potential of the sap of a widely available plant called Bryophyllum pinnatum (life plant) as an electrolyte for use in a battery to generate electricity. The objective is to analyze the cell and optimize its design parameters which will help develop a cost-effective battery. A manually operable mechanical device has been designed and built to squeeze juice from the leaves. The results of the experiment and major parameters affecting the performance of the cell have been discussed in this paper. We identified the major parameters affecting the development of potential difference in a cell between copper and zinc electrodes and short circuit current by varying some parameters of electrodes immersed into the Bryoph...
Solar photovoltaic (PV) based mini-grid systems have the potential to be an environmentally frien... more Solar photovoltaic (PV) based mini-grid systems have the potential to be an environmentally friendly and sustainable long term solution for electricity access in Bangladesh. However, to be a successful and cost effective solution, the longevity of these mini-grids with its expensive components is a vital issue. In this paper, we have investigated the potential problems those could hamper the performance of the ac mini-grid system using dc appliances.Specifically the problems those may arise due to harmonic injection from the load side and can eventually reduce the longevity. The investigation is based on a practical design of a solar PV- Diesel-Battery hybrid minigrid to be deployed atNoonertekisland, under Narayanganj district, Bangladesh. A miniature prototype capable of serving a single consumer has been built and measurement for different load combinations comprising of 7.5 and 9 watt LED bulbs, 25 watt DC fans and 14" ac color TV are carried out using DSO(Digital Storage O...
Currently only 53 percent of total population in Bangladesh has access to electricity and per cap... more Currently only 53 percent of total population in Bangladesh has access to electricity and per capita generation being 265 kWh is very low compared to some other developing countries. This shortage of energy hinders the growth of the country’s overall economy. However, Bangladesh has a good potential for harnessing renewable energy resources, solar and biomass in particular. Steps are taken to harness renewable sources of energy to make the country less dependent on the traditional fossil fuels. This paper presents current power generation scenario in Bangladesh, assesses the availability of solar irradiation and potential for power generation using solar PV panels. This paper also investigates into the current status of dissemination of PV based solar home systems (SHSs) in the rural areas of Bangladesh. Currently approximately 94 MW of power is generated from around 2 million SHSs already installed. Average growth rate of SHSs from 2003 up to December 2012 is around 58% which is am...
International Journal of Electronics and Electrical Engineering
In the last five years, Bangladesh has been successful in increasing its production of electricit... more In the last five years, Bangladesh has been successful in increasing its production of electricity significantly. However, a large number of people in the remote areas remain unconnected to the national grid. Alternate solutions to provide them with power are of utmost important to improve their livelihoods and quality of lives. Some earlier researches have shown a good prospect of producing electricity from the juice of a plant called Bryophyllum Pinnatum. In this paper, the design of a prototype of a 12 VDC battery has been proposed. Its performance has been investigated. Juice extracted from Bryophyllum Pinnatum was used as electrolyte, because it is acidic in nature. It has been shown that in order to increase the electrical potential of the electrolyte, the pH value of the sap can be reduced and make it more acidic in nature by adding vinegar or lemon juice. The pH value of Bryophyllum juice was reduced from 4.61 to 3.09 by adding equal amount of lemon juice. All these ingredients are widely available and relatively inexpensive. Such a battery can be made locally in the rural areas and can meet the lighting and other needs of rural households.
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Papers by Riazul Hamid