The pipework system determines the choice of the pump performance. Indeed, its characteristics have to be combined with those of the pumps to obtain the required performance of the pumping installation as shown in the Figure 3.37 below.

The energy consumption directly connected to the piping system is the consequence of the friction loss on the liquid being moved, in pipes, valves, and other equipment in the system. This loss is proportional to the square of the flowrate. Friction loss can be minimised by means such as:
●avoiding the use of too many valves
●avoiding the use of too many bends (especially tight bends) in the piping system
●ensuring the pipework diameter is not too small.

管路系統決定泵浦功能的選擇，更確切地，管路系統的特性要與泵浦的特性一起來看，以得到所需要的設施效能，如下3.37圖示為泵浦揚程與流率的關係曲線:
與管路系統直接相關的能耗是來自流體通過管線、閥件及系統中其他組件產生磨擦的損失，這些損失與流率的平方成正比。下列措施可以減少磨擦損失:
●避免使用過多的閥件
●管路系統中避免使用過多的彎頭，尤其是彎接頭。
●確認管路系統的直徑不會太小

None reported.

無

The applicability of particular measures, and the extent of cost savings depend upon the size and specific nature of the installation and system. Only an assessment of a system and the installation needs can determine which measures provide the correct cost-benefit. This could be done by a qualified pumping system service provider or by qualified in-house engineering staff.
The assessment conclusions will identify the measures that are applicable to a system, and will include an estimate of the savings, the cost of the measure, as well as the payback time.

一些特別的使用方法及節省的成本端視設施和系統的規模與特性而定。只有評鑑過系統及設施才能決定其正確的成本效益。此評鑑可由合格的泵輸系統服務供應商或合格的公司內部工程師來執行。
評鑑結論可用來辨明系統該使用何種方法、估計節省的成本、實施成本及回收年限等資料。

Pumping systems often have a lifespan of 15 to 20 years, so a consideration of lifetime costs against initial (purchase) costs are important.
Pumps are typically purchased as individual components, although they provide a service only when operating as part of the system, so a consideration of the system is important to enable a proper assessment of the cost-benefit.

通常泵浦系統有較長的使用年限(15~20年)，所以全使用年限的成本和初設成本間的考量是很重要的。
一般而言，泵浦都是單獨採購的，雖然在系統內可提供部分功能，但系統在評估成本效益時，泵浦的購置成本應考量在內。

Energy Efficiency (2009) 3.8.3