power generation with rainwater in residential areas located near by mountains

1、<p>　　Power generation with rainwater in residential areas located near by mountains</p><p>　　Abstract. With the purpose of taking full advantage of rainwater, the concept “power generation with rainwat

2、er in communities close to mountains” is proposed. A rainwater generating system is designed. According to an application of this system, using the water in diversion canal to generate power supplied for this very commun

3、ity, what changes the community’s electricity power from completely rely on outside supply into partial self-sufficiency. The whole power generation process is not only con</p><p>　　Key words: Residential ar

4、eas；Power generation；Rainwater Green hydropower；Resource utilization </p><p>　　1. Introduction </p><p>　　Rainwater has been utilized for about a thousand years. In Germany [1], it is mainly used

5、 in rainwater harvesting and utilization systems, roof garden rainwater utilization system, intercepting pollution and infiltration systems, ecological community rainwater utilization systems, etc. The rainwater using te

6、chnology of Germany has reached world leading level. Rainwater is often used for improving natural water infiltration capacity in America, such as underground reinjection system and surface r</p><p>　　The hu

7、mid subtropical monsoon climate of Chongqing brings abundant rainfall with 1000~1400mm annually. The rainfall data from 1976 to 1980 in Table1 is collected by Cuntan hydrometric station which is on Yangtze River shows th

8、at during the rainy season which is from May to September, rainstorm happens frequently and the rainfall is heavy, result in runoff yield particularly quick and large, while it is relatively small in winter. In Chongqing

9、 plenty of residential districts are built close to th</p><p>　　2.1 Basic principle </p><p>　　"Power generation with rainwater in residential areas located close to mountains" is mainl

10、y for the residential areas in urban, so the power generation is micro hydro power, the principle of which is the same as large hydro power that is the generator is driven by water turbine to produce electricity. Power c

11、an be calculated according to hydraulic head and flow. </p><p>　　2.2 Practical value </p><p>　　On the one hand, compared with the traditional residential areas located close to mountains, the pr

12、oposed rainwater power generation system is to install a certain number of low-head turbines at appropriate sites to generate electricity with water in canal for the residential use directly, so that the electricity cons

13、umption of this community could be changed from completely rely on the power supply into partial self-sufficiency. The whole generation process is green. This system both take full </p><p>　　On the other sid

14、e, this system with simple and practical technology is easy to construct and maintenance and quite suitable for popularization. Further more it can be used in relieving the current power supply tension, to a certain exte

15、nt. The cost in the whole design scheme is low which mainly includes hydroelectric generating set, battery, and electric wire, etc. While the power generated by this system can obtain substantial value, which result in a

16、 quite fast capital recovery. As a consequen</p><p>　　3. Project case </p><p>　　The case of a residential area in Xuefu road, Nan’an district in Chongqing has been studied, relevant parameters o

17、f this residential area as shown in Table 2. </p><p>　　3.1 Flow calculation </p><p>　　The runoff producing is calculated by UBC WATERSHED MODEL, which is a software used commonly in hydraulic en

18、gineering to get runoff of outlet section in some basin caused by rainfall, etc. The results can be obtained by inputting rainfall data (Fig. 1) and parameters (Table 2) into the software and run it, as shown in Table 3

19、</p><p>　　Table3. The results </p><p>　　The comparison curves among 1976 to 1980 as shown in Fig. 2 </p><p>　　The above curves indicate that the runoff is greater than or equal to 0

20、.02m3 during most of the year. 　　3.2 Generating equipment </p><p>　　In consideration of the current and the actual flow in this residential district, the design chooses 600w volute axial flow turbine genera

21、tor with low head and low flow. This kind of turbine generator demands the hydraulic head is between 0.8m and 10.0 m generally, the flow between 0.017m3/s to 1.66m3/s, which is very suitable for this design. Since it is

22、small power generation, single-phase generator is adequate. </p><p>　　3.3 Installation and working principle </p><p>　　First of all, plan a proper site to install the equipments. The inflow syst

23、em consist of a intake channel, a water lock, and slide plate to ward off garbage, made of concrete and stone, plank or iron plate, wire netting, respectively. A spiral water intake should be made to get vortex flow to d

24、rive the vane wheel rotating. A trumpet type draft tube is needed to make the inside water produce suction which draws the wheel downward and then a powerful motivation is formed to drive the generator wor</p><

25、;p>　　3.4 Power generation </p><p>　　Based on the above calculation, runoff is greater than or equal to 0.02m3 during most of the year. Considering the physical condition as geography, drainage channel, et

26、c. in the residential area, we finally determined to install seven electric generators; the generating capacity of each is 600w. So the total power generated in a year is: </p><p>　　3.5 Storage battery </

27、p><p>　　As generators working day and night, and the generated power is not used immediately after it’s produced, besides, there is a remarkable seasonal change in flow, which could cause a disproportion in gen

28、erating capacity, that is , the power is small during a period of time , while it’s quite opposite during another period of time. So, storage battery is used to store spare power so that it can be utilized in some time.

29、After overall consideration, three fixed type of batteries are used in this de</p><p>　　4. Conclusions </p><p>　　Firstly, the concept of “power generation with rainwater in residential areas loc

30、ated close to mountains” is put forward, according to which, a generating system with rainwater is designed. With this system, the rainwater can be used for power generation and supply, which makes the residential area c

31、ould self-supporting partial electric power. It’s obviously that the system proposed in this paper will be beneficial to improve the present situation of lack hydroelectric resource. Especially under</p><p>

32、　　References </p><p>　　[1] J. Q. Li, W. Che. Investigation and analysis on rainwater utilization technology of Germany. Urban environment & urban ecology, 2002, 1 (9): 47- 49. </p><p>　　[2]

33、Y. M. Wang. Research on urban rainwater utilization both domestic and overseas. Journal of Anhui agriculture science, 2007, 35(8): 2384-2385. </p><p>　　[3] J. Q. Li, W. Che. Urban rainwater utilization and w

34、ater conversation. City and town water supply, 2001, (2): 39 - 41. </p><p>　　[4] W. Luan, D. S. Tang. Research on the comprehensive utilization of urban rainwater resources. Zhi Huai, 2005, (1):78-80. </p

35、><p>　　[5] K Lin, Y Zhao, W. G. Zheng. The application of the technology about electricity generation with rainwater. Power supply technologies and applications, 2013, 16(1.2). </p><p>　　[6] Y .CH.