Neumann, HannahHannahNeumannGamisch, SebastianSebastianGamischGschwander, StefanStefanGschwander2022-03-0624.8.20212021https://publica.fraunhofer.de/handle/publica/26914610.1016/j.applthermaleng.2021.11723210.24406/publica-r-269146Latent heat storage is one option to increase the efficiency and reduce CO2-emissions of process heat applications in the temperature range between 100 °C and 250 °C. In the present study a latent heat storage system based on flown through heat exchanger plates according to the FracTherm®-design is examined. The sugar alcohol d-mannitol is used as PCM. A simplified capacity resistor (RC) simulation model is developed. In contrast to common RC-models, this model can simulate free convection of the storage material in liquid phase during charging. Additionally, a detailed physical simulation model based on the Finite-Element-Method is developed and validated with measured data. A verification of the new RC-model and the FEM-model is carried out. The mean deviation of the outlet fluid temperature between both models is 0.62 K. The mean deviation of the PCM-temperature is 0.85 K. Due to the 20 to 30 times shorter simulation time, the RC-model is well suited for dimensioning and optimizing plate type heat exchangers for latent heat storages.enThermische Systeme und GebäudetechnikSolarthermische Kraftwerke und Industrieprozesseenergieeffizientes GebäudeThermische Speicher für Kraftwerke und IndustrieIndustrieprozesse und ProzesswärmeThermische Speicher für Gebäude621536697journal article