Organizational features in leaves for application in shading systems for building envelopes

Main principles and methods for sunlight tracking in leaves are presented for possible application in shading systems. Plants have developed unique mechanisms for specific climates and locations, where they can determine the amount of exposure for efficient performance. Physiology and geometry are the most significant factors influencing light interception in plants, where leaf distribution, orientation and dynamics influence the exposure to sun radiation. The possibility of developing a shading system for building envelopes, based on the unique shape and structure of plant leaves, which provide them the desired flexibilities induced by sunlight, is discussed and a summary of the main principles is presented. The shade elements have to be more flexible in all directions, where altitude and azimuth angles of the sun have to be considered. An efficient design of shading system for an envelope is achieved when it is adapted to the sun radiation path of each day.

[1]  H. G. Jones,et al.  Leaf orientation and distribution in a Phaseolus vulgaris L. crop and their relation to light microclimate , 1999, International journal of biometeorology.

[2]  Yoseph Bar-Cohen,et al.  Biomimetics : Biologically Inspired Technologies , 2011 .

[3]  V. Olgyay.  Design With Climate: Bioclimatic Approach to Architectural Regionalism , 1963 .

[4]  Exequiel Ezcurra,et al.  Architecture, Light Interception, and Distribution of Larrea Species in the Monte Desert, Argentina , 1991 .

[5]  H. S. Horn.  The adaptive geometry of trees , 1971 .

[6]  J. Ehleringer,et al.  Solar tracking response to drought in a desert annual , 2004, Oecologia.

[7]  Claudia Ozimek.  Bücher: ClimaSkin – Konzepte für Gebäudehüllen, die mit weniger Energie mehr leisten. By G. Hausladen, M. de Saldanha, P. Liedl , 2007 .

[8]  Felix R. Paturi.  Nature, mother of invention: The engineering of plant life , 1976 .

[9]  Ulrich Knaack,et al.  Bio-Inspired Ventilation System for Building Envelopes , 2007 .

[10]  E. F. Brunig.  Tree forms in relation to environmental conditions: an ecological viewpoint , 1976 .

[11]  D. A. King,et al.  The Functional Significance of Leaf Angle in Eucalyptus , 1997 .

[12]  Michael Kriegh,et al.  Growth, Form and Proportion in Nature: Lessons for Human Habitation in off Planet Environments , 2003 .

[13]  L Poorter,et al.  Light environment, sapling architecture, and leaf display in six rain forest tree species. , 1999, American journal of botany.

[14]  Karl J Niklas,et al.  THE ROLE OF PHYLLOTACTIC PATTERN AS A “DEVELOPMENTAL CONSTRAINT” ON THE INTERCEPTION OF LIGHT BY LEAF SURFACES , 1988, Evolution; international journal of organic evolution.

[15]  Hiroyuki Muraoka,et al.  Crown architecture in sun and shade environments: assessing function and trade-offs with a three-dimensional simulation model. , 2005, The New phytologist.

[16]  Yanhong Tang,et al.  Flexible Leaf Orientations of Arisaema heterophyllum Maximize Light Capture in a Forest Understorey and Avoid Excess Irradiance at a Deforested Site , 1998 .

[17]  J. Ehleringer,et al.  Solar tracking by plants. , 1980, Science.

[18]  R. M. Alexander,et al.  Exploring Biomechanics: Animals in Motion , 1992 .

[19]  Cynthia Weinig,et al.  Shade avoidance and the regulation of leaf inclination in Arabidopsis. , 2006, Plant, cell & environment.

[20]  C. Darwin.  Power of Movement in Plants , 1880 .

[21]  Harold A. Mooney,et al.  The carbon gain benefits of solar tracking in a desert annual , 1978 .

[22]  Akira Osawa,et al.  Measurement of three‐dimensional structure of plants with a simple device and estimation of light capture of individual leaves , 1998 .

[23]  Komao Tanaka.  On agricultural productivity. , 1960 .

[24]  R L Satter,et al.  Leaf movements and tendril curling , 1979 .

[25]  Daniel S. Falster,et al.  Leaf size and angle vary widely across species: what consequences for light interception? , 2003, The New phytologist.