2007 Volume 56 Issue 4 Pages 165-169
After long term usage, troubles have been experienced recently such as lowering operation efficiency by plugging of spray nozzles with corrosion products in absorption refrigerator. To solve these problems, removal techniques of plugging by chemical cleaning have been investigated. The following conclusions were obtained:
(1) Chemical cleaning solution of HCl with L-ascorbic acid was developed well designed to have high removal performance on Fe oxide deposit without any damage on copper tubes.
(2) Applying the developed chemical cleaning solution to operating absorption refrigerator, it was proved that the plugging of spray nozzle by oxides was removed giving good operation efficiencies up to 85% from lower lebels of 30 %.
(3) It was also clarified that no damages were observed on copper tubes with the developed chemical cleaning solution.