Analysis of the effect of the chemical composition of low calorific gaseous fuels on workload concentration in an engine’s combustion chamber

Low calorific gaseous fuels are becoming increasingly used as alternative fuels for feeding power equipment of all kinds, including combustion engines. The increased interest in these fuels results, above all, from support for the development of this type of power engineering by governmental and international institutions, aiming to increase the renewable energy share in the overall energy balance. Fuels of this type are obtained by processing different kinds of biomass and natural raw materials and can also be recovered from natural processes occurring in nature. Due to the diverse technologies for obtaining these fuels, their chemical composition is variable, which significantly affects the efficiency of their use as fuels for combustion engines. When engines are fed with gaseous fuels, combustion chamber filling conditions change considerably due to the much higher gaseous fuel volume compared to liquid fuels, which significantly affects the engine’s performance. This paper presents the effect of individual combustible components contained in different low calorific gaseous fuels on changes in the degree of engine combustion chamber air filling and on the calorific value of the produced combustible air-gaseous fuel mixture.