The Thermal Comfort Simulation Of Straddle-type Monorail Train

Monorail trains air flow and heat transfer within the rational organization of modern air-conditioned bus design important, but the evaluation of thermal comfort inside the car is monorail train design to pursue an important reference index, is also to enhance China's single-track an important way to develop the level of vehicle. As the air velocity and temperature inside the distribution of environmental comfort evaluation is a vehicle basis, so the design process should take into account car import and outlet size, location, air quality, air velocity and inlet temperature on the inside flow field.In this thesis, the fluid flow and heat transfer dynamics equation, first air-conditioned bus for evaluation of indoor thermal comfort evaluation system for a comprehensive analysis of research, and to introduce the international air-conditioning is widely used to determine indoor thermal comfort The PMV-PPD evaluation method trains the air quality, air distribution and thermal comfort was evaluated by analysis. Secondly, on the straddle-type monorail train within the thermal comfort conducted a simulation analysis, the main contents include a comprehensive analysis of the structure in indoor air flow characteristics, on this basis, build a simulation analysis for thermal comfort of the monorail train car within the simplified CAD model to determine the thermal comfort calculation for the boundary conditions, and the body and the body heat load of heat transfer coefficient was calculated; to adopt a common CFD software, air-conditioned train internal air flow and heat transfer conditions were Simulation research and analysis to get inside the indoor air pressure, velocity and temperature distribution; Finally, the combination of ergonomics on human thermal comfort, which utilizes environmental comfort to judge the expected average synesthesia [Predicted Mean Vote (PMV)], does not apply to staff ratio [Percentage of dissatisfied persons (PPD)], relative humidity [Relative Humidity (RH)], the average air age [Mean Age of Air (MAA)] and other evaluation methods, indoor air vehicles quality, air distribution and thermal comfort evaluation.The results accurately simulate the velocity and temperature inside the field of distribution, and thermal comfort inside the train made a science of objective evaluation, thereby improving the thermal comfort of the train cars provide an important frame of reference.