冬季单侧喷口加二次气流下热环境的节能性和舒适性讨论

Discussion on Energy-saving and Thermal Comfort of Stratified Air Conditioning with Secondary Air Flow in Winter

采用数值模拟的方法研究了单侧喷口送风的分层空调和单侧喷口加二次气流的改进型分层空调2种气流组织,对冬季室内的垂直温度分布、居住域温度场、速度场以及热负荷等进行了分析,据此讨论了冬季室内的热舒适性和节能性。经过与试验进行对比验证后,数值模拟拓展模拟研究表明:对于单侧喷口送风有、无二次气流2种分层空调形式,在送风量和送风温度以及边界条件均相同的情况下,室内居住域的温度分别为21.9℃和21.1℃,以前者同样的居住域温度为条件,计算两者空调供热负荷,得到前者节能率为12.5%。同时以两者居住域的ADPI作为舒适性评价依据,研究分析得到两者分别为48.5%和22.7%,前者较好,即对于本文研究对象而言,单侧喷口加二次气流的改进型分层空调具有一定的节能效果且提高了室内热环境的舒适性。

Stratified air conditioning with and without secondary air flow were studied using numerical simulation method,and analysis of indoor vertical temperature,temperature and velocity field in occupied zone,heating load and so on in winter were made,and discussion on energy-saving and thermal comfort were carried out.Verified with experiment data,the simulative results showed that： under stratified air conditioning with and without secondary air flow,when air volume,supplying temperature and boundary remained the same,average temperature in occupied zone could reach 21.9℃ and 21.1℃ respectively.Based on reaching the same average temperature in occupied zone,air-conditioning heating load was calculated and the energy-saving rate of the former is 12.5%.Meanwhile,APDI was used as the thermal comfort indicator of occupied zone.Under the two air-flow distributions,ADPI are 48.5%and 22.7% respectively,the former of which was better.Above all,stratification air-conditioning with secondary air flow was consequently more energy-saving,and with much better thermal comfort.