Browsing by Author "Reddy, B.R.P."

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Influence of temperature on the vibration control of the laminated composite sandwich plate with a 3D printed PLA core
(American Institute of Physics Inc., 2023) Kallannavar, V.; Kattimani, S.; Reddy, B.R.P.
The current study looks at the effect of temperature on the vibration control properties of a laminated composite sandwich plate. The sandwich plates fabricated using the glass-epoxy composite face sheets and the 3D printed PLA core are used for the study. Three PZT5H piezoelectric patches are used for actuating, sensing, and controlling the laminated composite sandwich plate. The proportional controller with constant control gain is utilized to control of vibrating sandwich plate operating at 10Â° C, 20Â° C, and 30Â° C thermal environments. The proportional controller was designed in the basic LABVIEW programming platform. The physical analog input/output modules and amplifier units are effectively utilized to control the oscillating cantilever sandwich plate. The investigation revealed that the vibration attenuation characteristics of the PZT5H patch-assisted proportional controller increase with the increase in temperature. Â© 2023 Author(s).
Synthesis of Fatty Acid Methyl Esters (FAME) from Schizochytrium Marine Microalgae oil
(2018) Reddy, B.R.P.; Reddy, N.R.; Manne, B.
Fatty acid methyl esters (FAME) also called and accepted as biodiesel, obtained prominent importance in this new era as an alternate fuel for petro-diesel. Microalgae are identified as few of such feedstock for the production of biodiesel. Higher volumes of production per hectare area, fast growing ability and high oil contents are the major advantages of microalgae over the conventional oil yielding crops. Schizochytrium is one of marine microalgae and high lipid content of this microalga is ideal for production of biofuels. Also, Schizochytrium oil is found to have 0.1% free fatty acid content which is well within the recommended value for one-step alkaline transesterification. In this work, the synthesis of bio-diesel was carried out from Schizochytrium oil with the addition of potassium methoxide (a mixture of methanol and KOH). Aiming at the higher yield of FAME, essential amounts of methanol, catalyst, and reaction time were optimized. The yielding of FAME was confirmed by Gas Chromatography with Mass Spectroscopy (GC-MS) for each trial of experiment. A conversion efficiency of 99.99% was observed through GC-MS analysis for a 30% v/v methanol, 0.4% w/v KOH and 90 min reaction time at reaction temperature of 60�C. The results were complemented by proton nuclear magneto resonance (1H NMR) spectra and it is found that the synthesized fuel properties are well within the limits of ASTM standards. � 2018 Elsevier Ltd.
Synthesis of Fatty Acid Methyl Esters (FAME) from Schizochytrium Marine Microalgae oil
(Elsevier Ltd, 2018) Reddy, B.R.P.; Reddy, N.R.; Manne, B.
Fatty acid methyl esters (FAME) also called and accepted as biodiesel, obtained prominent importance in this new era as an alternate fuel for petro-diesel. Microalgae are identified as few of such feedstock for the production of biodiesel. Higher volumes of production per hectare area, fast growing ability and high oil contents are the major advantages of microalgae over the conventional oil yielding crops. Schizochytrium is one of marine microalgae and high lipid content of this microalga is ideal for production of biofuels. Also, Schizochytrium oil is found to have 0.1% free fatty acid content which is well within the recommended value for one-step alkaline transesterification. In this work, the synthesis of bio-diesel was carried out from Schizochytrium oil with the addition of potassium methoxide (a mixture of methanol and KOH). Aiming at the higher yield of FAME, essential amounts of methanol, catalyst, and reaction time were optimized. The yielding of FAME was confirmed by Gas Chromatography with Mass Spectroscopy (GC-MS) for each trial of experiment. A conversion efficiency of 99.99% was observed through GC-MS analysis for a 30% v/v methanol, 0.4% w/v KOH and 90 min reaction time at reaction temperature of 60Â°C. The results were complemented by proton nuclear magneto resonance (1H NMR) spectra and it is found that the synthesized fuel properties are well within the limits of ASTM standards. Â© 2018 Elsevier Ltd.