Electrohydrodynamically Enhanced Heat Transfer in Pool Boiling

摘要: The electrohydrodynamically enhanced heat transfer in pool boiling the nucleate regime was studied using R-123 as working fluid. An experimental apparatus designed and built which allowed accurate measurements. evaporator consisted of an electrically heated single horizontal smooth tube. Several different electrode designs were investigated. This study included higher fluxes than most those previously reported literature. A summary previous work is provided. results indicated that coefficient at a flux 1.6 kW/m{sup 2} voltage 10 kV 4.6 times without electric field presence. However, 52 improved only by 38%. These enhancements are significant even large levels. power consumption for establishing fields on order 0.1% evaporator. When fluid contaminated with few percent ethanol, 3.3 increased factor 12.6 15 compared to zero kV. Finally, presence nearly eliminated hysteresis effect.