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近年来,为提高动力装置的效率,余热回收已成为一个很热门的课题。柴油机提供了多种余热源,即废气、增压空气、气缸冷却水和滑油等,这些余热可被用来生产蒸汽或热水。余热回收的可能性和对效率的改善同余热的利用方式和连续性有密切关系。即使技术是现成的,剩余能量能被有效利用,也必须在一个合理的时间内偿还投资成本。到目前为止,许多余热回收装置仅在低水平上利用剩余能量,例如加热重油、生产热水,但这些并不能使原动机的整机热效率有任何程度的提高。一种实用的余热回收形式是使用一台动力涡轮回收,在Sulzer RTA系列低速二冲程柴油机中被称为增效系统。
In recent years, in order to improve the efficiency of power plant, waste heat recovery has become a hot topic. Diesel engines provide a variety of residual heat sources, namely exhaust gas, charge air, cylinder cooling water and oil, which can be used to produce steam or hot water. The possibility of waste heat recovery and the improvement of efficiency are closely related to the way and continuity of utilization of waste heat. Even if the technology is readily available, the remaining energy can be effectively utilized and the investment costs must be repaid in a reasonable amount of time. To date, many waste heat recovery units utilize only the remaining energy at a low level, such as heating heavy oil to produce hot water, but these do not result in any increase in the overall thermal efficiency of the prime mover. A practical form of waste heat recovery is the use of a power turbine for recovery, referred to as a synergistic system in the Sulzer RTA series low-speed two-stroke diesel engine.