Abstract
With sustainable energy being the key to reaching climate neutrality, the utilization of non-wooden biomass is a necessity. This article compares the emissions and efficiency of combusting a number of types of agrobiomass and wood pellets. A comparison was made on a moving grate pellet burner mounted in a boiler, where flue gas had a vertical flow via two pass heat exchangers with turbulization elements. Tests were conducted on wood pellets (ENPlus), miscanthus straw pellets, sunflower husk pellets, and corn stover pellets. During combustion, both wood and miscanthus pellets met the PN-EN 303-5:2012 emission and efficiency requirements. Corn stover pellets met the requirement on the nominal capacity. Sunflower husk pellets are characterized by excessive CO and particulate matter emissions. Sunflower husk pellets were the most problematic fuel from the point of view of the results of this research. During combustion of the miscanthus straw pellets there was a need to decrease the nominal heating capacity due to ash sintering.
Highlights
The utilization of sustainable energy is a key element of the contemporary world and the EU, with the European Green Deal, has made a decisive step towards its 3 × 20 targets
The subject of this research was a 20 kW heating capacity solid fuel boiler equipped with a suitable pellet burner
For laboratory testing, four types of pellets were used: wood pellet class A1 and agrobiomass pellets made from sunflower husks, mis
Summary
The utilization of sustainable energy is a key element of the contemporary world and the EU, with the European Green Deal, has made a decisive step towards its 3 × 20 targets. One crucial biomass technology is pellet incineration in domestic pellet boilers. This is the most effective and cleanest biomass utilization for heating in households. Pellet boilers in the Polish heating market are increasingly popular, especially since low-stack emissions were revealed to be one of the main sources of air pollution in Poland [2]. In 2018, Poland launched its “Clean Air” program, the main goals of which are improving the energy efficiency of buildings and reducing the emission of dust and other pollutants into the atmosphere, mainly from the heating systems of single-family houses where old and low quality solid fuel boilers burning low-quality fuel are used [3,4]. Poland has 47% of the European market share of solid fuel boilers (mainly coal-fired boilers) [7]
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