Slim, Rayan (2007) Modelling and design of a drying system by solar greenhouse associated with heat pumps for sewage sludge. PhD thesis Energétique, CEP - Centre Energétique et Procédés p.132.
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Abstract
Wastewater sludge management raises a serious challenge due to ever increasing environmental pollution and energy consumption. The aim of this work is to study the drying of wastewater sludge using solar energy combined with heat pumps and to investigate possible ways of providing supplemental energy to sludge drying when needed.
A laboratory-scale drying test bench was set up to study the conductive drying of sludge and evaluate its drying characteristics. An analytical method was developed to evaluate water vapor diffusivity within urban sludge, modelled as coarse aggregated porous medium where only aggregates external porosity is accounted for. This method, which is based on the analytical solution of a fickian diffusive model, allows the evaluation of the impedance to which vapor diffusion is subjected throughout drying, as a function of the sludge dry solid content. Experiments highlighted the effect of mixing frequency on drying enhancement.
Convective heat and mass transfers, occurring between air and sludge, were experimentally characterized. Experiments have shown the effect of increased surface air velocities on the enhancement of the drying mechanism. A correlation giving the deviation from the Lewis’ predicted mass transfer coefficients was established as a function of the sludge dry solid content. The concept of blowing air by means of linear slits along the greenhouse width was proposed as a way of improving air distribution inside the greenhouse.
A mathematical model has been developed to simulate this new drying system and evaluate its performances and energy consumptions. Weather data were incorporated in order to evaluate system seasonal performances. The system analysis focused on the influence of climatic conditions on heat pumps operating conditions and allowed the definition of an optimal regulation based on the minimisation of the marginal energy consumption. Furthermore, simulations showed improvement on the combined drying system performances with reduced sludge thickness
| Item Type: | PhD Thesis (PhD) |
|---|---|
| Thesis Supervisor: | Clodic, Denis |
| Date: | 25 October 2007 |
| Board of examiners: | Neveu, P. and Crine, M. and Clodic, D. and El Khoury, K. and Gresles, A. and Merlin, E. |
| Ecole Doctorale: | ED 432 ECOLE DOCTORALE SCIENCES DES METIERS DE L'INGENIEUR |
| Discipline: | Energétique |
| Collection (Fonds): | ENSMP |
| Department: | CEP - Centre Energétique et Procédés |
| Subjects: | 5. Fluid Mechanics and Energy |
| Uncontrolled Keywords: | Sewage treatment plant, Sludges, Solar drying, Heat pump, Heat transfer, Séchage, Boues de station d'épuration, Serre solaire, Pompe à chaleur, Conductif, Consommation énergétique, Transfert de masse |
References
[ADE00] Agence de l'Environnement et de la Maîtrise de l'Energie.
"Procédés de séchage dans l’industrie". Juin 2000
[ARL05] ARLABOSSE P., CHAVEZ S, PREVOT C.
"Drying of municipal sewage sludge : from a laboratory scale dryer to the paddle
dryer". Brazilian journal of chemical engineering, vol. 22, n°2, pp 227-232, April -
June 2005.
[DEG05] DEGRÉMONT
"Mémento technique de l'eau Suez environnement", Lavoisier mai 2005.
[E&T04] ENVIRONNEMENT Et TECHNIQUE
"Le séchage des boues, une filière qui préserve les options". Juin 2004.
[EFE03] ENVIRO-CONSULT
EFE conférence du 19/11/2003.
[IFE02] IFEN
"L'épuration des eaux usées urbaines: Les évolutions récentes de
l'assainissement". Les données de l'environnement , N°76, p4, 2002.
[LEO03] LÉONARD A.
"Etude du séchage convectif des boues de station d'épuration. Suivi de texture
par microtomographie à rayons X", Thèse de doctorat de l'université de Liège,
2003.
[NUM97] NUMRICH R., BROWNE B.W.
"Sludge drying with mechanical vapor recompression". UTA international,
vol.2,pp.126-130,1997.
[NAD95] NADEAU J.P., PUIGGALI J.R.
"Séchage : des processus physiques aux procédés industriels".Edition Lavoisier
1995.
[OTV97] OUVRAGE COLLECTIF N°2
"Traiter et valoriser les boues". Infinités Communication 1997.
[RCE99] RAPPORT COMMISSION EUROPÉENNE.
"Mise en oeuvre de la directive européenne 91/271/CEE du Conseil du 21 mai
1991 relative au traitement des eaux urbaines résiduaires", modifiée par la
directive 98/15/CE de la Commission du 27 février 1998”., 1999.
[SAU04] SAUR
Direction développement scientifique et technique. Recherche et
développement. Dossier de demande d'aide à l'ADEME. Mai 2004.
[BAU04] BAUDEZ J.C., AYOL A., COUSSOT P.
Références bibliographiques 128
“Practical determination of the rheological behavior of pasty biosolids”.Journal
of environmental management, vol.72, pp 121- 188, 2004.
[DEG05] DEGREMONT, SUEZ.
Mémento technique de l’eau. 10th edition, vol. 1, pp 165-183, vol.2, pp 1290-
1305.Lavoisier, 2005.
[HYL83] HYLAND, R.W. AND WEXLER, A.
Formulations for the thermodynamic properties of the saturated phases of H2O
from 173.15K to 473.15K. ASHRAE Transactions., vol.89(2A), pp.500-
519,1983.
[JON03] JONES B.J., OR D., BINGHAM G.E.
“Gas diffusion measurement and modeling in coarse-textured porous media”.
Vadoze Zone Journal, vol. 2, pp 602-610, 2003.
[KOH02] KÖHNE J.M., GERKE H.H., KÖHNE S.
“Effective diffusion coefficients of soil aggregates with surface skins”. Soil
Science Society of America Journal, vol. 66, pp 1430-1438, 2002.
[MIL71] MILLINGTON R.J. AND SHEARER R.C.
“Diffusion in aggregated porous media”. Journal of Soil Science, vol. 111,No.6,
pp 372-378, 1971.
[MOL97] MOLDRUP, P., T. OLESEN, D.E. ROLSTON, AND T. YAMAGUCHI.
“Modeling diffusion and reaction in soils. Predicting gas and ion diffusivity in
undisturbed and sieved soils”. Journal of soil Science, vol. 162, pp 632–640,
1997.
[MOL00a] MOLDRUP P., OLESEN T., GAMST J., YAGAMUSHI T., SCHJONNING P.,
ROLSTON D.E.
“Predicting the gas diffusion in repacked soil: water induced linear reduction
model”. Soil Science Society of America Journal, vol. 64, pp 1588-1594,
2000(a).
[MOL00b] MOLDRUP P., OLESEN T., YAGAMUSHI T., SCHJONNING P., ROLSTON
D.E.
“Predicting the gas diffusion in undisturbed soil from soil water characteristics”.
Soil Science Society of America Journal, vol. 64, pp 94-100, 2000(b).
[MOL04] MOLDRUP P., OLESEN T., YOSHIKAWA S., KOMATSU T., ROLSTON D.E.
“Three porosity model for predicting the gas diffusion coefficient in undisturbed
soil”. Soil Science Society of America Journal, vol. 68, pp 750-759, 2004.
[MUJ95] MUJUMDAR A.
Handbook of industrial drying, second edition, revised and expanded, edited
by Arun Mujumdar, 1995.
[NAD95] NADEAU J.P., PUIGGALI J.R.
Séchage: Des processus physiques aux processus industriels. Edition
Lavoisier 1995
[PRU85] PRUESS, K. AND T.N. NARASIMHAN.
“A Practical Method for Modeling Fluid and Heat Flow in Fractured Porous
Media”. Society of Petroleum Engineers Journal, vol. 25 part 1, pp14-26,
February 1985.
[TUL01] TULI A.
“Pore geometry effect on gaseous diffusion and convective fluid flow in soil”.
Dissertation for the degree Doctor in philosophy in soil science. University of
California Davis, 2001.
[AKP06] AKPINAR E.K., BICER Y., CETIN K.F.
“Modelling of thin layer drying of parsley leaves in a convective dryer and
under open sun”, Journal of food engineering , vol. 75, pp. 308-315, 2006
[BER61] BERMAN L.D.
"Evaporative cooling of circulating water ", Pergamon press,1961.
[HUK99] HUKKA A., OKSANEN O.
“Convective mass transfer coefficient at wooden surface in jet drying of
Veneer”, Holzforschung, vol.53, pp. 204-208, 1999
[JAI06] JAIN D.
“Determination of Convective Heat and Mass Transfer Coefficients for Solar
Drying of Fish”, Biosystems Engineering, vol. 94 , part 3, pp., 429–435, 2006.
[KAR05] KARIM M.A., HAWLADER M.N.A.
“Drying characteristics of banana, Theoretical modelling and experimental
validation”, Journal of food engineering, vol. 70, pp. 35-45, 2005
[KOO07] KOOLI S;, FADHEL A., FARHAT A., BELGITH A.
“Drying of red pepper in open sun and greenhouse conditions . Mathematical
modelling and experimental validation”, Journal of food engineering, vol. 79,
pp. 1094-1103, 2007.
[LEO03] LEONARD A.,
"Etude du séchage convectif des boues de station d’épuration. Suivi de texture
par microtomographie à rayons X", Thèse de doctorat de l’université de Liège,
2003.
[MAB06] MABROUK S.B, KHIARI B., SASSI M.
“ Modelling of heat and mass transfer in a tunnel dryer”, Applied thermal
engineering, vol. 26, pp. 2110-2118, 2006
[MUJ95] MUJUMDAR A.S.
Handbook of industrial drying. Second edition, revised and expanded. Marcel
Dekker Inc. New York,1995
[PER02] PERRÉ P., MAY B.K.
"The importance of considering surface area reduction to exhibit a constant
drying flux period in foodstuff drying, Journal of food engineering, vol.54, pp.
271-282, 2002.
[RAH06] RAHMAN N., KUMAR S.
“Evaluation of convective heat transfer coefficient during drying of shrinking
bodies”, Energy Conversion and Management, vol. 47, pp. 2591–2601, 2006.
[RIA05] RIACHI Y.
" Etude et simulation d’un système de climatisation pour bus de transport en
commun , conception et réalisation d’un démonstrateur", Thèse de doctorat
Energétique, Ecole des Mines de Paris, 2005.
[SAC93] SACADURA J.F.
"Initiation aux transferts thermiques", Technique et documentation Lavoisier,
1993
[SCH00] SCHUYLER G.
Rules of thumb for providing uniform airflow, designing air distribution devices,
RWDI consulting engineers& scientists, 2000.
[SJO95]. SJÖHOLM I., GEKAS V.
“Apple Shrinkage upon Drying”, Journal of food engineering, vol.25, pp. 123-
130, 1995
[SUN05] SUN L.
“A diffusion model for drying of sensitive solid under multiple heat input
modes”, Bioresource Technology, vol.96, pp. 1551-1560, 2005.
[BER02] BERNTSSON T.
“Heat sources, technology, economy and environment”. International journal of
refrigeration, vol. 25, pp 428-438, 2002.
[CLE89] CLELAND D.J., CLELAND A.C.
“Appropriate level of model complexity in dynamic simulation of refrigeration
systems”. Refrigeration Science and Technology, Vol.1, pp 261-268, 1989. [5]
[DAR91] DARROW J.B., LOVATT S.J. AND CLELAND A.C.
“Assessment of a simple mathematical model for predicting the transient
behavior of a refrigeration system”. XVIIIth International Congress of
Refrigeration. Montréal, p. 1189-1192,1991.
[DEW85] DEWITT D.P., INCROPERA F.P.
Fundamentals of heat and mass transfer. Wiley,.1985.
[DOM02] DOMANSKI L.
“A parameter estimation based model of Water-to-Water heat pumps for use in
energy calculation programs”. ASHRAE transactions, vol. 108, part 1, pp 3-17,
2002.
[FIS85] FISCHER, S.K. AND RICE C.K.
“System design optimization and validation for single-speed heat pump”.
ASHRAE Transaction, vol 91, part 2,1985
[HOR05] HORN S., BARR K., MCLELLAN J., BUX M.
“Accelerated air drying of sewage sludge using a climate controlled solar
drying hall”. http://www.thermo-system.com
[HOU05] HOUILLON G., JOLLIET O.
“Life cycle assessment of processes for the treatment of wastewater urban
sludge: energy and global warming analysis”. Journal of cleaner production,
13: 287-299, 2005.
[HYL83] HYLAND, R.W. AND WEXLER, A.
Formulations for the thermodynamic properties of the saturated phases of H2O
from 173.15K to 473.15K. ASHRAE Trans., vol.89(2A), pp.500-519,1983
[JIN02] JIN, H. AND J.D. SPITLER.
“A parameter estimation based model of water-to-water heat pumps for use in
energy calculation programs”. ASHRAE Transactions. Vol.108, part 1, pp:3-
17, 2002.
[KIM04] KIM M., KIM M.S., CHUNG J.D.
“Transient thermal behavior of a water heater system driven by a heat pump”.
International journal of refrigeration, vol.27, pp 415-421, 2004
[LIN05] LINDHOLM, HOFLUND, R.; ZHOU, Y.
“Design and optimum control of a Swedish dual-source (air and ground) heat
pump system”. 8th IEA Heat Pump Conference, CD pp. 1-13. Las Vegas,
USA: IEA, 2005.
[SLI07] SLIM R., ZOUGHAIB A., CLODIC D.
“Characterization of sewage sludge water vapor diffusivity in low temperature
conductive drying”. Journal of Porous Media. Article in Press, 2007.
[STE92] STEFANUK N.B.M., APLEWICH J.D. RENKSIZBULUT M.
Modelling and simulation of a superheat-controlled water-to-water heat pump.
ASHRAE Transactions, Vol. 98, Part 2, p.172-184, 1992 .
| ID Code: | 3485 |
|---|---|
| Deposited By: | Claudine Abauzit |
| Deposited On: | 29 February 2008 |
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