Thermal Energy Storage
摘要
The storage of thermal energy is a core element of solar thermal systems, as it enables a temporal decoupling of the irradiation resource from the use of the heat in a technical system or heat network. Here, different physical operating principles are applicable, which enable the energy to be stored. Central parameters for the technical and economic evaluation of storage systems are storage capacity and length, whereby the storage materials and fluids in particular play a decisive role since they influence the charging and discharging dynamics as well as the efficiency. In the course of the chapter, various storage concepts, their basic mode of operation as well as terminology and evaluation variables are explained and presented.