Abstract

A hybrid illumination method using both daylight and light-emitting diodes (LEDs) for indoor lighting is presented in this study. The daylight can be introduced into the indoor space by a panel-integration system. The daylight part and LEDs are combined within a specific luminaire that can provide uniform illumination. The LEDs can be turned on and dimmed through closed-loop control when the daylight illuminance is inadequate. We simulated the illumination and calculated the indoor lighting efficiency of our hybrid daylight and LED lighting system, and compared this with that of LED and fluorescent lighting systems. Simulation results show that the efficiency of the hybrid daylight/LED illumination method is better than that of LED and traditional lighting systems, under the same lighting conditions and lighting time; the method has hybrid lighting average energy savings of T5 66.28%, and that of the LEDs is 41.62%.

© 2014 Optical Society of America

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References

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  1. Interlaboratory Working Group on Energy-Efficient and Clean-Energy Technologies, Scenarios for a Clean Energy Future, ORNL/CON-476, LBNL-44029, and NREL/TP-620-29379, November (2000), http://www.nrel.gov/docs/fy01osti/29379.pdf .
  2. A. Pandharipande and D. Caicedo, “Daylight integrated illumination control of LED systems based on enhanced presence sensing,” Energy Build. 43, 944–950 (2011).
    [CrossRef]
  3. Y.-J. Wen and A. M. Agogino, “Control of wireless-networked lighting in open-plan offices,” Lighting Res. Technol. 43, 235–248 (2011).
    [CrossRef]
  4. D. Seo, L. Park, P. Ihm, and M. Krarti, “Optimal electrical circuiting layout and desk location for daylighting controlled spaces,” Energy Build. 51, 122–130 (2012).
    [CrossRef]
  5. A. Ge, J. L. Cai, L. Li, W. Wang, and P. Qiu, “Panel-integration of natural light and the related system of light guiding and illumination,” Opt. Lett. 37, 3666–3668 (2012).
    [CrossRef]
  6. Cree, “XLamp XP-E data sheet,” http://www.cree.com/~/media/Files/Cree/LED%20Components%20and%20Modules/XLamp/Data%20and%20Binning/XLampXPE.pdf .
  7. D. Kolokotsa, A. Pouliezos, G. Stavrakakis, and C. Lazos, “Predictive control techniques for energy, and indoor environmental quality management in buildings,” Building and Environment 44, 1850–1863 (2008).
  8. C. H. Tsuei, J. W. Pen, and W. S. Sun, “Simulating the illuminance and the efficiency of the LED and fluorescent lights used in indoor lighting design,” Opt. Express 16, 18692–18701 (2008).
    [CrossRef]

2012

D. Seo, L. Park, P. Ihm, and M. Krarti, “Optimal electrical circuiting layout and desk location for daylighting controlled spaces,” Energy Build. 51, 122–130 (2012).
[CrossRef]

A. Ge, J. L. Cai, L. Li, W. Wang, and P. Qiu, “Panel-integration of natural light and the related system of light guiding and illumination,” Opt. Lett. 37, 3666–3668 (2012).
[CrossRef]

2011

A. Pandharipande and D. Caicedo, “Daylight integrated illumination control of LED systems based on enhanced presence sensing,” Energy Build. 43, 944–950 (2011).
[CrossRef]

Y.-J. Wen and A. M. Agogino, “Control of wireless-networked lighting in open-plan offices,” Lighting Res. Technol. 43, 235–248 (2011).
[CrossRef]

2008

D. Kolokotsa, A. Pouliezos, G. Stavrakakis, and C. Lazos, “Predictive control techniques for energy, and indoor environmental quality management in buildings,” Building and Environment 44, 1850–1863 (2008).

C. H. Tsuei, J. W. Pen, and W. S. Sun, “Simulating the illuminance and the efficiency of the LED and fluorescent lights used in indoor lighting design,” Opt. Express 16, 18692–18701 (2008).
[CrossRef]

Agogino, A. M.

Y.-J. Wen and A. M. Agogino, “Control of wireless-networked lighting in open-plan offices,” Lighting Res. Technol. 43, 235–248 (2011).
[CrossRef]

Cai, J. L.

Caicedo, D.

A. Pandharipande and D. Caicedo, “Daylight integrated illumination control of LED systems based on enhanced presence sensing,” Energy Build. 43, 944–950 (2011).
[CrossRef]

Ge, A.

Ihm, P.

D. Seo, L. Park, P. Ihm, and M. Krarti, “Optimal electrical circuiting layout and desk location for daylighting controlled spaces,” Energy Build. 51, 122–130 (2012).
[CrossRef]

Kolokotsa, D.

D. Kolokotsa, A. Pouliezos, G. Stavrakakis, and C. Lazos, “Predictive control techniques for energy, and indoor environmental quality management in buildings,” Building and Environment 44, 1850–1863 (2008).

Krarti, M.

D. Seo, L. Park, P. Ihm, and M. Krarti, “Optimal electrical circuiting layout and desk location for daylighting controlled spaces,” Energy Build. 51, 122–130 (2012).
[CrossRef]

Lazos, C.

D. Kolokotsa, A. Pouliezos, G. Stavrakakis, and C. Lazos, “Predictive control techniques for energy, and indoor environmental quality management in buildings,” Building and Environment 44, 1850–1863 (2008).

Li, L.

Pandharipande, A.

A. Pandharipande and D. Caicedo, “Daylight integrated illumination control of LED systems based on enhanced presence sensing,” Energy Build. 43, 944–950 (2011).
[CrossRef]

Park, L.

D. Seo, L. Park, P. Ihm, and M. Krarti, “Optimal electrical circuiting layout and desk location for daylighting controlled spaces,” Energy Build. 51, 122–130 (2012).
[CrossRef]

Pen, J. W.

Pouliezos, A.

D. Kolokotsa, A. Pouliezos, G. Stavrakakis, and C. Lazos, “Predictive control techniques for energy, and indoor environmental quality management in buildings,” Building and Environment 44, 1850–1863 (2008).

Qiu, P.

Seo, D.

D. Seo, L. Park, P. Ihm, and M. Krarti, “Optimal electrical circuiting layout and desk location for daylighting controlled spaces,” Energy Build. 51, 122–130 (2012).
[CrossRef]

Stavrakakis, G.

D. Kolokotsa, A. Pouliezos, G. Stavrakakis, and C. Lazos, “Predictive control techniques for energy, and indoor environmental quality management in buildings,” Building and Environment 44, 1850–1863 (2008).

Sun, W. S.

Tsuei, C. H.

Wang, W.

Wen, Y.-J.

Y.-J. Wen and A. M. Agogino, “Control of wireless-networked lighting in open-plan offices,” Lighting Res. Technol. 43, 235–248 (2011).
[CrossRef]

Building and Environment

D. Kolokotsa, A. Pouliezos, G. Stavrakakis, and C. Lazos, “Predictive control techniques for energy, and indoor environmental quality management in buildings,” Building and Environment 44, 1850–1863 (2008).

Energy Build.

A. Pandharipande and D. Caicedo, “Daylight integrated illumination control of LED systems based on enhanced presence sensing,” Energy Build. 43, 944–950 (2011).
[CrossRef]

D. Seo, L. Park, P. Ihm, and M. Krarti, “Optimal electrical circuiting layout and desk location for daylighting controlled spaces,” Energy Build. 51, 122–130 (2012).
[CrossRef]

Lighting Res. Technol.

Y.-J. Wen and A. M. Agogino, “Control of wireless-networked lighting in open-plan offices,” Lighting Res. Technol. 43, 235–248 (2011).
[CrossRef]

Opt. Express

Opt. Lett.

Other

Interlaboratory Working Group on Energy-Efficient and Clean-Energy Technologies, Scenarios for a Clean Energy Future, ORNL/CON-476, LBNL-44029, and NREL/TP-620-29379, November (2000), http://www.nrel.gov/docs/fy01osti/29379.pdf .

Cree, “XLamp XP-E data sheet,” http://www.cree.com/~/media/Files/Cree/LED%20Components%20and%20Modules/XLamp/Data%20and%20Binning/XLampXPE.pdf .

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Figures (8)

Fig. 1.
Fig. 1.

Overview of the hybrid daylight/LED illumination system.

Fig. 2.
Fig. 2.

Light-collecting panel. (a) Light path of the light-collecting panel. (b) Layout of the panel system.

Fig. 3.
Fig. 3.

Candle power distribution curves: (a) LED module and (b) entire luminaire.

Fig. 4.
Fig. 4.

Closed-loop LED control scheme.

Fig. 5.
Fig. 5.

Hybrid daylight/LED illumination system layout.

Fig. 6.
Fig. 6.

Simulation results of illuminance on target plane at (a) 8:00, (b) 12:00, (c) 16:00, and (d) 20:00.

Fig. 7.
Fig. 7.

Hybrid daylight/LED illumination system prototype.

Fig. 8.
Fig. 8.

Average illuminance of daylight, LEDs, and hybrid lighting from 8:00 to 20:00.

Tables (3)

Tables Icon

Table 1. Measured Illuminance for Each Panel and Luminous Flux

Tables Icon

Table 2. Average Illuminance on Target Plane Achieved by Daylight Only and Hybrid System

Tables Icon

Table 3. Power Consumption for Different Types of Lighting

Equations (5)

Equations on this page are rendered with MathJax. Learn more.

n*sinα=1*sin(π2).
A(t+1)={A(t)+e,ifA(t)+e00ifA(t)+e<0,
S(t)=A(t)+N(t),
e={R(t)S(t),|S(t)R(t)|>ε0,|S(t)R(t)|ε,
dF=E·dS·η,

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