Research on the Influence of Fresh Air on Indoor Air Distribution and Energy Consumption in Heating Room
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Insufficient fresh air is a common problem in heating rooms, but the supply of cold fresh air not only affects the indoor temperature and flow field, but also causes thermal discomfort and increases energy consumption. The coupling effects of ventilation rate nk on air distribution, heating energy consumption, and thermal environment need deep investigation and research. Taking a heating room as an example, the changes in air distribution and heating energy consumption under different ventilation rates nk are studied in this paper, and the energy-saving ratio, temperature distribution, velocity distribution, and the indoor thermal comfort were analyzed under different operating conditions. The results show that the energy-saving ratio is 9.29% when nk equals 0.5 h−1, and the energy-saving ratio can reach 25.77% when nk rises to 2.0 h−1, but the increase in nk affects the indoor thermal comfort as well. Therefore, the optimal control range of nk is proposed no more than 1.0 h−1. The results can provide a reference for heating engineering applications.
KeywordsFresh air Ventilation rate Air distribution Energy-saving ratio Thermal comfort
This work was supported by the National Key Research and Development Program (2016YFC00400) and the National Natural Science Foundation of China (No. 51778382).
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