Ventilation cooling strategies and energy saving analysis for waiting halls of northern railway station

Evaluates the ventilation cooling partition and thermal comfort of natural ventilation in the northern area. Chooses the meteorological parameters of typical cities, and analyses the ventilation cooling effect and energy consumption of natural ventilation, mechanical ventilation, solar enhanced ventilation and evaporative cooling separately applied to the waiting halls of railway station using EnergyPlus software. The results show that mechanical ventilation and other enhanced ventilation strategies can effectively reduce the indoor high temperature hours in the region Ⅰ, with less than 5 days of the cumulative high temperature time, where only mechanical ventilation and other enhanced ventilation strategies are needed. In the region Ⅱ, the mechanical ventilation can effectively reduce the indoor high temperature hours and the energy saving effect is significant with the energy saving rate of about 35.8%, compared with air conditioning system. In the region Ⅲ, the evaporative cooling air conditioning system is a good method, with the energy saving rate of about 38.9% when adopting secondary evaporative cooling air conditioning system, compared with primary pump variable flow air conditioning systems. In the region Ⅳ, air conditioning system is the major method, and all fresh air system and night ventilation operation mode should be considered to make the most use of natural resources and reduce the energy consumption of air conditioning systems.