Browsing by Author "Saime, M.A.,"

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A study on pkl electrochemical cell for three different conditions
(Springer Science and Business Media Deutschland GmbH, 2019-12-29) Khan, K.A.,; Saime, M.A.,; Hazrat Ali, M.,; Zian Reza, S.M.,; Alam, N.,; Afzol Hossain, M.,; Rab, M.N.F.,; Islam, S.
It has been conducted this research work to measure the short-circuit current (Isc) and capacity (C = AH) for different conditions of the PKL (Pathor Kuchi Leaf). The copper and zinc plates have been embedded between the two ends of the PKL for three different conditions like fresh leaves, dry leaves and living leaves to make PKL electrochemical cells. The plates were kept tightly binding by plastic clips. A sophisticated multimeter was used to measure the short-circuit current (Isc). The short-circuit current was recorded after 12 h interval. It was seen that the obtained maximum current was 0.7 A for living PKL tree and the minimum current was recorded for dry PKL about 0.10 A for dry PKL. The variation between maximum and minimum short-circuit current difference is for dry PKL is 0.14 A, for fresh PKL is 0.10 A and for living PKL tree is 0.00 A. The maximum capacity was 67.2 AH for living PKL tree and the minimum capacity was 2.16 AH for dry PKL. This type of works has been conducted by us for the first time in Bangladesh. It will help the poor for practical power applications with solar photovoltaic systems. There are some differences from the SPV (Solar Photovoltaic System). The SPV system did not work at night and rainy season. But these PKL power woks equally both day and night time. Furthermore, the PKL power technology is new and innovated technology in Bangladesh whereas the SPV device was innovated by a Russian scientist. For better performance of the PKL electrochemical cell, Some Performance and operation characteristics of the PKL electrochemical cell like input–output curves, efficiency curves, heat rate and incremental curves have been conducted. Finally, the performance of the PKL electrochemical extract cell has been studied by magnetic stirrer with hot plate. It is found that the performance of the PKL cell increases after making oscillation for PKL filtered extract by magnetic stirrer with hot plate.
PKL Backup LED Bulb—An Alternative Source of Electricity During Load Shading
(Springer Science and Business Media Deutschland GmbH, 2021-12-30) Khan, K.A.; Islam, S.,; Rasel, S.R.,; Saime, M.A.,; Islam, S.,; Ali, M.H.
Load shading is a great crisis of Third World countries. It is happening in the Third World countries frequently. To overcome this situation, instant and sudden electricity with PKL backup LED bulb has been studied. In this research paper, PKL has been divided into 3 categories: fresh PKL, living PKL and the effect of Ag NPs for living PKL tree. A beautiful and innovative idea has been designed and developed to extract power from the living PKL tree, fresh leaves and the use of Ag NPs for living PKL backup LED bulb, which may be an eternal source of electricity during load shading. In this research work, an LED bulb has been considered as a load. An internal circuit is considered inside the LED bulb. The LED bulb acts as a load and storage system simultaneously. A small storage battery has been used inside a PKL backup LED bulb. A charge controller is also used with the storage battery to save the storage battery. Charge Controller saves the storage battery from overcharging and undercharging. It is shown that the longevity of the PKL backup LED bulb for a single fresh leaf is 20 h, for a living leaf it is above 20 h, and it is also found that the voltage was constant for using Ag NPs. The intensity variation with time duration for the above-mentioned 3 cases has also been studied. The LED bulb has been functioning by using electricity that has been extracted from the living and fresh Pathor Kuchi (Bryophillum pinnatum) leaves directly, and that is the novelty of this research work. This work is very innovative, a new and unique research work all over the world. It may be the guideline for future work.
Solar medical sterilizer using pressure cooker for rural off-grid areas
(Springer Science and Business Media Deutschland GmbH, 2019) Khan, K.A.,; Rasel, S.R.,; Zian Reza, S.M.,; Saime, M.A.,
To design and develop a prototype, solar medical steam sterilizer for use in remote areas around the world. A paraboloidal dish-type concentrator was used as a collector and a pressure cooker was used as a receiver/absorber. The concentrator and receiver (C–R) system was used as a medical sterilizer. To increase the reflectance of the concentrator, aluminum foil was used as cover to reflect the solar radiation on to the bottom of the pressure cooker. The bottom of the pressure cooker was coated by normal black body. The pressure cooker gained temperature and pressure. A thermocouple was used to measure the temperature, and pressure gauze was used to measure the pressure, respectively. The solar beam radiation was measured by pyrheliometer. The required temperature was 121 °C, and the pressure was 1.05 kg/cm2 which were obtained, and those were measured by thermocouple and pressure gauze, respectively. When the obtained temperature 121 °C and pressure 1.05 kg/cm2 was kept for 15 min mixed with medical instruments and water, and then it was tested at ICDDRB and BCSIR at Dhaka, Bangladesh and shown that these medical instruments were sterilized properly. The cost of the whole system was around 90 USD. It has been used as a paraboloidal dish-type concentrator, a pressure cooker, and medical instruments mixed with water which makes a solar steam medical sterilizer.