污水源热泵系统污水侧声空化防除垢与强化换热特性研究  

CHARACTERISTIC RESEARCH ON ANTI-DESCALING AND HEAT TRANSFER ENHANCEMENT IN SEWAGE SIDE OF SEWAGE-SOURCE HEAT PUMP SYSTEM WITH ACOUSTIC CAVITATION

作　　者：钱剑峰[1] 任启峰[1] 徐莹[1] 张吉礼[2] 孙德兴[3] Qian Jianfeng1, Ren Qifeng1, Xu Ying1, Zhang Jili2, Sun Dexing3(1. School of Energy and Civil Engineering, Harbin University of Commerce, Harbin 150028, China; 2. School of Civil ＆ Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China ; 3. School of Municipal ＆ Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China)

机构地区：[1]哈尔滨商业大学能源与建筑工程学院,哈尔滨150028 [2]大连理工大学土木水利学院,大连116024 [3]哈尔滨工业大学市政环境工程学院,哈尔滨150090

出　　处：《太阳能学报》2018年第10期2728-2736,共9页Acta Energiae Solaris Sinica

基　　金：中国博士后科学基金(20100471447);国家自然科学基金(51208160);黑龙江省高校青年人才培养计划(UNPYSCT-2015072)

摘　　要：基于污水源热泵系统，建立超声波声空化防除垢与强化换热动态实验台，对污水流速为0．45、0．65、0．84、0．9l、1．29和1．74m／s，换热管内径为15mm／20mm，超声波功率为250W／500W，声空化作用时间为0～60min，污垢含水率为35％～95％以及不同的污水黏度和温度等特性参数下开展实验研究，分析计算污水侧换热管的污垢增长特性和防除垢规律以及强化换热效果的实验数据，对比研究特性参数对污水侧换热管运行特性的影响。研究表明：存较大的换热管径或污水流速下，污水侧换热管积垢速率和结垢率均偏低，除垢率和传热系数均偏高；在较大的超声波功率下，除垢率效果更好，传热系数效率显著提高；在较高的污垢含水率下，传热系数降低及其效率提高明显；随声空化作用时间的增加，除垢率和传热系数均显著提高，但在约50min时趋于稳定，当流速为1．29m／s时，传热系数效率提高百分比达到53．4％；另外，污水黏度和污水温度对污水侧换热管运行特性也有一定影响。总之，声空化应用在污水源热泵系统污水侧防除垢与强化换热方面是可行的。The dynamic experiment table of acoustic cavitation ultrasonic anti-descaling and enhanced heat exchange was established based on sewage-source heat pump system, the experiment study was carried out under the different characteristic parameters such as 0.45, 0.65, 0.84, 0.91, 1.29 and 1.74 m/s sewage flow speeds, 15 mm/20 mm inner diameter of heat exchange tubes, 250 W and 500 W ultrasonic power, 0-60 rain acoustic cavitation action time, 35%- 95% fouling moisture content, and the different viscosity and temperature of the sewage etc. The fouling growth characteristics and anti-desealing laws of the sewage side heat exchange tubes and the experimental data of strengthening the heat exchange effect were analyzed and calculated, and the effect of the characteristic parameters on the operating characteristics of the sewage side heat exchange tubes was compared. The results indicate that under the larger experimental tubes diameter or flow speed of sewage, both fouling rate and scaling rate of sewage side heat exchange tube are low, but the descaling rate and heat transfer coefficient are relatively high. Under the larger ultrasonic power, descaling rate effect is better, the heat transfer efficiency is significantly improved. Under the higher fouling moisture rate, the heat transfer coefficient is decreased and the heat transfer efficiency is increased obviously. With the increase of the acoustic cavitation action time, descaling rate and heat transfer coefficient increase obviously and tend to be stable at about 50 rain. When the flow speed is 1.29 m/s, the increased percentage of the heat transfer coefficient reaches 53.4%. In addition, the viscosity and temperature of sewage have some influence on the operation characteristics of sewage side heat exchange tubes. In general, the application of acoustic： cavitation is feasible in anti-descaling and heat exchange enhancement of the sewage side of sewage-source heat pump system.

关 键 词：污水 热泵系统 声空化 防垢 除垢 强化换热 

分 类 号：TB559[理学—物理] TU831.6[理学—声学]