Solar heating and radiative cooling using a solar collector-sky radiator with a spectrally selective surface

Matsuta, Morihiro; Terada, Shigeo; Ito, Hiroaki

doi:10.1016/s0038-092x(87)80026-9

Cited by 57 publications

(32 citation statements)

References 2 publications

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“…The thinner the thickness of the PET film is, the closer the spectral properties of the TPET composite surface will be to the ideal surface for both solar heating and radiative cooling. In this paper, the thickness of the PET film is 30 m, which is not thin enough compared to that of some other researches [2,18]. In further studies, we will work on better ways such as finding more specialized equipment or technologies to lower the thickness of the PET film.…”

Section: Trial-manufacturing Spectralmentioning

confidence: 90%

“…Meanwhile, a flat-plate solar collector cannot act as a nocturnal cooling radiator because of its extremely low emissivity in the atmospheric window wavelength (i.e., 8∼ 13 m). In several decades, there has been little work reported on solar heating and nocturnal cooling using the same surface except for the original research by Matsuta et al [18]. They presented a kind of collective-radiative surface made of a black copper plate, coated with a thin polyvinyl-difluoride film which can act as a solar collector at daytime and sky radiator at night.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical and Experimental Study of Spectral Selectivity Surface for Both Solar Heating and Radiative Cooling

Pei

et al. 2015

International Journal of Photoenergy

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A spectral selectivity surface for both solar heating and radiative cooling was proposed. It has a high spectral absorptivity (emissivity) in the solar radiation band and atmospheric window band (i.e., 0.2∼3 m and 8∼13 m), as well as a low absorptivity (emissivity) in other bands aside from the solar radiation and atmospheric window wavelengths (i.e., 3∼8 m or above 13 m). A type of composite surface sample was trial-manufactured combining titanium-based solar selective absorbing coating with polyethylene terephthalate (TPET). Sample tests showed that the TPET composite surface has clear spectral selectivity in the spectra of solar heating and radiation cooling wavelengths. The equilibrium temperatures of the TPET surface under different sky conditions or different inclination angles of surface were tested at both day and night. Numerical analysis and comparisons among the TPET composite surface and three other typical surfaces were also performed. These comparisons indicated that the TPET composite surface had a relative heat efficiency of 76.8% of that of the conventional solar heating surface and a relative temperature difference of 75.0% of that of the conventional radiative cooling surface, with little difference in cooling power.

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Section: Trial-manufacturing Spectralmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Study of Spectral Selectivity Surface for Both Solar Heating and Radiative Cooling

Pei

et al. 2015

International Journal of Photoenergy

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“…This concept produces heat and cold in the same manner as two separated devices would do. Similar devices already tested in the literature were designed to produce either heat or cold and, without any modification of the original device, the other service was studied ,,. The RCE concept is conceived since the beginning to produce both.…”

Section: The Rce Conceptmentioning

confidence: 99%

“…Similar devices already tested in the literature were designed to produce either heat or cold and, without any modification of the original device, the other service was studied. [11,20,21] The RCE concept is conceived since the beginning to produce both. This commitment entails the use of some strategies in the design of it to allow the generation of such different energy products.…”

Section: The Rce Conceptmentioning

confidence: 99%

Energy Savings Potential of a Novel Radiative Cooling and Solar Thermal Collection Concept in Buildings for Various World Climates

2018

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A novel radiative cooling and solar collection concept is presented, and the combination of these two technologies and its energy integration in residential and commercial buildings is evaluated. This innovative concept, herein named Radiative Collector and Emitter (RCE), allows for supplying both cooling and Domestic Hot Water (DHW) demands. First, the RCE concept is introduced by presenting its background, with special attention to the overlapping and switching between radiative cooling and solar thermal collection. Then the DHW and cooling demands for four building typologies, two residential and two commercial, are compared with the energy production of the RCE. The analysis is performed for representative cities of the world climates according to Köppen‐Geiger classification. The RCE concept showed suitability in some of the studied cities (San Francisco, Cape Town, Johannesburg, London, and Ottawa) with C (temperate) and D (continental) climates in residential and tertiary buildings.

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“…The intensity profile is ruled by Planck's law; the spectrum is broad in the large-wavelength range because of spontaneous emission and incoherent radiation. Thermal radiation is an important factor in energy systems such as a sky radiator (1) and thermophotovoltaic generation system (2) (3) . In these systems, if the radiation spectrum is intense only within a specific wavelength range, the radiation energy can be utilized more efficiently.…”

Section: Introductionmentioning

confidence: 99%

Thermal Radiation Control by Surface Gratings as an Advanced Cooling System for Electronic Devices

Shimizu

Yugami

2011

JTST

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Recently, the spectral properties of thermal radiation have been controlled by surface gratings having a size in the optical wavelength range, and this technique has been applied to improve the efficiency of energy systems, e.g., thermophotovoltaic generators and sky radiators. In this paper, the technique was applied to an advanced cooling system for electronic devices. In general, electronic devices are packaged in resin to protect them from damage; however, resin prevents heat from escaping from the package because of resin's strong absorption of thermal radiation in the infrared range and low thermal conductivity. By controlling the spectral property of thermal radiation from electronic devices, the thermal radiation absorbed by resin can be decreased. As a result, a cooling system for electronic devices is possible. At first, we performed a numerical simulation to design the optimal surface gratings to cool electronic devices packaged in epoxy resin. The surface gratings were fabricated using a MEMS process. The performance of the fabricated emitter was evaluated experimentally. In conclusion, we confirmed that this new cooling technique will be effective for electronic devices.

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Solar heating and radiative cooling using a solar collector-sky radiator with a spectrally selective surface

Cited by 57 publications

References 2 publications

Theoretical and Experimental Study of Spectral Selectivity Surface for Both Solar Heating and Radiative Cooling

Theoretical and Experimental Study of Spectral Selectivity Surface for Both Solar Heating and Radiative Cooling

Energy Savings Potential of a Novel Radiative Cooling and Solar Thermal Collection Concept in Buildings for Various World Climates

Thermal Radiation Control by Surface Gratings as an Advanced Cooling System for Electronic Devices

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