Daylighting Sources and Components

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What is the primary objective of daylighting design?

To increase the amount of HVAC costs

To minimize the amount of artificial light and reduce electricity costs (correct)

To increase the use of artificial lighting

To reduce the amount of natural lighting

What is the effect of natural lighting on HVAC costs?

It has no impact on HVAC costs

It depends on the type of HVAC system

It increases HVAC costs

It lowers HVAC costs (correct)

What is the formula to calculate internal illuminance?

Internal illuminance = (Daylight factor / External illuminance) x 50%

Internal illuminance = (Daylight factor x External illuminance) / 100% (correct)

Internal illuminance = (Daylight factor x External illuminance) / 50%

Internal illuminance = (External illuminance / Daylight factor) x 100%

What does IRC represent in daylighting design?

Reflected skylight and groundlight Signup and view all the answers

What is the recommended daylight factor for a kitchen?

2% Signup and view all the answers

Under what sky conditions are the guidelines for initial daylighting design assumed?

Overcast sky conditions Signup and view all the answers

What is the ERC formula based on?

SC × RD × RF Signup and view all the answers

What is the distance beyond which a zone will receive virtually no daylight?

30 ft Signup and view all the answers

What is the purpose of the Sidelighting and Toplighting Daylight Factor Guideline?

To determine daylight factor values Signup and view all the answers

What is the CIE method based on?

The daylight factor applied to the standard overcast CIE sky Signup and view all the answers

What is the Graphic Daylighting Design Method (GDDM) used for?

To assess qualitative and quantitative aspects of daylighting design Signup and view all the answers

What is the 15/30 guideline based on?

Sufficient daylight delivery to the desk plane Signup and view all the answers

What is the primary purpose of understanding the components of daylight in building design?

To select the appropriate materials and design apertures Signup and view all the answers

What is the sum of the three components that make up the Daylight Factor (DF)?

SC + ERC + IRC Signup and view all the answers

What is the assumption made by the 2.5H guideline in terms of daylight delivery?

Daylight is delivered at a depth 2.5 times the height of the window above the desk plane Signup and view all the answers

What is the Externally Reflected Component (ERC) of daylight illuminance?

The light reflected from exterior obstructions on to the point under consideration Signup and view all the answers

What is the purpose of the 15/30 guideline in daylighting design?

To calculate the Daylight Factor (DF) for a given location Signup and view all the answers

What is the formula to calculate the ERC in a given scenario, where 25% of the sky is obstructed by a building with a 20% RF?

ERC = SC × 0.25 × 0.20 Signup and view all the answers