Analysis and Operation of Cooling Water Flows in a Heat Exchangers Network

Lee H; Lee B; Lee IB

Korean Journal of Chemical Engineering, Vol.14, No.4, 257-262, July, 1997

In general, the flow rates of cooling water flowing in a heat exchangers network should be measured for its operational purpose. However, it is difficult to install flow meters on every spot because of the financial and technical reasons. This work presents an explicit algorithm for determining the flow rates of cooling water flowing in the heat exchangers network in the chemical plant. An algorithm is also presented to obtain the desired flow rates of cooling water in each heat exchanger. In order to solve this problem, multivariable optimization techniques will be used to minimize the differences between the desired flow rates and the present cooling water flow rates which flows through the heat exchanger. The commercial computer program GAMS/MINOS which solves the nonlinear optimization problem is used. Numerical examples are presented to illustrate the scope of this work which can be handled with the formulation.

Keywords:Heat Exchangers Network;Cooling Water Flows Analysis;Pipe Network;Newton-Raphson;GAMS;Nonlinear Optimization

[References]

Boulos PF, Wood DJ, J. Hydraulic Eng., 116, 1329 (1990)
Brooke A, Kendrick D, Meeraus A, "GAMS: A User's Guide, Release 2.25," The Scientific Press (1992)
Chansler JM, Rowe DR, Water Eng. Manag., 137, 36 (1990)
Chapra SC, Canale RP, "Numerical Method for Engineers," McGraw-Hill (1988)
Demuren AO, Ideriah JK, J. Hydraulic Eng., 112, 327 (1986)
Hammer, Mark J, "Water and Wastewater Technology," John Wiley & Sons (1986)
Ludwig EE, "Applied Process Design for Chemical and Petrochemical Plants volume 1," Gulf Publishing Co. (1977)
Male JW, Walski TM, "Water Distribution Systems," Lewis (1990)
Mays LW, Tung YK, "Hydrosystems Engineering and Management," McGraw-Hill (1992)
Nielsen HB, J. Hydraulic Eng., 115, 139 (1989)
Ormsbee LE, Wood DJ, J. Hydraulic Eng., 112, 1195 (1986)
Tullis JP, "Hydraulics of Pipelines: Pumps, Valves, Cavitation, Transients," John Wiley & Sons (1989)
Walski TM, Gessler J, Sjostrom JW, "Water Distribution Systems: Simulation and Sizing," Lewis (1990)

[Referenced By]

[1] Boulos PF, Wood DJ, J. Hydraulic Eng., 116, 1329 (1990)

[2] Brooke A, Kendrick D, Meeraus A, "GAMS: A User's Guide, Release 2.25," The Scientific Press (1992)

[3] Chansler JM, Rowe DR, Water Eng. Manag., 137, 36 (1990)

[4] Chapra SC, Canale RP, "Numerical Method for Engineers," McGraw-Hill (1988)

[5] Demuren AO, Ideriah JK, J. Hydraulic Eng., 112, 327 (1986)

[6] Hammer, Mark J, "Water and Wastewater Technology," John Wiley & Sons (1986)

[7] Ludwig EE, "Applied Process Design for Chemical and Petrochemical Plants volume 1," Gulf Publishing Co. (1977)

[8] Male JW, Walski TM, "Water Distribution Systems," Lewis (1990)

[9] Mays LW, Tung YK, "Hydrosystems Engineering and Management," McGraw-Hill (1992)

[10] Nielsen HB, J. Hydraulic Eng., 115, 139 (1989)

[11] Ormsbee LE, Wood DJ, J. Hydraulic Eng., 112, 1195 (1986)

[12] Tullis JP, "Hydraulics of Pipelines: Pumps, Valves, Cavitation, Transients," John Wiley & Sons (1989)

[13] Walski TM, Gessler J, Sjostrom JW, "Water Distribution Systems: Simulation and Sizing," Lewis (1990)