After the standalone tests on the storage were completed, the storage was integrated into the new system for solar heating and cooling at the ZAE Bayern. Starting in fall 2007, the performance of the system was monitored during operation [2, 3].

1.2. Cooling mode

To test the system design-point performance (Fig. 7), between 12:00 and 16:00 the outlet temperature of the dry air cooler was fixed to 36 °C by adjusting its ventilator frequency.

After the warm up of the absorption chiller, the system provides about 10 kW chilled water using 14 kW of driving heat at about 90 / 80 °C, as designed. 50 % of the reject heat is delivered by the dry air cooler at 41 / 36.5 °C and the latent heat storage at 36.5 / 32.5 °C in each case. In the evening, the return temperature from the dry air cooler is sufficient for discharging the latent heat storage and cooling the absorption chiller simultaneously. The latent heat storage is then completely discharged during night time.