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Alongi, A, Angelotti, A, Rizzo, A and Zanelli, A (2021) Measuring the thermal resistance of double and triple layer pneumatic cushions for textile architectures. Architectural Engineering and Design Management, 17(03–04), 334–46.

  • Type: Journal Article
  • Keywords: pneumatic cushion; thermal resistance; thermal transmittance; energy performance; measurement; heat flow; free convection; multilayered membrane skin;
  • ISBN/ISSN: 1745-2007
  • URL: https://doi.org/10.1080/17452007.2020.1740152
  • Abstract:
    Lightweight architecture, implementing coated fabric and membrane materials, increasingly adopts multiple layer pneumatic cushions in order to guarantee adequate thermal insulation and better indoor comfort, especially in permanent buildings. The cushion thermal transmittance decreases as the number of layers increases. However, the U-value is generally assessed by simple calculations assuming the cushion layers are parallel planes. This way, any effect of the curved geometry of the cushion on the heat transfer is disregarded. In this paper, an experimental approach to evaluate the overall U-value of multiple layer cushions is proposed. Two sample cushions of about 1 m2 made up of PVC-coated polyester are built, one double layer and one triple layer. They are tested in vertical position in a double thermal chamber laboratory apparatus, establishing a constant temperature difference equal to 25°C across them. The cushion surfaces are divided into thermally homogeneous portions where temperature and heat flow density probes are centrally placed. In parallel, the U-values are calculated using literature correlations for free convection in rectangular cavities and assuming radiative heat transfer between parallel grey surfaces. The experimental results show that, passing from two to three layers, the overall thermal resistance of the cushion almost doubles (+ 91%) and the thermal transmittance reduces by about 30%. At the same time, simple calculations of the U-value underestimate the insulation capacity of the cushions, especially for the double layer one. Further investigations are necessary to understand the impact of the cushion shape on free convection in the air cavity.

de Smedt, E, Mollaert, M, Van Craenenbroeck, M, Caspeele, R and Pyl, L (2021) Reliability-based analysis of a cable-net structure and membrane structure designed using partial factors. Architectural Engineering and Design Management, 17(03–04), 316–25.

Kriklenko, E (2021) Complex bending-active structures from continuous flexible planar sheets or a hybrid structure introducing the use of spacer fabrics. Architectural Engineering and Design Management, 17(03–04), 242–63.

Lienhard, J and Eversmann, P (2021) New hybrids – from textile logics towards tailored material behaviour. Architectural Engineering and Design Management, 17(03–04), 169–74.

Mazzola, C, Zanelli, A, Stimpfle, B and Canobbio, R (2021) Temporactive pavilion: second design-to-construction loop of an ultra-lightweight temporary architecture. Architectural Engineering and Design Management, 17(03–04), 216–28.

Mesrop, A (2021) Algorithmic design and evaluation of emergency shelters. Architectural Engineering and Design Management, 17(03–04), 229–41.

Monticelli, C and Zanelli, A (2021) Material saving and building component efficiency as main eco-design principles for membrane architecture: case - studies of ETFE enclosures. Architectural Engineering and Design Management, 17(03–04), 264–80.

Rychtáriková, M, Šimek, R, Húsenicová, J and Chmelík, V (2021) Prediction of noise levels in large shopping streets covered by glass and ETFE. Architectural Engineering and Design Management, 17(03–04), 326–33.

Silvestri, A, Paraciani, N and Villani, T (2021) Performance evaluation of textile materials for lightweight envelopes in minor sports facilities and their impact on indoor comfort. Architectural Engineering and Design Management, 17(03–04), 347–59.

Tamke, M, Sinke Baranovskaya, Y, Monteiro, F, Lienhard, J, La Magna, R and Ramsgaard Thomsen, M (2021) Computational knit – design and fabrication systems for textile structures with customised and graded CNC knitted fabrics. Architectural Engineering and Design Management, 17(03–04), 175–95.

Thomas, J and Le Van, A (2021) Deflections of pneumatic masts and columns. Architectural Engineering and Design Management, 17(03–04), 299–315.

Uhlemann, J, Stranghöner, N, Motevalli, M and Balzani, D (2021) Architectural woven polyester fabrics: examination of possible classification of stiffness values in correlation with strength values. Architectural Engineering and Design Management, 17(03–04), 281–98.

Zanelli, A, Kolo, E, Monticelli, C, Rosina, E, Poli, T, Speroni, A, Mainini, A G and Cadena, J D B (2021) A removable textile hybrid structural screen for the windows of Castello Sforzesco, Milan: when experimental metrics inform the bespoke ‘design-to-construction’ process in historical contexts. Architectural Engineering and Design Management, 17(03–04), 196–215.