Reduction of fine particle emissions from wood combustion with optimized condensing heat exchangers

A. Gröhn, V. Suonmaa, Ari Auvinen, K.E.J. Lehtinen, Jorma Jokiniemi (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

In this study, we designed and built a condensing heat exchanger capable of simultaneous fine particle emission reduction and waste heat recovery. The deposition mechanisms inside the heat exchanger prototype were maximized using a computer model which was later compared to actual measurements. The main deposition mechanisms were diffusio- and thermophoresis which have previously been examined in similar conditions only separately. The obtained removal efficiency in the experiments was measured in the total number concentration and ranged between 26 and 40% for the given pellet stove and the heat exchanger. Size distributions and number concentrations were measured with a TSI Fast mobility particle sizer (FMPS). The computer model predicts that there exists a specific upper limit for thermo- and diffusiophoretic deposition for each temperature and water vapor concentration in the flue gas.
Original languageEnglish
Pages (from-to)6269-6274
Number of pages6
JournalEnvironmental Science & Technology
Volume43
Issue number16
DOIs
Publication statusPublished - 2009
MoE publication typeA1 Journal article-refereed

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combustion
water vapor
particle
experiment
temperature
flue gas
emission reduction
removal
waste heat
stove

Cite this

Gröhn, A. ; Suonmaa, V. ; Auvinen, Ari ; Lehtinen, K.E.J. ; Jokiniemi, Jorma. / Reduction of fine particle emissions from wood combustion with optimized condensing heat exchangers. In: Environmental Science & Technology. 2009 ; Vol. 43, No. 16. pp. 6269-6274.
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Reduction of fine particle emissions from wood combustion with optimized condensing heat exchangers. / Gröhn, A.; Suonmaa, V.; Auvinen, Ari; Lehtinen, K.E.J.; Jokiniemi, Jorma (Corresponding Author).

In: Environmental Science & Technology, Vol. 43, No. 16, 2009, p. 6269-6274.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Jokiniemi, Jorma

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AB - In this study, we designed and built a condensing heat exchanger capable of simultaneous fine particle emission reduction and waste heat recovery. The deposition mechanisms inside the heat exchanger prototype were maximized using a computer model which was later compared to actual measurements. The main deposition mechanisms were diffusio- and thermophoresis which have previously been examined in similar conditions only separately. The obtained removal efficiency in the experiments was measured in the total number concentration and ranged between 26 and 40% for the given pellet stove and the heat exchanger. Size distributions and number concentrations were measured with a TSI Fast mobility particle sizer (FMPS). The computer model predicts that there exists a specific upper limit for thermo- and diffusiophoretic deposition for each temperature and water vapor concentration in the flue gas.

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