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Energies 2013, 6(11), 5760-5774; doi:10.3390/en6115760
Article

Corn Stover and Wheat Straw Combustion in a 176-kW Boiler Adapted for Round Bales

* ,
 and
Agriculture and Agri-Food Canada, Soils and Crops Research and Development Centre, 2560 Hochelaga Blvd., Quebec City, QC G1V 2J3, Canada
* Author to whom correspondence should be addressed.
Received: 7 September 2013 / Revised: 19 October 2013 / Accepted: 23 October 2013 / Published: 4 November 2013
(This article belongs to the Special Issue Biomass and Biofuels 2013)
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Abstract

Combustion trials were conducted with corn stover (CS) and wheat straw (WS) round bales in a 176-kW boiler (model Farm 2000). Hot water (80 °C) stored in a 30,000-L water tank was transferred to a turkey barn through a plate exchanger. Gross calorific value measured in the laboratory was 17.0 and 18.9 MJ/kg DM (dry matter) for CS and WS, respectively. Twelve bales of CS (1974 kg DM total, moisture content of 13.6%) were burned over a 52-h period and produced 9.2% ash. Average emissions of CO, NOx and SO2 were 2725, 9.8 and 2.1 mg/m3, respectively. Thermal efficiency was 40.8%. For WS, six bales (940 kg DM total, MC of 15%) were burned over a 28-h period and produced 2.6% ash. Average emissions of CO, NOx and SO2 were 2210, 40.4 and 3.7 mg/m3, respectively. Thermal efficiency was 68.0%. A validation combustion trial performed a year later with 90 CS bales confirmed good heating performance and the potential to lower ash content (6.2% average).
Keywords: corn stover; wheat straw; round bale; combustion; flue gas emission; calorific value; ash content; energy balance corn stover; wheat straw; round bale; combustion; flue gas emission; calorific value; ash content; energy balance
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Morissette, R.; Savoie, P.; Villeneuve, J. Corn Stover and Wheat Straw Combustion in a 176-kW Boiler Adapted for Round Bales. Energies 2013, 6, 5760-5774.

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