Buildings Flashcards
Where does energy go in the building?
heating, office euipment, lightining, cooling, other, ventilation, (plug load)
Artificial Lighting
light source efficiency (we want a light that is closely mimicing the sun)
Trends in Office Equipment Energy Use
plug load intensity (W/sf) has increased since the turn of the century
HVAC (definition, US use)
heat ventilating air conditiong, US HVAC energy use = India total energy use (14-16 Quads)
First uses of AC
hospitals, office buildings, movie theaters
1950-1980s Constant volume reheat
Fully Air Conditioned Buildings = Constant Volume Reheat
1980s to present: Variable air volume with reheat
Variable air volume with reheat
What we should do
No reheat
Radiant Heat and Cooling
doing water instead of air could save space b/c heat capacity of water is 3500x of air, (biomimicry: human bodies transport blood (mostly water) rather than air)
Principles of Energy Efficient HVAC (6)
Lower the loads, right size, use simple victorian, use passive sources for hvac, select more efficient equipment, use controls where appropriate
Magnitude of Build Environment Energy Demand
Buildings us 40% of all US Energy
Major Energy End Uses in Buildings
Heating, cooling, lighting, office equip, ventilation
Lighting design strategies
sesnors, daylighting,
Trends in lighting
low initially, ww2 high, have since decreased
Trends in Plug Load Energy Use
increasing since ww2, we should focus on reducing plug load
