第三章空气处理过程分析计算.docx
1一新风处理状态点M-风机盘管处理状态点第三章空气处理过程分析计算3.1空气处理状态点的确定根据凝智楼的建筑特点，末端空气处理过程采用风机盘管+独立新风系统的形式。新风由新风机组处理到室内空气蛤值，并直接送入室内，即新风与风机盘管并联送风。空气处理过程在蛤湿图上的表示如下图，此处忽略风机温升对空调过程的影响。图37夏季工况空气处理蛤湿图新风机组将室外新风W处理到与室内空气等蛤点1,风机盘管将回风从N点处理到M点然后与1状态的新风在室内大空间混合，达到送风状态点0,再沿热湿比线达到房间状态点N。冷却去湿新风机组混合冷却去湿A八N风机盘管0N该空调方案的设计和计算过程如下：1）根据室内外设计参数确定W点和N点。2）确定新风处理后的状态点1室内控制状态点N的等始线与（P=90%95%的等相对湿度线的交点即为新风处理后的终状态点1。3）确定送风状态点O因为风机盘管加新风系统大多用于舒适性空调，一般不受送风温差的限制，可用最大送风温差送风，故已5=90%95%为确定O点的条件之一。过N点作线与（P=90%95%等相对湿度线相交，交点即为送风状态点Oo4）计算房间总送风量qm=（kgs）hN-0式中：Q一室内总冷负荷，kW；hN室内空气蛤值，kJ/kg；h0送风状态点蛤值，kJkgo5）计算风机盘管处理风量QmF=Qmqw）（kgs）式中：qm-房间总送风量，kg/s；qmW房间新风量，kg/So6）确定风机盘管处理后的空气状态点M的蛤值m-%-M-h0）（kjkg）式中：h0送风状态点蛤值，kJ/kg;qmW房间新风量，kg/s；qmF风机盘管处理风量，kg/s；h1新风机组处理后空气的始值，kJkgo7）计算风机盘管处理室内循环空气所需冷量Qf=QmF（hN-hM）kW式中：qmF一风机盘管处理风量，kg/s;hN室内空气蛤值，kJ/kg;hM风机盘管处理后的空气状态点M的蛤值，kJkgo8）计算新风机处理室外空气所需冷量Qw=qmw1w-h1）kW式中：qmw房间新风量，kg/s;hw室外空气蛤值，kJ/kg；h1新风机组处理后空气的始值，kJkgo3.2送风量的计算以302（校办公室）为例已知该房间的冷负荷为Q=1622W,新风量取总风量的10%,在始湿图上作N点等蛤线与95%的相对湿度线的交点即为1,查的1的始值为58kJ/kg;房间的热湿比取无穷大，过N点作热湿比线与95%的相对湿度线交于0点，查的。点蛤值为48.5kJkg,根据。点参数求出总送风量。总送风量：qm=:-=M=615kg/hpq-q5o4o.5新风量：qmw=qm*10%=615×0.1=62kg/h风机盘管处理风量：QmF=(Qm-Qmw)=615-62=553kg/h风机盘管处理后的空气状态点M的蛤值：m=h0-(h1-h0)二48.5嘿(58-48.5)kJ/kg=47.4kJ/kg风机盘管处理室内循环空气所需冷量：Qf-QmF(hN-m)=-(58-47.4)kW3600=1.63kW新风机处理室外空气所需冷量：Qw=qw（hw-h。二卫（93-58）kW3600二0.603kW其它各房间的计算方法与此相同，计算结果见下表。表37各空调房间综合参数表一楼各房间计算汇总表房间编号冷负荷(kw)房间人数新风量(Kgh)息风量(Kgh)风机盘管处理风量(Kgh)风机会管出口状态M的蛤值(KJKg)风机盘管处理回风所需冷量(Kw)新风机处理新风所需冷量(Kw)IO11.9828181072951.221.980.721021.76327272164951.221.7630.641031.76327272164951.221.7630.641041.76327272164951.221.7630.641051.76327272164951.221.7630.641063.6521491493134451.223.6511.3241071.76327272164951.221.7630.641081.76327272164951.221.7630.641092.128685977351.222.10.764I112.41229998788851.222.4120.881122.13828887578751.222.1380.7821132.13828887578751.222.1380.7821142.13828887578751.222.1380.7821152.13828887578751.222.1380.7821162.13828887578751.222.1380.7821172.5632105104994451.222.5650.9331182.13228787278551.222.1330.7731192.13228787278551.222.1330.7731202.13228787278551.222.1330.773二楼各房间计算汇总表房间编号冷负荷(kw)房间人数新风量(Kgh)总风量(Kgh)风机盘管处理风量(KgZh)风机盘管出口状态M的值(KJKg)风机盘管处理回风所需冷量(Kw)新风机处理新风所需冷量(Kw)2021.62226066360351.31.60.532031.62226066360351.31.60.532041.62226066360351.31.60.532051.62226066360351.31.60.532061.62226066360351.31.60.532073.35841201253125351.43.3411.062081.62226066360351.31.6000.532091.93226079073051.51.9260.532112.31226087681647.82.30.582125.752602160210048.15.80.582131.96726075869847.720.582141.96726075869847.720.582152.35826089383347.82.50.582161.96726080474451.51.960.5332171.96726080474451.51.960.5332181.96726080474451.51.960.5332192.35826096490451.62.410.5332202.31226094688651.62.360.533三楼各房间计算汇总表房间编号冷负荷(kw)房间人数新风量(Kgh)总风量(Kgh)风机盘管处理风量(KgZh)风机盘管出口状态M的值(KJKg)风机盘管处理回风所需冷量(Kw)新风机处理新风所需冷量(Kw)3021.62226261555347.41.630.6033031.62226261555347.41.630.6033041.62226261555347.41.630.6033063.35815450120975939.13354.753073.35815450120975939.13.354.753081.93227979071151.21.940.7023111.96717574567047.41.970.733124.09411551551139647.44.111.513131.96717574567047.41.970.733141.96717574567047.41.970.733152.35818989480547.52.60.93161.96717574567047.52.20.73171.96717574567047.52.20.73181.96727574567047.52.20.73192.35828989480547.52.20.93202.31219594785251.3230.8四楼各房间计算汇总表房间编号冷负荷(kw)房间人数新风量(Kgh)息风量(Kgh)风机盘管处理风量(Kgh)风机玄管出口状态M的蛤值(KJKg)风机盘管处理回风所需冷量(Kw)新风机处理新风所需冷量(Kw)40139.40230141814184127664728.3714.984021.90427877970151.221.940.6934031.90427877970151.221.940.6934041.90427877970151.221.940.6934051.90427877970151.221.940.6934061.90427877970151.221.940.6934072.26826092886751.62.310.5334092.7142601116105651.72.7280.53410
