High transmittance, low emissivity glass covers for flat plate collectors: Applications and performance

Giovannetti, Federico; Föste, Sebastian; Ehrmann, Nicole; Rockendorf, Gunter

doi:10.1016/j.solener.2013.10.006

Cited by 77 publications

(30 citation statements)

References 10 publications

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“…k cutoff (4) where a k is the spectral absorptivity, Q k is the spectral solar irradiance, E k,T is the spectral emissive power for surface temperature T, and e k is the spectral emissivity of the surface. The performance of solar thermal collectors can be enhanced by the following ways: (a) increasing the solar selectivity of the absorber [67,71], (b) reducing the thermal losses from the collector [72][73][74][75], and (c) increasing the heat transfer coefficient between the absorber surface and the working fluid (water, oil, molten salts, etc.) [76,77].…”

Section: Active Photovoltaicmentioning

confidence: 99%

“…An ideal solar selective glass should fulfill the following requirements: high value of solar transmittance, economical cost, long-term chemical stability, and heat trapping capability [74]. In order to significantly reduce the thermal losses, heat trapping capability is a must and it can be achieved by applying a selective coating over the glass surface, which reflects the most in the IR spectral region.…”

Section: Advances In Solar Receiversmentioning

confidence: 99%

“…Giovannetti et al [74] examined the potential of innovative collector design with a glazing coating having high solar transmittance and low emissivity properties. It uses suitable active materials like metals (Ag, Au, Cu, etc.)…”

Section: Advances In Solar Receiversmentioning

confidence: 99%

See 2 more Smart Citations

Technological Advances to Maximize Solar Collector Energy Output: A Review

Salvi

Bhalla

Taylor

et al. 2018

Journal of Electronic Packaging

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Since it is highly correlated with quality of life, the demand for energy continues to increase as the global population grows and modernizes. Although there has been significant impetus to move away from reliance on fossil fuels for decades (e.g., localized pollution and climate change), solar energy has only recently taken on a non-negligible role in the global production of energy. The photovoltaics (PV) industry has many of the same electronics packaging challenges as the semiconductor industry, because in both cases, high temperatures lead to lowering of the system performance. Also, there are several technologies, which can harvest solar energy solely as heat. Advances in these technologies (e.g., solar selective coatings, design optimizations, and improvement in materials) have also kept the solar thermal market growing in recent years (albeit not nearly as rapidly as PV). This paper presents a review on how heat is managed in solar thermal and PV systems, with a focus on the recent developments for technologies, which can harvest heat to meet global energy demands. It also briefs about possible ways to resolve the challenges or difficulties existing in solar collectors like solar selectivity, thermal stability, etc. As a key enabling technology for reducing radiation heat losses in these devices, the focus of this paper is to discuss the ongoing advances in solar selective coatings and working fluids, which could potentially be used in tandem to filter out or recover the heat that is wasted from PVs. Among the reviewed solar selective coatings, recent advances in selective coating categories like dielectric-metal-dielectric (DMD), multilayered, and cermet-based coatings are considered. In addition, the effects of characteristic changes in glazing, absorber geometry, and solar tracking systems on the performance of solar collectors are also reviewed. A discussion of how these fundamental technological advances could be incorporated with PVs is included as well.

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Section: Active Photovoltaicmentioning

confidence: 99%

Section: Advances In Solar Receiversmentioning

confidence: 99%

See 1 more Smart Citation

Technological Advances to Maximize Solar Collector Energy Output: A Review

Salvi

Bhalla

Taylor

et al. 2018

Journal of Electronic Packaging

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“…Main effort should be concentrated on optimized low-e coating with high solar transmittance but low emissivity for near infrared region. Such coatings with transmittance 86% and emissivity 30% are already in the market and will be used further for the final glazed PVT concept [10]. Thermal efficiency for the new glazed selective PVT collector has been modelled with a detailed glazed PVT model [11].…”

Section: Glazed Pvt Collector Concept With Polysiloxane Encapsulationmentioning

confidence: 99%

Glazed PVT Collector with Polysiloxane Encapsulation of PV Cells: Performance and Economic Analysis

Matuška

Šourek

Jirka

et al. 2015

International Journal of Photoenergy

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Development of a new concept of glazed PVT collector based on temperature resistant polysiloxane encapsulation material is presented together with the results from experimental testing and modelling. Performance and economic analysis in 4 different European climates has been done to derive the competitive price of the PVT collector concepts with main focus on the glazed PVT collector under development. Results have shown that specific market price 400 to 500 EUR/m2for the glazed PVT collector should not be exceeded in order to become competitive with conventional combination of photothermal and photovoltaic collectors.

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“…12.3% in U.S.) is consumed in heating and cooling for buildings 5 . For energy saving, an efficient method is to apply low-emissivity (low-e) materials at the surfaces of buildings 6–9 . For instance, aluminum foil phenolic foam boards and low-e glass can be mounted on the outer walls of buildings and windows, respectively.…”

Section: Introductionmentioning

confidence: 99%

Achieving low-emissivity materials with high transmission for broadband radio-frequency signals

Liu

Chang

et al. 2017

Sci Rep

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The use of low-emissivity (low-e) materials in modern buildings is an extremely efficient way to save energy. However, such materials are coated by metallic films, which can strongly block radio-frequency signals and prevent indoor-outdoor wireless communication. Here, we demonstrate that, when specially-designed metallic metasurfaces are covered on them, the low-e materials can remain low emissivity for thermal radiation and allow very high transmission for a broad band of radio-frequency signals. It is found that the application of air-connected metasurfaces with subwavelength periods is critical to the observed high transmission. Such effects disappear if periods are comparable to wavelengths or metal-connected structures are utilized. The conclusion is supported by both simulations and experiments. Advantages such as easy to process, low cost, large-area fabrication and design versatility of the metasurface make it a promising candidate to solve the indoor outdoor communication problem.

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High transmittance, low emissivity glass covers for flat plate collectors: Applications and performance

Cited by 77 publications

References 10 publications

Technological Advances to Maximize Solar Collector Energy Output: A Review

Technological Advances to Maximize Solar Collector Energy Output: A Review

Glazed PVT Collector with Polysiloxane Encapsulation of PV Cells: Performance and Economic Analysis

Achieving low-emissivity materials with high transmission for broadband radio-frequency signals

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