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The system consists of PV modules, ground-mounting systems, DC cables, DC string boxes, central inverters with transformators and systems with a fuel save controller.
The system’s design suits installation into local grid with existing fuel generator units. The fuel save controller manages the performance of fuel generators according to the grid demand and the power supply from the PV system. Fuel generators are used only if the PV system does not produce enough electricity.Example:
Price calculation of 1 MWp fuel save PV plant
|Polycrystalline modules, 250 Wp||0,59||590 000|
|PV inverter 1,0 MW with fuel save controller||0,16||160 000|
|DC cables, DC string boxes||0,13||30 000|
|Free standing construction||0,18||180 000|
|Engineering, project||0,02||20 000|
|Fuel save controller system||0,06||60 000|
|Total turnkey solution||1,10||1 100 000|
|Energy yield:||1 500 - 2 000 MWh/year|
|System guarantee:||3 years|
|Modul power guarantee:||minimum 90% output in 12 years|
|minimum 80% output in 25 years|
In many regions of the world, power grids are either inadequate or nonexistent. As a result, industrial consumers often ensure their power supply through diesel gensets. Five hundred gigawatts of power from diesel genset provide industrial companies with electricity worldwide. However, fuel costs for the gensets continue to rise. The price for one liter of diesel has already exceeded one US dollar.
In addition, if the fuel has to be transported to remote regions, the effective costs increase even more as a result of the necessary storage. At the same time, PV system costs have dropped by more than 50 percent within the last three years: Solar power is often the most economical alternative energy source for remote regions in the world’s sun belt. It simply makes sense to combine PV and diesel systems so that solar irradiation – which is both abundant and free – can profitably be used as an energy source in industrial applications.
In November 2012, the first off-grid photovoltaic diesel hybrid system in the megawatts went into operation in Thabazimbi, South Africa. Using the Fuel Save Solution, the system complements the existing diesel energy supply with solar energy. The operator can save up to 450,000 liters of diesel per year and significantly reduce CO2 emissions. But how does that work? And what exactly is a photovoltaic diesel hybrid system?
A “hybrid” is something that is formed by combining two kinds of components that produce the same or similar results. A photovoltaic diesel hybrid system ordinarily consists of a PV system, diesel gensets and intelligent management to ensure that the amount of solar energy fed into the system exactly matches the demand at that time.
Basically, the PV system complements the diesel gensets. It can supply additional energy when loads are high or relieve the genset to minimize its fuel consumption. In the future, excess energy could optionally be stored in batteries, making it possible for the hybrid system to use more solar power even at night. Intelligent management of various system components ensures optimal fuel economy and minimizes CO2 emissions.
In contrast to power supply systems using diesel gensets, and despite their higher initial cost, PV systems can be amortized in as little as four to five years, depending on the site and system size, and they have low operating costs.
In addition, PV systems are flexible and can be expanded on a modular basis as the energy demand grows. Compared to pure gensets systems, a photovoltaic diesel hybrid system provides numerous advantages:
VONSCH’s solution for photovoltaic diesel hybrid system technology is the VONSCH Fuel Save Solution. The information provided below explains how it works and you can learn other interesting facts.
For industrial large-scale loads in remote regions, complementing diesel gensets with photovoltaics is the ideal solution under the following conditions:
Photovoltaic diesel hybrid systems can be amortized especially quickly in sunny regions, with little or no grid access. VONSCH system technology maximizes the use of solar energy in combination with diesel aggregates. For industries such as mining; raw material processing; agricultural companies such as flower farms and water desalinization systems and tourism facilities with a high energy demand low power generation costs, quick operational readiness, maximum reliability and availability are fundamental. The environmental benefits are also convincing: CO2 emissions and noise pollution are significantly reduced, minimizing the environmental impact. Environmentally friendly and cost-effective? Yes, we can do that.
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