2019 Volume 36 Issue 4 Pages 339-
We proposed erythritol slurry, which is mixture of the erythritol solution and erythritol crystal, as a heat medium for the utilization of unused heat at medium/low temperature. The influence of flow pattern and solid fraction on the flow characteristics were investigated experimentally. In the experiment, erythritol slurry was flowed through a horizontal stainless steel tube and the pressure drop was measured. Although a power-law equation was used to describe the flow characteristics of the slurry, the cause of the difference between the pipe friction coefficient and the theoretical value cannot be clarified. Also, a new model, the sedimentary layer of the solid crystals considered, was applied in the laminar flow. As a result, the difference between the pipe friction coefficient and the theoretical value became smaller. It suggested that the influence of the flow pattern on the flow characteristics of the slurry is not negligible, and it was found that the evaluation of the flow characteristics using a model, the sedimentary layer considered, was effective.
