北京市居住建筑节能设计标准DB11/891-2020,将于2021年1月1日正式执行。该标准的针对北京市《居住建筑节能设计标准》DB11/891-2012进行修订,DB11/891-2020将北京居住建筑节能率由75%提升至80%以上,标志着建筑节能向更高水平迈进。
NEIMESUOWEIDEJIANZHUJIENENGLV75%、80%ZHIDESHISHENME?
XIAMIANWOMENYIQIXUEXIYIXIAJIANZHUJIENENGLVDEHANYI。
WOGUOJIANZHUJIENENGSHIYI1980-1981DEJIANZHUNENGHAOWEIJICHU,ANMEIBUZAISHANGYIJIEDUANDEJICHUSHANGTIGAONENGXIAO30%WEIYIGEJIEDUAN。YINCITONGCHANGJUSHUODEDIYIBUJIENENGSHIZAI1980-1981DEJICHUSHANGJIEYUE30%,TONGCHENGWEIJIENENG30%DEBIAOZHUN。DIERBUJIENENGSHIZAIDIYIBUJIENENGDEJICHUSHANGZAIJIEYUE30%,JIJIENENG50%DEBIAOZHUN。DISANBUJIENENGSHIZAIDIERBUJIENENGDEJICHUSHANGZAIJIEYUE30%,JIJIENENG65%DEBIAOZHUN。YICILEITUIDEDAOHOUXUDEJIENENG75%BIAOZHUNHEJIENENG80%BIAOZHUN。
为了快速理解建筑节能率我们做下面的举例,假定1980-1981的建筑能耗是100每一阶段比前一阶段节能约30%。
DIYIJIEDUANJIENENG30% [100-(100-100×30%)]/100=30%
DIERJIEDUANJIENENG50% [100-(70-70×30%)]/100=51%(GUOJIAWEILEZIMIANSHANGGENGRONGYIBIAOSHIZHEIYANGDEZHIBIAO,DINGWEI50DEJIENENGLVBIAOZHUN)
DISANJIEDUANJIENENG65% [100-(50-50×30%)]/100=65%
第四阶段节能75% [100-(35-35×30%)]/100=75%
DIWUJIEDUANJIENENG80% [100-(25-25×30%)]/100=82.5%(TONGYANGWEIZIMIANGENGRONGYIYIJIHOUQIJIENENGQIANLIDERUOHUA,DINGWEI80%DEJIENENGLVBIAOZHUN)
SHANGSHUJIUSHIJIANZHUJIENENGDE5GEJIEDUANDEJIANZHUJIENENGLVDEYOULAI。ZAIDB11/891-2020FABUQIANJINBEIJING、TIANJINJIYANHAIFADASHENGFENZAIJUZHUJIANZHUFANGMIANYIJINGZAIZHIXINGJIENENG75%DEBIAOZHUN。ERGUONEIDABUFENSHENGFENRENGZAISHIYONGJIENENG65%DEBIAOZHUN,ERBEIJINGSHISHIDB11/891-2020BIAOZHUN JIANZHUJIENENGLV80%DEBIAOZHUNHUIGENGYOULIDEYINDAOQUANGUOJIANZHUJIENENGDEKUAISUFAZHANHETONGYI。
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