Performance Analysis of a Hybrid Solar Energy Storage System

In this work, a method for increasing the storage capability of a solar thermal energy system has been
discussed. The system includes two tanks with the flexibility in choosing the best storage medium on
the basis of the solar collector’s outlet temperature. The results show that using such a hybrid storage
system, the storable energy can be increased. Comparing the results with those for simple common
storage systems, the extent of improvement was calculated.
For verification of the results, a small pilot system was assembled. The test apparatus operated during 2008-2009 cold months and the parameters were recorded. Comparison of the theoretical and
experimental results showed a good agreement.