With electric power and an innovative design that considerably increases sustainability, reduces emissions and maximizes driver experience, the hybrid EdiLog has taken a position as the next generation’s log stacker. Östrand’s wood handling yard is the first to use EdiLog.
Since the 1970s, Engbergs Transportsystem has handled the transportation related to wood handling at Östrand pulp mill. Large log stackers are among the machinery that operates 24 hours a day, year-round at the yard. In 2015, Engbergs performed a study to see if contemporary log stackers could be further developed.
“It stands to reason that with an empty weight of 80 tonnes and a lift capacity of around 30 tonnes, it should be possible to recover kinetic energy and even potential energy. We measured our log stackers over the course of a few months in 2015, very carefully. We collected several million rows of data. The results were startling. It wasn’t what we were expecting at all – instead, the greatest savings were in going from a standstill to a speed of about 1 m/s. Something that happens hundreds of times a day. The calculations showed that we could save approximately 5% by re-utilizing kinetic energy, 5% by reducing idling and almost 25% by having more efficient starting and stopping. Was it too good to be true?” wondered the company’s owner Kjell-Arne Engberg.
Engbergs applied to the Swedish Energy Agency and in the summer of 2016 received a grant to certify the calculations. They also wanted to try to create the same driving experience that today’s log stackers have.
“We rebuilt an old vehicle and only tested its operation . Other improvement measures had to wait, primarily for economic reasons. After several thousand hours of test driving, we could see fuel consumption savings of 28%.”
Encouraged by the results, Kjell-Arne contacted several log stacker manufacturers, with meager results.
“The closest we got was Mantsinen, where we finally signed an agreement to acquire the product rights to the log stacker they manufactured and marketed. We sent another application to the Swedish Energy Agency, which we won ahead of Volvo, Scania and the majority of Sweden’s universities for another grant. This was very inspiring.”
In May 2017, Engberg started a new company, Edilog, and began to hire personnel. In the autumn of 2017, he went on an information tour around Sweden to meet potential customers. The new log stacker has everything in its favor. Besides lowering the operating costs compared with conventional log stackers, the machine also reduces CO2 emissions by 125 tonnes annually, per machine in constant operation.
The machine is also built so it can be reused. After around half of the steel structure’s lifespan, the components can be replaced, prolonging the vehicle’s life and reducing its cost.
At the moment of writing, machine number one has been delivered to Östrand and the study visits along with test drives performed so far have resulted in two quotations. Dan Bakkman, one of Engbergs Transportsystems log stacker drivers at Östrand pulp mill, is very pleased with his new work vehicle.
“The log stacker has superior comfort, a noise level that is future-proof and lower fuel consumption.”
Edilog is an innovation that is completely in line with SCA's contribution to a fossil-free world. Sweden will become one of the world's first fossil-free welfare nations and be fossil neutral until 2045. SCA wants to contribute to this conversion and one of our sustainability goals is that our value chain should be fossil-free.