TIME-LAPSE PHOTOGRAPHY AND IMAGE RECOGNITION TO MONITOR OCCUPANT-CONTROLLED SHADE PATTERNS: ANALYSIS AND RESULTS

This paper presents a high-level overview of a methodology for analysing window shade use in existing buildings. Time-lapse photography is paired with a robust image recognition algorithm to facilitate assessment of shade use and identify any possible trends. The methodology applied on a highrise building consisting of multiple open plan offices. The analysis showed that the mean shade occlusion and the shade movement rate depend on facade orientation, with the near-south facade having the highest values and the near-north facade having the lowest ones. An average shade use rate of 0.5/day was observed, with the 72% of the shades never adjusted, throughout the period of observation.

[1]  Christoph F. Reinhart,et al.  Monitoring manual control of electric lighting and blinds , 2003 .

[2]  S. Pigg,et al.  Behavioral Aspects of Lighting and Occupancy Sensors in Private Offices : A Case Study of a University Office Building , 1996 .

[3]  Ardeshir Mahdavi,et al.  Occupants' operation of lighting and shading systems in office buildings , 2008 .

[4]  Andreas K. Athienitis,et al.  Manually-operated window shade patterns in office buildings: A critical review , 2013 .

[5]  Marc Fontoynont,et al.  The use of shading systems in VDU task offices: A pilot study , 2006 .

[6]  J. Michalsky,et al.  Modeling daylight availability and irradiance components from direct and global irradiance , 1990 .

[7]  Peter Barrett,et al.  Factors influencing occupants’ blind-control behaviour in a naturally ventilated office building , 2012 .

[8]  T. Inoue,et al.  The development of an optimal control system for window shading devices based on investigations in office buildings , 1988 .

[9]  P. Boyce.  Observations of the manual switching of lighting , 1980 .

[10]  M S. Rea,et al.  Window blind occlusion: a pilot study , 1984 .

[11]  Belinda L Collins,et al.  Window blinds as a potential energy saver: a case study. Building science series (final). [Effects of building orientation] , 1978 .

[12]  J. Veitch,et al.  A Room with a View: A Review of the Effects of Windows on Work and Well-Being , 2004 .

[13]  Vorapat Inkarojrit,et al.  Monitoring and modelling of manually-controlled Venetian blinds in private offices: a pilot study , 2008 .

[14]  Adrian Leaman,et al.  Assessing building performance in use 3: energy performance of the Probe buildings , 2001 .

[15]  Darren Robinson,et al.  Adaptive actions on shading devices in response to local visual stimuli , 2010 .

[16]  William O'Brien,et al.  METHODOLOGY FOR QUANTIFYING THE PERFORMANCE IMPLICATIONS OF INTELLIGENT SHADE CONTROL IN EXISTING BUILDINGS IN AN URBAN CONTEXT , 2010 .