Speaker: Brad Schofield (BE-ICS-AP)

The use of Digital Twins in the design of the waste heat recovery project for Ferney Voltaire

In order to improve its energy utilization, CERN will deploy a Waste Heat Recovery system at LHC point 8 which will provide heating power to Ferney Voltaire. To study the effects that the heat recovery plant will have on the cooling system, a 'digital twin' of the cooling plant was created in the simulation tool EcosimPro.  The study was carried out in collaboration between EN-CV and BE-ICS. The primary question of interest was whether the existing control system of the cooling plant would be capable of handling transients arising from a sudden shutdown of the heat recovery plant.

The simulation model was connected via the communication protocol OPC-UA to a PLC implementing the cooling plant control system. This 'virtual commissioning' setup was used to study a number of scenarios representing different cooling loads, ambient temperature conditions, and heat recovery plant operating points. Upon completion of the investigation it was found that the current cooling plant control system will be sufficient to deal with the transients arising from a sudden stop of heat recovery plant operation.

In addition, current work to create a generic 'digital twin' bridge between an arbitrary UNICOS control application and an EcosimPro simulation will be presented.  This work is being carried out in collaboration with TE-CRG in order to migrate the existing Cryogenics simulator to OPC-UA.

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