摘要
由于其工作介质不含氟利昂,以及可利用较低品质废热和太阳能等从而节约能源减少二氧化碳的排放量等优点,近年来吸收式制冷机/热泵越来越受到关注。但是为了与压缩式制冷机在所有市场范围内进行竞争,还需要进一步提高性能,降低成本和减小尺寸。而其中吸收器是吸收式机组中的关键设备,无论对整机性能还是外形尺寸都有很大影响。与传统的溴化锂水平管式吸收器不同,从易于布置从而减小机组尺寸的角度出发,开展了平板型吸收器的研究并给出相关实验结果,以期为该类型吸收器的设计提供参考。
An experimental study on characteristics of a plate-type absorber using LiBr/water as working fluid has been performed. For a plate-type absorber with different temperatures of solution, flow rates of cooling water, vapor flow velocities, and with or without additive 2 EH, experiments were conducted for the solution film Reynolds numbers of 20-200, at a constant concentration of strong solution of 62 wt%. The results show that absorption heats decrease with solution temperature and increase with flow rate of cooling water. While heat transfer coefficient decreases with flow rate of cooling water. Absorption heat and heat transfer coefficient decrease with the vapor flow velocity but if the vapor speed is lower than 20 m/s the decrease of absorption heat is not very much. Under this experimental condition additive 2 EH improved absorption heat and heat transfer coefficient by 50-100%.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2005年第2期266-270,共5页
Acta Energiae Solaris Sinica
关键词
吸收
传热
平板型
溴化锂
Absorption
Heat transfer coefficients
Lithium compounds
Reynolds number
Solar energy
Waste heat
