Evaluation of thermal performance of a solar chimney with two independent modes and air injection from the floor - Case study: Office building in Kerman

The major share of energy consumption in the building sector includes cooling and heating systems. However, today the need for thermal comfort of users is met by using mechanical equipment. Passive design method can help maintain comfortable thermal conditions in buildings and reduce energy consumption by minimizing the use of mechanical or electromechanical air conditioning systems. In particular, the implementation of solar chimneys to ventilate the interior of the building reduces energy efficiency. Solar chimney is a passive and innovative design. In this article, an evaluation of thermal comfort performance in a government building with and without solar chimney integration in Kerman is presented, which is modeled by Design Builder simulation program and using fluid dynamics method. (CFD) The temperature distribution and airflow were studied. The results of this study showed that the integration of solar chimneys can reduce the PMV (predicted average vote) by 55% compared to the base building and its values ​​to The standard range of Ashri 55 and ISO 7730 is approaching. In the continuation of the research, experiments were performed on creating the lower cavity of the solar chimney. So that the PMV thermal comfort criterion from 4.63 units to 2.56 units and the average room temperature in the hottest month of the year (July) from 36.21 degrees Celsius to 33.61 degrees