Overview of Molten Salt Storage Systems and Material Development for Solar Thermal Power Plants
نویسندگان
چکیده
This paper gives an overview of thermal energy storage (TES) systems based on molten salts. It summarizes stateof-the-art molten salt TES systems. Storage systems in a research stage, such as the thermocline and floating barrier concepts, are also discussed. The paper summarizes previous work on molten salt material investigations at DLR. Experimental results of novel salt formulations with melting temperatures well below 100 °C are presented. An overview of temperature dependent thermophysical property values of Solar Salt is given. The thermal stability of nitrate/nitrite mixtures was examined by dynamic thermogravimetry and static measurements at constant temperature. We discuss in this paper the impact of the atmospheric conditions (partial oxygen pressure) and salt composition on the stability of nitrate salts. At DLR, a molten salt test loop is in the design stage. A scheme of the test loop and the options for experiments are presented.
منابع مشابه
A Novel Modeling of Molten-Salt Heat Storage Systems in Thermal Solar Power Plants
Many thermal solar power plants use thermal oil as heat transfer fluid, and molten salts as thermal energy storage. Oil absorbs energy from sun light, and transfers it to a water-steam cycle across heat exchangers, to be converted into electric energy by means of a turbogenerator, or to be stored in a thermal energy storage system so that it can be later transferred to the water-steam cycle. Th...
متن کاملOn the Convenience of Using Simulation Models to Optimize the Control Strategy of Molten-Salt Heat Storage Systems in Solar Thermal Power Plants
Thermal oil has been used as heat transfer fluid in many solar thermal power plants, which also use molten salts as thermal energy storage system. Since the engineering of these plants is relatively new, control of the thermal energy storage system is currently achieved in manual or semiautomatic ways, controlling its variables with proportional-integral-derivative (PID) regulators. Once the pl...
متن کاملCoupling Supercritical and Superheated Direct Steam Generation with Thermal Energy Storage
Two new concepts have been identified for direct steam generating solar fields that charge a two-tank molten salt storage system. The use of both supercritical and superheated subcritical steam is proposed, and discussed in practical terms and with regards to thermodynamic issues of heat transfer to the salt. Both concepts are found to allow significantly higher hot-tank temperatures than solar...
متن کاملCyclic Operation of Molten-Salt Thermal Energy Storage in Thermoclines for Solar Power Plants
متن کامل
Novel Ionic Liquid Thermal Storage for Solar Thermal Electric Power Systems
Feasibility of ionic liquids as liquid thermal storage media and heat transfer fluids in a solar thermal power plant was investigated. Many ionic liquids such as [C4min][PF6], [C8mim][PF6], [C4min][bistrifluromethane sulflonimide], [C4min][BF4], [C8mim][BF4], and [C4min][ bistrifluromethane sulflonimide] were synthesized and characterized using thermogravimetric analysis (TGA), differential sca...
متن کامل