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Jyoti Yadav Dinesh Yadav Rajat Vashistha D. P. Goyal 《International Journal of Green Energy》2019,16(3):242-255
In this work, an attempt has been made to harvest green energy from piezoelectric material using fluid flow in a conduit. Piezoelectric Energy Harvesting using Fluid Flow (PEHF) experimental model has been designed and the outputs obtained are compared with results obtained from simulations using ANSYS (computational fluid dynamics) and also with the mathematical modeling. The PEHF model has been utilized to analyze the effect of flow rate of water with reference to energy extracted. The full wave bridge rectifier and voltage doubler circuits have been used to obtain the direct current (DC) from the PEHF model. It is observed that the output obtained using experiments holds good in agreement with the results retrieved through simulations and mathematical results. The increase in flow rate of fluid leads to initially increase and then decrease in output of PEHF model as the maximum energy generated when flow rates (external force) matches with the frequency of excitation of the systems, i.e., at its resonance. The maximum energy output is generated at its resonance frequencies. It is observed that the full wave bridge rectifier circuit gives greater output as compared to a voltage doubler circuit. 相似文献
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The hydrophilic nature of cellulose fibers often results in poor compatibility with hydrophobic polymer matrices. Therefore,
it becomes necessary to modify the surface of natural fiber for better binding between fiber and matrix. Chemicals are commonly
used for the modification of cellulosic materials but large amount of solvents are usually involved. Microwave radiation induced
grafting is one of the promising methods for the surface modification of natural fibers. In the present paper, we have reported
the microwave radiations induced grafting onto sisal fibers (Agave sisalana) using methyl methacrylate monomer, which has been compared to the surface modification of sisal fibers using bacterial cellulase.
The effects of these treatments on the properties of sisal fibers are discussed in the present paper. The modified fibers
were characterized by scanning electron microscopy, X-ray diffraction, and thermogravimetric analysis/differential thermal
analysis techniques to determine their morphology, crystallinity and thermal stability. 相似文献
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Bishnoi M Arora S 《Journal of environmental biology / Academy of Environmental Biology, India》2007,28(2):291-294
The fluoride concentration in ground water was determined in ten villages of Rohtak district of Haryana state (India). The fluoride concentration in the underground water of these villages varied from 0.034-2.09 mg/l. Various other water quality parameters, viz., pH, electrical conductivity, total dissolved salts, total hardness, total alkalinity sodium, potassium, calcium, magnesium, carbonate, bicarbonate, chloride and sulfate were also measured. A systematic calculation of correlation coefficients among different physicochemical parameters indicated considerable variations among the analyzed samples with respect to their chemical composition. Majority of the samples do not comply with Indian as well as WHO standards for most of the water quality parameters measured. Overall water quality was found unsatisfactory for drinking purposes. Fluoride content was higher than permissible limit in 50% samples. 相似文献
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Kumar Pankaj Mishra Vandana Yadav Shalu Yadav Archana Garg Shafali Poria Pankaj Farooqi Furqan Dumée Ludovic F. Sharma Radhey Shyam 《Environmental science and pollution research international》2022,29(40):60212-60231
Environmental Science and Pollution Research - A sectorial approach for assessing heavy metal pollution in rivers neglects the inter-relationship between its environmental compartments and thus... 相似文献
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