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Marine ORC: A fully automated WHR ORC prototype for Marine applications

The Marine ORC prototype unit is based on a conventional low-temperature subcritical Organic Rankine Cycle using R134a as working medium. This experimental unit has been designed as a waste heat recovery system for the jacket water of marine diesel auxiliary internal combustion engines (ICEs). In order to operate, it requires a heat input in the order of 90kWth at a low-temperature (appr. 90oC), and is supplied via an intermediate plate heat exchanger (evaporator).

Its modular design allows the access through narrow openings and its installation time on site requires from 18 to 36 hours, depending on the onsite characteristics.

Its automation & control system allows the stand alone or the manual mode operation. An independent PLC ensures the forced shutdown in case of emergency.

With the use of a touch screen and the Labview Software, a Human Machine Interface (HMI) was accomplished, allowing the operator to monitor all the operation parameters, access trip and alarm log files and download data logs.

Finally, the remote control and access is also an option.

It has been found to be compliant with DNVGL Rules for Ship PT. 4 Ch. 6 (January 2017).

Future developments: The scale up of the unit is one of the priorities of the Laboratory. A modular prototype unit of a 20kWel (200kWth) will be developed. Collaboration with third parties is envisaged.

Note: The development of the Marine ORC Project was co-founded by DNV-GL.

You may see the Marine ORC in operation in the following video:

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