All costs are taken into account, calculated at 50 yuan per watt, and the monthly electricity consumption is 300 kilowatt hours, or 300,000 watts. Given two consecutive rainy weathers, you need to install 900,000 watts to barely meet your needs. . 900,000 watts × 50 yuan = 45 million. If you actually install so many photovoltaic panels, the price will be relatively low, around 40 million.
Solar cell installation method
| Small question 1:C Small question 2:A |
| Analysis of test questions: Quick question 1: Today is the summer solstice and the sun shines directly on the Tropic of Cancer. As of 2:00 p.m., the local time of Haikou City is located northwest of Haikou. City, so the “sun chaser” solar collector panel faces northwest, choose C. Since the tilt angle of the panelssolar panels is complementary to the solar height and the solar altitude angle in Haikou city is larger than that of Tianjin city, the tilt angle of solar panels in Haikou city is smaller than that from Tianjin city. . Quiz 2: Because the tilt angle of solar panels is complementary to the height of the sun, when the tilt angle of solar panels in Tianjin reaches its maximum in one year, the height of the sun the sun is the minimum of the year. Tianjin A middle school classroom has the largest surface area exposed to sunlight. Today is the winter solstice. Option A is correct. The winter solstice is winter in the northern hemisphere. At this time, ships from Guangzhou to London sailed smoothly in the northern Indian Ocean. The Nile is in its dry season. Athens has a Mediterranean climate in the northern hemisphere and swimming beaches. are crowded with tourists in summer. |
There are mainly the following types:
1. Fixed support system (based on the longitude and latitude of the location, the shadow condition around the component to determine the tilt angle and orientation of the module)
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Due to the large number of words, the following content is copied directly from the solar energy website for reference:
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Solar photovoltaic tracking systems can be divided into two categories: single-axis tracking and dual-axis tracking according to the tracking dimensions. Single-axis tracking only tracks the azimuth angle of the sun and abandons tracking the altitude angle, so the photovoltaic modules adopt a fixed tilt angle (tilt angle). According to the different tilt angles, it can be divided into two methods: single-axis horizontal tracking and single-axis oblique tracking of tilt and latitude angle. THESingle-axis horizontal tracking uses 0. Fixed tilt, by adjusting the north-south axial angle of the photovoltaic module, the orientation of the sun is tracked in the east-west direction. The advantage of this tracking method is that it will not cause occlusion in the distance between the front and back of the photovoltaic module. the photovoltaic module array, and the same footprint is the same as that of other tracking photovoltaic modules. The system has a greater installed capacity and a higher utilization rate per unit area, but its inclination is fixed at o. , generally suitable for low-latitude areas where the sun's altitude angle is relatively large; Single-axis tracking of the oblique latitude angle also tracks only the orientation of the sun in the east-west direction, but uses a fixed tilt angle that is the same as the local latitude. Such a system can be used in spring./ Today's orientationand the time of the autumnal equinox is entirely consistent with that of the sun, which is equivalent to using the median annual change in the local solar altitude angle, taking into account both the winter and summer, so it is more suitable for mid and summer. -high latitude areas where the solar altitude angle changes significantly during the year.
The dual-axis tracking system tracks the sun's azimuth angle and altitude angle simultaneously, with greater accuracy than single-axis tracking. It has a better effect in increasing the amount of solar radiation received, but. it's also more expensive. Dual-axis tracking has two rotational degrees of freedom, which can be achieved by simultaneously adjusting the tilt angle and north-south axial angle of the photovoltaic module, or by simultaneously adjusting the tilt angle and l azimuth angle of the module. Dual-axis tracking should avoid occlusion in east-west directionsst and south-north, so that the spacing between components is large and the installed capacity per unit area is smallest. However, in areas with strong direct light, the increase in received solar radiation caused by two-axis tracking is very significant, greater than the increase in land area, and the electricity generation per unit area is the higher.
According to the working principle, the tracking system can also be divided into passive tracking and active tracking. Passive tracking uses its own program to calculate the local solar altitude and azimuth angle at that time, and adjusts the component posture accordingly to achieve the tracking goals; Active tracking uses photosensitive devices to automatically detect the orientation of the strongest irradiation source, and then adjusts the orientation of the components to achieve the tracking objectives. Su systemsSingle-axis ivi with lower accuracy requirements can use passive mode, but tracking systems with higher accuracy requirements use active mode. Generally, existing dual-axis tracking systems adopt active and passive complementary mode to prevent the active photoreceptor from misjudging the sun's position under special circumstances (such as cloudy weather).