Discussion on Indoor Design Parameters of Air-Conditioning in the Large Space Building with Considering Comfort and Energy Consumption Based on Nomograms

Abstract

Nowadays, the trade-off among comfort, health, and energy consumption in deciding indoor design parameters of air-conditioning becomes more and more concerned. In the large space buildings with stratified air-conditioning, human comfort is different from common buildings, and each wall temperature is usually different. Thus, the settings of indoor design parameter for air-conditioning in these buildings are different from common building. In this paper, we provided a series of figures where design temperature and humidity were determined on the difference of black globe temperature and air temperature under certain PMV conditions. Because the fresh air volume is one of the healthy indicators for indoor air environment, we provided a nomogram which can be used to determine the fresh air volume with considering the indoor and outdoor environment, situation of room staff activities, occupant density, and building characteristics. Furthermore, the larger the fresh air volume, the better the indoor air quality, but the larger the energy consumption. We also showed a nomogram that can be used to determine the energy consumption of fresh air and the PMV value under certain design temperature and humidity.