Modeling of Skylight on Dome Shaped Roof of Low Energy Adobe House Located in New Delhi (India)

Arvind Chel
Centre for Energy Studies, Indian Institute of Technology Delhi, New Delhi, India

G. N. Tiwari
Centre for Energy Studies, Indian Institute of Technology Delhi, New Delhi, India

Ladda ner artikelhttp://dx.doi.org/10.3384/ecp110571889

Ingår i: World Renewable Energy Congress - Sweden; 8-13 May; 2011; Linköping; Sweden

Linköping Electronic Conference Proceedings 57:20, s. 1889-1897

Visa mer +

Publicerad: 2011-11-03

ISBN: 978-91-7393-070-3

ISSN: 1650-3686 (tryckt), 1650-3740 (online)


The daylight factor model given by Charted Institute of Building Services Engineers (CIBSE) was modified in this paper to incorporate time variations with respect to zenith angle (?z) and vertical height (h) of working surface above ground surface which was normalized with central height (H) of skylight dome. The modified model contains constant exponents which are determined using linear regression analysis based on hourly experimental data of inside and outside illuminance for each month of the year 2007–2008. The prediction of modified model is found in good agreement with experimental observed inside illuminance data on the basis of values of root mean square percentage error (e) and correlation coefficient (r). The annual average daylight factor values for big and small dome skylight rooms are determined as 2.3% and 4.4% respectively. The energy saving potential of skylight rooms for selected climatic locations in India is also presented in this paper. This paper also investigates embodied energy of an existing eco-friendly and low embodied energy adobe house with dome shape roof located at Solar Energy Park inside IIT Delhi campus in New Delhi (India). Based on embodied energy analysis; the energy payback time for the adobe house was determined as 18 years. The embodied energy per unit floor area of reinforced cement concrete (R.C.C.) building (3702.3 MJ/m2) is quiet higher as compared to adobe house embodied energy (2298.8 MJ/m2).


Skylight; Dome shape roof; Daylight Factor; Illumination; Mud house


[1] Webb AR. Considerations for lighting in the built environment: non-visual effects of light. Energy Build 2006; 38(7):721–7. doi: 10.1016/j.enbuild.2006.03.004.

[2] Chel A; Tiwari GN; Chandra A. A model for estimation of daylight factor for skylight: an experimental validation using pyramid shape skylight over vault roof mud-house in New Delhi (India). Appl Energy 2009; 86(11):2507–19. doi: 10.1016/j.apenergy.2009.03.004.

[3] Aries MBC; Newsham GR. Effect of daylight saving time on lighting energy use: a literature review. Energy Policy 2008; 36(6):1858–66. doi: 10.1016/j.enpol.2007.05.021.

[4] Building Research Establishment (BRE). Energy consumption guide 19; Energy use in offices; energy efficiency best practice programme; BRECSU Enquiries Bureau; Garston; Watford; 1997.

[5] Guide F. Energy efficiency in buildings; Chartered Institute of Building Services Engineers (CIBSE); 1999.

[6] Peacock AD; Newborough M; Banfill PFG. Technology assessment for the existing built-asset base (TARBASE); WREC; Aberdeen; 22–27 May 2005.

[7] Greenup P; Bell JM; Moore I. The importance of interior daylight distribution in buildings on overall energy performance. Renew Energy 2001; 22(1–3):45–52. doi: 10.1016/S0960-1481(00)00027-6.

[8] Reinhart CF. Lightswitch-2002: a model for manual and automated control of electric lighting a blinds. Solar Energy 2004; 77(1):15–28. 1896

[9] Li DHW; Lam JC. An analysis of lighting energy-savings and switching frequency for a daylit corridor under various indoor design illuminance levels. Appl Energy 2003; 76(4):363–78. doi: 10.1016/S0306-2619(02)00121-6.

[10] Franzetti C; Fraisse G; Achard G. Influence of the coupling between daylight and artificial lighting on thermal loads in the office buildings. Energy Build 2004;36(2):117–26. doi: 10.1016/j.enbuild.2003.10.005.

[11] Lee ES; Bartolomeo DLD; Selkowitz SE. Daylighting-control performance of a thin-film ceramic electrochromic window: field study results. Energy Build 2006;38(1):30–44. doi: 10.1016/j.enbuild.2005.02.009.

[12] Tong TDW; King Sing L; Cheung TM; Leung CS. Potential energy saving for a side-lit room using daylight-linked fluorescent lamp installations. Light Res Technol 2002;34(2):121–33. doi: 10.1191/1365782802li038oa.

[13] Smith GB. Materials and systems for efficient lighting and delivery of daylight. Solar Energy Mater Solar Cells 2004; 84(1–4):395–409. doi: 10.1016/j.solmat.2004.02.047.

[14] Reinhart C; Fitz A. Findings from a survey on the current use of daylight simulations in building design. Energy Build 2006; 38(7):824–35. doi: 10.1016/j.enbuild.2006.03.012.

[15] ASHRAE; Fundamentals handbook; 2001 [chapter 29].

[16] Guide A. Environmental design; Chartered Institute of Building Services Engineers (CIBSE); 2006.

[17] Hunt DRG. Availability of daylight; Department of Environment; London; Building Research Establishment (BRE) Report; Garston; Watford; 1979.

[18] Hunt DRG. The use of artificial lighting in relation to daylight levels and occupancy. Build Environ 1979; 14(1):21–33. doi: 10.1016/0360-1323(79)90025-8.

[19] Stokes M; Rylatt M; Lomas K. A simple model of domestic-lighting demand. Energy Build 2004; 36(2):103–16. doi: 10.1016/j.enbuild.2003.10.007.

[20] Mahlia T; Said M; Masjuki H; Tamjis M. Cost-benefit analysis and emission reduction of lighting retrofits in residential sector. Energy Build 2005;37(6):573–8. doi: 10.1016/j.enbuild.2004.08.009.

[21] Laouadi A; Reinhart CF; Bourgeois D. Efficient calculation of daylight coefficients for rooms with dissimilar complex fenestration systems. J Build Perform Simulat 2008;1(1):3–15. doi: 10.1080/19401490701868299.

[22] Tregenza PR; Waters IM. Daylight coefficients. Light Res Technol 1983; 15(2):65–71. doi: 10.1177/096032718301500201.

[23] Rosa AD; Ferraro V; Kaliakatsos D; Marinelli V. Calculating indoor natural illuminance in overcast sky conditions. Appl Energy 2010; 87(3):806–13. doi: 10.1016/j.apenergy.2009.09.034.

[24] Joshi M; Sawhney RL; Buddhi D. Estimation of luminous efficacy of daylight and exterior illuminance for composite climate of Indore city in Mid Western India. Renew Energy 2007; 32(8):1363–78. doi: 10.1016/j.renene.2006.06.003.

[25] Chartered Institute of Building Services Engineers (CIBSE); Daylighting and window design; Lighting Guide 10; 1999.

[26] Chel A; Tiwari GN. Performance evaluation and life cycle cost analysis of earth to air heat exchanger integrated with adobe building for New Delhi composite climate. Energy Build 2009;41(1):56–66. doi: 10.1016/j.enbuild.2008.07.006.

[27] Chel A; Tiwari GN. Thermal performance and embodied energy analysis of a passive house – case study of vault roof mud-house in India. Appl Energy 2009; 86(10):1956–69. doi: 10.1016/j.apenergy.2008.12.033.

[28] Chel A; Tiwari GN. Stand-alone photovoltaic (PV) integrated with earth to air heat exchanger (EAHE) for space heating/cooling of adobe house in New Delhi (India). Energy Convers Manage 2010; 51(3):393–409. doi: 10.1016/j.enconman.2009.10.001.

[29] Laouadi A; Atif MR. Daylight availability in top-lit atria: prediction of skylight transmittance and daylight factor. Light Res Technol 2000; 32(4):175–86. doi: 10.1177/096032710003200401.

[30] Chel A.; Tiwari G.N. and Singh H.N. A modified model for estimation of daylight factor for skylight integrated with dome roof structure of mud-house in New Delhi (India); Appl Energy 2010; 87(10): 3037-50. doi: 10.1016/j.apenergy.2010.02.018.

[31] Jenkins D; Newborough M. An approach for estimating the carbon emissions associated with office lighting with a daylight contribution. Appl Energy 2007; 84(6):608–22. doi: 10.1016/j.apenergy.2007.02.002.

Citeringar i Crossref