REU Supplement: Small Grants for Exploratory Research: EHDHeat Transfer Augmentation of Environmentally Safe Refrigerants

过去十年的研究结果清楚地表明， 电流体动力传热技术的潜力 增加具有低电导率的有机介质。 许多新确定的制冷剂传热性能较差 特性，但似乎具有足够低的电 电导率，以符合EHD增强。 探索性 实验研究的努力，提出了调查 EHD强化传热有效性/适用性 三种环境可接受的（臭氧安全）制冷剂。 的 选择的制冷剂是R-22、R-123和R-134 a， 被认为最有可能代表未来非共沸的核心 家用/商用空调和供暖用工质 泵送系统 EHD沸腾传热的潜力 这些制冷剂的增加将作为一个函数进行研究 电场参数（施加电压和电极 几何形状/取向）和传热表面特性 （平滑和增强配置）。 如果这一结果 初步调查是令人鼓舞的，更全面的未来 将提交一项提案，以便系统地研究这一问题 可以进行实验和分析。

Results of research in the past decade clearly suggest an excellent potential for electrohydrodynamic (EHD) technique in heat transfer augmentation of organic media with low-electrical conductivity. Many of the newly identified refrigerants have poor heat transfer characteristics, but appear to have a low enough electrical conductivity to qualify for the EHD enhancement. An exploratory experimental research effort is proposed to investigate the effectiveness/applicability of EHD heat transfer augmentation of three environmentally acceptable (Ozone-safe) refrigerants. The selected refrigerants are R-22, R-123 and R-134a, which are believed to most likely represent the core of future non-azeotropic working fluids for residential/commercial air conditioning and heat pumping systems. The potential of EHD boiling heat transfer augmentation of these refrigerants will be studied as a function of electric field parameters (applied voltage and electrode geometry/orientation) and heat transfer surface characteristics (smooth and enhanced configurations). Should results of this initial investigation be encouraging, a more comprehensive future proposal will be submitted whereby systematic study of the problem both experimentally and analytically can be conducted.