Virtual Energy Storage Model of Ventilation System for Flexibility Service

Virtual Energy Storage is a concept where flexible loads are used as conventional battery energy storage. This is a useful approach to provide flexibility service and avoid large expenses on energy storage equipment. This paper proposes novel methods to describe a ventilation system as a Virtual Energy Storage. These methods enable the possibility to use ventilation systems in flexibility service while requiring less data and parametrization than currently available methods. The mass balance analysis is used to derive robust methods to calculate power capacity, energy capacity, State of Charge, etc. Methods are tested with a simulation on an object which is constructed in IDA ICE. In the simulation two use cases are considered: office and apartment. Based on the year 2022 price data and reserve activations the total costs of energy could be decreased by up to 35% if the system is used in flexibility service.