Commissioning of a Coupled Earth Tube and Natural Ventilation System at the Post-Acceptance Step

In this paper, the environment and energy performance of an actual coupled earth tube and natural ventilation system in a gymnasium was measured during the post-acceptance step in two operation states: no ventilation and natural ventilation. From the measurement result, the authors conducted the commissioning for this system. By the use of the CFD (Computational Fluid Dynamics) coupled analysis with natural ventilation method, the natural ventilation air volume and the indoor temperature in summer and autumn while windless have been calculated. Several findings were obtained and informed to the operator.