技术中心

【摘要】 为了模拟空调系统在部分负荷下的运行状况,提出了一种适于变工况下模拟的螺杆式冷水机组模型。根据基本的物理、流动和传热理论建立了由满液式蒸发器、壳管式冷凝器和压缩机子模型组成的水冷螺杆式冷水机组模型,然后利用FORTRAN语言进行编程并植入TRNSYS软件进行了模拟。结果表明,当冷负荷在100%-50%之间变化时,模拟COP值与实测COP值的相对误差在5%以内。这说明,本模型适于冷水机组在冷冻水流量、冷却水流量、冷负荷变化三参数变化下的模拟。 【Abstract】 For predict the performance of screw chillers in a variable operating conditions,a model suitable for variable conditions simulation was presented.Based on the primary physics,fluid and heat transfer theory,the son-models including the compressor,shell and tube condenser and f looded evaporator were present.Taken TRNSYS as the simulation platform,a simulation of the chillers was completed.Compared the prediction value and the experiment value,the errors are within 5%.The results show that the model has high accuracy and are suitable for variable conditions simulation. 【关键词】 变工况; 螺杆式冷水机组; 模型 【Key words】 Screw chillers; Dynamic simulation; Model