Thermal comfort and ventilation performance of retrofitted apartment houses

摘要

The primary purpose of the present study was to evaluate the effects of retrofitting of window sashes by measuring air tightness performance and thermal environment of apartment houses built during the period 1965 - 1974 before and after the retrofitting of window sashes. Also, ventilation rate in each zone and air tightness on room fittings were determined in multi-zone type dwelling units, and evaluation was made on ventilating simulation between multi-zone dwelling units. From the results of actual measurement, it was found that room fittings made of aluminum had relatively high air tightness performance even before the retrofitting, and that ELA (Effective Leakage Area) decreased in all dwelling units by about 30% in these dwelling units. Before retrofitting under natural ventilation, the influence of outdoor wind was observed in ventilation rate of each zone, depending on the arrangement of zones. After retrofitting, almost no expectation can be put on ventilation rate of each zone, but it was confirmed that a constant ventilation rate could be maintained by introducing mechanical ventilation equipments. By the retrofitting of window sashes, variations in depth direction of floor surface temperature could be improved.