Abstract
We pursued the energy consumption of the HVAC system in a campus to operate the most suitable condition. First, we measured thermal loads in a seminar building at the periods of summer 2006 and winter 2007. On the basis of the data, we analyzed the correlation among the outdoor condition and the number of students. Furthermore, we build the numerical model for thermal loads of the HVAC system by using the correlation. As results, we obtained the good-coincidence between the measured thermal loads and the simulated thermal loads.