多管束水平降膜吸收模型在溴化锂吸收式制冷机中应用.pdfVIP

多管束水平降膜吸收模型在溴化锂吸收式制冷机中应用 解国珍 盛国刚 李国栋 高原 (北京建筑工程学院环境与能源工程学院, 北京, 100044) 摘 要 基于单管冷却水平降膜吸收模型之上，本文将其应用到多管束吸收器部件和吸收式制冷机性能的仿 真和预测。经过建立制冷机吸收器和整机的仿真数学模型，利用 VB 语言进行编程，并在建立的溴化锂性 能试验台进行实验数据的测试，对数学模型进行验证。研究结果表明，所建应用模型能够较好的预测吸收 式制冷机的吸收效率和机组的热力特性。 关键词 溴化锂溶液 降膜吸收 仿真模拟 吸收式制冷 亚稳态热力平衡 MODELLING OF FALLING FILM ABSORPTION ON MULTI-HORIZONTAL TUBES IN A LITHIUM BROMIDE ABSORPTION CHILLER Xie Guozhen ShengGuogang Li Guodong Gao Yuan (School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing, 100044) Abstract Based on the principle of falling film absorption on single horizontal tube, this paper establishes the mathematical of bundle tubes of the absorber in a Lithium-bromide absorption chiller, which could be used to simulate the behavior of the chiller. The models were programmed in Vision Basic Language, and validated by the experimental data from the test rig. The researching results show that the models and program can be reasonably used for predicting the performance of the chiller such as the spraying rate of LiBr aqueous solution in absorber, the concentration, integrated heat transfer coefficient and the refrigerating capability of whole refrigerating unit. Keywords Lithium-bromide aqueous solution; falling film absorption; simulation; absorbing refrigeration; sub-steady thermodynamic equilibrium 质的途径，研究方法是理论和实验相结合。建模仿真 0 引言 来研究其静态和动态特性是途径之一[1] ~ [4] 。对于传热 众所周知，溴化锂吸收式制冷机组由于它具有利 管，建立单管水平降膜理论模型，探讨液膜在吸收过 用余热和可持续太阳能源、 燃烧天然气有利节能减 程中传热传质的机理和规律， 采取强化措施[5] ~ [9] 。 排、制冷剂有利于环保的特性而被广泛地应用于空调 本文应用溴化锂单管水平降膜理论模型， 结合一台 领域。 因