In order to meet the future energy demands many interesting techniques have been reported in literature for improving boiling heat transfer using nanoparticles and nano-structured surfaces. The mode of heat transfer and efficiency of water cooled reactors, direct steam generators can be substantially modified by this new technology. Boiling heat transfer is an area of increasing interest in many engineered heat transfer and cooling applications. Nucleate boiling is the efficient heat transfer region in pool boiling. The critical heat flux changes boiling mechanism from efficient mode to inefficient mode by forming a vapor film over the heater surface that leads to boiling crisis. The actual mechanism that creates this boiling crisis still remains a grey area. The CHF parameter cannot be avoided in boiling heat transfer applications; instead it can be postponed by adopting fluid and surface modification techniques. This review analyzes the present status of nano-modification for enhancing the pool boiling and critically compares the experimental results with the theoretical predictions. The existing theoretical models are not satisfactorily explaining the experimental investigations. New investigation techniques and better correlation between the modified surface properties to the heat flux is inevitable for further improvement.

为了满足未来的能源需求，文献中已经报道了许多有趣的技术，这些技术使用纳米颗粒和纳米结构表面来改善沸腾传热。水冷反应堆，直接蒸汽发生器的传热方式和效率可以通过这项新技术进行实质性的修改。在许多工程传热和冷却应用中，沸腾传热是一个越来越引起人们关注的领域。核沸腾是池沸腾中有效的传热区域。临界热通量通过在加热器表面上形成蒸气膜而导致沸腾危机，从而将沸腾机制从有效模式改变为无效模式。造成这种沸腾危机的实际机制仍然是一个灰色地带。CHF参数在沸腾传热应用中不可避免。相反，可以通过采用流体和表面改性技术来推迟它。这篇评论分析了纳米改性的现状，以提高池沸腾，并严格地将实验结果与理论预测进行比较。现有的理论模型不能令人满意地解释实验研究。为了进一步的改进，不可避免地需要新的研究技术以及改性后的表面性质与热通量之间的更好的相关性。