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# 绪论 - PowerPoint PPT Presentation

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## 绪论

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200°C、150MPa

1、性质：技术基础课

2、任务：

1）根据各单元操作在技术上和经济上的特点，进行“过程和设备”的选择，以适应指定物系的特性，经济而有效地满足工艺的要求。

2）进行过程的计算和设备的设计。

3） 进行操作和调节以适应生产的不同要求。在操作发生故障时如何寻找故障的缘由。

3、内容

1、物料衡算

F = d +A

F──输入物料质量的总和，kg

d ──输出物料质量的总和，kg

A──积累在过程中的物料质量，kg

2、能量衡算

QF = QD + q

QF––输入该过程的各物料带入的总热量,J

QD––输出该过程的各物料带出的总热量,J

q––该过程与环境交换的总热量，当系统向环境散热时为正，称为热损,J

3、平衡关系

4、过程速率：

1、单位制度

2、单位换算：

=1.013×105N/m2