建筑热湿环境综述模版课件.ppt

1、12345对流换热对流换热(对流质交换对流质交换)辐射辐射导热导热(水蒸汽渗透水蒸汽渗透)6780.8可见光可见光近红外线近红外线长波红外线长波红外线普通玻璃的光谱透射率普通玻璃的光谱透射率91011(1-r)ao1r(1-r)A(1-r)(1-ao)(1-r)(1-ao)r(1-r)2(1-ao)(1-r)(1-ao)2 r(1-r)2(1-ao)2 rBC(1-r)(1-ao)4 r3(1-r)2(1-ao)4 r3(1-ao)4(1-r)r4(1-r)(1-ao)3 r3ao(1-r)(1-ao)2 r2(1-r)(1-ao)3r2(1-r)2(1-ao)3r2(1-r)(1-ao)3r

2、3DE(1-r)(1-ao)2 r2ao(1-r)(1-ao)r ao)exp(10KLa 12131415outLoutairzQaItt outairzaItt 1617)(444gggskyskywggskywLTxTxTxxQ 18192021xtxxaxtxat )()(22 0,|)(),0()(xoutlwsoloutaoutxtxQQtt xshwjimjijijinainxtxQTTxtt|)()()()(),(441,22x=0 x=Qenv0|)(),0()(xzoutxtxtt xcondwallxtxQ|)(,232425 xcondwallxtxQ|)(,26272

3、829 mjinajjrinshwxcondwallwallwallttttQxtxQHGQ1,2,22,)()(),(),(|)()(3031)(,windwind,inaoutacondwindttFKHG 32333435363738反射反射对流对流透过透过对流对流透过透过反射反射39hfloor n pw2ndpw1ohstory n dinternal cavityblindsexternal cavityfloor double glassoutside single glass404142长波长波辐射辐射导热和导热和自然对自然对流换热流换热长波辐射长波辐射室内表面室内表面对玻璃的

4、对玻璃的长波辐射长波辐射43difglassdifDiglassDiglassIIHG,)(,difdifDiDiinoutoutaglassaIaIRRRHG 44windwindnsdifsDisolwindFXCCSSGXSSGHG)(,45windglassnsdifsDiinoutawindsolwindcondwindwindFXCCSSGXSSGttKHGHGHG)()()()()()()(,4647 outaviiinvK 111148饱和水蒸汽分压力饱和水蒸汽分压力温度温度实际水蒸汽分压力实际水蒸汽分压力49505152535455565758蓄热量需除去的蓄热量实际冷负荷照

5、明得热量热量瞬时得热量瞬时冷负荷需除去的蓄热量蓄热量596061626364twalliltwindtwallHradconvsclQHGHGHGHGHEHEQ inf,65niNjinajsfxijriinttrnsolwindtshwHtwallttttHGHGQ)(|1,2,2*,窗太阳透过窗太阳透过热源短波辐射热源短波辐射室内辐射导致室内辐射导致墙体温升墙体温升内表面间长波内表面间长波辐射项辐射项66asclatwalliltwindowtwallHQQQQHGHGHGHGHE ,inf niicondwalliltwindHLilLHtwalltwallSiltwindSHLSLcl

6、sclclQHGHGHGHGHGQHGHGHGHGHGHGQQQ,inf,inf,inf,67xtxxaxtxat )()(22)(),(|),(|),(,xfxtxtQQttxtttxshwlwinainxoutaout 000 )()(441 jimjijijlwTTxQ 68当量温差法谐波反应法谐波分解法冷负荷系数法冷负荷温差法反应系数法负荷计算法1946.USA1950s.USSR1967.Canada697071-15-10-505101520253035024681012141618202224夏季室内控制温度夏季室外气温冬季室内控制温度冬季室外气温温度()夏季t冬季t时间2626

7、1828.628.69727374G(s)Input(s)Output(s)系统系统Input()Output()()()()()(00sIsOdeIdeOsGss 75767778-5-55 515152525353545450 0144014402880288043204320576057607200720086408640温度()温度()时间时间(h)79-5-55 515152525353545450 014401440 28802880 43204320 57605760 72007200 8640864016.9-200200144028804320576072008640-7.507.5050100150808182 00.20.40.60.81123456789 10 11 12 13时间(时)热量比例得热负荷8300.10.20.30.40.50.60.70.80.912345678910111213时间(时)负荷8400.10.20.30.40.50.60.70.80.9113579111315171921时间(时)负荷85868788899091929394959697BuATTC 98