Abstract
The National Power Corporation (NAPOCOR) of the Philippines spends millions of pesos annually for treatment of cooling water and preventive maintenance work to ensure the efficient operation of its geothermal power plants supplied by liquid-dominated reservoirs. Therefore, NAPOCOR deemed it worthwhile to look for cheaper water treatment alternatives for the benefit not only of the geothermal power plants, but the whole country as well, in terms of lower power generation costs and improved plant operation. The results of tests on the use of lime in the cooling water of NAPOCOR geothermal power plants are presented in this paper. Initial results show substantial savings in water treatment costs and a significant decrease in corrosion rates on metal parts and equipment.
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