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PCM-facade-panel for daylighting and room heating by Helmut Weinläder; Andreas Beck; Jochen Fricke is a Energy article available to read on EtoBox.

What is PCM-facade-panel for daylighting and room heating about?

Double glazings combined with phase change materials (PCM) result in daylighting elements with promising properties. Light transmittances in the range of 0.4 can be achieved with such facade panels. Compared to a double glazing without PCM, a facade panel with PCM shows about 30% less heat losses in south oriented facades. Solar heat gains are also reduced by about 50%. This results in calculated U eff-values of −0.3 to −0.5 Wm−2 K−1, depending on PCM used. For an optimised panel, we calculated an U eff-value of −0.6 Wm−2 K−1. Although the U eff-value of a double glazing is −0.8 Wm−2 K−1, the PCM-systems may prove advantageous in lightweight constructed buildings due to their equalised energy balance during the course of day. Facade panels with PCM improve thermal comfort considerably in winter, especially during evenings. In summer, such systems show low heat gains, which reduces peak cooling loads during the day. Additional heat gains in the evening can be drawn off by night-time ventilation. If a PCM with a low melting temperature of up to 30 °C is used, thermal comfort in summer will also improve during the day, compared to a double glazing without or with inner sun protection.

Who reads PCM-facade-panel for daylighting and room heating?

Author

Helmut Weinläder; Andreas Beck; Jochen Fricke

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0038-092X)

Published

2005

Language

EN

Field

Energy (Physical Sciences)