Multi-linear performance model for hybrid (C)PVT solar collectors

Helmers, Henning; Krämer, Korbinian

doi:10.1016/j.solener.2013.03.003

Cited by 37 publications

(10 citation statements)

References 25 publications

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“…It is proved that high concentration reduces the thermal losses considerably and increases the electrical efficiency. Rely on the test bench, they developed and validated a performance model [183] for yield predictions of CPVT receivers. The linear coefficients of thermal and electrical outputs were obtained from multi-linear regression on measured data, which is similar to the quasi-dynamic method EN 12975-2: 2006 applied for solar thermal collectors.…”

Section: Parabolic/spherical Dish Concentratormentioning

confidence: 99%

A review of concentrated photovoltaic-thermal (CPVT) hybrid solar systems with waste heat recovery (WHR)

et al. 2017

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Section: Parabolic/spherical Dish Concentratormentioning

confidence: 99%

A review of concentrated photovoltaic-thermal (CPVT) hybrid solar systems with waste heat recovery (WHR)

et al. 2017

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“…In the system 4306 liter of pure water are produced whereas only 374 liter of waste water are left. The CPV-T system is designed for 14 kW p,th and 6 kW p,el and would correspondingly produce 116 kWh th and 52 kWh el during the day of the example (assuming a thermal performance curve as described in [11]). In the example, the outlet temperature at the receiver is fixed to be maximal 90 °C.…”

Section: Specific Design -Examplementioning

confidence: 99%

“…The maximum power output was achieved at a relative position of 110 mm, see Fig 3a. (a) (b) For this optimum position the thermal performance of the system is presented in Fig 4. The measurements of the thermal power of the receiver normalized to a direct normal irradiance (DNI) of 850 W/m² are shown. Using the measured data we followed a procedure as described in more detail in [10] and [11] in order to reveal a description of the thermal performance description in a theoretical and standardized manner. Therefore, a multilinear regression (equation 1) was solved for the measurement data of 12/11/2015.…”

Section: Thermal Performance Of the Cpv-t Systemmentioning

confidence: 99%

CPV-T mirror dish system combined with water desalination systems

Wiesenfarth

Went

Bösch

et al. 2016

AIP Conference Proceedings

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Abstract. In this work a combined system consisting of a CPV and thermal (CPV-T) system connected with a reverse osmosis (RO) and membrane distillation (MD) for desalination is presented. In the CPV-T electrical energy is generated. The electrical energy is partly needed to run the desalination systems (e.g. pumps). The surplus electricity can be fed into the grid or an electrical storage system. The reverse osmosis process is the most energy efficient and established way of desalting brackish water and high volumes of pure water can be reached. However, with rising salinity the specific energy consumption (SEC) of RO rises significantly. Therefore, a second desalination system is introduced, the MD. The distillation is driven by the difference in temperature and vapor pressure of two fluid cycles. Hence, in the MD the thermal energy generated in the CPV-T system is used to heat the cycle of the high temperature side. The MD process runs with low temperature heat (<100 °C) and its SEC is less sensitive to the water salinity than the RO-process. Therefore MD is suitable to achieve high brine salinity by further concentrating the brine resulting from the RO-process. The connection in series of the both desalination technologies is especially useful to treat brackish water that is often found in high DNI regions, thus match to the CPV technology very well. The scarce water resources in dry regions are of high value and should therefore be as fully used as possible. In addition, the quantity of brine that needs to be disposed of is reduced when concentrating to a high salinity.

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“…In central receiver concepts, a relatively large concentrating optic is used to focus the sunlight onto a PV receiver (like a small PV module) made of densely packed III-V Figure 4 Example of a paraboloid and a central receiver test setup as installed at the Fraunhofer ISE [54]. Here, the diameter of the concentrating mirror is 1.2 m, while the receiver has an area of 4.5 × 4.5 cm 2 consisting of four single-junction monolithically interconnected modules (MIMs) [55].…”

Section: Central Receiver Conceptsmentioning

confidence: 99%

III-V Multi-junction solar cells and concentrating photovoltaic (CPV) systems

Philipps

Bett

2014

Advanced Optical Technologies

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It has been proven that the only realistic path to practical ultra-high efficiency solar cells is the monolithic multi-junction approach, i.e., to stack pn-junctions made of different semiconductor materials on top of each other. Each sub pn-junction, i.e., sub solar cell, converts a specific part of the sun's spectrum. In this way, the energy of the sunlight photons is converted with low thermalization losses. However, largearea multi-junction solar cells are still far too expensive if applied in standard PV modules. A viable solution to solve the cost issue is to use tiny solar cells in combination with optical concentrating technology, in particular, high concentrating photovoltaics (HCPV), in which the light is concentrated over the solar cells more than 500 times. The combination of ultra-high efficient solar cells and optical concentration lead to low cost on system level and eventually to low levelized cost of electricity, today, well below 8 �cent/kWh and, in the near future, below 5 �cent/kWh. A wide variety of approaches exists for III-V multi-junction solar cells and HCPV systems. This article is intended to provide an overview about the different routes being followed.

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Multi-linear performance model for hybrid (C)PVT solar collectors

Cited by 37 publications

References 25 publications

A review of concentrated photovoltaic-thermal (CPVT) hybrid solar systems with waste heat recovery (WHR)

A review of concentrated photovoltaic-thermal (CPVT) hybrid solar systems with waste heat recovery (WHR)

CPV-T mirror dish system combined with water desalination systems

III-V Multi-junction solar cells and concentrating photovoltaic (CPV) systems

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