Diseño de una formulación de refrigerantes para motores a gasolina y diésel aplicando técnicas de diseño experimental

Abstract

This work is to design a gasoline and diesel engines coolants formulation, through the application of experimental design techniques. The CTC service company demands a coolant that can be efficient to the climatic conditions of our region, and also to be environmental friendly. For this purpose, the author has reduced the percentage of refrigerant base, and use organic acid technology inhibitors which possess a better performance and easily degraded after the end of the product life. To accomplish these objectives work has been developed according to ASTM international standards considering physical and chemical recommendations for coolants. Also the specifications of raw materials and experimental tests were considered. A single factor was used in the experimental design during the formulation. The independent factor was the proportion of cooling base and dependent factors were, the boiling point, foaming tendency, and pH. The proportion of coolant base was worked with 5 levels (1%, 5%, 15%, 25% and 40%); and two replications of the test were done. After reaching the results and performing the analysis, it was determined that the percentage of cooling base has a great influence on the boiling point and pH, and a medium influence on foam formation tendency. Likewise, the best refrigerants obtained were selected for light duty or gasoline engines, and for heavy duty or diesel engines.