Contribution to the Improvement of the Earthing Resistance of Electrical Installations: Case of Tropical Zones Lands
Mathurin Gogom,
Rodolphe Gomba,
Desire Lilonga-Boyenga
Issue:
Volume 8, Issue 1, March 2020
Pages:
1-5
Received:
30 January 2020
Accepted:
18 February 2020
Published:
26 February 2020
Abstract: Optimizing the earthing resistance is still a challenge with regard to the damage that continues to occur in electrical installations due to the poor earth network. The research carried out to date does not take into account the diversity of soils often characterized by its intrinsic value of resistivity. The generalization of grounding techniques gives in some places high resistances of the ground circuit. In fact, much remains to be done in terms of optimizing the resistance of the earth circuit. This very exciting problem concerns not only industrial frequency circuits, but also high frequency circuits often meet in telecommunications. In this area, account must be taken of the reactance of the grounded rods, and therefore the impedance, which is often negligible at low frequencies, thus in this paper we present a comparative study of the variation of the earth resistance of the different types of soil depending on the length of the earth stake on the one hand, and on the diameter of the earth hole on the other hand. The interest of this work is to find an approach which would be allowed to realize an earth network having an optimal resistance whatever the type of soil.
Abstract: Optimizing the earthing resistance is still a challenge with regard to the damage that continues to occur in electrical installations due to the poor earth network. The research carried out to date does not take into account the diversity of soils often characterized by its intrinsic value of resistivity. The generalization of grounding techniques ...
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Biogas Purification by Alkali-based Column Washing Extracted from Wood Ash and Banana Stalks
Paul Nestor Djomou Djonga,
Jeanne Atchana,
Alexis Nankap,
Fabrice Kwefeu Mbakop,
Raphael Djackba,
Abel Tame
Issue:
Volume 8, Issue 1, March 2020
Pages:
6-14
Received:
16 April 2020
Accepted:
21 May 2020
Published:
4 June 2020
Abstract: The production of biogas as an energy source from organic waste is a viable option for waste recovery and reduction of greenhouse gases. Before any use of biogas, however, hydrogen sulfide and carbon must be removed to preserve consumer health and the life of the equipment. In this work, we were talking about purifying the biogas by washing on a column with an alkali solution produced from wood ash and ash from the wood stalk. To do this, a functional analysis of the purification system was made. After characterization of the samples, the alkalis were extracted, which were subsequently characterized. The next step was to carry out biogas purification tests from the alkali crystals. The extraction yield of alkali is 7% for the ash of meat grillers and 12% with the ash of banana stalk. The biogas was washed with an alkali concentration of 0.1 g/ml. The optimal residence time offering the best washing is 23 min for CO2 and 32 min for H2S. This study found that the alkali on the banana boom is better. During the washing test, a CO2 absorption capacity of 4.52g/ml of the alkali solution and 20.45 ppm / ml of H2S was recorded. By making an extrapolation It follows that for these quantities of CO2 and H2S absorbed per milliliter, during a domestic installation, for a volume of alkali of 1000 ml, we will have a volume of CO2 of 2,53m3 and a biogas volume of 6.33 m3.
Abstract: The production of biogas as an energy source from organic waste is a viable option for waste recovery and reduction of greenhouse gases. Before any use of biogas, however, hydrogen sulfide and carbon must be removed to preserve consumer health and the life of the equipment. In this work, we were talking about purifying the biogas by washing on a co...
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