第64卷第4期
2013年4月
化工学报
CIESC
V01.64April
No.42013
Journal
常见液体除湿剂池内核态沸腾换热特性
徐惠斌,宋新南,葛风华,胡自成,顾
锋
(江苏大学能源与动力工程学院,江苏镇江212013)
摘要:溶液除湿剂的沸腾式再生能够降低除湿空调对室外环境的依赖性,而溶液的沸腾特性的研究对沸腾再生器的设计有重要意义。针对3种常规除湿溶液及一种配方型除湿剂的池内核态沸腾特性展开实验研究。研究发现:3种溶液的沸腾温度均随着浓度的增加而升高;3种溶液的沸腾传热系数均低于水,并随浓度的增加而降低,但是当浓度增大到极限时,溶液中有小颗粒析出,其传热系数却提高。相近传质能力条件下,溴化锂溶液与氯化钙溶液的沸腾换热性能优于氯化锂溶液;在氯化锂溶液中添加一定量的氯化钙溶液能够优化氯化锂溶液
的沸腾换热性能。
关键词:除湿溶液;池内核态沸腾;沸腾温度;传热系数;表面张力
DOI:10.3969/j.issn.0438—1157.2013.04.012
中图分类号:TK
124
文献标志码:A文章编号:0438—1157(2013)04—1211—06
Poolnucleateboilingheattransferofconventionaldesiccantsolutions
XUHuibin,SONGXinnan,GEFenghua。HUZicheng
I
GUFeng
(SchoolofEnergyandPowerEngineering,JiangsuUniversity,Zhenjiang212013,Jiangsu,China)
Abstract:Boilingregenerationofliquidconditioningthedesign
on
desiccantsolution
on
can
reducethedependence
ofdesiccantair—
theoutdoorenvironment.Thestudyboiling
regenerators.In
one
boilingcharacteristicsofsolutionissignificantfor
pool
nucleate
boiling
characteristics
of
three
ofthis
study,the
conventionaldesiccantsolutionsand
formuladesiccantagentwereinvestigatedexperimentally.Forthe
threedesiccantsolutions,theboilingtemperatureincreaseswiththeincreaseofconcentration;theirheattransfercoefficients
are
10werthanthatofwateranddecreasewith
tO
a
as
concentrationincreases,butwhen
heattransfercoefficient
theconcentrationincreases
limit
SO
thatsmallparticlesprecipitate,the
increases.Forsimilarmasstransfercapacity,theboilingheatsolutionandcalciumchloridesolutioniSsuperior
tO
transferperformanceoflithiumbromide
thatoflithiumchloride
solution.With
theadditionof
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