管式换热器中的单相流体强化传热技术  

Heat transfer enhancement techniques for single-phase fluid tubular heat exchangers

作　　者：林宗虎[1,2] 

机构地区：[1]中国工程院 [2]西安交通大学多相流国家重点实验室,西安710049

出　　处：《自然杂志》2013年第5期313-319,共7页Chinese Journal of Nature

摘　　要：随着工业迅速发展,由于增大设备容量可以减少投资和运行费用,各种工业均大力发展大容量设备,从而使配备在工业中的换热器体积和重量也相应增大。如何应用科学创新方法减小大型换热器的体积和重量已成为工业发展的关键技术。此外,在发展新能源、海水淡化,以及余热利用和节能设备中,由于冷热温差低、换热器尺寸大,也急需研制尺寸小、效能高的新型换热器。发展和应用强化传热技术,亦即采用可以增加单位传热面积传热量的技术就可有效地解决这一问题。论述了强化传热技术对发展国民经济和新能源等的重要意义,以及其发展途径和效益评价方法。此外,还论述了在单相流体管式换热器中的强化传热技术。As the fast development of industries, on account of large capacity apparatus may reduce the capital and operation cost, different industries endeavor to develope large capacity apparatus. Thus, the volumes and weights of heat exchangers belong to these industries may increase accordingly. How to decrease the volumes and weights of these large heat exchangers by scientific creative methods became key techniques for industries development. Besides, in the case of developing new energy, desalination of sea water, waste heat utilization and energy saving apparatus, on account of the low temperature difference between the cold and hot medium, heat exchanger of these regions are quite large. Therefore developing small and high efficient new heat exchangers are also urgently needed. This problem can be sloved using heat transfer enhancement techniques. In this paper, the important meanings of heat transfer enhancement techniques are described. Besides, developing ways, methods for reviewing its efficiency, and heat transfer enhancement techniques for single-phase tubular heat exchangers are also mentioned.

关 键 词：管式换热器 单相流体 强化传热 

分 类 号：TK172[动力工程及工程热物理—热能工程]