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16 results on '"Rahmouni Camal"'

4. Co-combustion of Pulverised Coal/Biomass for Steam Production: eMergy Approach

Author

Rahmouni, Camal, Le Corre, Olivier, Chercheur indépendant, Laboratoire de génie des procédés - environnement - agroalimentaire (GEPEA), Mines Nantes (Mines Nantes)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS)-Centre National de la Recherche Scientifique (CNRS), and Mines Nantes (Mines Nantes)

Subjects
co-combustion, [SPI.OTHER]Engineering Sciences [physics]/Other, Emergy, solid fuels
Abstract

International audience; Emergy, also called Embodied energy, has been firstly defined by Odum. It is the energy required to make a service or product expressed in energy of one form (here solar energy). Emergy per mass or transformity (expressed as solar energy joule per gram [sej/g]) varies from 0.88 109 sej/g for wood to a high of 1.1 1015 sej/g for coal. This concept of eMergy is particularly relevant to compare on the same basis different fuels especially to analyse co-combustion of renewable and non-renewable combustibles. The cost of co-combustion, in term of emergy, makes it relevant if collection of biomass remains below the threshold distance of 400 km from the power plant. That threshold can be raised to 700 km when the calorific value of biomass feed stock is higher.

Published
2008

5. Stationary gas engine protecting device for stationary power generating facility of vehicle, has determining unit determining power value, and changing unit changing set power value such that supplied power is equal to pre-determined value

Author

Le Corre, Olivier, Truffet, Laurent, Rahmouni, Camal, Laboratoire de génie des procédés - environnement - agroalimentaire (GEPEA), Mines Nantes (Mines Nantes)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS)-Centre National de la Recherche Scientifique (CNRS), Mines Nantes (Mines Nantes), and Chercheur indépendant

Subjects
[SPI.OTHER]Engineering Sciences [physics]/Other
Abstract

The device (24) has a measuring unit i.e. sensor (26), measuring a quantity i.e. methane index (IM), representing combustion behavior of gas supplied to a stationary gas engine (12). A determining unit (28) determines an optimum electrical power value (Peopt) to be achieved based on the measured quantity representing the combustion behavior of the measured combustion gas. A changing unit (30) changes a set power value (Pc) such that supplied electrical power (Pe) is equal to the pre-determined optimum electrical power value. Independent claims are also included for the following: (1) a method of protecting a stationary gas engine (2) a method of generating a digital drift cartography.

Published
2008

6. Dispositif de protection pour un moteur à gaz

Author

Le Corre, Olivier, Truffet, Laurent, Rahmouni, Camal, Laboratoire de génie des procédés - environnement - agroalimentaire (GEPEA), Mines Nantes (Mines Nantes)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS)-Centre National de la Recherche Scientifique (CNRS), Mines Nantes (Mines Nantes), and Chercheur indépendant

Subjects
[SPI.OTHER]Engineering Sciences [physics]/Other
Published
2008

7. METHOD FOR PROTECTING A GAS ENGINE AND ASSOCIATED DEVICE

Author

Le Corre, Olivier, Rahmouni, Camal, Rousseau, Stéphane, Truffet, Laurent, Laboratoire de génie des procédés - environnement - agroalimentaire (GEPEA), Mines Nantes (Mines Nantes)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS)-Centre National de la Recherche Scientifique (CNRS), Mines Nantes (Mines Nantes), and Chercheur indépendant

Subjects
[SPI.OTHER]Engineering Sciences [physics]/Other
Abstract

The invention relates to a device for protecting (24) a gas engine (12), especially a stationary gas engine, for regulating at least one parameter (Pj) of the engine (12), said device comprising means (26) for obtaining an index (IMi; IMg) which represents the combustion behaviour of a gas to be potentially supplied to the engine (12). The invention is characterised in that the device also comprises means (28) for determining an optimum regulating value of the parameter in view of the index obtained (IMi; IMg).

Published
2008

8. DEVICE FOR PROTECTING A GAS ENGINE

Author

Le Corre, Olivier, Truffet, Laurent, Rahmouni, Camal, and Le Corre, Olivier

Subjects
[SPI.OTHER] Engineering Sciences [physics]/Other
Published
2007

9. METHOD FOR DEFINING AT LEAST ONE POWER PROPERTY OF GAS FUEL MIXTURE BY MEASURING PHYSICAL PROPERTIES OF A GAS MIXTURE

Author

Rahmouni, Camal, Tazerout, Mohand, Le Corre, Olivier, Chercheur indépendant, Laboratoire de génie des procédés - environnement - agroalimentaire (GEPEA), Mines Nantes (Mines Nantes)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS)-Centre National de la Recherche Scientifique (CNRS), Mines Nantes (Mines Nantes), and Le Corre, Olivier

Subjects
[SPI.OTHER]Engineering Sciences [physics]/Other, [SPI.OTHER] Engineering Sciences [physics]/Other
Published
2004

10. Method for determining at least one energetic property of a gas fuel mixture by measuring physical properties of the gas mixture

Author

Rahmouni, Camal, Tazerout, Mohand, Le Corre, Olivier, Chercheur indépendant, Mines Nantes (Mines Nantes), Laboratoire de génie des procédés - environnement - agroalimentaire (GEPEA), Mines Nantes (Mines Nantes)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS)-Centre National de la Recherche Scientifique (CNRS), and Le Corre, Olivier

Subjects
[SPI.OTHER]Engineering Sciences [physics]/Other, [SPI.OTHER] Engineering Sciences [physics]/Other, Astrophysics::Galaxy Astrophysics
Abstract

The present invention relates to a method of determining at least one energy property of a gaseous mixture which consists in: 1. measuring, on said gaseous mixture, n physical properties phii at a temperature T and/or one physical property phii at n different temperatures; 2. determining, from said physical properties, the composition of a gas with n+1 components that is equivalent to said mixture; and 3. deducing the energy properties of said gaseous mixture from said composition of the equivalent gas.

Published
2003

15. Formulation and combustion of emulsified fuel: The changes in emission of carbonaceous residue.

Author

Tarlet, Dominique, Bellettre, Jérôme, Tazerout, Mohand, and Rahmouni, Camal

Subjects
FLAMMABLE liquids, EMULSIONS, VAPOR pressure, SEPARATION (Technology), FUEL
Abstract

Burning dense, viscous combustibles such as heavy fuel-oil as a water-in-oil emulsified combustible enables to decrease the emission of solid carbonaceous residue, in comparison with raw, non-emulsified combustible. This is due to the phenomenon of micro-explosion, meaning the rapid (<0.1 ms) vaporization of the water droplets inside the emulsion, breaking up the initial emulsion droplet into numerous and faster ‘daughter-droplets’. The present work is based on a small-scale furnace (300 kW max.) feed with heavy fuel-oil mixed with 10–20% of gasoil, with and without emulsion of water. The emulsification of combustible enables to record a reproducible lowering in emission of carbonaceous residue from the combustion of emulsified fuel, in comparison with raw fuel. This is added to a variation in granulometry of carbonaceous residue, hereby considered as an indicator of second atomization. Copyright © 2009 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]

Published
2010
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16. Determination of the combustion properties of natural gases by pseudo-constituents&star;

Author

Rahmouni, Camal, Tazerout, Mohand, and Corre, Olivier Le

Subjects
*NATURAL gas, *COMBUSTION
Abstract

This paper presents a methodology for a rapid determination of important natural gas combustion properties (lower heating value, Wobbe index and the stoichiometric air–fuel ratio) using easily detectable physical properties. It is possible to determine natural gas composition by measuring two physical properties and using specific ternary diagrams (CH4–C2H6–C3H8 and CH4–C2H6–N2). The first part of the work deals with the selection of two physical properties from a group comprising thermal conductivity, refraction index, and speed of sound. Then, in the second part, a sensor using the best couple of physical property is used to determine the ternary pseudo-constituents of the gas mixture. The model and the sensor are applied to specific situations such as the online determination of LHV. The error on the combustion properties of natural gas is less than 1% over the gases considered in the present study and over about 20 typical gases supplied over Europe. The effect of small errors in the measurement of physical properties has also been highlighted. [Copyright &y& Elsevier]

Published
2003
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