STUDIES ON HEAT-TRANSFER CHARACTERISTICS OF DIFFERENT SERIES OF ALKOXYSILANES

Heat transfer coefficient of tetraalkoxysilanes, dimethyldialkoxysilan es, polydimethylsiloxanes and coolanols of Monsanto Chemicals has been calculated from Dittus-Boelter equation, Reynold's number, Prandtl nu mber, friction factor, pressure drop are calculated and reported. Heat transfer coefficient of some of the samples of tetraalkoxysilanes and dimethyldialkoxysilanes are experimentally verified using double pipe heat exchanger. Among the series of alkoxysilanes studied, dimethylal koxysilanes possess higher heat transfer coefficients than tetraalkoxy silanes arid comparable with that of conventional heat transfer materi als. Heat transfer coefficients of different series of alkoxysilanes a re compared against molecular weight, thermal conductivity and specifi c heat. Heat transfer coefficient for all the series of compounds decr eases with increase of molecular weight, thermal conductivity and spec ific heat.