Ventilation system design for urban utility tunnel

Based on an engineering project, discusses the function, design principle, ventilation calculation methods and the control and operation strategies of ventilation system for urban utility tunnel. Summarizes the heat release calculation formula of the different pipelines in urban utility tunnel, and discusses the waste heat calculation method of each compartment. Considering that the maximum current carrying capacity of each power cable occurs at different times, proposes the coincidence factor to correct the total waste heat for power cables in different compartments.