You are asked to estimate the amount of heat that can be stored overnight in a solar heated building, which has a storage space of 6 m3. The solar system uses water with antifreeze in the collector, and there are two options for storing the heat overnight. One option is to use water with an allowable temperature change of 30°C. The other is to use a Glauber salt, which undergoes a phase change at approximately 30°C with a heat of fusion of 329 kJ/L. In both instances, a heat exchanger will be necessary in order to meet building code. Discuss the advantages and disadvantages of the two options.