GREEN BUILDING CHAPTER 3 QUESTIONS AND
ANSWERS
Green building - ANSWER refers to a more sustainable approach to site,
design, construct, operate, maintain and renovate a building.
two voluntary endorsement/certification systems - ANSWER Leadership in
Energy and Environmental Design (LEED) developed in US and Building
Research Establishment Environmental Assessment Method (BREEAM) in
Europe.
Leadership in Energy and Environmental Design (LEED) - ANSWER is a
third-party certification program and an internationally accepted benchmark for
the design, construction and operation of high-performance green buildings. As
an internationally recognized mark of excellence, LEED provides building
owners and operators the tools they need to have an immediate and measurable
impact on their buildings' performance.
LEED Criteria Categories - ANSWER 1. Energy and Atmosphere criteria
reduce energy consumption and promote the use of renewable energy. 33
points.
2. Sustainable Sites criteria minimize a building's impact on ecosystems and
water resources. 24 points.
3. Indoor Environmental Quality criteria enhance the comfort of occupants with
access to natural daylight, outdoor views, and better indoor air quality. 19
points.
4.Materials and Resources criteria foster the use of sustainable building
materials and reduced waste. 13 points.
5. Water Efficiency criteria enhance water conservation within the building and
for its outdoor landscapes. 11 points.
Energy Consumption in Buildings: Important Factors - ANSWER - Building
orientation
Determines the ability to manage solar energy for heating, cooling and natural
light.
- Building surface area
Energy loss occurs as a function of the building surface area.
, - Window to wall ratio
Windows increase energy transfer into the building.
Window to Wall Ratio (WWR) - ANSWER as WWR increases, the heating
and cooling energy demand in kWh/m2/yr increases. And the lighting energy
demand decreases, but not significantly (Straube, 2012).
Energy consumption (BTU/Joules/kWh) of a building for heating and cooling
over a 1-year period: - ANSWER EC = (1/R) x A x HDD
R is the resistance to energy transfer arising from construction of the building
envelope.
The inverse of R is the thermal conductivity, which is the flow of BTU through
a 1 ft section of building skin for 1 hour, during which the temperature
difference between the inside and outside of the building is 1 degree
F units of R is: ft2 - degree F - hr/BTU.
SI Units are: m2 - Kelvins/Watt
A is surface area of the building through which energy transfer occurs
HDD (heating degree days) is a function of the temperature difference between
the outside and inside of a building • In winter months, the building envelope
resists the transference of energy from the inside of the building to the outside.
• Conversely, in the summer months, the building envelope resists the
transference of energy from the outside to inside
• The amount of energy needed to heat a home for a year depends on how many
cold days there are in the year, and how cold it gets on each one of those days.
HDD (Heating Degree Days) - ANSWER t = the time over which the
temperature differential occurs, usually in 1/48 days (half hour increments) and
i represents the summation over the course of the year.
TBase = Desired Indoor Temperature
Tamb = T ambient = Outside Temperature (climate in which the building is
located)
TBase − Tamb ≡ 0 if TBase< Tamb
ANSWERS
Green building - ANSWER refers to a more sustainable approach to site,
design, construct, operate, maintain and renovate a building.
two voluntary endorsement/certification systems - ANSWER Leadership in
Energy and Environmental Design (LEED) developed in US and Building
Research Establishment Environmental Assessment Method (BREEAM) in
Europe.
Leadership in Energy and Environmental Design (LEED) - ANSWER is a
third-party certification program and an internationally accepted benchmark for
the design, construction and operation of high-performance green buildings. As
an internationally recognized mark of excellence, LEED provides building
owners and operators the tools they need to have an immediate and measurable
impact on their buildings' performance.
LEED Criteria Categories - ANSWER 1. Energy and Atmosphere criteria
reduce energy consumption and promote the use of renewable energy. 33
points.
2. Sustainable Sites criteria minimize a building's impact on ecosystems and
water resources. 24 points.
3. Indoor Environmental Quality criteria enhance the comfort of occupants with
access to natural daylight, outdoor views, and better indoor air quality. 19
points.
4.Materials and Resources criteria foster the use of sustainable building
materials and reduced waste. 13 points.
5. Water Efficiency criteria enhance water conservation within the building and
for its outdoor landscapes. 11 points.
Energy Consumption in Buildings: Important Factors - ANSWER - Building
orientation
Determines the ability to manage solar energy for heating, cooling and natural
light.
- Building surface area
Energy loss occurs as a function of the building surface area.
, - Window to wall ratio
Windows increase energy transfer into the building.
Window to Wall Ratio (WWR) - ANSWER as WWR increases, the heating
and cooling energy demand in kWh/m2/yr increases. And the lighting energy
demand decreases, but not significantly (Straube, 2012).
Energy consumption (BTU/Joules/kWh) of a building for heating and cooling
over a 1-year period: - ANSWER EC = (1/R) x A x HDD
R is the resistance to energy transfer arising from construction of the building
envelope.
The inverse of R is the thermal conductivity, which is the flow of BTU through
a 1 ft section of building skin for 1 hour, during which the temperature
difference between the inside and outside of the building is 1 degree
F units of R is: ft2 - degree F - hr/BTU.
SI Units are: m2 - Kelvins/Watt
A is surface area of the building through which energy transfer occurs
HDD (heating degree days) is a function of the temperature difference between
the outside and inside of a building • In winter months, the building envelope
resists the transference of energy from the inside of the building to the outside.
• Conversely, in the summer months, the building envelope resists the
transference of energy from the outside to inside
• The amount of energy needed to heat a home for a year depends on how many
cold days there are in the year, and how cold it gets on each one of those days.
HDD (Heating Degree Days) - ANSWER t = the time over which the
temperature differential occurs, usually in 1/48 days (half hour increments) and
i represents the summation over the course of the year.
TBase = Desired Indoor Temperature
Tamb = T ambient = Outside Temperature (climate in which the building is
located)
TBase − Tamb ≡ 0 if TBase< Tamb
