Analysis of a hybrid solar window for building integration

Tejas Ulavi; Tim Hebrink; Jane H Davidson

doi:10.1016/j.solener.2014.03.006

Analysis of a hybrid solar window for building integration

Tejas Ulavi, Tim Hebrink, Jane H Davidson

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

The technical performance of a hybrid 'solar window' that provides heating in addition to daylighting is evaluated. A wavelength selective film is coupled with a compound parabolic concentrator (CPC) to reflect and concentrate the infrared portion of the solar spectrum onto a tubular absorber while transmitting the visible portion of the spectrum into the interior space. The optical performance of the CPC/selective film is predicted using a Monte Carlo Ray-Tracing model. An adaptive concentrator geometry based on asymmetrical truncation of CPCs is analyzed for vertical windows and horizontal skylights. The predicted visible transmittance is 0.66-0.73 for single glazed windows and 0.61-0.67 for double glazed windows. The solar heat gain coefficient and the U-factor are comparable to existing glazing technology. The annual thermal efficiency for double glazed windows/skylights based on use in Minneapolis, MN is 24-26%.

Original language	English (US)
Pages (from-to)	290-302
Number of pages	13
Journal	Solar Energy
Volume	105
DOIs	https://doi.org/10.1016/j.solener.2014.03.006
State	Published - Jul 2014

Keywords

Building integration
Hybrid
Solar window
Wavelength selective film

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.solener.2014.03.006

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abstract = "The technical performance of a hybrid 'solar window' that provides heating in addition to daylighting is evaluated. A wavelength selective film is coupled with a compound parabolic concentrator (CPC) to reflect and concentrate the infrared portion of the solar spectrum onto a tubular absorber while transmitting the visible portion of the spectrum into the interior space. The optical performance of the CPC/selective film is predicted using a Monte Carlo Ray-Tracing model. An adaptive concentrator geometry based on asymmetrical truncation of CPCs is analyzed for vertical windows and horizontal skylights. The predicted visible transmittance is 0.66-0.73 for single glazed windows and 0.61-0.67 for double glazed windows. The solar heat gain coefficient and the U-factor are comparable to existing glazing technology. The annual thermal efficiency for double glazed windows/skylights based on use in Minneapolis, MN is 24-26%.",

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AU - Hebrink, Tim

AU - Davidson, Jane H

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AB - The technical performance of a hybrid 'solar window' that provides heating in addition to daylighting is evaluated. A wavelength selective film is coupled with a compound parabolic concentrator (CPC) to reflect and concentrate the infrared portion of the solar spectrum onto a tubular absorber while transmitting the visible portion of the spectrum into the interior space. The optical performance of the CPC/selective film is predicted using a Monte Carlo Ray-Tracing model. An adaptive concentrator geometry based on asymmetrical truncation of CPCs is analyzed for vertical windows and horizontal skylights. The predicted visible transmittance is 0.66-0.73 for single glazed windows and 0.61-0.67 for double glazed windows. The solar heat gain coefficient and the U-factor are comparable to existing glazing technology. The annual thermal efficiency for double glazed windows/skylights based on use in Minneapolis, MN is 24-26%.

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KW - Solar window

KW - Wavelength selective film

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Analysis of a hybrid solar window for building integration

Abstract

Keywords

UN SDGs

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