At Lindholmen’s technical high school in Gothenburg, the mechanics and repairmen of the future are trained. In the school’s machine lab, specially equipped ship engines with state-of-the-art emission control provide students with unique opportunities to gain hands-on experiences in maintaining, troubleshooting and repairing engines – under realistic but supervised conditions. Diesel Power was entrusted to supply and install the equipment.  

The requirements of the procurement were demanding – both on the equipment and on the supplier’s competence. The goal was to create a machine lab where engines can function and students can work exactly like in a real ship environment – however placed on dry land.

Service-friendly Kohler units

The main equipment in the machine lab is two generator units from Kohler, which are normally used to generate electricity on ships.

Each cylinder has a separate cylinder head, which is an advantage in teaching, and the generator units are started with different types of ignition: one has an electric starter and the other has been equipped with an air starter from Gali. This allows students to learn how to handle both start-up methods. The engines can run at full charge in the lab.

Ready for start Carl Rapp, Service Manager at Diesel Power, tests the generator units in the school’s machine hall.

With the future in mind

EcoPar is used as a fuel for the machines, a very clean fuel based on synthetic paraffin oils. EcoPar is free from both sulfur and aromatic hydrocarbons and thus smells much less than standard diesel – which results in a good working environment in the lab.

Compared to conventional diesel, the climate impact is also reduced: carbon dioxide emissions are halved and NOx levels are reduced by up to 60 %.

AdBlue finishing for minimal emissions

The engines are equipped with an advanced exhaust aftertreatment system that meets industrial EU Stage 5, the emission requirements of which are significantly stricter than those applied at sea.

The low emission levels are achieved through selective catalytic reduction (SCR), where AdBlue is added before the exhaust gases reach the catalyst. AdBlue is a mixture of water and urea, a nitrogenous and completely harmless chemical compound also known as a urine substance.

The liquid helps to break down the harmful nitrogen oxides in the exhaust fumes to water vapour and nitrogen. NOx emissions do not exceed 0.4 g/kWh and the post-treatment also reduces the amount of soot particles by 98 %.

Eats nitrogen oxides for breakfast A carefully calibrated dose of AdBlue breaks down nitrogen oxides into harmless water vapour and nitrogen.

High-level cooling

The cooling water from the engines is pumped up onto the school roof, where the heat is emitted – 26 meters above ground level.

A penthouse for motor lovers Carl Rapp, Service Manager at Diesel Power, takes a breath of air among radiators and fan air coolers on the school roof.

A load bank on the roof On the school roof a load bank is installed, which is an electrical load resistance that generates heat energy.

Motor paws vs. concrete slab: 1-0

On board a cargo ship, engine vibrations tend not to be a major problem for the crew. But in a property, noise and vibration can resonate in the building in a disturbing way.

Since the base foundation in the machine lab was not suitable for ship engines in operation, Diesel Power developed a solution based on vibratec engine paws that effectively isolates the vibrations.

Enjoy the silence In the machine hall there are noises, of course, but the motor paws from Vibratec make sure that students in other parts of the school can concentrate on their studies.

About the equipment in the machine lab

  • Engines: 2 x Kohler generator set300EFOZC (300 kW)
  • Starters:: 1 x electric starter, 1 x air starter from Gali.
  • Emission control: After-treatment system from Xeamos with selective catalytic reduction (SCR) where AdBlue is added as a reducing agent.
  • Fuel: EcoPar, a non-toxic fuel that meets the European and US standard for diesel oil.
  • Environmental performance: Meets Industrial EU Stage 5.
  • Vibration damping: motor paws from Vibratec.

Om About Lindholmens technical gymnasium

  • Offers several technical programmes, including Maritime Education and the Technology Programme.
  • Is the first secondary school built in Gothenburg in 25 years.
  • Was ready in the autumn of 2020.
  • Has room for 1,000 students.

Variable effect The machines can be charged with 0-600 kW and the emission control system is monitored in real time.

Do you want to know more about products from Kohler? Contact Carl Rapp, Service Manager, Technical Manager & Aftermarket – Marine division on carl@dpower.se.