This video shows how to build a working model of a cross-flow, one pass,shell and tube heat exchangerfor the purpose of analyzing the heat transfer coefficient of the design as well as the tube and shell side pressure drops. In this model, two separate fluids at different temperature pass through the heat exchanger, flowing in opposite directions. In the shell of the heat exchanger, air enters at a velocity of 1m/s and a temperature of 5°C. Water enters the tube side with a velocity of 0.1 m/s and a temperature of 80°C. A k-epsilon turbulence model is used to analyze both the air and water flow profiles. The separating conducting material is assumed to be structural steel. The solution is checked for accuracy by analyzing the upside wall lift-off, which indicates that the model is accurate enough for the purpose of our analysis.
本视频演示如何构建错流式单程管壳式换热器的工作模型，分析换热器设计的传热系数和管壳两侧的压降。在模型中，两种不同温度的流体以相反方向流过。在换热器壳侧，空气流入时的速度为 1m/s，温度为 5°C。管侧水流入的速度为 0.1 m/s，温度为 80°C。本例使用 k-ε 湍流模型来分析空气和水的流动剖面，其中假设将它们隔离的导热材料为结构钢。最后，通过分析上侧壁抬升距离检查求解结果的精度，结果表明，该模型足够准确，符合我们的分析要求。
