3、实际流量及t2 求管路特性曲线与泵特性曲线交点: 实=39m3/h 0aαK 0.8 0.8 39 a!=3021 35 3294v/m2K 35 =160lw/m2K 1250.002525 +0.0001+-7 3249204522.5 1.2×10 39×1000 ×4×10°(t2-20)=1601×(x×0.025×2×90)×△ 3600 =65.970C3、实际流量及 t’2 求管路特性曲线与泵特性曲线交点: ( ) ( ) ( ) 3 0.8 0.8 2 ' 2 4 3 2 39 / 39 39 3021 3294 / 35 35 1 1601 / 1 25 0.0025 25 1 0.0001 3249 20 45 22.5 1.2 10 39 1000 4 10 20 1601 0.025 2 90 3600 i i i m Q m h w m K K w m K Q t t = = = = = = + + + = − = 实 0 t C 2 = 65.97