Abstract
Thermal storage systems used in a building HVAC system is considered to be an important technology for energy conservation in building sectors as well as for reduction of CO_2 gas emission coupling with the current global warming issues. It is reported, however, that the energy conservation is not achieved in the real field due to lack of proper operation of the system. In this study, optimal operation scheme developed in previous report was applied to thermal storage systems used in a real building. And the result of trial operation is shown. The expected error percentage (EEP) of the daily summed cooling load was 9.8%, which shows the cooling load prediction method is accuracy enough for practical use. System COP was improved about 13% by optimal operation.