Exam #1 Flashcards
What is a system?
Combines interrelated interacting artifacts designed to work as a coherent entity.
MEP/FP
Mechanical, Electrical, Plumbing, Fire Protection
Mechanical
Heating, air conditioning
Mechanical System Example
HVAC, Plumbing, Fire Protection
Electrical
lighting. power
Electrical System Example
Power Distribution, lighting, low voltage
Plumbing
toilets, sink
Fire Protection
Sprinkler systems
Animal Skeleton –> Building System
Skeleton- Structure
Skin- Envelope
Blood Circulation- Heating/Cooling Systems
Nervous System- Electrical
Digestive System- Plumbing
HVAC
Heating, Ventilation, Air Conditioning
Temperature
Measurement of stored energy.
Heat
Energy that is transferred from one body to another.
BTU
British Thermal Unit (Measurement of Energy). The amount of heat it takes to heat up one pound of water one degree in one hour. Similar to the flame of a birthday candle.
Ton
Measurement of energy
Amount of energy it takes to melt one ton of ice in one hour.
How many BTU makes up a ton?
12,000 BTU = 1 ton
Radiation
Thermal- between two bodies that aren’t conducted. ( the Sun and Earth)
Conduction
Heat transferred to a new solid. One hot, one cold, even out in temperature.
Convection
Heat transferring to a liquid.
Six S’s
Skin, Structure, Systems (heat, power, etc.), Space dividers (walls, doors, etc.), Stuff (Furniture), and Site.
How do buildings interfere with people?
- Comfort
a. lighting
b. temperature
c. humidity
d. drafts
e. acoustics
2.Building functions dictate interior - Safety
- Quality of life
Where does heat come from inside a building?
Envelope- Sun shining through glass
People- heat, moisture
Lighting/equipment
Dry Bulb
Actual air temperature
Wet Bulb
Amount of Moisture in the air
Sick Building Syndrome
When a building did not have enough ventilation, all contaminates stayed in the building.
What causes sick building syndrome?
Lack of fresh air (ventilation)
Smoking
VOC- Formaldehyde in materials and finishes
IAQ
Indoor Air Quality
Code driven, as important as ADA
CFM
Cubic Feet per Minute (FT^3/min.)
Air moving, size of a basketball
What is the rule of thumb for CFM?
1 CFM per square foot of space
Refrigeration cycle
Study Diagram
Types of Air Conditioners
Window, rooftop, Split system
Heat Pump
Reverse Refrigerant Cycle
Water Cooled Systems
Water pulls away heat faster
Air Cooled Systems
Fans are used to cool down
Greenwashing
Making something seem more sustainable than it actually is
Hydronic System
Study Diagram
4 Pipe System
one pipe supplies cold water, One pipe supplies warm water, one pipe pulls out cold water, one pipe pulls out warm water.
Radiant floors
Piping under finished floor using warm water to heat up the floor.
Radiant panels
Ceiling panels, wall panels, under desk mobile panels.
Forced air systems
heaters and ductwork
Diffusers
Round, square, linear slot, linear bar grilles
Coanda Effect (diffusers)
Air spreads across the ceiling mixing in new air.
Linear Slot Diffuser
Applied near windows
Linear Bar Grilles
Full meatal architectural features, applied near windows.
Baseboard heaters
Electric or hot water
Things above the ceiling
Ductwork, pipes, VAV boxes, fan powered boxes
VAV Boxes
Variable Air Volume- used to control space temperature by changing or varying the air volume.
Fan Powered Boxes
Used when main system is off usually at night. Heats/cools perimeter of a building.
VRF
Variable Refrigerant Flow- multiple indoor units with one outdoor unit.
Ground Source HVAC
Geothermal- utilizes the ground to absorb and store heat.
Green Initiatives
Premium efficient equipment, CO2 monitoring
Underfloor Systems
12” spacing under the finished floor to allow clean air to come through vents on the floor pushing the old air out through vents on the ceiling.
Churn
When offices change from one office type to another
What is the purpose of solar design
Free heating
Solar design principles
Solar angles based on the season
Overhang
Light shelf for South facing walls, effective for indirect light, direct solar heating, shading at high solar angles.
light Shading
Blocks direct summer sun, allows winter sun to warm, extends daylight in a space.
Mass Wall
Uses the mass of the building to heat at night
Trombe Wall
Study Diagram
Domestic Hot Water
The sun heats water through a tank on the roof. Not good for cold climates.
Evacuated Tubes
Heat water in the tubes, can be used in cold climates.
Steam generation
Uses steam to heat up a space. Study Diagram
Heliostats- mirrors that move with the sun
Photovoltaic
Calculator style of solar power
Wind Turbines
Windmills, the sun is what creates wind