不同海区相近纬度海陆建筑供冷度日数差异性探讨

Discussion on difference of cooling degree days between island and inland buildings at similar latitude in different sea areas

选取我国自北向南5个海岛城市及与其相近纬度的内陆城市形成海陆对比组,对比分析了各海陆对比组城市供冷度日数CDD26相对大小的差异性,并探索了产生差异性的原因。结果表明:北海区及东海区海岛城市CDD26小于其内陆对照城市,而南海区则相反;海陆对比组城市CDD26的差异性主要是由海陆下垫面性质的不同造成的;不同海区相近纬度海陆对比组城市CDD26相对大小的差异性与当地年平均温度、日平均温度高于26℃的天数分布范围及海洋蓄散热等因素密切相关;若在满足室内舒适性条件下提高室内计算温度,南部海陆城市的节能效果显著优于北部。

Selects island and inland cities at similar latitude to form five sea-land comparison groups from north to south, analyses the difference of cooling degree days(CDD26) relative size among the sea-land comparison groups, and seeks the reason for the difference. The results indicate that the CDD26 of island cities in northern and eastern sea areas is less than that of inland comparison cities, and it is opposite for southern sea area. The CDD26 distinction between island and inland cities is mainly caused by different underlying surface property. The difference of CDD26 relative size between island and inland cities in different sea areas is closely related to annual mean temperature, distribution range of daily average temperature above 26 ℃ and marine heat storage. If the indoor design temperature is increased under the condition of satisfying indoor comfort, the energy saving effect for island and inland cities in the south would be significantly better than that in the north.