4. day lighting nb 1.2 gp batch xvi

D A Y L I G H T I N G GREENSHIP Professional

Eka Sediadi

Greenship Professional Training - Batch 17

(Angkatan 1 tahun 2015)

1. Lighting Aspects in GREENSHIP

2. Day Lighting

3. Day Lighting Calculation

4. Design Sky Values

5. Estimating : Day Light Factor

6. Sun Position

7. Day Lighting Simulation

8. The Visual Environment

9. Glazing

10.Managing Glare

Summary of Training

1

Lighting Aspect in GREENSHIP

1 Lighting Aspect in GREENSHIP

EEC 1.3.2 - Artificial Lighting Lighting design with required lighting power 15% less than

Standard in (SNI 03-6197-2011) 1 point Using high frequency ballasts (electronic) 1 point Lighting zoning (office) with installation of motion sensor 1

point Arm-wide switching placement from door closing position 1

point


1 Lighting Aspect in GREENSHIP

EEC 2 Natural Lighting

Benchmark: 1. Utilizing skylight optimally, minimum 30% of working place

exposed to skylight intensity with minimal 300 lux 2 points.

2. Provision of Lux sensor to automatically switch on Artificial lighting if the skylight intensity below 300 lux 2 points.

Aim: To encourage the use of adequate daylight to reduce energy consumption and recognize building designs that optimize daylight.


1

IHC 5 Visual Comfort

Benchmark: Using lighting with illumination level according to SNI 03 6197-2011 1 point

Aim: To reduce visual disruption from improper lighting for eyes.


1 Lighting Aspect in GREENSHIP Tingkat Kelompok Temperature Warna

Fungsi Ruangan Pencahayaan Renderasi Warm White Cool White Daylight

(Lux) Warna 5300K

Rumah Tinggal Teras 60 1 atau 2 Ruang Tamu 150 1 atau 2 Ruang Makan 250 1 atau 2 Ruang Kerja 300 1 Ruang Tidur 250 1 atau 2 Kamar Mandi 250 1 atau 2 Dapur 250 1 atau 2 Garasi 60 3 atau 4 Perkantoran Ruang Direktur 350 1 atau 2 Ruang Kerja 350 1 atau 2 Ruang Komputer 350 1 atau 2 Ruang Rapat 300 1 Ruang Gambar 750 1 atau 2 Ruang Arsip 150 1 atau 2 Ruang Arsip Aktif 300 1 atau 2 Hotel dan Restoran Koridor 100 1 RSG 200 1 Ruang Makan 250 1 Kafetaria 200 1 Kamar Tidur 150 1 atau 2 Dapur 300 1

SNI 03 6197-2011


Solar Spectrum

2 Day Lighting

Source : http://eetd.lbl.gov

The importance of Daylighting

2 Day Lighting

Priceless light source Adjustable light source Cue for bodys biological

clock (Circadian Rythm) Zeitgeber

2 Day Lighting

Jakartas Typical Daylight Availability

Source : gaisma.com

SUNSHINE OFFICE HOURS

2 Day Lighting

Why consider daylighting?

Human consideration

Psychological connection to outdoors

Improve occupants health and well-being

Improve worker productivity

Improve occupants satisfaction with indoor environment

Source : www.lightlouver.com

2 Day Lighting

Why consider daylighting?

Architectural consideration

Energy Ef ficiency consideration

Space definition

Establishes character of space

Establishes exterior expression

Source : www.lightlouver.com

Lighting a major building load and cost

Reduces coincident peak electrical demand

Daylight Factor (D.F. ) = 100 x (Ein / Eout)

Calculation

3 Day Lighting Calculation

Ein = illuminance at a point inside

interior space (lux)

Eout= illuminance at a horizontal plane (outdoor) with unobstructed view of the hemispheric sky (lux)

Daylight Factor (D.F. ) = 0.1 x P

Simple Rule of Thumb approach


P = Percentage Glazing to Floor Area

Example : For a room of 100m2 and 20m2 glazing, then the daylight factor will be 2%

Table 1. Daylight factors and distribution

Zone DF (%) Distribution

Very bright > 6 Very large with thermal and

glare problems.

Bright 3 6 Good; glare control required

Average 1 3 Good / Fair

Dark 0 1 Poor

Note: The figures are average daylight factors for windows without glazing

Clause 4.4.1

The average daylight factors may be obtained by simulation or architectural modelling of a building design.


0.75m

Direct component SC

Internal reflected component IRC

Ein (lux)

DF = SC + ERC +IRC

External Reflected component ERC

Eout (lux)

DAYLIGHT FACTOR IS A SUM OF THREE COMPONENTS.

DF = Daylight factor at a point internally

SC = sky component (direct from visible part of sky at window)

ERC = externally reflected components (indirect external light)

IRC = internally reflected components


Modification to the Day Light Model

Components of Day Light in interior space

(a) = Direct Sunlight

(b) = Direct Sky Light (visible portion of sky)

(c) = Externally Reflected Lights

(d) = Internally Reflected Lights

Concepts


IN DAY LIGHT FACTOR (D.F.) ESTIMATION, SIMPLIFICATION TO

THE PREVIOUS MODELS ARE MADE.

CIE Uniform Sky Model; Assumptions

(a) Direct Sunlight is not present (i.e. general uniform sky).

(b) Outside lighting conditions are uniformly bright.

(c) All external lighting conditions therefore contribute

uniformly to D.F. in the interior space.

Concepts


Daylight factor can be estimated

1 IES formula DFm, IES = ( Awindow U * 100 ) / ( Afloor )

2 BRE formula DFm, BRE = ( Awindow M t ) / ( Atotal ( 1 - m ) )

Awindow Surface area of the window, excluding frame, bars and other obstructions [m]

Afloor Floor area of the room [m]

Atotal Total internal surface area of the room [m]

Factor to account for external obstructions

U Utilisation factor

Angle of visible sky from the mid-point of the window []

M Maintenance factor of the window

T Transmission factor of the glazing

m Average reflection factor of all internal surfaces

Estimating

5 Estimating Daylight Factor

To estimate the DF in the centre of an atrium floor a simple three-step calculation as outlined below:

1. Calculate the well index (WI) using numbers representing height, width and length of the atrium.

WI = ( height * (width + length) ) / ( 2 * length * width )

2.Calculate the horizontal DF (%) at the centre of the atrium floor (open atrium).

DFunglazed = 100 * e-WI

3.For a glazed atrium estimate the transmission factor () of the glazed roof and multiply the calculated DF with it.

DFglazed = * DFunglazed

Daylight factor in Atrium


A IES Formula DFm, IES = ( Awindow U * 100 ) / ( Afloor )

B BRE Formula DFm, BRE = ( Awindow M t ) / ( Atotal ( 1 - m ) )

C Sumpner Formula DFm, Sumpner = ( Awindow M t ) / ( 2 Atotal ( 1 - m ) )

L B Height

1 Dimensions of Room 6 6 2.7 M

2 Area of Room AFLOOR 36.00 M

3 Area of Room Surfaces AS 136.80 M

4 Utilisation Factor U 0.5

5 Obstruction Factor 0.4

6 Maintenance Factor M 1

7 Glazing transmission t 0.7

8 Average surface reflectance 0.56

9 Angle of visible sky 1.6 rad. 90.0 10 Reflectance of room surfaces Ceiling Wall Floor

80% 60% 40%

11 Enter a Target DF DF 3.5%

IES BRE Sumpner

12 Estimate Area of Window AWINDOW 6.30 3.00 3.85 M

Awindow Breadth Length

13a Enter Size of Window 4.5 1.5 3

13b Daylight Factor DF 2.5% 5.3% 4.1%

Estimating


London, Latitude 52 N Trivandrum, Latitude 8 N

Sun Position

6 Sun Position

Is this a Daily OR Annual SunPath?

Sun Position

6 Sun Position

Is this an Annual OR Daily SunPath?

Sun Position

6 Sun Position

Simulation

7 Daylight Simulation

Simulation

7 Daylight SImulation

Simulation


Daylight Visualizer

Download: http://www.velux.com/Daylight_Visualizer/Download


Day Light Visualizer: March 21 at 1200noon.

Visual Acuity is

separated into 3 Zones:

(a) Task zone

(b) Immediate

surrounding (desk)

(c) General surrounding.

The Visual Environment

8 Visual Environment

1. Visible light transmittance % of

visible light passing through

2. Visible reflectance; % of visible

light reflected

3. SHGC (Solar Heat Gain Coeff)

or SC (Shading Coeff); ratio of

solar incident heat to solar

heat transmitted.

Glazing Properties

9 Glazing

Glazing Properties

1. Visible light transmittance % of visible light passing through

2. Visible reflectance; % of light reflected

3. SHGC (Solar Heat Gain Coeff) or SC (Shading Coeff); ratio of

solar incident heat to solar heat transmitted.

4. U Value; heat transfer property due to outdoor/indoor temp.

difference W/M - K

5. R-Value is resistance to heat transfer = 1/U.

6. UV Light Transmittance; % of UV lights passing through.

7. Spectral Selectivity: Ability to react selectively to different

wavelengths of light.

8. Glazing Colour: visible light filter affecting colour/tint of glaze.

9. Sound Transmission: ability to transmit sound.

9 Glazing

The UGR takes into account

(1) brightness of wall and

(2) Luminaire contributing to

glare.

Glare Index is essentially the ratio of the brightness of a light source over the brightness of the background.

Managing Glare

UGR: Unified Glare Rating Lb: Luminance Background (Cd/m2) L: Luminance of the Luminous Parts of Each Luminaire

: Solar Angle of the Luminus Partd of Each Luminaire P: Guth Position Index

10 Managing Glare

Direct Glare glare resulting from high luminance of lamps

and/or insufficiently shielded lamps.

Indirect Glare reflected from surfaces which are highly

specular e.g. monitor screens

Managing Glare

10 Managing Glare

Managing Glare

10 Managing Glare

Glare Control Device Louvres and Blinds

Optical Diffusing Blinds/Louvres

10 Managing Glare

Glare Control Device Spectrally Selective Glazing

Ideal glaze targets photopic response Actual glaze tinting

10 Managing Glare

Changi Airport Singapore

Changi Airport Singapore Detail Skylight

Ir. H.P. Looi ([email protected]) 25th June 2010

Harvesting Daylight

Light Shelves to Bring Light into Interior Space

Ir. H.P. Looi ([email protected]) 25th June 2010

Harvesting Daylight

Daylight (Pencahayaan alami)

- Posisi Jakarta, 6 11 Lintang Selatan, 106 50 Bujur Timur - Manfaatkan Diagram Matahari untuk mencari kedudukan Matahari (Zenith

dan Azimuth) pada waktu tertentu

- Minimal tentukan kedudukan Matahari pada bulan Desember, September/Maret dan Juni mulai jam 8.00 s/d 16.00 sore

- Jadikan dasar usulan untuk modifikasi rancangan selubung bangunan

- Rule of Thumb 1 (tropis) : kedalaman maksimum penetrasi cahaya matahari langsung diterima ruang = 2.5 x tinggi jendela

- Rule of Thumb 2 : DF = 2% bila per hari 10% luas lantai dikenai cahaya matahari langsung

- Masukkan cahaya mendekati langit-langit, jangan pada ketinggian mata manusia

- Masukkan cahaya matahari diffuse, bukan direct

- Sedapat mungkin gunakan jendela vertikal hanya pada orientasi U dan S

- Hati-hati dalam memilih tipe kaca selubung

Diagram Matahari untuk Jakarta dan sudut-sudut datang sinar matahari harian pada bulan Desember dan Juni pagi dan sore hari (Denah)

Sudut datang sinar matahari harian 22 Desember, 22 Sept./Mar. dan 22 Juni

jam 8, 12 dan 16 sore (tampak Selatan, Utara, Barat dan Timur).

Utara Sketsa Tampak Selatan

THANK YOU

4. day lighting nb 1.2 gp batch xvi

Documents

day lighting source

improper lighting

lighting aspects

point lighting aspect

day lighting simulation

day lighting calculation

natural lighting benchmark

required lighting power