摘要
用分布参数的方法,建立了冷凝器动态参数数学模型。在建模时,考虑到当冷剂流速不同时冷剂侧可能出现不同的流型,建立了针对不同流型的动态方程组。提出了使模型方程封闭可解的界面关系方程。用此数学模型对空调器中的冷凝器在空调工况下,进行了稳态工况下的模型计算。用准则数F_r,W_e的大小来判别两相区内冷剂的流型,从而用相应的流型方程组进行计算。计算结果得出了冷剂侧(包括两相流各主要参数,空隙率、滑动比等),管壁及空气温度等参数沿管长的变化关系。为系统的动态参数模型的建立和计算、优化产品结构,充注量的准确计算以及对管内两相流的正确理解打下基础。
With the method of distributed, a dynamic mathematical model of condenser is developed. Considering that the refrigerant dynamic equations for different flow types are set up. An interphase equation which can make the model equations solvable is porposed. By using this model, at the air condition work condition, a condenser of air conditioner is chosen to carry out the model's calculation at the steady work condition. The folw types in the two-phase are judged by the Froude number (Fir) and Weber number (We), so that the model can be computed with the corresponding flow-type equations. The changing relations of the parameters of refrigerant side, tube and air temperatures with the tube length are obtained. The work makes a good base, with which the building and calculation of the whole dynamic model, the optimization of product structure, the accurate calculation of refrigerant charge and the understanding of the two phase can all be made.
出处
《制冷学报》
CAS
CSCD
1995年第3期17-26,共10页
Journal of Refrigeration
基金
博士学科点专项科研基金资助
