טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
M.Sc Thesis
M.Sc StudentMeckler Pnina
SubjectInvestigating the Use of MEXEL 432 to Prevent the
Development of Biofouling in Water Cooling System,
at the Haifa Power Station
DepartmentDepartment of Civil and Environmental Engineering
Supervisor Professor Emeritus Nava Narkis


Abstract

In the power stations operated by the I.E.C. - the Israel Electric Corporation, hot treated water flows are mainly cooled by sea water. The sea water, enters the generation unit through inlet ducts, cools the treated water via heat exchangers, and then flows back to the sea. For economic reasons, the cooling water is treated minimally, and contaminants like sand, suspended and dissolved solids and larvae of marine organisms enter the system with the sea water flow. These contaminants cause scaling and marine growth, called biofouling. The scaling and biofouling degrade the heat exchange process, reduce the fluid flow rates, and cause metal corrosion, thereby impacting on the facility’s reliability.

An experiment to check the additive MEXEL 432/0 efficiency

The goal of the experiment was to determine the additive’s efficiency in a small cooling water system, and to consider whether a second stage experiment would be necessary, in which the additive’s efficiency would be tested in a large sea water cooling system, 100 times larger.

The additive’s active matter is aliphatic amine.

The experiment took place in Haifa Power Station during summer 2003. The results of the experiment show, that the additive MEXEL 432/0 is not poisonous at the terms used in the experiment. Better results were achieved when the treatment is carried out, on a clean system. The additive helped the heat exchanger to operate efficiently throughout the experiment period.

The good results achieved in this experiment, will lead to a second experiment, on a larger scale in which the MEXEL 432/0 efficiency will be determined according to several tests.