负责控制工作场所污染物的工程师需要额外的分析程序，以达到满足职业安全与健康管理局（OSHA）标准所需的精度。他们没有分析程序来预测污染源附近的污染物浓度，但OSHA要求将污染物浓度控制在百万分之几。目前的设计程序包括对控制系统的描述，这些控制系统满足特定的工业操作，但不能推广到任意配置，如工作场所通常需要的配置。 当前程序中还给出了确定通风体积流量和控制系统临界尺寸的指南。虽然这些信息对初步设计有用，但设计师甚至无法对操作员呼吸区（OBZ）或污染源附近其他点的污染物浓度进行定性估计。本研究的目的是通过开发一种定量工具来纠正这种情况，该工具将预测任意大小和形状的研磨室中设计师指定位置的污染物浓度。 该方法基于计算机辅助设计程序，该程序与计算机图形学相结合，使工程师能够（1）通过在感光平板上用光笔实际绘制通风系统的形状来指定通风系统的形状；（2） 输入通风流量，计算设计人员选定点的污染物浓度；（3）以图形和数字的方式显示结果，以便改变通风系统的几何形状或通风流量，并重复该过程。引文:ASHRAE Transactions，1983年，第卷。 第89页。华盛顿特区2A。

Engineers responsible for controlling contaminants in the workplace need additional analytical procedures to achieve the precision necessary to satisfy Occupational Safety and Health Administration (OSHA) standards. They do not have analytical procedures to predict the concentration of contaminants in the vicinity of the source, yet OSHA requires contaminants to be controlled to concentrations in parts per million. Present design procedures consist of descriptions of control systems that are satisfactory for specific industrial operations but cannot be generalized to arbitrary configurations, such as are generally necessary in the workplace. Guidelines for sizing the ventilation volumetric flow rate and critical dimensions of the control system are also given in the current procedures. While this information is useful for a preliminary design, the designer is unable to make even qualitative estimates of the contaminant concentration in the operator's breathing zone (OBZ) or at other points in the vicinity of the source.The objective of the present research is to begin to remedy this situation by developing a quantitative tool that will predict contaminant concentrations at locations specified by the designer in grinding booths of arbitrary size and shape. The method is based upon a computer-aided design procedure, which is coupled with computer graphics to enable engineers to (1) specify the shape of the ventilation system by physically drawing it with a light pen on a sensitized tablet; (2) input ventilation flow rates and compute the contaminant concentration at points selected by the designer; and (3) display the results graphically, as well as numerically, so that either the geometry of the ventilation system or the ventilation flow rate can be changed and the process repeated.