P2+>h z1+)+=822p In the equation Z1=h Z,=0 ll, 0 0 P1=P2 ∑h=20n2 substitute the above values into formula, we have 9.8h=202 u=07√h Put formula b into formula a 07h0.0320.7h integration range as follows h1=2m 、= h, db=-5580/=1dh =-5502lVh2-h] =5580×2(2-√)=4632s=1284h 15. A cooling cycle system of brine is shown in the figure. The density of the brine is 1100kg/m, and the circulation is 36m/h The diameter of the pipeline is the same. The loss from A and two heat exchangers to B is 98. 1J/kg, the loss from B TO A is 49J/kg Try to calculate 1) If the efficiency of the pump is 70%, what is the shaft power of it?(in kw) 2) If the reading of the gauge in position A is 2. 5kgf/cm, what is the reading of the+ + = + + +hf u p gZ u p gZ   2 2 2 2 1 2 1 1 2 2 In the equation Z1 = h Z2 = 0  = =  = 2 1 2 1 2 20 0 0 h u p p u u f substitute the above values into formula，we have 9.81h=20 2 u u = 0.7 h Put formula b into formula a， h dh h dh d D d 0.7 ) 0.032 2 ( 0.7 ( ) 2 2 0  = − = − =―5580 h dh integration range as flollows    = = 2 1 0 h m h m 1 2 2 1 = =   = = = = = − 1 0 2 2 1 2 1 5580 h h h dh d     θ=―5580×2 1 2 1 2 2 1 [ ] = − = h h h h =5580×2 ( 2 − 1) = 4632s = 1.284h 15． A cooling cycle system of brine is shown in the figure. The density of the brine is 1100kg/m³,and the circulation is 36m³/h.The diameter of the pipeline is the same. The energy loss from A and two heat exchangers to B is 98.1J/kg,the loss from B TO A is 49J/kg.Try to calculate: 1) If the efficiency of the pump is 70%, what is the shaft power of it?(in kw) 2) If the reading of the gauge in position A is 2.5kgf/cm²,what is the reading of the