Our air quality needs to be improved and the best way to do that is by decreasing the harmful emissions from engines. This is worldwide recognized fact. Also it is well known fact that diesel engines are one of the greater contributors of emissions. On the other hand, diesel engines are the “work horse” of global industry and many people, businesses and Governments are afraid that by bringing in harsh standards on commercial diesels the operational costs for their transportation will be affected. Therefore, the engine concept has to combine optimum efficiency with low emissions. It means that any credible environmental technology should be capable of reducing operational cost and exhaust gas emissions simultaneously. Is such an objective incompatible and contradictory? Currently, the answer is "yes" because none of the existing emission control technologies, including direct water injections, fuel/water emulsification, SCR, EGR, DPF, etc., satisfy these requirements. However, the water injection system (CWIS) designed by M.A. Turbo/Engine Ltd. of Vancouver, Canada, meets all the above criteria which is something that has never been achieved by other technologies. This development have led to a new relatively inexpensive technology that greatly cuts down on diesel emissions as well as saves on the operating costs of the engine.
Although CWIS is specifically designated for economic retrofit of existing diesel engines, it can also be fitted on newly built engines, either separately or in combination with other emissions control technologies. Due to the recent and upcoming regulatory changes pertaining to air emission, it has become essential to assess not only the current emissions levels from transportation industry and the level of reduction necessary to comply, but also the means available of achieving these emissions reductions.
Water injection - a cost effective solution for emissions and operational cost reduction
Dr. Anatoly Mezheritsky P.Eng. President.
CWI System for two stroke main Sulzer 4RTA58 @ 6,200 hp. Results achieved: NOx reduction – 22%, estimated fuel consumption reduction – 2.5%. August 2001. Vessel: fruit carrier Bebedouro, Cargill International, Geneva.
CWI System for 4-stroke Wärtsilä 6-8R22 (three auxiliary engines). Results achieved: NOx reduction – 27%, estimated fuel consumption reduction – 2.5%. Vessel: fruit carrier Bebedouro, Cargill International, Geneva.
CWI System for naturally aspirated two stroke Detroit 7122-7000 @ 360hp (two main engines). May 2002. Results achieved: NOx reduction – 26%, PM reduction – 9%, no side effects to the engine during six months of permanent operation with CWI. Vessel: ferry Oski, Blue & Gold Fleet, San Francisco.
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