Next Article in Journal
Smart Solar-Powered LED Outdoor Lighting System Based on the Energy Storage Level in Batteries
Next Article in Special Issue
Preparation and Characterization of Plasters with Photodegradative Action
Previous Article in Journal
Design and Development of Weatherproof Seals for Prefabricated Construction: A Methodological Approach
Article Menu
Issue 9 (September) cover image

Export Article

Open AccessArticle
Buildings 2018, 8(9), 118; https://doi.org/10.3390/buildings8090118

Daylight Performance of a Translucent Textile Membrane Roof with Thermal Insulation

Research Centre for Sustainable Energy Technologies zafh.net, University of Applied Sciences Stuttgart, Schellingstr. 24, 70174 Stuttgart, Germany
*
Author to whom correspondence should be addressed.
Received: 29 July 2018 / Revised: 17 August 2018 / Accepted: 20 August 2018 / Published: 24 August 2018
(This article belongs to the Special Issue Green Building Materials)
Full-Text   |   PDF [4034 KB, uploaded 7 September 2018]   |  

Abstract

Daylight usage in buildings improves visual comfort and lowers the final energy demand for artificial lighting. The question that always occurs is how much conservation can be achieved? New or rare materials and constructions have a lack of information about their application. Therefore, the current investigation quantifies the daylight and energy performance of a rare multi-layer textile membrane roof. A translucent, thermal insulation with a glass fibre fleece between the two roof membranes combines daylight usage and heating demand reduction. A sports hall built in 2017 is used as a case study building with 2300 m2 membrane roof surface. The optical properties of the roof construction were measured with a total visual light transmittance τv of 0.72% for a clean surface. A climate-based annual daylight modelling delivers daylight indicators for different construction scenarios. The results show that, in comparison to only one glass façade, the additional translucent and thermally insulated membrane roof construction increases the annual daylight autonomy (DA700) from 0% to 1.5% and the continuous DA700 from 15% to 38%. In the roof-covered areas of the sport field, this results in a 30% reduction of the electricity demand for artificial lighting from 19.7 kWhel/m2/a to 13.8 kWhel/m2/a, when a dimming control is used. The study also found that the influence of the soiling of one layer decreases its light transmittance by a factor 0.81. Two soiled layers lower τv by a factor of 0.66 to 0.47%. This increases the electricity demand for lighting by only 12%. The results should be very valuable as a comparison and benchmark for planners and future buildings of a similar type. View Full-Text
Keywords: translucent textile membrane roof; climate-based daylight modelling; daylight performance; energy conservation; translucent thermal insulation; multi-layer membrane translucent textile membrane roof; climate-based daylight modelling; daylight performance; energy conservation; translucent thermal insulation; multi-layer membrane
Figures

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Gürlich, D.; Reber, A.; Biesinger, A.; Eicker, U. Daylight Performance of a Translucent Textile Membrane Roof with Thermal Insulation. Buildings 2018, 8, 118.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Buildings EISSN 2075-5309 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top