Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
19 Cards in this Set
- Front
- Back
|
U Value |
Thermal Transmittance. Less is better. |
|
|
Relative Humidity - 100% |
When dry and wet bulb temperatures are equal. |
|
|
Max Airspace in wall assembly |
4" - otherwise a convective air loop forms. |
|
|
Sensible Heat |
Temperature we can feel, normally temperature that is measured. Dry bulb. |
|
|
Latent Heat |
Embodied energy in moisture in the air. Energy required for water to change state. |
|
|
Enthalpy |
Total heat content of Air. |
|
|
Relative Humidity |
Total moisture in the air now in relation with the the maximum amount of moisture the air can hold at the current temperature. |
|
|
Conduction |
Heat transfer through solids. U- and R- values. |
|
|
Radiation |
Electromagnetic Energy |
|
|
Convection |
Heat transfer within a fluid. Gas and liquid are fluids. |
|
|
Solar Altitude |
Sun's angle above the horizon |
|
|
Asimuth |
Sun's position relative to cardinal points. (N, S, E, W) measuring in degrees from south. |
|
|
High thermal resistance in insulation due to what? |
Air bubbles. |
|
|
ERV (HVAC) |
Energy Recovery Ventilator, capture the heat that is exhausted and use it to pre-heat the fresh air intake. It can be used to remove the moisture from the air. |
|
|
Building Balance Temperature |
Outside temperature when building's heat gains are equal to heat loses. |
|
|
Condenser Coil |
Warm, near the valve. |
|
|
Evaporator |
Low Pressure, cold, near the compressor. |
|
|
Efficacity |
Fluorecent Lights Tubes T-5 and T-8 most effcicient |
|
|
Pressure required to lift water vertically 1 foot |
0.433 psi |
