基于排雨管道的雨水分段蓄能发电系统  

Rainwater storage power generating system based on drainage pipeline

作　　者：于佳鑫 杨昊晟 王文娥[1] 李炳辉 杨坤 YU Jiaxin;YANG Haosheng;WANG Wen'e;LI Binghui;YANG Kun(College of Water Resources and Architectural Engineering,North-West A &F University,Yangling,Shaanxi 712100)

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100

出　　处：《水力发电学报》2018年第12期102-111,共10页Journal of Hydroelectric Engineering

基　　金：国家级大学生创新创业训练项目(201610712048);"十三五"国家重点研发计划项目(2016YFC0400203);公益性行业(农业)科研专项(201503125)

摘　　要：为充分利用汇集在建筑物顶部雨水所具有的势能,设计了由弃流净化装置和蓄水发电装置组成的雨水分段蓄能发电系统。基于虹吸原理,具有将排雨管中的雨水先蓄后放、蓄能发电的功效;依据伯努利方程建立了虹吸管内雨水的瞬时流速、流量、功率和流经时间与水头的函数关系;以最大瞬时功率为目标函数、最大真空值为约束条件,对η型虹吸管几何参数进行优化分析,筛选出19组高度尺寸组合,再以单位长度内一次蓄放水发电产生的能量最多为优化目标,确定最佳组合为(4.5,6.0)。通过物理模型实验,证明雨水蓄能发电系统能达到设计要求,并建立了该系统单个蓄水发电装置一次蓄、放过程的发电量公式。论文研究的内容及研制的实验装置对于利用雨水蓄能发电的进一步研究具有一定的指导意义。This paper presents a rainwater storage power generating system comprised of a split-flow and purification device and an impounding and generating unit, which is designed to make full use of the potential energy of rainwater collected on building roof. Designed by the siphon principle, it is capable of impounding rainwater in a drainage pipeline, then releasing it to generate power. In analysis of this system, Bernoulli equation is applied to deriving the analytical relationships of its instantaneous velocity, flux, power and time versus water head, and the design is optimized using its instantaneous peak power as the objective function and its peak vacuum as the constraint. We optimize and analyze the geometrical parameters of its siphon η-tube, select 19 sets of tube height parameters first, and then determine the best set of parameter combination(4.5, 6.0) via maximizing the power that is generated through one releasing operation of the water into a unit length of the pipeline. We conduct prototype experimental tests, verify that our power generating system meets design specifications, and develop a formula of the system’s power generation during one cycle of rainwater impounding and releasing. The results of this study, particularly the device and experimental facility, are helpful to rainwater use and further studies on rainwater power generation.

关 键 词：水力学 虹吸原理 水头 真空度 实验验证 

分 类 号：TV13[水利工程—水力学及河流动力学]