热网集中质调节,网路供、 回水温度曲线见图1 1 -6。℃(指采暖部分) , 此时701\uf074 \uf0b31 1五 供热工程第章第节图11-5 闭式并联热水系统示意图图 11-5 闭式并联热水供热系统示意图1 1五 供热工程第章第节图11-6(a) 并联闭式热水供热系统供热综合调节水温曲线示意图;(b) 各热用户和网路总水流量图1 1五 供热工程第章第节热水用户系统的调节(最不利工况是采暖初期)(11-51)wt下热平衡得:对于采暖期(1rQ \uf03d\uf074\uf074\uf0a2\uf0a2\uf02dt\uf044\uf044) , 在某一12\uf0a2\uf0a221ryi r\uf0b7rrrQG\uf074\uf074\uf0b7\uf0b7\uf02d\uf03d\uf03d(11-52)1\uf0a2\uf0a21rrQKt\uf03d\uf03d(11-53)0.5yi r\uf0b7KG\uf03d(11-54)1\uf0a2\uf0a22\uf0a2\uf0a2121ryi r\uf0b7rrQG\uf074\uf074\uf074\uf074\uf02d\uf0b7\uf0b7\uf02d\uf03d\uf03d1 1五 供热工程第章第节整理方程如下:(11-55)1\uf0a2\uf0a22\uf0a2\uf0a2121ryi r\uf0b7rG\uf074\uf074\uf074\uf074\uf02d\uf0b7\uf0b7\uf02d\uf0b7\uf03d0.5yi r\uf0b712\uf02d12(\uf074)(\uf074)1lnrrtlrr\uf0a2\uf0a2rlttGtt\uf074\uf074\uf074\uf0b7为未知数, 通过试算和迭代可以确定。\uf0b7\uf0b7\uf02d\uf02d\uf02d\uf0b7\uf03d\uf044\uf02d(11-56)在上两式中,yi r\uf0b7 和G2 r1 1五 供热工程第章第节1. 对通风用户系统同理可联立:21\uf0a2\uf0a2\uf0a22\uf0a2\uf0a2\uf0a21tt\uf074\uf074\uf03d\uf074\uf02b\uf074\uf02d\uf0b7\uf0b7℃(11-61)1\uf0a2\uf0a2\uf0a2\uf02d2\uf0a2\uf0a2\uf0a2\uf02d11\uf0a2\uf0a2\uf0a22\uf0a2\uf0a2\uf0a22\uf074tttG\uf074\uf074\uf02d\uf074\uf074\uf0b7\uf0b7\uf03d(11-62)