Project 2 : Integration with Design Studio 5 Lighting Analysis

Transcription

1 SCHOOL OF ARCHITECTURE, BUILDING & DESIGN Modern Architecture Studies in Southeast Asia (MASSA) Research Unit Bachelor of Science (Honours) (Architecture) BUILDING SCIENCE 2 [ARC 3413] Project 2 : Integration with Design Studio 5 Lighting Analysis Name: Eleanor Ng Cui Shan ID: Lecturer Mr Sivaraman

2 Zoning of Spaces ZONE 1 ZONE 2 GROUND FLOOR MEZZANINE PLAN ZONE 4 FIRST FLOOR MEZZANINE PLAN

3 ZONE 5 ZONE 6 SECOND FLOOR PLAN

4 Standard MS 1525 LUX Recommendation - Lighting Standard MS Lighting must provide a suitable visual environment within a particular space following the Code of Practice on Energy Efficiency and Use of Energy Sufficient and suitable lighting for the performance and range of tasks and provision of a desired appearance for general building area and restaurant. Type of Interior, Task or Activity Em LUX UGRI Ra Remarks 1. General Building Areas Entrance Halls Lounges Circulation Areas, Corridors At exit and entrance provide an transition zone Stairs, Escalators, Travelators Loading, Ramps, Bays Canteen Restroom Room of Physical Exercise Cloakrooms, Washrooms, Bathrooms, Toilets and avoid sudden change Sick Bay Restaurant & Hotels Reception, Cashier Desk Kitchen Restaurant, Dining Room The lighting should be designed to create intimate atmosphere Self-Services Restaurant Buffet Corridors During night-time, lower levels are acceptable Multipurpose Hall Figure 1: MS 1525 Standard Recommendation for Lighting

5 Lighting Analysis and Calculation Daylight Factor Defined as the ratio (in percentage, of indoors work plane illuminance (at a given point) to the outdoor illuminance on a horizontal plane. In order to calculate daylight factor, formulae below is used: DF = E i E o x 100% Where, DF = Daylight Factor Ei = Illuminance due to daylight at a point on the indoors working plane Eo = Simultaneous outdoor illuminance on a horizontal plane from an unobstructed hemisphere of overcast sky = lux (Malaysia standard outdoor daylight level: lux) According to MS 1525 (2007), DF (%) Distribution >6 Very large with thermal and glare problem 3-6 Good 1-3 Fair 0-1 Poor Table 1: Daylight Factor and its distribution respectively

6 Lumen Method Calculation Also called zonal cavity method, is a simplified method to calculate the light level in a room. This method includes a series of calculations that uses horizontal illuminance criteria to create a uniform luminaire layout in a space. In short, it is the total number of lumens available in a room divided by the area or zoning of the room. In order to perform this calculation, many factors, coefficients, lamp lumen data and other quantities must be gathered. Step 1: Determine the light reflectance (%) for ceiling, wall, window and floor in the overall space based on the reflectance table. Table 2: Light reflectance table Step 2: Determine room index. Room index (RI) is the ratio of room plan area to half the wall area between the working and luminaire planes. RI = L x W Hm x (L+W) Where, L = Length of room W = Width of room Hm = Mounting height (vertical distance between the working plane and the luminaire)

7 Step 3: Identify utilization factor (UF) from table below. Table 3: Utilization Factor Table Step 4: Determine number of fittings required, N. N = E x A F x UF x MF Where, E = MS 1525 standard illuminance over the specific zone F = Lighting design lumens per lamp UF = Utilization factor MF = Maintenance factor A= Area of horizontal working plane Step 5: Identify the Spacing to Height Ratio (SHR), SHR is the ratio of distance between adjacent luminaires to their height above working plane. For a rectangular arrangement of luminaires and by approximately, SHR = 1 Hm A N Where, A = Total floor area N = Number of luminaires Hm = Mounting height (vertical distance between the working plane and the luminaire) Calculate minimum spacing between each fixtures. Calculate number of row fixtures required along the width of the room. Calculate number of fixtures required in each row.

8 Calculate axial spacing between each fixture. Calculate transverse spacing between each fixture. Daylight Factor Analysis 1. Second Floor Zone 5 Foot Spa Hub ZONE 5 Time Luminance (lux) Average 11AM - 2PM PM - 6PM DF = E i E o x 100 Where, E o= Direct Sunlight = lux DF = x 100 = 1.64% According to the Standard MS1525 Daylight factor, 1.64% is located in the range of 1-3%, which Zone 3 is considered as a FAIR zone.

9 Diagram 1: Day Lighting Contour Diagram of second floor generated using Ecotect

10 2. Second Floor - Zone 6 Reading Lounge ZONE 6 Time Luminance (lux) Average 11AM - 2PM PM - 6PM DF = E i E o x 100 Where, E o= Direct Sunlight = lux DF = x 100 = 1.86% According to the Standard MS1525 Daylight factor, 1.86% is located in the range of 1-3%, which Zone 5 is considered as a FAIR zone.

11 Diagram 2: Day Lighting Contour Diagram of second floor generated using Ecotect

12 Artificial Lighting Analysis 1. Ground Floor Mezzanine Zone 2 Restaurant ZONE 2 Location Room Length, L 15.2m Room Width, W Mounting Height of Fitting (from work plane),hm Ground Floor Mezzanine - Zone 2 Restaurant 4m Room Index, RI RI = 2.1m For Ambient LED Lustre RI = L x W Hm x (L+W) 15.2x 4 2.1x (15.2+4) RI = 1.51 Reflection Factors Ceiling- greyish-white Plaster 60% Wall - Brick 40% Floor - Oak light 25% Utilization Factor, UF 0.61

13 Lighting Design Lumens per lamp, F Maintenance Factor, MF Area of Horizontal Working Plane, A MS 1525 Standard Luminance Number of fittings required, N 136 l m² 200 lux For Ambient LED Lustre N = N = E x A F x UF x MF 200 x x 136 x 0.61 x 0.85 N = 14.37~ 14 Conclusion Spacing to Height Ratio (SHR) Zone 2 need 14 fittings of Ambient LED Lustre in order to perform its task with sufficient lighting. SHR = 1 Hm A N SHR = SHR = SHR = 0.99 Spacing between each fixtures (m) S Hm = 0.99 S 2.1 = 0.99 S = 2.08m Number of row fixtures required along the width of the room N = W S N = N = 1.92~ 2 Number of fixtures required in each row N = 14 2 N = 7

14 Layout plan of lighting fixtures Diagram 3; Artificial Lighting Contour Diagram of Ground floor mezzanine generated using Ecotect

15 1. First Floor Mezzanine Floor - Zone 4 Cafe ZONE 4 Location Room Length, L 12.2m Room Width, W Mounting Height of Fitting (from work plane), Hm First Floor Mezzanine Floor - Zone 4 Cafe 6m Room Index, RI RI = 2.1m 2 Head Spotlight LED L x W Hm x (L+W) RI = 12.2 x x (12.2+6) RI = 1.92 Reflection Factors Ceiling- greyish-white Plaster 60% Wall - Brick 40% Floor - Oak light 25% Utilization Factor, UF 0.67 Lighting Design Lumens per lamp, F 500 l

16 Maintenance Factor, MF Area of Horizontal Working Plane, A MS 1525 Standard Luminance Number of fittings required, N m² 200 lux For 2 Head Spotlight LED N = N = E x A F x UF x MF 200 x x 500 x 0.67 x 0.85 N = 25.7 ~ 26 Conclusion Spacing to Height Ratio (SHR) Zone 4 need 26 fittings of 2 Head Spotlight LED in order to perform its task with sufficient lighting. SHR = 1 Hm A N SHR = SHR = SHR = 0.80 Spacing between each fixtures (m) S Hm = 0.80 S 2.1 = 0.80 S = 1.68m Number of row fixtures required along the width of the room N = W S N = N = 3.57~ 4 Number of fixtures required in each row N = 26 4 N = 6.5 ~ 7

17 Layout plan of lighting fixtu Diagram 4 : Artificial Lighting Contour Diagram of First floor mezzanine generated using Ecotect