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MAN Energy, Corvus Energy & DNV GL Present Results Of HYCAS Study On Hybrid Power Generation

Logistic News - Published on Mon, 24 Jun 2019

Image Source: dnvgl.com
Speaking at the CIMAC conference in Vancouver recently, Dr Alexander Knafl, MAN Energy Solutions, presented the results of a new study which examines the potential of hybrid power solutions in light of tightening regulations on greenhouse gas emissions. The result of a cooperation between MAN Energy Solutions, Corvus Energy, and DNV GL, HYCAS examines the cost effectiveness of hybrid power solutions in a 1,700 TEU container feeder vessel. The pressure is on for the world to reduce its greenhouse gas emissions to avert a climate crisis. The IMO has set the maritime industry the ambitious task of reducing shipping emissions 50% by 2050, as compared to 2008. To work towards this challenge, MAN Energy Solutions, Corvus Energy and DNV GL studied the potential of using batteries in a container feeder vessel, to assess if it is possible to both reduce emissions and save operational costs.

Hans Anton Tvete, DNV GL, said that “There were several factors that went into the selection of a container feeder vessel for the study. We were looking at where hybrid systems could offer significant efficiency gains, which pointed to operational states with fluctuating power demand. This typically occurs with large consumers such as cranes, pumps, ventilation fans, or manoeuvring equipment, especially in port. Container feeders, with their frequent port stays and increased time in port, are ripe for efficiency gains through the use of hybrid solutions. Also, as this fleet is aging, new tonnage is likely to be on order in the near future.”

Carina Kern, MAN Energy Solutions, said that “Focusing on a container feeder vessel we were able to generate a typical propulsion power profile from vessel speed data, as well as an artificial time-resolved electrical load profile from the according electrical load table. These are the most important inputs for the MAN simulation tool ECO-ESS. Together with the specific battery and engine characteristics, it is possible to optimize the size of a battery in a hybrid propulsion system for the 2020 and 2030 scenario as an optimum of additional CAPEX and OPEX savings.”

The study explored two main scenarios, a vessel built in 2020 with a 500 kilo Watt hour battery system replacing one genset used for peak shaving and as a spinning reserve, and a vessel built in 2030, using a much larger 11 Mega wath hour hybrid system for zero emission port entry and exit. Under the first scenario, with the hybrid power train resulting in an approximately 13% total cost for the vessel, payback times are as low as two to three years. However, the larger system increases the costs of the vessel significantly, meaning that only with a combination of lower prices for the battery system and higher fuel costs than today would the system be economically attractive.

Sean Puchalski, Corvus Energy, said that “It is our hope that these study results will increase cargo shipowner confidence in seeking out new energy solutions, as a good economic rationale already exists for supporting auxiliary loads with a hybrid configuration. As for the future propulsion scenario, perhaps we will not have to wait until 2030. We are already seeing strong demand for high capacity energy storage systems in passenger vessels. With the right leadership from cargo owners, we may see this translate to the merchant sector sooner than later.”

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Posted By : Mohan Sharma on Mon, 24 Jun 2019
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