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Sono stati analizzati gli inquinanti quali CO e NOx prodotti dal funzionamento della caldaia di potenza 140kW in diverse condizioni operative. Queste ultime sono state scelte per garantire funzionamento in air staging, e minimizzare NOx e CO. Con questo tipo di tecnologia, è possibile ridurre considerevolmente le emissioni dei sistemi di combustione a biomassa di piccola taglia. Infine, è stato progettato e realizzato un sistema di ricircolo dei gas di scarico del sistema, comprensivo di sistema di misura e acquisizione, per valutare l’impatto del suo utilizzo rispetto alla configurazione di base, in linea con la recente letteratura su questi dispositivi.

69 BIBLIOGRAFIA

[1] D.Lgs.28/2011, sulla promozione dell’uso dell’energia da fonti rinnovabili, recante modifica e successive abrogazione delle direttive 2001/77/CE e 2003/30/CE

[2] Patronelli Stefania <<Sistemi di generazione di energia da biomassa ligneo-

cellulosica: sviluppo di modelli predittivi>>, 2017

[3] EU_UltraLowDust_Final_Information_Material, Final Information Material and Policy Recommendations (D7.6), 2014

[4] H.Khodaei, F.Guzzomi, D.Patino, B.Rashidan, G.H.Yeoh,<< Air staging strategies in biomass combustion- gaseous and particulate emission reduction potentials>>, Elsevier, pp.29-41, 2016

[5] J.P.Carroll, J.M. Finnan, F.Biedermann, T.Brunner, I. Obernberger, <<Air staging to reduce emissions from energy crop combustion in small scale applications>>, Elsevier, pp.37-43, 2015

[6] H.Khodaei, F.Guzzomi, G.H.Yeoh, A. Regueiro, <<An experimental study into the effect of air staging distribution and position on emissions in a laboratory scale biomass combustor>>, Elsevier, pp.1243-1255, 2016

[7] H.Liu, J.Chaney, J.Li, C.Sun, <<Control of NOx emission of a domestic small-scale biomass pellet boiler by air staging>>, Elsevier, pp.792-798, 2012

[8] X.Wang, Z.Hu, S.Deng, Y.Xiong,H.Tan, <<Effect of biomass coal co-firing ad air staging on NOx emission and combustion efficiency in a drop tube furnace>>, Elsevier, pp.2331-2334, 2014

[9] F. Sher, M.A.Pans, D.T. Afilaka, C.Sun, H.Liu, <<Experimental investigation of woody and non woody biomass combustion in a bubbling fluidised bed combustor focusing on gaseous emissions and temperature profiles>>, Elsevier, pp.2069- 2080, 2017

70

[10] Y.Niu, X.Liu,S.Wang, S.Hiu, C.R. Shaddix, <<A numerical investigation of the effect of flue gas recirculation on the evolution of ultra-fine ash particles during pulverized coal char combustion>>, Elsevier, pp.1-10, 2017

[11] G.Zhang, W.Xu, X.Wang, Y.Yang, <<Analysis and optimization of a coal fired power plant under a proposed flue gas recirculation mode>>, Elsevier, pp.1-8, 2015 [12] I.Roiha, J.Kaikko, K.Jaanu, E. Vakkilainen,<< Analysis of high flue gas recirculation

for small energy conversion systems>>, Elsevier, pp.218-226, 2013

[13] Y.H.Li, G.B.Chen, Y.C.Lin, Y.C.Chao, <<Effects of flue gas recirculation on the premixed oxy methane flames in atmospheric condition>>, Elsevier, pp.1-13, 2015 [14] B.Shi, J.Hu, H.Peng, S.Ishizuka, <<Effects of internal flue gas recirculation rate on the nox emission in a methane air premixed flame>>, Elsevier, pp.199-211, 2017 [15] C.Aristeides, Tsiliyannis, <<Enhanced waste to energy operability under feedstock

uncertainty by synergistic flue gas recirculation and heat recuperation>>, Elsevier, pp.1320-1337, 2015

[16] Z.Mao, L. Zhang, X.Zhu, C.Zheng, <<Experiment investigation of coal mild oxy combustion integrated with flue gas recirculation at a 0.3 MWth furnace>>, Elsevier, pp.126-134, 2017

[17] Y.Tu, A.Zhou, M.Xu, W.Yang, K.B.Siah, S.Prabakaran, <<Experimental and numerical study of the combustion of 32 MW wood-chip grate boiler with internal flue gas recirculation technology>>, Elsevier, pp.591-598, 2017

[18] S.Gamrat, J.Poraj, J.Bodys, J.Smolka, W.Adamczyk, <<Influence of external flue gas recirculation on gas combustion in a coke oven heating system>>, Elsevier, pp.430-437, 2016

[19] G.Wang, Z.Wen, G.Lou, R.Dou, X.Li, X.Liu, F.Su, <<Mathematical modeling and combustion characteristic evaluation of a flue gas recirculation iron ore sintering process>>, Elsevier, pp.964-974, 2016

71

[20] G.Wang, Z.Wen, G.Lou, R.Dou, X.Li, X.Liu, F.Su, <<Mathematical modeling of and parametric studies on flue gas recirculation iron ore sintering>>, Elsevier, pp.648- 660, 2016

[21] J.H.Sung, S.K.Back, B.M.Jeong, J.H.Kim, H.S.Choi, H.N.Jang, Y.C.Seo, <<Oxy fuel co- combustion of sewage sludge and wood pellets with flue gas recirculation in a circulating fluidized bed>>, Elsevier, pp.79-85, 2017

[22] S.Y.Ahn, S.M.Go, K.Y.Lee, T.H.Kim, S.I.Seo, G.M.Choi, D.J.Kim, <<The characteristics of no production mechanism on flue gas recirculation in oxy-firing condition>>, Elsevier, pp.1163-1171, 2010

[23] MEMO/03/154 Bruxelles, 23 luglio 2003 Il protocollo di Kyoto

[24] K.Sartor, Y.Restivo, P.Ngendakumana, P.Dewallef, <<Prediction of SOX and NOX emissions from a medium size biomass boiler>>, Elsevier, pp.91-100, 2014

[25] Sandeep Kakran, Saurabh Chanana, <<Smart operations of smart grids integrated with distributed generation: A review>>, Elsevier, pp.524-535, 2018

[26] Rapporto IEA Total Primary Energy Supply, Avaiable:

https://www.iea.org/statistics/?country=WORLD&year=2016&category=Energy %20supply&indicator=TPESbySource&mode=chart&dataTable=BALANCES [consultato il 17-06-19]

[27] World energy outlook,IEA, scenarios, avaiable:https://www.iea.org/weo/ [consultato il 17-06-19]

[28] International Energy Outlook 2018 Executive Summary, luglio, 2018

[29] Dennis Coyne, <<World Oil 2018-2050: World Energy Annual Report>>, Department of Economics, University of Utah, 2018

[30] A.D.5142,Standard Test Methods for Proximate Analysis of the Analysis Sample of Coal and Coke by Instrumental Procedure

[31] A.D.5373,Standard Test Methods for instrumental determination of carbon, hydrogen, nitrogen, in laboratory samples of coal and coke,1977

[32] M. Buchmayr et al. <<A computationally inexpensive CFD approach for small-scale biomass burners equipped with enhanced air staging>>. In: Energy Conversion and Management, pp. 32 –42, 2016

[33] E. Houshfar, O. Skreiberg, D. Todorovic, A. Skreiberg, T. Lovas, A. Jovovic, L. Sorum, <<NOx emission reduction by staged combustion in grate combustion of biomass fuels and fuel mixtures>>, Elsevier, pp.29-40, 2012

72

[34] Luca galbiati, <<termotecnica potere calorifero dei combustibili>>, pp.243,

avaiable: http://www.manualihoepli.it/media/doc/pr243.pdf [consultato il 17- 06-19]

[35] Abdallah Elorf, Brahim Sarh, Excess air ratio effects on flow and combustion caracteristics of pulverized biomass (olive cake), Elsevier, pp.1-11, 2018

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