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Amara, Sofiane
Publications (10 of 10) Show all publications
Amara, S., Baghdadli, T., Knapp, S. & Nordell, B. (2017). Legionella Disinfection by Solar Concentrator System (ed.). Renewable & sustainable energy reviews, 70, 786-792
Open this publication in new window or tab >>Legionella Disinfection by Solar Concentrator System
2017 (English)In: Renewable & sustainable energy reviews, ISSN 1364-0321, E-ISSN 1879-0690, Vol. 70, p. 786-792Article in journal (Refereed) Published
Abstract [en]

The current study concerns the fundamental problems of Legionnaires disease. Four decades after Legionnaires' bacteria was first identified there is still a low level of clinical awareness. Humans are infected by inhalation of aerosolized water and/or soil contaminated with the bacteria. Several control methods are available for water disinfection: biocide, ultraviolet light sterilization, copper-silver ionization, ozonation etc. but only thermal treatment can completely eliminate Legionella, which is killed almost instantly at 70 °C. The current paper describes Legionella disinfection by a solar concentrator combined with a heat recovery system that reduces the heat demand. Though this study is made for a small system (160 l of hot water per day) the system can be enlarged (more hot water and more solar collector area) and the results are thus valid also for such larger systems. Here experiments of water treatment by a solar concentrator are summarized and analyzed where the temperature exceeds 80 °C at the outlet of the heat exchanger.

Place, publisher, year, edition, pages
Elsevier, 2017
National Category
Water Engineering
Research subject
Water Resources Engineering
Identifiers
urn:nbn:se:ltu:diva-9715 (URN)10.1016/j.rser.2016.11.259 (DOI)000396184900059 ()2-s2.0-85007574058 (Scopus ID)8621bd47-c8d6-44d2-b6f9-a543ba86d878 (Local ID)8621bd47-c8d6-44d2-b6f9-a543ba86d878 (Archive number)8621bd47-c8d6-44d2-b6f9-a543ba86d878 (OAI)
Note

Validerad; 2017; Nivå 2; 2017-03-08 (rokbeg)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-12-14Bibliographically approved
Amara, S., Nordell, B., Benyoucef, B. & Benmoussat, A. (2011). Concentration heating system with optical fiber supply (ed.). Paper presented at Impact of Integrated Clean Energy on the Future of the Mediterranean Environment : 14/04/2011 - 16/04/2011. Energy Procedia, 6, 805-814
Open this publication in new window or tab >>Concentration heating system with optical fiber supply
2011 (English)In: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 6, p. 805-814Article in journal (Refereed) Published
Abstract [en]

This paper reports on an experimental realization and field testing of a recently proposed solar fiber optic mini dish light concentrator connected to a hot water accumulator. The prototype dish is 150 cm in diameter. In repeated test the collected and concentrated sunlight was transported in a one millimeter diameter optical fiber to a selective surface in the storage tank. This surface absorbs the radiation which remains trapped inside as it heat exchanges with tank fluid which temperature can reach 70 °C.

National Category
Water Engineering
Research subject
Water Resources Engineering
Identifiers
urn:nbn:se:ltu:diva-32003 (URN)10.1016/j.egypro.2011.05.091 (DOI)000298294900091 ()2-s2.0-79960208773 (Scopus ID)659e98ad-c5c6-4651-9009-5892d55c6410 (Local ID)659e98ad-c5c6-4651-9009-5892d55c6410 (Archive number)659e98ad-c5c6-4651-9009-5892d55c6410 (OAI)
Conference
Impact of Integrated Clean Energy on the Future of the Mediterranean Environment : 14/04/2011 - 16/04/2011
Note
Validerad; 2011; 20110620 (ysko); Konferensartikel i tidskriftAvailable from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-07-10Bibliographically approved
Amara, S. (2011). Corrigendum to “Using Fouggara for Heating and Cooling Buildings in Sahara” (Energy Procedia 6 (2011), 55–64) (ed.). Energy Procedia, 6, 825
Open this publication in new window or tab >>Corrigendum to “Using Fouggara for Heating and Cooling Buildings in Sahara” (Energy Procedia 6 (2011), 55–64)
2011 (English)In: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 6, p. 825-Article in journal, Editorial material (Refereed) Published
National Category
Water Engineering
Research subject
Water Resources Engineering
Identifiers
urn:nbn:se:ltu:diva-6655 (URN)10.1016/j.egypro.2012.03.001 (DOI)4e8e0f9e-488b-4275-a3aa-f0023683894e (Local ID)4e8e0f9e-488b-4275-a3aa-f0023683894e (Archive number)4e8e0f9e-488b-4275-a3aa-f0023683894e (OAI)
Note

Godkänd; 2012; 20120320 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
Amara, S. (2011). Novel and ancient technologies for heating and cooling buildings (ed.). (Doctoral dissertation). Paper presented at . Luleå: Luleå tekniska universitet
Open this publication in new window or tab >>Novel and ancient technologies for heating and cooling buildings
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The basic issue of this thesis concerns one of the fundamental problems of the future of our society: How to meet the energy requirements for a large and growing world population while preserving our environment? This question is important for the world and the answers are complex and interwoven.Conventional energy sources, fossil and fissile, are polluting in the present and in the future: they erode the environment and their resources are limited. Renewable energy (hydro, wind, solar, geothermal) constitutes a minimum of pollution in the different energy systems. The technologies for using renewable energy are well known though further development and progress are made. This development also requires behavioural change, adaptation, and above all political will. The transition from an economy based on fossil energy to an economy based on renewable energy appears necessary for the protection of the environment. The cost of renewable energy is often represented as an obstacle but remains competitive in the long run.The development and availability of renewable energy, which varies because of its spatial and temporal distribution, require an adaptation of lifestyle, habits, habitat design (passive bioclimatic houses), urban planning and transportation.The focus of this thesis was to apply renewable energy in an area with hot summers and cold winter, a climate like that in the northwest of Algeria. In order to provide improved comfort in the buildings and also economic development in this area, the energy demand for heating and cooling was analyzed in the ancient city of Tlemcen. To supply domestic hot water and space heating, water must be simultaneously available at two different temperature levels. Cold water temperature, close to that of the atmosphere, and hot water between 50 and 60°C. An interesting feature of the preparation of hot water is the small variation of requirements during the year, unlike that to heating. The preparation of hot water is one of the preferred applications of solar energy in the building for several reasons. For this reason an experimental study of the thermal behaviour of a domestic hot water storage tank was undertaken. The phenomena that affect the thermal behaviour of tank especially the coupling between the solar collector and storage tank was studied. This study included concentrating solar collector in which optical fibers were used to transport the energy to the storage tank. Another technology was introduced and developed for the heating and cooling of buildings in the desert involving an existing ancient irrigation system called Fouggara. The novel idea is to use the Fouggara as an air conditioner by pumping ambient air through this underground system. Then air at a temperature of about 21°C would be supplied to the building for heating in the winter and cooling in the summer. This study shows the feasibility of using this ancient irrigation system of Fouggara and contributes to reducing and eliminating the energy demand for heating and cooling buildings in the Sahara desert.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2011. p. 120
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
Keywords
Heating/cooling, design, solar energy, simulation, optical fiber, light concentration, Fouggara, Earth sciences - Atmosphere and hydrosphere sciences, Geovetenskap - Atmosfärs- och hydrosfärsvetenskap
National Category
Water Engineering
Research subject
Water Resources Engineering
Identifiers
urn:nbn:se:ltu:diva-16977 (URN)0fade393-229c-4d21-987b-03c26cfb3f78 (Local ID)978-91-7439-316-3 (ISBN)0fade393-229c-4d21-987b-03c26cfb3f78 (Archive number)0fade393-229c-4d21-987b-03c26cfb3f78 (OAI)
Note

Godkänd; 2011; 20110920 (sofama)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
Amara, S., Nordell, B. & Benyoucef, B. (2011). Using fouggara for heating and cooling buildings in Sahara (ed.). Paper presented at Impact of Integrated Clean Energy on the Future of the Mediterranean Environment : 14/04/2011 - 16/04/2011. Energy Procedia, 6, 55-64
Open this publication in new window or tab >>Using fouggara for heating and cooling buildings in Sahara
2011 (English)In: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 6, p. 55-64Article in journal (Refereed) Published
Abstract [en]

In order to utilise naturally stored heat or cold from the ground, seasonal temperature variations are required. The reason is that the ground temperature is then warmer than the air temperature during winter and colder during summer. The heating and cooling demand in North Africa varies considerably with the greatest cooling demand in the East and the greatest heating demand in the West. In parts of Algeria the mean temperature difference between the coldest and warmest month is greater than 20 °C, which is favourable. In current work it was shown that the ancient Fouggara system, even today would be interesting for heating and cooling of buildings in the Sahara desert.

National Category
Water Engineering
Research subject
Water Resources Engineering
Identifiers
urn:nbn:se:ltu:diva-32665 (URN)10.1016/j.egypro.2011.05.007 (DOI)000298294900007 ()2-s2.0-79960235602 (Scopus ID)738f415b-b283-428c-bb08-4a8e3bfa5dd5 (Local ID)738f415b-b283-428c-bb08-4a8e3bfa5dd5 (Archive number)738f415b-b283-428c-bb08-4a8e3bfa5dd5 (OAI)
Conference
Impact of Integrated Clean Energy on the Future of the Mediterranean Environment : 14/04/2011 - 16/04/2011
Note

Validerad;2011;20110620 (ysko);Konferensartikel i tidskrift;Bibliografisk uppgift: Corrigendum in Energy Procedia, vol. 6, 2011, page 825

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-07-10Bibliographically approved
Amara, S., Benyoucef, B., Benhamou, M., Monougar, H. & Touzi, A. (2009). Experimental study of a domestic hot water storage tank thermal behaviour: Etude experimentale du comportement thermique d'une cuve de stockage d'eau chaude sanitaire (ed.). Paper presented at . Physical & Chemical News, 46(Mars), 15-20
Open this publication in new window or tab >>Experimental study of a domestic hot water storage tank thermal behaviour: Etude experimentale du comportement thermique d'une cuve de stockage d'eau chaude sanitaire
Show others...
2009 (English)In: Physical & Chemical News, ISSN 1114-3800, Vol. 46, no Mars, p. 15-20Article in journal (Refereed) Published
Abstract [en]

Many works were carried out on heat storage during the 20-30 last years, particularly on solar heat storage applications. Theoretical and experimental studies on internal behaviour storage were made and carried as well on laboratory installations as on a large scale. In order to understand the stratification phenomena, an experimental study of tank thermal behaviour of charge and discharge of domestic heat water storage is undertaken.

Identifiers
urn:nbn:se:ltu:diva-2484 (URN)01ae314b-d332-48ec-a3f0-bb86d4e6c841 (Local ID)01ae314b-d332-48ec-a3f0-bb86d4e6c841 (Archive number)01ae314b-d332-48ec-a3f0-bb86d4e6c841 (OAI)
Note
Upprättat; 2012; 20121030 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
Amara, S., Vigone, J. & Benyoussef, B. (2007). Etude d’un système de production et stockage d’eau chaude sanitaire pour le site de Tlemcen (ed.). Paper presented at . Revue Internationale d'Heliotechnique, 36B, 3-7
Open this publication in new window or tab >>Etude d’un système de production et stockage d’eau chaude sanitaire pour le site de Tlemcen
2007 (French)In: Revue Internationale d'Heliotechnique, Vol. 36B, p. 3-7Article in journal (Refereed) Published
Identifiers
urn:nbn:se:ltu:diva-6653 (URN)4e798098-fdb1-49c2-820a-893bc5c8309b (Local ID)4e798098-fdb1-49c2-820a-893bc5c8309b (Archive number)4e798098-fdb1-49c2-820a-893bc5c8309b (OAI)
Note
Upprättat; 2012; 20121031 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
Amara, S., Benmoussat, A., Benyoucef, B. & Nordell, B. (2007). Requirements energy estimate of heating & cooling for a dwelling in the site of Tlemcen (ed.). Paper presented at International Conference for Renewable Energies and Sustainable Developement : 21/05/2007 - 24/05/2007. (Special Ed.)
Open this publication in new window or tab >>Requirements energy estimate of heating & cooling for a dwelling in the site of Tlemcen
2007 (English)Article in journal (Refereed) Published
National Category
Water Engineering
Research subject
Water Resources Engineering
Identifiers
urn:nbn:se:ltu:diva-30351 (URN)420bf86d-2e0a-4cf2-ba7e-d0193b03c306 (Local ID)420bf86d-2e0a-4cf2-ba7e-d0193b03c306 (Archive number)420bf86d-2e0a-4cf2-ba7e-d0193b03c306 (OAI)
Conference
International Conference for Renewable Energies and Sustainable Developement : 21/05/2007 - 24/05/2007
Note
Godkänd; 2007; 20121031 (andbra); Konferensartikel i tidskriftAvailable from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
Amara, S., Zidani, C., Benaissa, D., Benyarou, F. & Benyoucef, B. (2006). Diurnal and nocturnal temperatures modelling of the site of Tlemcen (ed.). Paper presented at . Physical & Chemical News, 27, 59-64
Open this publication in new window or tab >>Diurnal and nocturnal temperatures modelling of the site of Tlemcen
Show others...
2006 (English)In: Physical & Chemical News, ISSN 1114-3800, Vol. 27, p. 59-64Article in journal (Refereed) Published
Abstract [en]

The hourly and monthly middle temperature knowledge is necessary for an adequate dimensionnement of the thermal photo generators, of the agricultural greenhouses and for the air-conditioning of the site. Our work consists in a modelling of these temperatures on the site of TLEMCEN. The treatment of the gradual measure results on several years permitted us the diurnal and nocturnal middle temperature modelling and their variations during the day of the year. This study permits us an optimization of energy captured and the reduction of losses for the storage of energy. This study is necessary for a dimensionnement adapted to cost reduces the generator. The technique of the fittage used permitted us the modelling of these temperatures and the dimensionnement of a generator photo thermal.

Identifiers
urn:nbn:se:ltu:diva-7786 (URN)6359d2b8-8cdc-463f-bb8d-f0ade696c093 (Local ID)6359d2b8-8cdc-463f-bb8d-f0ade696c093 (Archive number)6359d2b8-8cdc-463f-bb8d-f0ade696c093 (OAI)
Note
Upprättat; 2012; 20121101 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
Amara, S., .Virgone, J., Bouia, H. & Krauss, g. (2005). Stratification dans les ballons d'eau chaude sanitaire: comparasion de modèles existants (ed.). Paper presented at Journées Internationales de Thermique : 15/11/2005 - 17/11/2005. Paper presented at Journées Internationales de Thermique : 15/11/2005 - 17/11/2005.
Open this publication in new window or tab >>Stratification dans les ballons d'eau chaude sanitaire: comparasion de modèles existants
2005 (French)Conference paper, Oral presentation only (Refereed)
Identifiers
urn:nbn:se:ltu:diva-34334 (URN)88219228-19fe-4b2b-92c2-3719daaef3d5 (Local ID)88219228-19fe-4b2b-92c2-3719daaef3d5 (Archive number)88219228-19fe-4b2b-92c2-3719daaef3d5 (OAI)
Conference
Journées Internationales de Thermique : 15/11/2005 - 17/11/2005
Note
Upprättat; 2005; 20121108 (andbra)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
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