Energietest des thermischen Systems
The thermal energy storage (TES) of an actual district energy (DE) system is analyzed thermodynamically, using energy and exergy approaches. With a case study, the results for the TES of the DE system are verified with previous studies. The actual case considered is
What are thermal energy storage systems?
Thermal energy storage (TES) systems provide both environmental and economical benefits by reducing the need for burning fuels. Thermal energy storage (TES) systems have one simple purpose. That is preventing the loss of thermal energy by storing excess heat until it is consumed. Almost in every human activity, heat is produced.
What is a sample chemical thermal energy storage test apparatus?
Fig. 8 shows a sample chemical thermal energy storage test apparatus . The figure shows the test set–up for chemical thermal energy storage. It has mainly a reactor where the chemical storage material is contained and a steam generator.
When does the TES provide energy for the Friedrichshafen de system?
The TES in the Friedrichshafen DE system provides energy for the DE system when the top temperature of the TES is higher than 55.4°C; otherwise, the TES does not provide heating. From March to August, Qc and Qin for each month are increasing, which means the energy of the TES is increasing every month compared to the previous month.
What is heat storage material type based TES system?
Heat storage material type based TES systems A wide variety of materials are being used for thermal energy storage. TES materials must possess suitable thermo–physical properties like favorable melting point for the given thermal application, high latent heat, high specific heat and high thermal conductivity etc.
What is a high temperature TES system?
Medium temperature TES systems operate in the temperature range of 100 °C-250 °C. Sugar alcohols and chemical sorption storage materials are the main TES materials in this range. High temperature TES systems operate in the temperature range above 250 °C. Salts, earth materials, concrete and metals are the main TES materials in this range.
How efficient is Friedrichshafen thermal energy storage?
Friedrichshafen Thermal Energy Storage: Actual and Design Variances Raab et al. after years of observations explained that a moderate efficiency of 60% for the Friedrichshafen TES is due to heat loss . The heat loss of the TES in the design stage was considered to be an annual maximum of 220 MWh.