本文基于ASHRAE研究项目RP-1345的研究结果。钎焊板式换热器（BPHE）最近被引入空调行业，因为它们可以提供更高的单位体积传热率，并且比传统的管壳式换热器更紧凑。本文介绍了用于冷却塔直接冷媒水冷凝器的BPHEs水侧污垢性能的实验数据。实验研究了制冷剂冷凝温度和水质的影响，并确定了污垢阻力的渐近值。 在受控的实验室污垢实验中，采用了105.5°F和120°F（c.41°c和c.49°c）的两个饱和温度以及两种高和中等污垢电位的水质，具有软V形波纹角的BPHE受到这些操作参数的显著影响。对于硬V形波纹角，污垢阻力仍然取决于制冷剂饱和温度，但在污染条件下，热流密度的退化仅为几个百分点。 板的污垢对水侧压降有显著影响，比清洁条件下BPHE的相应水侧压降高10%到11倍。本文还对冷却塔水质的影响进行了量化，并推导出了具有中度至重度矿物结垢条件的水的污垢阻力的渐近值。引文:伊利诺伊州芝加哥ASHRAE Transactions第118卷第1部分

This paper is based on findings resulting from ASHRAE Research Project RP-1345.Brazed-plate heat exchangers (BPHEs) have been recently introduced in the air-conditioning industry because they could provide higher heat-transfer rate per unit volume and are more compact than conventional tube-and-shell exchangers. This paper presents experimental data of waterside fouling performance of BPHEs used in direct refrigerant-to-water condensers for cooling tower applications. The effects of refrigerant condensation temperature and water quality were experimentally investigated and asymptotic values of the fouling resistance were determined. Two saturation temperatures of 105.5°F and 120°F (c.41°C and c.49°C) and two water qualities for high- and medium-fouling potentials were applied in controlled laboratory fouling experiments and BPHEs with soft chevron corrugation angles were significantly affected by these operating parameters. For hard chevron corrugation angles, the fouling resistance was still dependent on the refrigerant saturation temperature, but the degradation of the heat flux in fouled condition was only of few percents. The fouling of the plates affected the waterside pressure drop significantly, which was from 10% higher up to 11 times higher than the corresponding waterside pressure drop across the BPHE in clean conditions. The effect of the cooling tower water quality was also quantified in the present work and asymptotic values of the fouling resistance were derived for water with moderate to severe mineral scaling conditions.