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Water cooling is essential for Power Electronics and Battery & Energy Storage Systems in electric & hybrid marine applications, explains Mr. Teemu Alajoki, R&D Manager at Adwatec Ltd

R&D manager Teemu Alajoki says that Adwatec’s design philosophy is to build robust, reliable and compact turnkey systems to withstand tough marine conditions in high seas

Article in Electric & Hybrid marine technology international / April 2018 issue


“With liquid cooling the waste thermal energy can be re-used for heating or transferred to sea water or to raw water system with a heat exchanger”, explains Mr. Alajoki.

Adwatec’s cooling system design is based on temperature balance, where the role of liquid cooling is critical. Heat losses in the system must be transported effectively away from the electrical components. Power density of electronics is continually increasing together with the heat output. Water is an ideal cooling method for vessels due to its excellent cooling capacity and space efficiency.


“A new member in our cooling solutions portfolio is liquid cooling for batteries and energy storages. Now you can get all your water cooling solutions for power electronics and batteries from one supplier”, says Mr. Teemu Alajoki.

Adwatec has worked with liquid cooling systems over 15 years. “Plug and play” -cooling stations are easy to assemble and use. Commissioning takes only 30 minutes due to automatic de-aerating.

Use of valve block technology minimizes the number of fittings in the system. This, together with the absence of rubber hoses, minimizes leakage risk. Long life is ensured with aluminum and stainless steel surfaces in coolant circulation. Copper-based materials and carbon steels are not used to avoid galvanic corrosion and slush build-up in the coolant and heat sinks.


“Cooling control is always slave to the power electronics master controls. Thus the communication to upper level systems is crucial. Adwatec keeps master system up-to-date with hard wired contacts, Profinet or Profibus protocols based on customer needs”, Teemu Alajoki tells about the control system.

In ships, space is always limited and the smaller the system footprint needed for engineering, the better. The use of space is efficient with cabinet footprints starting from 400 x 600 mm. Installation and commissioning are also made fast and easy with Adwatec design. Typically, when the cooling station is made to fit into a small space, it results in difficulties in servicing. Usually many components are in places that are impossible to reach without having to disassemble the equipment. The problem is solved with the help of Adwatec’s modular construction. All components are easy to see and reach and thus the visual inspection and service time is the shortest possible, which is a big advantage for marine applications.


Fundamental requirement for cooling is that the coolant will stay in the system. To minimize leaking possibilities and to use proper sealing solutions are keys to reliable operation. For worst case scenarios we have developed a unique leak detection system”, says R&D Manager Alajoki.

Absolute tightness of the system is imperative when designing cooling stations and correct materials in contact with the proper coolant in a closed-loop cooling system will guarantee maintenance-free cooling.

All essential equipment at any vessel must be designed and manufactured according to classification rules. Adwatec’s cooling stations have been classified by all major classification organizations and the stations are in use in many marine and offshore applications.


According toR&D Manager Mr. Teemu AlajokiRobust, reliable and compact turnkey systems, designed and built for tough Marine conditions at high seas has always been the design guideline at Adwatec”.


Read the whole article in Electric & Hybrid marine technology international / April 2018 issue HERE


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