The nature of the water source, the status of water conservation management and comments.
1. Nature of water sources: tap water, surface water, groundwater, mine water and recycled water.
2. Water Saving Management: Mainly describes water saving measures and water harvesting management system.
3. Comments: Households that capture water submit comments in writing. If no comments are given within the given time frame, this will be considered consent.
How to determine the water withdrawal for electricity production of a hydroelectric plant in wet years, normal years and dry years?
The flow rate should be selected based on the inflow of water into the mine, and the selection should be based on the depth of the mine.
Water consumption per second = N/H/K (cubic meters)
N——Producttion of hydropower plant (KW)
H— —Rated water height of hydropower plant (meter)
K——Output coefficient: 8.0 ~ 8, 5 is related to the efficiency of the unit
For example: the nominal height of a hydroelectric power station H=100 meters, when the electricity production power is 1,000 kW/hour, water consumption per second = 1,000/100/8.2 = 1.22 (cubic meters), water consumption per hour = 4,390 cubic meters and daily water consumption is 105,000 cubic meters .
Water quality factors mainly include:
1. Injection water and corrosion products of equipment and pipelines, such as iron hydroxide Fe(OH)3 and ferrous sulfide FeS, etc. Blockage caused by water, as well as blockage caused by scale (CaCO3, BaSO4, etc.) produced by water in the pipe.
2. Certain microorganisms contained in the injected water (such as sulfate bacteriaeductors, iron bacteria, etc.), in addition to their own clogging effects, their metabolites can also cause clogging.
3. Impurities such as fine mud and sand carried in the injected water block the oil layer.
4. The injected water contains unstable salts which can precipitate in the oil layer. For example, bicarbonate dissolved in the injected water can form carbonate precipitation in the oil layer due to temperature and pressure changes during the water injection process, blocking the pores of the tank and reducing the water absorption capacity of the tank.
The purpose of determining the wet year, the low water year and the normal water year is mainly to consider:
(1) During the construction period of the project, the tank must be filled with water until it reaches the required limit. The time required to produce energyelectricity according to water level;
(2) During the operation period of the tank, what is the advantage of normal energy. generation.
According to the specifications, the frequencies corresponding to wet years, dry years and normal water years are basically 25%, 50% and 75%.
When there are many years of heavy precipitation data, the precipitation amount of the corresponding frequency is determined as follows:
(1) Sort the precipitation amounts of all the years from big to small. , and get n= 1, 2, 3, 4, 5.. . . . . . precipitation;
(2) Convert each value given above to precipitation of the corresponding frequency. The calculation formula is: p=n/(i+1), and i is the number of years of data; < /p>
（3) Regress the above values on the frequency paper and connect them into a smooth curve;
(4) Use the interpolation method to findr precipitation corresponding to 25%, 50% and 75% frequency on the value of the curve.
(5) According to the formula for calculating precipitation in the area where the reservoir is located and the reservoir basin area, calculate the inflow generated when precipitation occurs at the corresponding frequency.