文档介绍：点波板式换热器流动换热特性研究

魏文建李华

(丹佛斯板式换热器中国研发中心,杭州,310018)

摘要介绍了丹佛斯(杭州)板式换热器有限公司提出并开发的点波板式换热器。分别通过单相水-水
换热测试和制冷剂(R410A)-水蒸发换热测试,实验研究了点波板式换热器与传统人字波板式换热器的传
热及流动性能。结果表明,新型点波钎焊板式换热器,作为单相换热装置,具有较好的传热和流动性能。
与传统的人字波板式换热器相比,较大雷诺数下,强化传热 20%以上,沿程阻力因子降低为传统结构的 1/4
左右。同时,作为蒸发器,在相似的制冷剂流动特征下,点波板式换热器比人字波板式换热器具有更好的
流动和传热性能,这些性能优势,随着制冷剂流动特征的加强将变得更为明显。
关键词板式换热器换热压降点波

Characteristics of heat transfer and pressure drop of dimple plate heat exchanger

Wei Wenjian Li Hua
(Danfoss Plate Heat Exchanger China R & D Center, Hangzhou, 310018)

Abstract A novel type of brazed plate heat exchanger, which was developed by Danfoss Plate Heat Exchanger
Co. Ltd. was introduced. Tests of single phase heat transfer and evaporation with refrigerant R410a were
performed. Performance on heat transfer and pressure drop for the dimple plate heat exchanger and the traditional
herringbone plate heat exchanger were investigated experimentally. It is shown that the dimple plate heat
exchanger had a better performance on heat transfer and pressure drop as a single phase heat transfer device. To
compare with the herringbone plate heat exchanger, heat transfer enhancement was at least 20% and the frictional
factor decrease to about 1/4 of the herringbone structure for large Re numbers. Furthermore, good performance on
heat transfer and pressure drop was also found in the evaporation