Numerical Investigation of an Absorption-Diffusion Cooling Machine Using C3H8/C9H20 as Binary Working Fluid
Numerical Investigation of an Absorption-Diffusion Cooling Machine Using C3H8/C9H20 as Binary Working Fluid
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DOI：
10.2516/ogst/2012086
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发表时间：
2013-03
期刊：
影响因子：
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通讯作者：
H. Dardour;P. Cézac;J. Reneaume;M. Bourouis;A. Bellagi
中科院分区：
文献类型：
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作者：
H. Dardour;P. Cézac;J. Reneaume;M. Bourouis;A. Bellagi
本文对一种能在低品位热源下工作的热驱动吸收-扩散制冷机进行了分析和模拟。本研究中考虑的热动力吸收-扩散制冷机的简化配置基于Platen-Munters单压制冷机原理[Platen B. C. V.（1928）冰箱，美国专利1，685- 764 J。使用三种工作流体，壬烷作为吸收剂，丙烷作为制冷剂，氢气作为惰性辅助气体。该机器的设计冷却能力为1千瓦，适用于家用制冷。我们将提供给发电机的驱动热量的最高温度限制在130 °C，这是真空管太阳能集热器可以达到的温度。使用商业上可获得的流片软件进行模拟，其中PengRobinson状态方程作为性质预测方法。在本文中，我们分析了所有相关的机器部件（吸收器，冷凝器，发生器和溶液热交换器）的传热和传质特性。模拟结果允许确定系统的不同参数的值，诸如机器的各个点处的制冷剂和溶剂温度、液体和蒸气流速以及组成。使用流片软件对系统性能进行了参数化分析。性能特性确定了广泛的操作条件，允许调查和评估各种设计参数的影响。
This paper is concerned with the analysis and the simulation of a heat-driven absorption-diffusion cooling machine which can operate with low-grade heat sources. The simplified configuration of the heat-powered absorption-diffusion refrigerating machine considered in this study is based on the Platen-Munters single pressure refrigerators principle [Platen B.C.V. and Munters C.G. (1928) Refrigerator, US Patent 1, 685-764J. Three working fluids are used, nonane as an absorbent, propane as a refrigerant and hydrogen as the inert auxiliary gas. The designed cooling capacity of the machine is 1 kW which is suitable for a domestic use for refrigeration purposes. We restricted the maximum temperature of the driving heat supplied to the generator to 130 °C, a temperature achievable with evacuated-tube solar collectors. The simulations are carried out using a commercially available flow sheeting software with the PengRobinson equation of state as property prediction method. In this paper, we analyze the heat and mass transfer characteristics in all relevant machine components (absorber, condenser, generator and solution heat exchangers). The simulations results allow determining the values of different parameters of the systems such as the refrigerant and the solvent temperatures in various points of the machine, the liquid and the vapor flow rates and compositions. The system performances were parametrically analyzed using the flow sheeting software. Performance characteristics were determined for a wide range of operating conditions allowing investigating and evaluating the effect of various design parameters.