ISPE_8.储存和分配系统STORAGE_and_DISTRIBUTION_SYSTEMS.doc

STORAGE and DISTRIBUTION SYSTEMS 贮存和分配系统 8. STORAGE AND DISTRIBUTION SYSTEMS 8. 贮存和分配系统 8.1 INTRODUCTION 8.1 序论 This chapter provides an overview of eight common distribution configurations and a decision tree to help decide which system best suits the operating requirements. A comparison of tank versus tankless systems is addressed, as well as alternative materials of construction available, and ancillary equipment related to overall distribution systems. Common industry practices are listed as examples, to help clarify regulatory requirements. 本章提供一个八种普通分配配置的概述以及一个决策树来帮助决定什么系统最适合操作设备。连同有效结构的可选材料，以及和整个分配系统有关的辅助设备一起，对有水罐和无水罐系统进行比较。以列表上记载的普通工业实践作为实例来帮助阐明法规要求。 8.2 SYSTEM DESIGN 8.2 系统设计 8.2.1 General Considerations 8.2.1 一般须考虑之事项 A storage system is used to accommodate peak flow requirements against usage rates. The storage system must maintain the feed water quality to ensure the appropriate quality of the end use of product. Storage allows a smaller, less costly pretreatment system to meet peak demand. A smaller treatment system operates closer to the ideal of continuous, dynamic flow. Large manufacturing sites, or systems serving different buildings, may use storage tanks to separate one section of the loop, and others to minimize cross contamination. 贮存系统根据使用率来调节高峰水流的需要量，它必须维持给水质量来确保产品最终使用时的质量。贮存允许较低、较少的成本预处理系统来满足高峰要求。一个小型预处理系统的操作是接近于连续的动态流量的。大的生产场所或为不同建筑服务的系统可以用贮水罐将回路的一部分和其他部分分开以将相互污染减少到最低。 The main disadvantage of a storage tank is its capital cost, and the cost of associated pumps, vent filters, and instrumentation. However, this is usually less than the increased cost of pretreatment equipment sized to handle the peak use rate in the facility. 贮存罐的主要缺点是它的资产成本和相关泵、气滤器和仪器操作的成本。然而，这通常小于按照工厂中处理高峰使用率类型制造的预处理设备增加的成本。 Another disadvantage of storage is that it introduces a region of slow moving water, which can promote bacterial growth. 贮存罐的另外一个缺点是它采用了一个水流缓慢的区域，该区域可能促进细菌生长。 8.2.2 Capacity 8.2.2 容积 Criteria affecting storage capacity include the users demand profile