Investigation of user behavior and assessment of typical operation mode for different types of firewood room heating appliances in Austria

Reichert, G.; Schmidl, Christoph; Haslinger, Walter; Schwabl, M.; Moser, W.; Aigenbauer, S.; Wöhler, Marius; Hochenauer, Christoph

doi:10.1016/j.renene.2016.01.092

Cited by 22 publications

(19 citation statements)

References 19 publications

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“…Research aiming to improve the efficiency of combustion systems and reduce emissions dust, CO, and NO x from low-power heating devices is part of legislative activities [48]. Kubica [31] and Reichert et al [49] have indicated the need to change the combustion technology in low-power heating devices. The top-down model of ignition is a much faster way to improve combustion, especially when using wood logs.…”

Section: Discussionmentioning

confidence: 99%

Impact of Ignition Technique on Pollutants Emission during the Combustion of Selected Solid Biofuels

2020

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Nowadays, heating using wood, briquettes, or pellets is a curious replacement to fossil fuels such as coal, oil, or gas. Unfortunately, the combustion of biofuels, especially in low-power boilers with unstable operating conditions, releases a lot of gas pollutants (e.g., carbon monoxide (CO), nitric oxide (NO), and various organic compounds) that are usually generated due to the incomplete product combustion. The combustion of biofuel in grate boilers with top-down ignition is a new approach, popular in society (mainly used for coal fuels), which improves the combustion process and reduces the amount of pollutants emitted. This study evaluated the impact of ignition techniques on the emission level of gas pollutants during the combustion of wood logs, briquettes, and pellets of pine in grate-based charging boilers. The combination of top ignition mode with pinewood logs allowed us to achieve a reduction of 6% in CO and sulfur dioxide (SO2) emission into the atmosphere. However, the combination of top-down ignition mode with pellets and briquettes produced, in fully operational conditions, 1- to 18-fold higher levels of CO and SO2 respectively, than bottom-up ignition, after an initial period of low level CO and SO2 emissions. During the tests (mainly with ignition from top), substantial emissions of NO were observed of up to 400 mg·m−3 at 10% O2. Therefore, further research is required to decrease emission related to the content of nitrogen in biomass. In this respect, research of impact on the combustion temperature of such emissions is needed.

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Section: Discussionmentioning

confidence: 99%

Impact of Ignition Technique on Pollutants Emission during the Combustion of Selected Solid Biofuels

2020

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“…B. Kontakt zum feuchten Waldboden), getrocknet werden. Hat der Wassergehalt einen relativ stabilen Wert erreicht (zwischen 15 und 20 %, nach 6–18 Monaten) 17, 18, orientiert sich dieser vor allem an den vorherrschenden Wetterbedingungen 19. Der Wassergehalt hat einen deutlichen Einfluss auf die Verbrennung.…”

Section: Einleitung Und Stand Des Wissensunclassified

Einfluss der Holzalterung auf die Brennstoffqualität und die Verbrennungschemie in einem Scheitholzofen

Endriss

Grammer

Russ

et al. 2021

Chemie Ingenieur Technik

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Die Studie zeigt den Einfluss der Zersetzungsprozesse bei Buchen‐ und Kiefernholz auf die Brennstoffqualität und Verbrennungschemie in einem Scheitholzofen. Insbesondere bei einer volumenbezogenen Betrachtung der aufgegebenen Holzmenge nehmen die Abbrandzeit und die Energieabgabe mit dem Zersetzungsgrad ab. Die gasförmigen Emissionen sowie die Staubemissionen ändern sich, in Abhängigkeit der Zersetzungsprozesse, nicht. Bei den hier durchgeführten Versuchen zeigten sich bei der Verbrennung von Nadelholz generell geringere gasförmige Emissionen als bei Laubholz.

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“…Emission rates and efficiencies of residential wood heating appliances are affected by a variety of end-user controlled fuel and operational parameters, including the physical and chemical properties of the wood, ignition method, adjustment of the combustion air damper, fuel amount per batch, heat setting and method and frequency of adding new fuel (Brandelet et al 2018;Fachinger et al 2017;Reichert et al 2017Reichert et al , 2016Shen et al 2013;Vicente et al 2015aVicente et al , 2015b. The usage patterns of OWHHs and IWSs are very different, due to the differences in their size, function and technical design.…”

Section: Introductionmentioning

confidence: 99%

“…European studies have used surveys and interviews to gain insight into end-user wood-burning appliance usage behaviors. (Oehler et al 2016;Reichert et al 2016;Schieder et al 2013;Wöhler et al 2016). While those studies provide useful information, they are not directly applicable to user behavior in the U.S and the results may have been influenced by the extensive interaction between users and researchers.…”

Section: Introductionmentioning

confidence: 99%

Investigation of real-life operating patterns of wood-burning appliances using stack temperature data

Ahmadi¹,

Minot

Allen³

et al. 2020

Journal of the Air & Waste Management Association

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A study was undertaken to identify patterns of consumer use of outdoor wood boilers or outdoor wood furnaces (technically referred to as outdoor wood-fired hydronic heaters (OWHHs)) and indoor wood stoves (IWSs) to inform the development of performance testing protocols that reflect real-life operating conditions. These devices are manually fed, and their usage protocols are a function of a number of variables, including user habits, household characteristics, and environmental factors. In this study, researchers logged the stack wall temperatures of 4 OWHH and 20 IWS units in the states of New York and Washington over two heating seasons. Stack wall temperature is an indicator of changes in combustion modes. Two algorithms were developed to identify usage modes and cold and warm start refueling events from the stack wall temperature time series. A linear correlation analysis was conducted to evaluate the effect of heat demand on usage patterns. The results and methods presented here will inform the cataloging of typical operational patterns of OWHHs and IWSs as a step in the development of performance testing procedures that represent actual in-home usage patterns.Implications: Current US regulatory programs for residential wood heating use a certification program to assess emissions and efficiency performance. Testing under this program uses a test that burns 100% of a single, standardized wood fuel charge to assess performance at different steady-state load conditions. This study assessed in-field operational patterns to determine if the current certification approach accurately characterized typical homeowner use patterns.

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Investigation of user behavior and assessment of typical operation mode for different types of firewood room heating appliances in Austria

Cited by 22 publications

References 19 publications

Impact of Ignition Technique on Pollutants Emission during the Combustion of Selected Solid Biofuels

Impact of Ignition Technique on Pollutants Emission during the Combustion of Selected Solid Biofuels

Einfluss der Holzalterung auf die Brennstoffqualität und die Verbrennungschemie in einem Scheitholzofen

Investigation of real-life operating patterns of wood-burning appliances using stack temperature data

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