新型扩散吸收式制冷中溶液再循环倍率对系统性能的影响  

SIMULATION STUDY ON THE EFFECT OF SOLUTION RECIRCULATION RATIO ON PERFORMANCE OF A NOVEL DIFFUSION ABSORPTION REFRIGERATION SYSTEM

作　　者：戴雨辰 陈飞[1,2] 李宏顺[1] 王寒栋[2] Dai Yuchen Chen Fei Li Hongshun Wang Handong(School of Science, Wuhan Institute of Technology, Wuhan 430205, China School of Mechanical and Engineering, Shenzhen Polytechnic, Shenzhen 518000, China)

机构地区：[1]武汉工程大学理学院,武汉430205 [2]深圳职业技术学院机电学院,深圳518000

出　　处：《太阳能学报》2017年第9期2467-2473,共7页Acta Energiae Solaris Sinica

基　　金：深圳市科创委战略新兴产业专项资金(JCYJ20130331150226792);深圳职业技术学院重点项目(2213K3020001)

摘　　要：对新型太阳能驱动、带循环泵的NH_3/LiNO_3/He扩散吸收式制冷系统中溶液再循环倍率k值与系统性能系数COP的变化规律进行模拟与分析。结果表明,在不同的发生温度T_g、冷凝温度T_c、最大蒸发温度T_e及喷淋温度T_(24)下,系统COP随溶液再循环倍率k值的增大,普遍呈现先增后减的趋势,因此每一工况下均存在相应的COP和k值;但由于上述各工况和k值对喷淋溶液浓度x_(24)和吸收温度Ta的影响各具特点,导致各工况下的影响程度并不完全相同。在最大蒸发温度为0℃、冷凝温度和喷淋温度为30℃的典型工况下,当发生温度为80~100℃时,k值的最优值在2.5~3.0之间,对应的COP在0.401~0.458之间。机组实际运行时,可根据运行工况条件适当调节相应的k值以提高系统的性能。This paper mainly simulates and analyzes coefficient of performance （COP） of a novel diffusion the relationships between the solution recirculation ratio （k） and absorption refrigeration system with solution pumps. The results show that under different given working conditions such as generatortemperature （T g） , condenser temperature （Tc） , maximum evaporator temperature （Tc） and spray temperature （T24）, the COP increases first and then decreases with the solution recirculation ratio increasing. Thus, there is an optimal COP or k at every given working condition. However, in those mentioned conditions, the influence characteristics are not exactly the same due to the different effects of the working conditions and the k values on the inlet concentration of sprayed solution （x24）and the absorber temperature （T,）. The simulation results of a typical working condition （when Te, Tc, T24 are 0 ℃, 30 ℃, 30 ℃, respectively） show that the optimal k values are in the rage of 2.5-3.0 when Tg varies from 80 ℃ to 100 ℃, and the corresponding COP varies from 0.401 to 0.458. Thus the COP can be improved by adjusting the k value appropriately according to the corresponding working conditions when the refrigerator is running.

关 键 词：扩散吸收式制冷 NH3/LiNO3 溶液再循环倍率 COP 太阳能 

分 类 号：TB616[一般工业技术—制冷工程]