Page 31 - CARILEC CE Journal CEMAY2021

St. Thomas, US Virgin Islands

propane injected at 600 bar with light fuel oil give good engine performance with no smoke in the
(LFO) as the pilot fuel. In 1992, Wärtsilä utilized exhaust.
membrane pumps at 600 bar, which then was a Establishing the emissions credentials of the 32LG
limiting component in achieving higher injection engine and the deployment of appropriate mitigating
pressures. Today, a different type of pump and technologies in order to meet compliance levels are
pressure levels are utilized as is the case in the LG key aims of this paper. The results obtained in the
engine. Furthermore, some additional investigative Oskarshamn plant (circa 1994) shown below provided
works were carried out at VTT labs in Finland where a base line that will be better with the modern LG
LPG and LFO were mixed and fired in a normal engine thanks to its enhanced fuel injection system
diesel engine, confirming that higher pressures and resultant higher injection pressure.

OSKARSHAMN (600 bar, LPG fuel) - 1994
Diesel run 100% load: NOx at 15%O before SCR: 860 ppm; after SCR: 70 ppm
2
LPG run 100% load: NOx at 15%O before SCR: 534 ppm; after SCR: 70 ppm
2
The paper concludes that with WAPA having selected propane as its primary fuel for power generation and
LFO as the back-up fuel, the 32LG engine is the ideal choice for WAPA, given its high efficiency (relative to a gas
turbine), and with the application of secondary clean-up equipment, will achieve required compliance levels.

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