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The impact of the share of biogas in a supply dose on load parameters in the combustion chamber of a dual-fuel compression-ignition engine

Wierzbicki S., Boruta G., Piętak A.

Journal of KONES

2016

Vol. 23, No. 2

407--414

The need to increase the share of renewable fuels in the general energy balance necessitates the search for new possibilities of their use. One such fuel is biogas, which is generated both as a result of natural processes occurring, e.g. in landfills, and can also be obtained from various biological materials in biogas plants. Because of its properties, biogas may be used to power spark-ignition engines. At the same time, in numerous scientific centres attempts are underway at using biogas to power compression-ignition engines. Due to the relatively high autoignition temperature of methane, which is the main component of biogas, it is necessary to use dual-fuel supply systems in CI engines. Providing fuel gas to such an engine in the form of biogas, which can have a varying chemical composition, considerably changes the conditions of combustion in the engine compartment, which affects both the performance of the engine as well as the emission of toxic compounds into the atmosphere. The present paper discusses the impact of supplying an engine with fuel gas, as well as of the composition of biogas, on the ratios describing the load in the combustion chamber of a dual-fuel compression-ignition engine. The calculations were conducted for a four-cylinder forced induction engine, assuming that the volume of the drawn gas and air mixture equals the volume of the drawn air during mono-fuel operation.

Klimatyzacja centralna z klimakonwektorami wentylatorowymi z obejściem, uzdatniającymi mieszaninę powietrza z centrali klimatyzacyjnej i powietrza recyrkulacyjnego przez klimakonwektor w okresie letnim

Pisarev V.

Zeszyty Naukowe Politechniki Rzeszowskiej. Budownictwo i Inżynieria Środowiska

2010

z.57[271], nr 3

99-117

Omówiono podstawy projektowania zmian stanu powietrza w systemie klimatyzacji centralnej z klimakonwektorami wentylatorowymi z obejściem, uzdatniającymi mieszaninę powietrza z centrali klimatyzacyjnej i powietrza recyrkulacyjnego przez klimakonwektor w okresie letnim. Ponadto przedstawiono przykład obliczeniowy zmian stanu powietrza w systemie klimatyzacji.

In this study the basics of designing changes of air condition in the central air-conditioning system with a fan coil with the rounds of processing air mixture from the air-conditioning unit and recirculation air for a summer was analysed. Furthermore, an computational example of changes of air condition in the air-conditioning system was presented.