Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 30184
The Impact of Hospital Intensive Care Unit Window Design on Daylighting and Energy Performance in Desert Climate

Authors: A. Sherif, H. Sabry, A. Elzafarany, M. Gadelhak, R. Arafa, M. Aly

Abstract:

This paper addresses the design of hospital Intensive Care Unit windows for the achievement of visual comfort and energy savings. The aim was to identify the window size and shading system configurations that could fulfill daylighting adequacy, avoid glare and reduce energy consumption. The study focused on addressing the effect of utilizing different shading systems in association with a range of Window-to-Wall Ratios (WWR) in different orientations under the desert clear-sky of Cairo, Egypt. The results of this study demonstrated that solar penetration is a critical concern affecting the design of ICU windows in desert locations, as in Cairo, Egypt. Use of shading systems was found to be essential in providing acceptable daylight performance and energy saving. Careful positioning of the ICU window towards a proper orientation can dramatically improve performance. It was observed that ICU windows facing the north direction enjoyed the widest range of successful window configuration possibilities at different WWRs. ICU windows facing south enjoyed a reasonable number of configuration options as well. By contrast, the ICU windows facing the east orientation had a very limited number of options that provide acceptable performance. These require additional local shading measures at certain times due to glare incidence. Moreover, use of horizontal sun breakers and solar screens to protect the ICU windows proved to be more successful than the other alternatives in a wide range of Window to Wall Ratios. By contrast, the use of light shelves and vertical shading devices seemed questionable.

Keywords: Daylighting, Desert, Energy Efficiency, Shading.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1107021

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1819

References:


[1] FGI, Guidelines for Design and Construction of Hospitals and Outpatient Facilities. USA: The Facility Guidelines Institute, 2014.
[2] M. M. Shepley, R. P. Gerbi, A. E.Watson, S. Imgrund, and R. Sagha- Zadeh, “The impact of daylight and views on ICU patients and staff,” Health Environments Research & Design Journal (HERD), vol. 5, no. 2, pp.46-60, 2012.
[3] R. Ulrich, X. Quan, C. Zimring, A. Joseph and R. Choudhary, “The role of the physical environment in the hospital of the 21st century: a oncein- a-lifetime opportunity,” The Center for Health Design SM, 2004.
[4] S. Pornkrisadanuphan and P. Chaiwiwatworakul, “A Genetic Algorithm- Based Approach Design for Energy-Efficient Building in Thailand,” In Proc. of the International Conf. on Environment Science and Engineering (IPCBEE), Singapore, 2011.
[5] H. Alzoubi and A. Al-Zoubi, “Assessment of building façade performance in terms of daylighting and the associated energy consumption in architectural spaces: Vertical and horizontal shading devices for southern exposure facades,” Energy Conversion and Management, vol. 51, pp. 1592-1599, 2010.
[6] A. Sherif, H. Sabry and T. Rakha, "External perforated Solar Screens for daylighting in residential desert buildings: Identification of minimum perforation percentages," Solar Energy, vol. 86, no. 6, pp. 1929–1940, 2012-a.
[7] A. Sherif, H. Sabry and M. Gadelhak, "The impact of changing solar screen rotation angle and its opening aspect ratios on Daylighting Availability in residential desert buildings," Solar Energy, vol. 86, no. 11, pp. 3353–3363, 2012-b.
[8] A. Sherif, A. Zafarany and R. Arafa, “Energy simulation as a tool for selecting window and shading configuration in extreme desert environment- Case Study: Intensive Care Unit in Aswan,” In Proc. of the Sustainable Building Conf. (SB 2013), Cairo, Egypt, 2013-a.
[9] A. Sherif, H. Sabry and M. Gadelhak, “Daylighting simulation as means for configuring hospital intensive care unit windows under the desert clear skies,” In Proc. of the Building Simulation Conf. (BS 2013), Chambéry, France, 2013-b.
[10] Time and Date AS, “Sunrise and sunset in Cairo,” (Time and Date AS) (Online), Available: http://www.timeanddate.com/worldclock/ astronomy.html?n=748 (Accessed 15 Dec. 2012), 2012.
[11] D. DiLaura, et al, The Lighting Handbook: Reference and Application, New York (NY): Illuminating Engineering Society of North America, 2011.
[12] C. F. Reinhart and J. Wienold, “The daylighting dashboard -A simulation-based design analysis for daylit spaces,” Building and Environment, vol.46, pp. 386-396, 2011.
[13] J. Wienold, “Dynamic daylight glare evaluation,” In Proc. of Buildings Simulation 2009, 2009.
[14] J. Wienold and J. Christoffersen, “Evaluation methods and development of a new glare prediction model for daylight environments with the use of CCD cameras,” Energy and buildings, vol. 38, no.7, pp. 743-757, 2006.
[15] Climate and Temperature 2013. “Climate of Cairo, Egypt: Average Weather” Available: http://www.cairo.climatemps.com/ (Accessed 27 December 2013).