无泵溴化锂吸收式空调器的仿真研究

【作者】 吴玉莹；

【导师】 刘振全； 张中诚；

【作者基本信息】 兰州理工大学 ， 化工过程机械， 2003， 硕士

【摘要】 目前国内外的大型吸收式制冷装置技术已相当完善，但因制冷量均很大，不适合小冷量场合使用。介于我国天然气工业的迅速发展，空调在家用领域的普及，利用天然气进入城市家用领域的管网，可以直接以天然气为能源，着重提出发展小冷量场合下使用的无泵溴化锂吸收式空调器。 本文对小型溴化锂吸收式空调器进入空调小冷量场合使用，与传统的以电能为能源的空调器在经济性，环保性，节能性进行了分析比较，可以认为无泵式溴化锂吸收式空调器具备进入家用空调领域的很强的竞争力。 本文对无泵溴化锂吸收式空调器的关键部位，气泡泵的特性按照流体力学两相流的理论进行了分析研究，并应用两相流的分相模型，建立了数学模型，并进行了数值模拟计算。对气泡泵的主要的特性参数，直径，提升高度，吸收器液面设计高度，制冷量，浓度差的相互关系，在文中进行了详尽的数值仿真计算，并对仿真结果进行了理论分析。 文中对无泵溴化锂吸收式空调器进行了传热与热力计算，给出了各个状态点的参数和换热面积。并在设计计算的无泵溴化锂吸收式空调器的基础上，根据制冷系统内部的能量平衡，质量平衡，以及相平衡，建立了无泵溴化锂吸收式空调器的热力学系统模型。并进行了变工况系统仿真，得到了详尽的仿真结果，并对仿真结果进行了分析，得到了无泵溴化锂吸收式空调器在变工况下的运行特性。更多还原

【Abstract】 The technology of the large-size LiBr absorption refrigeration is already very perfect, but the cooling load all are big and is not fitful for a situation of a small cooling load. So, according to our national nature gas industry’ station and future, combining itself characterize of air-condition, suggesting to develop the application of a sort of LiBr absorption air-condition which is drived directly by heat source coming from nature gas’burnning .In the text, Baed on the no-pump LiBr absorption air-condition will break into the family air-condition market, comparing it to the air-condition drived by electricity on environmental protection, economize on energy and economy. We can draw a conclusion that the air-condition have a good rivalrousness. the air-condition enlarge space of absorption chiller utilising nature gas.In the text applying the theory of two-phase flow’press-drop and diversion-phase model, having a analysis to the press characterize of the important part namely the bubble pump of the no-pump LiBr absorption air-condition , and set up the relational mathematical model. Program of the model was built and having a mathematical simulation. And perfoimed a detailed analysis of the simulation result of the important characterize parameter, the height of advance, the height of the absorption’s liquor face, and the difference of the LiBr density.In the text thermodynamics and heat transfer calculation of the no-pump LiBr absorption refrigeration were performed, and carried out the values of various state point, the heat load and the areas of each apparatus. Based on the calculated result, according to the principle of mass conservation, energy conservation and the phase equilibrium, a thermodynamics model of the system was set up. A program was designed from the model, carried a simulation under different operation states. Having a analysis and getting the system running performance under different operation states.更多还原