Coupling natural ventilation and thermal mass for low energy housing

Abstract

This dissertation explores how natural ventilation and thermal mass affect the thermal performance of a building. The author was inspired by traditional and passive methods for cooling used in hot countries. A low-income housing block was monitored and used as a case study to test all theories with the aim of improving future designs in terms of ventilation and thermal mass. Questionnaires were carried out to assess, in a qualitative manner, the thermal conditions in Block 15 as seen by the residents and respondents. The replies from these interviews showed that winter comfort is more acceptable by residents while in summer thermal conditions are not. Responses led to the author trying to alter the building's fabric in order to control flow rates, and provide less unpleasant draughts and better thermal comfort tor residents by applying passive strategies. Special attention was given to the impact of the internal yard and opening configurations on thermal comfort. Alterations in design were provided for this space to control excessive flow rates within apartments and also provide improved air temperatures within buildings. Results demonstrate that the mass of the building plays an important role in controlling temperatures.