MAN Energy Solutions has claimed to have become the first turbocharger manufacturer to establish VTA as standard for large-bore, four-stroke engines after it announced that it will incorporate the technology across its 51/60 engine range.
Under the VTA concept, the volume of charge air can be precisely matched to the quantity of injected fuel at all points in an engine’s load and speed range by adjusting the vanes on the nozzle ring automatically. This has several benefits, including: significant fuel savings, improved dynamic performance, fuel flexibility: smart control management means engine adapts itself automatically to get to best possible operating point, range extension: it includes elevated ambient temperature without de-rating and peaking balance: handles load fluctuations.
MAN Energy Solutions reports that the typical payback period for VTA on MAN engines will be one-and-a-half to two years, and that its next step is to make VTA standard for its MAN 51/60G engine type. It also states that its PrimeServ Academy has already increased the VTA training portofolio, due to its rising importance, citing the new VTA-VacSeal four-stroke course that was introduced in September 2018 as an example of this.
Stefan Terbeck, Project Manager for the MAN 51/60 engine series at MAN Energy Solutions, said: “High-tech solutions are necessary to meet the market’s demanding requirements and – with this announcement – we have really delivered. VTA turbochargers are becoming more and more important, especially when it comes to gas engines. VTA has already been applied from our licensee, Kawasaki Heavy Industries, which has reported excellent performance and high reliability on their engines. Furthermore, the VTA concept is even now employed commonly in the significant formaldehyde-manufacturing segment.”
MAN Energy Solutions reports that it already has more than 380 references of turbochargers sold with VTA technology, and that VTA is approved for its TCA turbocharger sizes TCA55 to TCA88 – both for marine and power applications.
Terbeck added: “We collected more than seven years of operational experience before approving VTA technology as standard. As a result, our 51/60DF engine is getting a proven, field-tested product.”