Supplementary data and results of the application of a proposed approach of the characteristic equation method in a thermodynamic simulation for different single-effect lithium bromide/water (LiBr/H2O) absorption chillers
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A proposed approach of the characteristic equation method presented in a previous study (Fischer et al., 2020) was thermodynamically simulated for six different LiBr/H2O single-effect absorption chillers in a more recent study. The input data of the internal parameters of each absorption chiller, which are all the overall heat transfer conductances (UA) and the internal mass flow rate of the weak solution of the absorption chiller were collected in the literature (Boudehenn et al., 2014; Fischer et al., 2020; Martínez et al., 2016; Herold et al., 2016; Gommed and Grossman, 1990) The input data of the temperatures and mass flow rates of the external water circuits were selected from the usual nominal temperature ranges were found in the literature. Figure 1 presents the single-effect lithium bromide/water (LiBr/H2O) absorption chiller with its components and temperature points numbered. The numbers in this figure correspond to the chiller points in the study as well. The values of the input data of the internal parameters of each absorption chiller are shown in Table 1. The chiller Tables present the values of the input data of the temperatures of the external water circuits and the main results of the simulation. The figures of the graphs present the distribution of the points of the results of the simulation. References: Fischer, Y., Dutra, J. C. C., Rohatgi, J. (2020): Thermodynamic modelling of a LiBr-H2O absorption chiller by improvement of characteristic equation method. International Journal of Refrigeration, vol. 120, pp. 420-429. Boudéhenn, F., Bonnot, S., Demasled, H., Lazrak, A. (2014): Comparison of different modeling methods for a single effect water-lithium bromide absorption chiller. Proceedings of the International Conference on Solar Energy and Buildings, Aix-les-Bains, France. Martínez, J. C., Martinez, P. J., Bujedo, L. A. (2016): Development and experimental validation of a simulation model to reproduce the performance of a 17.6 kW LiBr-water absorption chiller. Renewable Energy, vol 88, pp. 473-482 Herold, K. E., Radermacher, R. Klein, S. A. (2016): Absorption chiller and heat pumps. CRC Press, New York, 2nd ed. Gommed, K., Grossman, G. (1990): Performance analysis of staged absorption heat pumps: water-lithium bromide systems. Ashrae Transactions, vol. 96, part 1.
本研究针对6台不同型号的溴化锂/水（LiBr/H₂O）单效吸收式制冷机，采用既往研究（Fischer等，2020）提出的特征方程法（Characteristic Equation Method）改进方案开展了热力学仿真。 每台吸收式制冷机的内部参数输入数据，即总传热系数（overall heat transfer conductances, UA）与制冷机稀溶液内部质量流量，均从公开文献中收集得到（Boudehenn等，2014；Fischer等，2020；Martínez等，2016；Herold等，2016；Gommed与Grossman，1990）。 外部水回路的温度与质量流量输入数据，则选取自文献中记载的常规标称温度区间。 图1展示了单效溴化锂/水（LiBr/H₂O）吸收式制冷机的结构组成与标注编号的温度节点，图中编号与本研究中制冷机各节点一一对应。 各台吸收式制冷机的内部参数输入数据详见表1。 制冷机配套表格列出了外部水回路温度的输入数据与本次仿真的主要结果。 各类绘图展示了仿真结果各节点的分布情况。 参考文献： Fischer, Y., Dutra, J. C. C., Rohatgi, J. (2020): 基于特征方程法改进的LiBr-H₂O吸收式制冷机热力学建模. 国际制冷学报, 第120卷, 第420-429页. Boudéhenn, F., Bonnot, S., Demasled, H., Lazrak, A. (2014): 单效水-溴化锂吸收式制冷机不同建模方法的对比. 太阳能与建筑国际会议论文集, 法国艾克斯莱班. Martínez, J. C., Martinez, P. J., Bujedo, L. A. (2016): 17.6 kW LiBr-水吸收式制冷机性能复现仿真模型的开发与实验验证. 可再生能源, 第88卷, 第473-482页. Herold, K. E., Radermacher, R., Klein, S. A. (2016): 吸收式制冷机与热泵. CRC出版社, 纽约, 第2版. Gommed, K., Grossman, G. (1990): 分级吸收式热泵性能分析：水-溴化锂系统. 美国采暖、制冷与空调工程师学会汇刊, 第96卷, 第1分册.
