流动过冷沸腾传热强化及阻垢

在流动沸腾传热实验中，考察了CaCO3污垢溶液的形成过程及各种工艺条件对流动过冷沸腾传热的影响. 研究条件包括流体速度、溶液温度、CaCO3溶液浓度及热通量，实验中发现了一些规律. 同时还考察了不同阻垢剂聚天冬氨酸(PASP)、2-膦酸丁烷-1,2,4-三羧酸(PBTCA)及氨基三甲叉膦酸(ATMP)]对流动过冷沸腾传热的影响. 结果表明，所选阻垢剂均能抑制污垢的生成并降低了污垢热阻，而且存在最佳浓度范围. 但不同阻垢剂的阻垢效果不尽相同，在本实验条件下，ATMP的阻垢效果最好，PBTCA次之，PASP的阻垢效果较差.

Enhancement of Heat Transfer and Scale Inhibition in Flow Subcooled Boiling System

In the experiment of flow boiling heat transfer, the effects of calcium carbonate scaling and various technologcial conditions on flow subcooled boiling heat transfer were studied experimentally. The investigated conditions include liquid flow rate, temperature, concentration of calcium carbonate solution and heat flux. The effect of different scale inhibitors polyaspartic acid (PASP), 2-phosphono-1,2,4-tricarbocylic butane (PBTCA) and amino-trimethylene-phosphonic acid (ATMP)] on flow subcooled boiling heat transfer was also examined. The results show that all the scale inhibitors can suppress the formation of scaling and reduce the fouling resistance, and there exists an optimum range of scale inhibitor concentration. However, different scale inhibitors perform differently, and under the experimental conditions, ATMP has the best effect of reducing fouling, followed by PBTCA and PASP.