厦门新机场分布式区域供冷输配二级泵系统定压差方案比选
Constant pressure difference schemes for distributed district cooling transmission secondary pump system of Xiamen New Airport
摘要：
基于管网动力学数学模型，定量分析了厦门新机场分布式区域供冷输配二级泵系统在输送管网始端（主管线第一个用户分支处）定压差和末端（最不利用户处）定压差2种不同控制方案下管网泵和用户泵的全年运行工况和总能耗。结果表明，相比末端定压差方案，始端定压差方案的循环泵电动机容量低11.1%，年运行电耗低15.6%，管网泵和用户泵的全年运行效率更高。该工程始端定压差方案具有投资少、运行费低及运行控制相对简单可靠的优点，建议采用。
Abstract：
Based on the dynamic mathematical model of pipe network, under the control schemes of constant pressure difference at beginning (the first user branch of the main line) and constant pressure difference at end (the most unfavorable hydraulic user location), quantitatively analyses the annual operating conditions and total energy consumption of the pipeline pumps and user pumps of the distributed district cooling transmission secondary pump system of Xiamen New Airport. The results show that, compared with the scheme of constant pressure difference at end, the circulating pump motor capacity of the scheme of constant pressure difference at beginning is lower by 11.1%, the annual operating power consumption is lower by 15.6%, and the annual operating efficiency of pipeline pumps and user pumps is higher. For the project, the scheme of constant pressure difference at beginning is recommended for its advantages of small investment, low operating cost, and relatively simple and reliable operation control.
Keywords:district cooling, secondary pump system, constant pressure difference control, pump efficiency, constant pressure difference at beginning, constant pressure difference at end