Seasonal Storage Coupled To Solar Combisystem: Dynamic Simulations for Process Dimensioning
Abstract
The objective of this preliminary study was to address the potential of thermochemical long-term storage coupled to standard CombiSystems available on the market. Thanks to high reaction enthalpy, chemisorption process enables compact long term storage without heat losses. By connecting storage process directly on buffer tank, annual solar fraction can be greatly increased. Dynamic simulations have been performed using thermodynamic simplified model for the storage process. Results lead to determine most profitable configuration among numerous interdependent parameters: thermal performances required for the system, collector area, storage volume, fractional energy saving objective, climate, building … Detailed analyses and parametric studies indicate the tricky points and some ways to optimise annual energy saving for various conditions. Reactor performances are important; salt selection, heat and mass transfer of the reactive layer are essentials. And parameters that concern global process, such as geothermal temperature, have huge influence also.