Internal Microclimate: Optimal Design in the Use of Solar Energy to Enhance Ventilation in Buildings

摘要

A steady state mathematical model for a solar chimney has been used to enhance the effect of thermally induced ventilation in buildings. In this work, the analytical model employed takes into account different sizes of the openings of a solar chimney with varying values of the discharge coefficients. Numerical calculations performed for different values of ambient temperature and solar radiation show that a solar collector area of 1.80m~2 is able to induce airflow between 2.64 (m~3/hr) to 3.72 (m~3/hr) for solar radiation of 280 (W/m~2) and 850 (W/m~2) respectively. From the optimization result, total area of collectors has been estimated to be 10.9 m~2 - rectangular base - for a hall of 4050m~3.