plans to launch in the Luhansk region in Anthracite solar power plant 45 kW. As you know, this project to fruition and ...
The network is full of pictures of this object, and some of which prompted me to write this note. By studying the specific features of solar power, I noticed some oddities associated with the construction of metal poles and placing solar panels on them.
As can be seen, the solar modules are located under a large and obviously not the best angle and the distance between the rows such that the low sun ( morning, evening, in the winter ), rear ranks will be significantly shaded front. Obviously, this is not the most rational distribution of.
To make sure your hunch, I turned to the experts the technical department of the company. Rentehno. Who already have practical experience in the design and construction. solar power. Currently, the company Rentehno designed several solar power plants with total capacity of 14 MW, installed equipment to Ukraine by 2.07 MW and commissioned generating capacity of 570 kW. In addition, the company's portfolio of about 20 MW to be built and commissioned before the end of 2012. So, according to experts Rentehno I tend to trust:).
At my request, using special software have been modeled several options for solar power output of 45 kW in Anthracite. We compared two versions of the actual built project (modules are arranged at an angle of 45 or 60 degrees, the distance between the middle rows of solar modules is 4 meters) and the three options proposed by Rentehno. They proposed to place the solar modules at an angle corresponding to the summer (30 degrees), the annual average (36 degrees) and winter (60 degrees) optimum. The distance between rows to minimize shading of 7 meters, 7.7 meters and 9 meters respectively. As you can see the average winter and angles are close to those used in the project, but the distance between rows is almost twice as much to minimize the direct and diffuse shading of solar modules, vperedistoyaschego metal structures.
According to the results of modeling solar power, the following parameters:.
Modules are 45-degree angle with the distance between rows 4 meters (real case) - the specific performance of solar power is 970 kWh / kW (peak ) per year with a coefficient of conversion of 70%.
Modules are at an angle of 60 degrees with a distance between rows 4 meters (real case) - the specific performance of solar power of 870 kWh / kW (peak ) per year with a coefficient of conversion of 66.5%.
Modules are 30-degree angle with the distance between the rows of 7.7 meters ( years optimum) - specific performance of solar power is 1120 kWh / kW (peak ) per year with a coefficient of conversion of 80.5%.
Modules are at an angle of 36 degrees with a distance between the rows of 7 meters (average optimum) - specific performance of a solar power station is 1115 kWh / kW (peak ) per year with a coefficient of conversion of 80%.
Modules are at an angle of 60 degrees with a distance between rows 9 meters (winter optimum) - specific performance of a solar power station is 995 kWh / kW (peak ) per year with a coefficient of conversion of 76.5%.
As can be seen from the above data, the use of a smaller angle and greater distance between rows significantly improves parameters of solar power. If the numbers go from dry to money, the difference between the specific performance in 1120 and 970 kWh / kW (peak ) per year corresponds to 34.1 thousand. UAH rate for 5.05 USD per kWh. That is over 7 years (typical payback period of solar power ) losses due to suboptimal placement of solar panels make up 238.5 thousand. UAH, and for 20 years ( rounded to the life of a solar power station on the ... USD.
The losses were calculated on the basis that the solar modules throughout the year are under the same angle. In this particular project is theoretically the angle of modules can be changed twice a year. But judging by the pictures that we have, in practice it will be difficult to achieve this:.
To be fair, that when manually changing the angle of solar modules with a ... But this is true only if a minimum number of shading one another. But analysis showed that the actual distance between the rows of about 4 meters will still be lost, t. e. owner of the plant will always receive less income. Moreover, the high-power solar power, I do not believe in the reality of a manual tilting, (think about the weight of a number of solar panels and the supporting metal ). And the use of Automation ( trackers ) further increases the cost and increases the power consumption of its own way of ...
Of course, the above calculations and reflections are only an approximate model of the real solar power. But even they show that a more serious approach to. design. and. Building your solar power plant. Than later for several years to receive less income, which for the time of return commensurate with the cost of facility design.
P. S. Price delays in starting solar power.
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