热源塔结构特性对其换热性能影响的实验研究  

Experimental Study on the Influence of Structure Characteristics on Heat Transfer Performance of Heat Source Tower

作　　者：周翔 李念平[1] 崔海蛟[1] 张楠[1] ZHOU Xiang;LI Nian-Ping;CUI Hai-Jiao;ZHANG Nan(College of Civil Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学土木工程学院,长沙410082

出　　处：《科学技术与工程》2018年第27期228-232,共5页Science Technology and Engineering

基　　金：十三五国家重点研发计划(2016YFC0700305;2016YFC0700306)资助

摘　　要：利用搭建的开式热源塔实验平台进行实验,从塔身设置和进口参数两方面对热源塔换热性能进行分析。塔身设置包括喷嘴位置、进风口位置及有无填料层。进口参数包括室外空气温度、溶液进口温度及截面风速。实验结果证明热源塔下进风时的吸热效率优于上进风,其中无填料上喷下进风式换热性能最优;填料层可以促进气液之间的热质交换,但进风阻力变大,热源塔能耗比降低。对于进口运行参数,在下进风工况下,当风速增大时,热源塔的吸热效率均得到提升,但风速过大,吸热效率仅有微小提高,且塔身能耗比下降较快;溶液进口温度升高,热源塔的吸热效率提高幅度为30.1%~34.6%,进出口溶液温差降低了0.9~1.2℃;室外空气温度升高热源塔的进出口溶液温差明显增大,但吸热效率降低。Using the experimental platform of the open heat source tower(OHST),the heat transfer performance of the OHST is analyzed from two aspects:tower modification and inlet parameters.The tower modification includes the spray nozzle positions,air inlet positions,packing layer.The inlet parameters include the air dry-bulb temperatures,inlet solution temperatures,wind velocities.It is found that the heat absorption efficiency of upward wind OHST is better than that of the downward wind,and the upward wind of the non-packing OHST is the best.The packing layer can promote the heat and mass transfer between the air and liquid,but the tower resistance becomes larger and the cop of the OHST is reduced.The influence of inlet parameters on heat transfer performance of upward wind OHST is analyzed.The results show that when the wind speed increases,the heat absorption efficiency of the OHST is improved.However,if the wind speed is too large,the heat absorption efficiency is only slightly increased,and the cop of the tower decreases faster.The increase of the inlet solution temperature,the increase of the heat absorption efficiency of the OHST is between 30.1%~34.6%,and the solution temperature difference is reduced by 0.9~1.1℃;the solution temperature difference increases obviously with increasing air dry-bulb temperatures,but the heat absorption efficiency decreases.

关 键 词：开式热源塔 能效比 填料层 进出口溶液温差 吸热效率 

分 类 号：TU833[建筑科学—供热、供燃气、通风及空调工程]