What kind of Storage tank Component is best for specifying the following condition. The Heat Transfer fluid gets heated by Solar Energy and the heat is transferred to the Storage Medium in the tank without any mixing between the two fluids. Then the Heat from the Storage medium is transferred to a load which is having a heat transfer fluid without any mixing and just by heat transfer. The heat transfer fluid on the solar side and the load side are the same. The operating temperature range is about 450 degree Celsius.