Thermal Comfort Flashcards
_____ ____ is the thermal transfer from our bodies to the surrounding enviornment at the same rate we generate excess heat without undue stress
Thermal Comfort
What are the 3 factors that affect human thermal comfort?
Enviornmental Factors
Individual Factors
Psychological Factors
These are all examples of _____ factors affecting human thermal comfort
Air temperature
relative humidity
mean radiant temperature
air motion
air purity, sound, vibration, and light
Enviornmental Factors
These are all examples of ____ factors affecting human thermal comfort.
Metabolism
Perception
Physiology
Individual Preferences
Individual Factors
These are all examples of ______ factors affecting human thermal comfort
Color
Texture
Sound
Light
Movement
Scent
Psychological Factors
These are all examples of of ____ _____
Conduction
Convection
Radiation
Heat Transfer
The window frame material is highly heat resistant and has insulating properties: heat will no transmit through the frame material and be lost to the cooler exterior. this is an example of
Conduction
Low-E coated insulating glass prevents heat ____
Radiation
An air-tight window design is the answer here. look for a strong, durable seal, tightly-welded seams and sturdy hardware. This is an example of?
Convection
How can Thermal Radiation be manipulated?
Controlling sun penetration
using thermal insulation inside walls and ceilings
insulating window with mulitple layers of glass or window treatments
Heating large floor or ceiling surfaces
How does heat work in forced air heating?
Heat comes from a vent some is lost through the windows it gets cooler up bounces off the ceiling and goes back through the return vent at a colder temperature
How does Radiant floor heating work?
the floor is heated and it gets colder the higher it gets
True or false?
Thermal radiation can also be increased by?
Heating small surfaces such as:
Electric filaments
Ceramic tiles
metal stoves
fireplaces
True
_____ ______ is also the mechanism by which mechanical heating and cooling equipment deslivers thermal comfort
Heat Transfer
What dos MRT stand for?
Mean Radiant Temperature
____ is affected by large glass areas, the degree of insulation, hot lights, and other factors
MRT
What does RH stand for?
Relative Humidity
These are examples of _____ ______
Stratification
Draft
Air Movement
____ is varying air temperatures from floor to ceiling
Stratification
_____ is excessive air motion that produces localized cooling of a building
Draft
A unit of _____ _____ is the amount of energy required to cause a specific change in temperature of a specific quantity of a material
Thermal Energy
The same quantity of thermal energy added to different quantities of the same material will result in ______ temperatures
different
______ ______ is measure in British thermal units (BTUs), calories, or Calories (kilocalories).
Thermal Quantity
What does BTU stand for?
British thermal units
______ _______ is measured as temperature in degrees farenheit and celsius
Thermal intensity
white paint and reflective glass are good examples of what thermal properties of materials?
Reflectance
Mass and dark colors are good examples of what thermal properties of materials?
Absorptance
________ is transmitting radiant energy
Transmittance
______ is raditation of stored heat
Emittance
_______ retard the flow of heat and are good thermal barriers
Insulators
______ encourage heat flow and make good thermal storage materials
Conductors
Which of the following best describes this statement?
“Is the ability of a material to store heat”
1) Thermal Capacity
2) Thermal Mass
3) Thermal Lag
1) Thermal Capacity
Which of the following best describes this statement?
“Are masses of high thermal capacity”
1) Thermal Capacity
2) Thermal Mass
3) Thermal Lag
2) Thermal Mass
Which of the following best describes this statement?
“Is the delay of heat transmitted through a wall”
1) Thermal Capacity
2) Thermal Mass
3) Thermal Lag
3) Thermal Lag
