Indoor environment test in large space of Terminal T2 and T3 at Xi’an Xianyang International Airport

Terminal T2 adopts all-air air conditioning system with nozzle outlets, while T3 adopts radiant floor with displacement ventilation and liquid desiccant outdoor air handling units. Presents the indoor environment tests in winter and summer for the two terminals in detail. The results show a basically identical temperature and humidity distribution in the space lower than 5 meters for nozzle outlets in summer, while for radiant floor with displacement ventilation temperature and humidity values are smaller in space lower than 2 meters, and temperature and humidity increase rapidly with the increase of height for the space higher than 2 meters. The results also show that the temperature difference is as large as a range of 14～16 ℃ in space 0.1meters higher and 4 meters lower above the floor for nozzle outlets in winter, while the temperature difference along vertical direction is smaller than 1.0 ℃ for radiant floor scheme. The operative temperature of radiant floor scheme is lower, the indoor environment is more comfortable, and the energy consumption is apparently less than nozzle outlet scheme.