Abstract
This paper has dealt with the viscous characteristics of ethylene glycol (EG) solution with flow drag reduction additive. In this study, oleyldihydoroxyetylamineoxide (ODEAO) was used as the flow drag reduction additive, and aqueous solution of EG was used as a secondary refrigerant. The viscosity of EG solution with ODEAO was measured with a rotary rheometer. The experimental pa-rameters of viscosity measurement were temperature of the ODEAO brine, the ODEAO concentra-tion and the EG concentration. From the experimental results, the apparent viscosity of EG solution with ODEAO showed SIS (= the shear induced state). Therefore, the non-linear dependence of shear stress on shear rate was well approximated by the Power-law model under the high shear condition, and pseudoplastic viscosity and index number in each experimental parameter were estimated. And the non-dimensional analysis for flow drag and heat transfer reduction effect of EG solution with ODEAO has been investigated by using this approximation.
