Building Science II Project 2

SABD BACHELOR OF SCIENCE (HONS) IN ARCHITECTURE BUILDING SCIENCE II (ARC 61303) ASSIGNMENT 2 - LIGHTING INTEGRATION PROJECT

NAME : CHEONG YEN SIN STUDENT ID : 0328050 TUTOR : DR.SUJA

Formula Average Daylight Factor = (W/A) x [ T θ / (1-R) ] W- area of window (m²) A- Total area of internal surface (m²) T- Glass transmittance Θ- Visible sky angle in degrees from centre of window R- Average reflectance of area A K, Room Index = (Lw)/ [ Hm x (L+W) ] L- Length (m) W-Width (m) Hm- Mounted height of fitting above work plane (m)

Number of Light = E X A / F x UF x MF N- Number of lamps required E- Illuminance level required (lux) A- Area at working plane height (m²) F- Average luminous flux from each lamp (lm) UF- Utilisation factor, allowance for light distribution of luminaire and room surfaces MF- Maintenance factor, allowance for reduced light output because of deterioration and dirt

Space A - Library Daylighting Calculation

Windows area, W (m²)

Total area of internal surface, A (m²)

Transmittance value,T

Visible sky angle in degrees from the centre of window, �

Average reflectance of area A, R

Average Daylight Factor =(W/A) x [ T θ / (1-R) ] =(7.92/429.85) x [ 0.6 x 45 / (1-0.35) ] = 0.7643 = 0.76% (Poor)

Area = (1.2 x 2.2) x 3 = 2.64 x 3 = 7.92 m²

Walls = (21.3 x 3.75) + (2.8 x 3.75) + (6.9 x 3.75) + (8.4 x 3.75) = 83.85m² Floor & Ceiling = 173m² Total = 83.85 + 173 + 173 =429.85m²

0.6 (Double Glazed Window)

45°

0.35 (Uncoloured Concrete)

Space A - Library Room Index Calculation

Dimensions of Library (m)

Total Floor Area (m²)

Height of Ceiling (m)

Luminous Flux of Lighting (lm)

Height of working Plane (m)

Mounting height (Hm)

Standard illumination level (lux)

K, Room Index = (LW)/ [ Hm x (L+W) ] = (21 x 9.9) / [ 2.8 x (21 + 9.9)] =2.4

Basing on the UF table, C= 0.7, W=0.5, F=0.3, UF=0.69

21.0(L) x 9.9(W)

173

3.6

1600

0.8

2.8

300

Space A - Library Lumen Calculation

Standard illuminance level, E

Area at working plane height, A (m²)

Luminous Flux of Lighting, F (lm)

Utilization factor, UF

Maintenance Factor, MF

Number of lightings required, N

Lighting layout, m

300

173

1600

0.69

0.8 (Standard)

18

4.2

Number of Light = E X A / F x UF x MF = 300 x 173 / 1600 x 0.69 x 0.8 =17.9 =18 Approximately 18 lamps to be installed to illuminate Space A Spacing S max = 1.5 x Hm = 1.5 x 2.8 = 4.2 Distance of lamps ≤ 4.2

Space B - Gym Room Daylighting Calculation

Windows area, W (m²)

Total area of internal surface, A (m²)

Transmittance value,T

Visible sky angle in degrees from the centre of window, �

Average reflectance of area A, R

Area = (1.2 x 2.2) x 8 = 2.64 x 8 = 21.12 m²

Walls = (13.6 x 3.75) + (9.0 x 3.75) + (8.2 x 3.75) + (6.7 x 3.75) = 140.625 m² Floor & Ceiling = 110 m² Total = 140.625 + 110 + 110 = 360.625 m²

0.6 (Double Glazed Window)

80°

0.35 (Uncoloured Concrete)

Average Daylight Factor =(W/A) x [ T θ / (1-R) ] =(21.12 / 360.625) x [ 0.6 x 80 / (1-0.5) ] = 4.32 = 4.32% (Good)

Space B - Gym Room Room Index Calculation

Dimensions of Library (m)

Total Floor Area (m²)

Height of Ceiling (m)

Luminous Flux of Lighting (lm)

Height of working Plane (m)

Mounting height (Hm)

Standard illumination level (lux)

K, Room Index = (LW)/ [ Hm x (L+W) ] = ( 13.6 x 9.4 ) / [ 2.4 x (13.6 + 9.4)] = 2.3

Basing on the UF table, C= 0.7, W=0.5, F=0.3, UF=0.69

13.6(L) x 9.4(W)

110

3.6

2900

1.2

2.4

300

Space B - Gym Room Lumen Calculation

Standard illuminance level, E

Area at working plane height, A (m²)

Luminous Flux of Lighting, F (lm)

Utilization factor, UF

Maintenance Factor, MF

Number of lightings required, N

Lighting layout, m

300

110

2900

0.69

0.8 (Standard)

6

3.6

Number of Light = E X A / F x UF x MF = 300 x 110 / 2900 x 0.69 x 0.8 = 6.3 =6 Approximately 6 lamps to be installed to illuminate Space A Spacing S max = 1.5 x Hm = 1.5 x 2.4 = 3.6 Distance of lamps ≤ 3.6