Investigation of the e ect of walkway orientation on natural ventilation

Proper orientation of walkways, based on regional winds and local shade, provides good control over walkway ventilation. The architecture of the old town of Sirjan had experimentally orientated the cityʹs walkways in such a manner that the shadows in the walkways produced the maximum possible natural ventilation in this hot and dry town. This study has focused on the optimum design of Sirjan city considering a natural ventilation mechanism. At rst, a typical walkway with certain geometric parameters is considered. Then, considering the symmetry of the shadows cast in the walkway, the natural ventilation rate is investigated at 7 dierent angles and at 15 intervals. The problem is modeled using the nite volume method, numerically, with the climate conditions of the town. Results show that the present orientation of walkways in this city creates the maximum possible rate of natural ventilation and thermal comfort.