【作者】

Erlend Vaktskjold, Leif-Arne Skarbo

【摘要】

论文已在中国上海举行的2013年CIMAC大会上发表。论文的版权归CIMAC所有。The pioneering Bergen SI lean burn marine gas engine portfolio has been established and launched to the market through the previous 8 years.The marine gas engine portfolio builds on the strong pedigree of the Rolls-Royce Bergen lean burn SI gas engines for land based power applications. The first steps towards the marine gas engine applications were taken by the initial adaptation of the classic KV-Gas series for gas electric propulsion in a series of Norwegian car passenger ferries in 2006. The first 16 engines have now accumulated more than 500,000 running hours with individual engines at 41,000 hours+. The next move was the introduction of the B35:40V marine gas series in 2008, and the newly designed C26:33 L-series in 2010. Both of which have been put to use in mechanical drive variable speed applications. In 2012 the range was completed by the introduction of the B35:40-L-series. The development of the marine gas engines aims at mechanical drive propulsion application as well as marine genset applications, both incorporating the ’Inherently Safe Gas Concept’ with double walled gas supply systems with ’block and bleed systems’ installed. Strong aspects of the marine lean burn gas engines are low specific fuel consumption, good transient load performance combined with very low NO x , SO x , CO 2 and UHC emissions. This paper will concentrate on: a) The development of the B35:40-series with emphasis on the L-version. b) Reviewing experience and practical aspects of lean burn gas engines in general and marine mechanical drive variable speed applications in particular. a) Engine Design The B35:40L Marine Gas Series is a relatively compact design comprising a 350 mm bore on a 520 mm cylinder distance. The stroke remains at 400 mm as for the V-version. Also, the engine series is equipped with the latest version of the fuel gas piping system where the engine is fed with a single pressure regulated gas supply which is split on the engine between pre-chamber and main chamber supply. This design allows a simplified piping arrangements on the engine and between the gas regulating ramp and engine without any sacrifices in performance. b) Practical aspects of using SI lean burn marine gas engines Applications so far employed and to be covered in this paper are: ferries for passenger and cars, cargo ships, RoPax ferries and tug boats with both gas-electric and mechanical drive of controllable pitch propeller, variable speed and variable load, also twin input- single output gearbox applications, including individual requirements for different applications.Included is also a review of the engine operation limits, as employed in the Bergen lean burn marine applications, showing how transient loading limits and load increase rates affect the applications of Bergen lean burn gas engines.

【会议名称】

第27届CIMAC会议

【会议地点】

上海

【下载次数】

1

返回