用于水厂微水头发电的灯泡贯流式水轮机开发

在自来水供水过程中,存在着一些依靠水位差进行自流供水的环节。随着常规水能资源逐渐被开发殆尽,利用这部分微水头进行发电受到了关注。由于水厂工况基本不变、装置场地复杂多样等原因,常规水轮机并不适用,因此,开发新型水轮机就势在必行。结合某自来水厂安装灯泡贯流式水轮机进行发电的案例,通过传统水轮机设计理论对其进行设计,并运用计算流体动力学软件,选择SIMPLEC算法,采用基于雷诺平均N-S方程的Spalart-Allmaras湍流模型对该水轮机进行数值模拟和优化,得出在不影响水厂原有水处理工艺的前提下,在水厂安装水轮发电机组利用微水头进行发电从而达到节能减排目的的较优方案。

Development of bulb tubular turbine used in micro2waterhead hydropower generation in Water Plants

During the w ater supply process, there are some certain conduit s in w hich w ater ar e dr iven by nat ur al w ater head differ ence. With the g radual depletion o f convent ional hy dr opow er resour ces, mo re and mo re attention has been paid to the pre2 v iously neg lected micro2water head hydro pow er g eneratio n. Given t he fact that the wo rking conditio n is r elatively stable and the situat ion of the installatio n sit e is complicat ed, the conventio nal hydraulic turbines may no t be applicable, thus dev elopment of new types o f tur bines that suit the r equir ements of power g ener atio n in water plants is needed. In this paper, a bulb tubular tur2 bine w as develo ped fo r the hydro power g ener ation in a water plant. The conventio nal theor y of turbine design w as used to desig n the new t ur bine. The numerica l simulation and optimizatio n of the bulb tubula r turbine w ere per formed using t he comput at ional fluid dy namics softw ar e, the SIMPLEC a lg orithm, and the Spalart2Allmar as turbulence mo del based o n the Reynolds time2aver2 ag ed N2S equations. A better design of micro2water head hy dr opow er generation in w ater plant s w as pro po sed in or der to achiev e the g oal of energ y conservat ion and emissio n r eduction w ithout posing any t hr eat to the safety and r eliability of previous w ater treatment process.