Thermal Comfortv Flashcards
What 4 factors is thermal comfort influenced by
Air temperature, radiant temperatuee, relative humidity, air velocity
What are the 4 stepsto determine pmv and ppd in a space
1 calculate the 4 factora
2 estimate MET and CLO
3 use an online tool to determie pmv and ppd
4 compare pmv and ppd with design objectives
What are the 5 basis of adaptive thermal comfor
Regulating rate of internal heat generation
Regulating rate of body heat loss
Regulating thermal environment
Selecting a different therml environment
Modifying the bodys physiological comfort conditions
Why do we ventulate
To prevent olfactory discomfort, to ensure building does not become a sick building, decrease infection risk, enhance qualifty of life for people suffring with asthma, boost productivity
What three things are needed for ventilation
A supply device, an exhaust device, overflow measures
What three min forces generate ventilation
Wind pressur, stack effect, fans
What is the definition of thermal comfort according to ashrae
The state of mind that expresses satisfaction with the thermal environment
Give some benefits of mechanicl ventilation
Allows ventilation of deep space, heat revcovery is easy
Give so e benefits of natural ventilation
Energy can be low
What is source comtrol in minimisinf source kf pollutants
Avoid smoking, cook electrically, ventilate a lot, remove pollutants close to source with lock exhust
