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S O L E X T R A TM Solar PV Park and Wind Farm projects in Bulgaria for sale !
Advanced Solar PV &
Hybrid Power Plant Design
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We are using SOLEXTRA TM as a term to describe number of innovations and know-how developed by our renewable energy holding related the field of green power generation that achieved high efficiency in the process of transformation of renewable solar power to useful electricity and/or heat. SOLEXTRA TM design approach is flexible depending on the specific conditions. A part of SOLEXTRA TM innovations are presented below. The actual amount of sunlight falling on a specific geographical location is known as insolation—or "incident solar radiation." Insolation values for a specific site are sometimes difficult to obtain. Weather stations that measure solar radiation components are located far apart and may not carry specific insolation data for a given site. We have developed a spatial measurement system (patented) and related software for high accurate calculation of on-site insulation. Using our patented system we can find the best fitted solar module that maximize PV energy yield for given site. We have developed high efficient inverter system (patent pending) that maximize PV energy yield of grid connected Solar PV Parks. Our photovoltaic related inventions, by effective artificial cooling, achieved a significant increase of the power output of the PV modules. They are parts of innovative water pumping facilities, PV-power plants, etc. Spatially for solar parks, we are developed patented solar reflector system for conventional PV-array that doubling the energy yield of solar parks. See all videos of SOLEXTRA TM patented solutions here.
Reflector augmented PV module - patent pending PROBLEM TO BE SOLVED:
To increase yearly electricity yield of PV modules in
solar parks and building integrated PV installation by providing
a photovoltaic reflection device for solar power generation for
acquiring much more power generation quantity than a conventional manner
by reflecting sunlight on the concave reflector of rays of light to
intensively emit the sunlight to a solar cell module. SOLUTION: A photovoltaic reflector is rotated by an angle of rotation so that sun can come to the extension of the reflector of the rays of light installed on a solar battery module, and mobile leg is moved by an computer controlled elevation unit at the bottom part of the module to adjust the angle of the reflector so that sunlight reflected on the reflector can be emitted to a solar cell module. ADVANTAGES: Enhancement of yearly electricity yield of non tracking PV modules by movable controlled reflector without any changes of module configurations. Low cost upgrade of existing solar PV parks and other PV installations. APPLICATIONS: For development of new solar PV projects aimed bigger electricity yield of the inclined non tracking modules and upgrading of existing solar PV parks and other PV installations. Innovative Solar Energy Converters (ISEC) The fundamental physical limitation in production of photovoltaic (PV) cells is the decrease in efficiency as the temperature of the cell increases. The main reason for this is that more than 40% of the average absorbed photon energy ends up heating the PV cell. The efficiency of photovoltaic systems strongly depends on the temperature of photovoltaic modules. As temperatures increase, the electric power output is reduced. Trough effective artificial cooling, our innovative technologies achieved an increase of the power output of the PV modules by factor up to 2. In the part of our ISEC we apply a fluid for artificial cooling of the PV modules. By cooling the temperature of the fluid is increased. In our ISEC we used several innovative approaches to convert the effect of a resulted positive temperature difference. Although 77 percent of the sun's energy has the characteristics required for use in photovoltaic systems. This does not mean that the efficiency of cells in converting solar photons to electrons is 77% ! Unfortunately, the efficiency of photovoltaic systems is affected by temperature. As temperatures increase, the output voltage produced by sunlight is reduced which then reduces the amount of energy produced. \ Passive PV cooling The collection of solar energy may adopt many forms. A currently desirable configuration is direct conversation of solar energy to electricity using semiconductor photovoltaic panels. The heart of the photovoltaic system is a thin flat layer of semiconductor material. When the semiconductor material is struck by sunlight, electrons are freed, producing an electric current. Typically, individual solar cells may be ganged together to form photovoltaic modules. Typically, about half the cost of a solar system lies with the solar cell modules, and the remainder is directed toward power conditioning, electrical wiring, installation, and site preparation. The energy conversion efficiency of solar cells decreases as the temperature of the solar cells increases. Furthermore, increasing temperature may also have detrimental effects on other components of the photovoltaic system, including thermal stress which may result in failures in the photovoltaic system. Many conventional support frames are configured to create a dead air space beneath a photovoltaic panel. Air within the dead air space provides almost no convective cooling and often retains heat. Cooling can be provided by both active and passive systems. Active cooling systems may include Rankine cycle system and absorption system, both of which require additional hardware and costs. Passive cooling systems such as convection cooling; radiative cooling; and evaporative cooling from water surfaces exposed to the atmosphere may also be used. What is needed is a passive cooling system for photovoltaic panels to minimize or eliminate dead air space and increase passive cooling. A passive convection cooling system for photovoltaic panels according to the present disclosure utilizes principals of aerodynamics to channel natural air flow across photovoltaic panels to increase the rate of heat transfer and increase the convection rate and decrease the temperature of the photovoltaic panels thereby increasing the efficiency of the solar cells and decreasing failures of the photovoltaic system. The photovoltaic cooling system comprises a generally rigid frame supporting one or more photovoltaic panels creating a lower ventilation path to increase rate of heat transfer under the photovoltaic panel to greatly increase the convection rate to effectively cool the photovoltaic system. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. Active PV cooling
PROBLEM TO BE SOLVED: To
provide a photovoltaic system capable of efficiently cooling a
photovoltaic panel by means of a heat pump device in order to keep the
generating efficiency of the panel from decreasing. Hybrid automated system for building air conditioning and electric supply (Patented) The hybrid automated system comprises a ground-connected heat pump installation (1), solar energy converter containing photovoltaic solar collector (2) and winds electricity generator (3). At the shadow side of collector (2) there is a closely adjoining radiator (4) with internal hollow ducts (5), which is connected between a distributor (6) and heat-exchanger (7) in the outer circuitry of a closed two-circuit tubular circuitry. In the inner circuit of the circuitry an earth collector (8) and heat-exchanger (7) are connected across an adjustable pump (9). In both circuitries liquid, which does not freeze at low temperatures, circulates, which by means of radiator (4) ensures cooling/heating of the photovoltaic collector (2), the electric leads of which are connected to the electric supply unit (10) of installation (1) by means of an electric distribution device (11). The latter is connected to the wind electric generator (3) and to electric storage battery (12), which is connected to an external electric network across the electric distribution device (11) and a two-way electric converter (13) of DC to AC electric power, and vice versa, and unit (10) is also coupled to an electric heater (14) in heat-exchanger (7). The system is controlled by an optimizing programmable unit (15), the inputs of which are connected to the outputs of consumed electric power sensors (16), for room temperature (17) in the premises of the building, and for the temperature of the water (18), used for residential needs, and each and every of its outputs is connected across an actuating mechanism (19), respectively, to the electric distribution device (11), by actuating mechanism (20) to the electric power supply unit (10), by an actuating mechanism to the adjustable pump (9) and by actuating mechanism (22) to the inter-circulatory distributor (6). Improving solar light efficiently by performing sun's wavelength
PROBLEM TO BE SOLVED: To
provide a photovoltaic energy utilization system capable of utilizing
solar light efficiently by performing wavelength band division of solar
light having energy distributed over a wide wavelength band during
transportation and then performing energy conversion of each wavelength
band with highest efficiency depending on the divided light. Photovoltaic solar cells efficiency
The efficiency of market
commercialized conventional photovoltaic solar cells is up to 18.5 %.
The tiny "nanocrystals," also known as "quantum dots," produce as many
as three electrons from one high energy photon of sunlight. When
conventional photovoltaic solar cells absorb a photon of sunlight, the
energy gets converted to at most one electron, and the rest is lost as
heat. The potential for solar, or photovoltaic, cells that reduce
wasteful heat and maximize the amount of the sun's energy that is
converted to electricity—a key step toward making solar energy more cost-competitive
with conventional power sources. The solar cells based on quantum dots
theoretically could convert more than 65 percent of the sun's energy
into electricity, approximately doubling the efficiency of solar cells.
The best cells today convert about 33 percent of the sun's energy into
electricity. Innovative environmental friendly PV modules and solar co-generators Thermo-photo facilities that convert solar energy to usable heat and/or electricity stopped the sun shine behind and around them. This effect significant decreased normal photosynthesis in the case of ground mounted PV installations and PV in greenhouses, as well. To avoid these problems two new inventions are developed by George Tonchev – “Linear thermo-photovoltaic generator” and “Environmental friendly solar co-generator” PV system efficiency The efficiency of market commercialized conventional PV system is up to 15 %. We are developing two main approaches to increase PV system energy yield. First of all - it is the solar tracking systems that increase PV system energy yield up to 40%. Second - reflectors and solar concentrators. And different combinations of above described approaches that increase conventional PV system energy yield up to 110%. See all videos of SOLEXTRA TM patented solutions here. Author and Inventor: George Tonchev, Ph.D. For more renewable energy innovations - see here.
Company Profile ECOWAT JSCo is a leading Bulgarian company providing all steps of wind energy and solar power engineering. ECOWAT JSCo is wholly owned by its directors and has no equity stake in any wind turbine or photovoltaic manufacturers or wind energy plant - its advice is independent and impartial. ECOWAT JSCo counts among his clients local and foreign wind energy investors and developers. Some 70% of ECOWAT turnover is generated outside the Bulgaria. Some Bulgarian municipalities are also our clients. Our solar and wind projects activities includes micro and macro sitting, environmental vision, feasibility studies, investment evaluations, technical pre-design, infrastructure and energy output analysis, geotechnical site investigations, foundation, grid connection and other civil and electrical construction activities in the fields of wind and solar power plants. ECOWAT JSCo is normally appraising several wind and solar site developments at any one time. This appraisal usually takes the form of a complete special developed 3-D wind measurements and related wind energy analysis of the measured data and reduction of that data, in conjunction with longer term reference data if it is available, to provide a detailed wind resource report – a "Wind Energy Audit". Such an audit would also always involve an inspection of the site and an investigation of the surrounding terrain. If a long-term reference station, from a National Meteorological Office and other local and foreign sources, is to be used to provide a correlation and calibration with the site wind speed. ECOWAT JSCo has developed an innovative methodology and recommendations for wind site assessments. We bring customers over 10 years in-depth experience and knowledge of Solar Energy Audit and photovoltaic power system design under own brand SolextraTM .Design services (www.solextra.eu ) combines mechanical, structural, and electrical engineering expertise with best-of-breed computer-aided design automation tools and industry-leading system layouts to deliver high-performing solar energy systems. ECOWAT JSCo has competence of the whole spectrum of wind turbine design and related know-how based on the inventions of our ECOWAT Team (www.ecowat.eu ). ECOWAT JSCo experience includes outline design and network connection studies and execution of wind and photovoltaic projects. We can assist in the tendering process by writing specifications, short listing contractors, and evaluating tenders. Often ECOWAT JSCo has been involved in this work for the entire renewable energy projects, either directly for developers or as part of a technical due-diligence review for financing organizations. In recognition of the need for strategic planning to ensure successful implementation of local, regional and national renewable energy projects and programmers, A key objective of most strategic studies is the effective targeting of investment to maximize leverage or returns.
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