hardy cross
DESCRIPTION
Jaringan perpipaanTRANSCRIPT
HARDY CROSS METHOD
Condition :
β’ Friction Law In the Pipe
βπ = π.πΏ
π·
π2
2π= π.πΏ
π·
π2
2ππ΄2=8ππΏ
ππ2π·5π2
βπ = π. π2
β’ Contnuity Law
ππ = 0
β’ Energy loss βπ = 0
STEPS
1. Select discharge distribution through pipe (Q0) using continuity law.
2. Calculate fricton loss each pipe using βπ = π. π2
3. Devide pipe network become several closed network, each pipe should exist at minimum in the one closed network.
4. Calculate total of friction loss at each closed network. βπ = 0 5. Calculate value 2ππ for each network
6. Calculate discharge correction, βπ = πππ2
2πππ
7. Corrected the discharge to balance energy loss in the network, π = π0 + βπ
8. Repeat step 1 to 6 until βπ β 0
EXAMPLE
Closed networks
1st Iteration
1st closed network
2nd closed network
Discharge Correction
2nd Iterations
1st closed network
2nd closed network
3rd Iterations
1st closed network
2nd closed network
Result