制冷系统和热泵 - 泄压装置及其相关管道 - 计算方法

[中文适用范围]： 本文件描述了以下计算：- 制冷系统部分的压力 relief 设备的流量；- 制冷系统中压力 relief 阀门和其他 pressure relief 设备的排放能力，包括用于选择这些设备的数据；- 压力 relief 阀门和其他 pressure relief 设备入口和出口管路中的压力损失，并包括必要的数据。本文件指定了选择压力 relief 设备的要求，以防止由于内部和外部热源、导致压力升高的来源（例如压缩机、加热器等）以及被困液体的热膨胀而导致的压力过高。注意：本文件中使用的术语“制冷系统”包括热泵。 [外文原描述]： This document describes the calculation of: — mass flow for sizing pressure relief devices for parts of refrigerating systems; — discharge capacities for pressure relief valves and other pressure relief devices in refrigerating systems including the necessary data for sizing these when relieving to atmosphere or to part of the refrigerating system at lower pressure; — the pressure loss in the inlet and outlet lines of pressure relief valves and other pressure relief devices and includes the necessary data. This document specifies the requirements for selection of pressure relief devices to prevent excessive pressure due to internal and external heat sources, the sources of increasing pressure (e.g. compressor, heaters, etc.) and thermal expansion of trapped liquid. NOTE The term "refrigerating system" used in this document includes heat pumps.