Low emittance coatings and the thermal performance of vacuum glazing

Fang, Yueping; Eames, Philip C.; Norton, Brian; Hyde, Trevor; Zhao, Junfu; Wang, Jinlei; Huang, Ye

doi:10.1016/j.solener.2006.06.011

Cited by 59 publications

(27 citation statements)

References 8 publications

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“…vacuum glazing, provides high thermal resistance. Though vacuum glazing provides a significant improvement in heat loss reduction, they will still benefit greatly from the adding of a low-e coating (Eames [12], Fang et al [16]). …”

Section: Vacuum Glazingmentioning

confidence: 99%

Low-emissivity materials for building applications: A state-of-the-art review and future research perspectives

Jelle

Kalnæs

Gao

2015

Energy and Buildings

228

100

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Low-emissivity (low-e) materials can be used in order to reduce energy usage in both opaque and transparent areas of a building. The main focus for low-e materials is to reduce the heat transfer through thermal radiation. Furthermore, low-e materials will also influence on the daylight and total solar radiation energy throughput in windows, the latter one often characterized as the solar heat gain coefficient (SHGC). This work reviews low-e materials and products found on the market, and their possible implementations and benefits when used in buildings. The SHGC is often left out by many countries in energy labellings of windows. With opaque materials, research is still ongoing to correctly calculate the effect with regard to thermal performance when applied in buildings. Future research perspectives on where low-e technologies may develop are explored. To the authors' knowledge, there seems to be little available literature on how ageing affects low-e materials and products. As this is of large significance when calculating energy usage over the lifetime of a building, ageing effects of low-e materials should be addressed by manufacturers and the scientific community.

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Section: Vacuum Glazingmentioning

confidence: 99%

Low-emissivity materials for building applications: A state-of-the-art review and future research perspectives

Jelle

Kalnæs

Gao

2015

Energy and Buildings

228

100

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“…As the performance comparison had a low-e coating glazing (double glazing and triple glazing) and vacuum glazing, from Figure 6, the U-value of the vacuum glazing was lower by 4-55% than double glazing. Fang et al [14] have already confirmed that the use of single high performance low-emittance coating in a vacuum glazing provides excellent performance. However, in the case of double vacuum glazing under a 40 mm pillar interval, the U-value did not decrease more than triple glazing.…”

Section: Change In Performance Through Different Components Of Vacuummentioning

confidence: 90%

Analysis of the Performance of Vacuum Glazing in Office Buildings in Korea: Simulation and Experimental Studies

Cho

Kim

2017

Sustainability

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Abstract:Window performance in buildings is very important for energy saving. Many efforts have been made towards saving energy in buildings, and research has focused attention on enhancing the thermal performance of windows. Vacuum glazing has attracted much interest as a means of enhancing the thermal performance of windows by strengthening insulation performance. However, the performance of vacuum glazing differs based on various component combinations, therefore, further study on vacuum glazing is needed. In this paper, through simulations, the authors confirmed the heat transfer value (U-value) of the vacuum glazing composed of various combinations (glass type, number of layers, interval of pillar, etc.). A physical test of vacuum glazing was also performed using standard test methods of windows and the U-value of the vacuum glazing by various intervals of the pillar position was confirmed. The simulation revealed a U-value for vacuum glazing of 0.682-1.466 W/m 2 ·K as per the interval of the pillar position, the performance of solar heat gain, and visible light transmission. The U-value of the double vacuum glazing was calculated as 0.607-1.154 W/m 2 ·K and was similar regardless of the interval of pillar position, the performance of solar heat gain, and visible light transmission. Based on the results of the energy simulation, in the case of a used low U-value of vacuum glazing, the heating and cooling energy consumption in buildings decreased by 2.46%, than when low-e glass and argon gas filled layers were used in windows. Furthermore, in double vacuum glazing, the heating and cooling energy consumption in buildings decreased by 3.91%.

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“…A well-known use of low-E coatings is in 'vacuum glazing', which has been researched extensively during the last several years [8][9][10][11]. These consist of two of more sheets of low-E coated glass that have been separated support pillars [12], as shown in Figure 7.4 [13]. The edges of the glass are then sealed hermetically together and a high and stable vacuum is produced in between the films [11].…”

Section: Thin Films For Window Glazing: Static Propertiesmentioning

confidence: 99%

“…The first successful method for producing vacuum glazing was done in 1989 [12], however this used a contiguous solder glass edge seal that could only be formed at temperatures exceeding 450°C. This was problematic because at such temperatures tempered glass and many soft low-E coatings begin to degrade.…”

Section: Thin Films For Window Glazing: Static Propertiesmentioning

confidence: 99%

Thermochromic Thin Films and Nanocomposites for Smart Glazing

Binions

2012

Intelligent Nanomaterials

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Solid-state thermochromic materials undergo semiconductor to metal transitions at a critical temperature, Γ. This chapter begins by describing the phenomenon of thermochromism, whereby the optical properties of a material change reversibly as a result of a change in temperature. The different types of thermochromism will be introduced with a focus on the thermochromism exhibited by solid-state materials. Also presented are the fundamental chemical principles that describe the electronic structure and properties of solids, and the chronological developments in the theory behind the thermochromic transitions that lead to the discovery of the semiconductor-to-metal transition. The focus is on vanadium dioxide, V0 2 , because its critical temperature is closest to room temperature, so it is a valuable material for potential application in thermochromic glazing. The possibility of fine-tuning this transition temperature involves introducing various dopants into the V0 2 lattice, which can increase or decrease Γ.Additionally, the chapter will examine the effects of dopants and the requirements of dopants to achieve the desired effect on T will be discussed. Solid-state thermochromic materials may be exploited in devices such as microelectronics, data storage, or intelligent architectural glazing, thus are required to be synthesis as thin films for use in such applications. The numerous synthetic techniques for making metal oxide thermochromic thin films will be investigated through a comparison of each synthetic method.In exploring recent research on the production of thin film, the chapter explains that micro-structural changes bought about by careful control of film growth conditions, and/or the use of surfactant, lead to an

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Low emittance coatings and the thermal performance of vacuum glazing

Cited by 59 publications

References 8 publications

Low-emissivity materials for building applications: A state-of-the-art review and future research perspectives

Low-emissivity materials for building applications: A state-of-the-art review and future research perspectives

Analysis of the Performance of Vacuum Glazing in Office Buildings in Korea: Simulation and Experimental Studies

Thermochromic Thin Films and Nanocomposites for Smart Glazing

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