Upgrade to remove ads
Design Science 3 Midterm Terms
Terms in this set (48)
- kilowatt (1000 watts)
"Electricity is measured in kilowatt‐hours (kWh) . One kWh of energy is equal to 1000 watt hours and will power a 100 watt light bulb for 10 hours (100 watts x 10 hours = 1,000 watt‐ hours = 1 kWh)."
- British Thermal Unit - the amount of energy needed to cool or heat one pound of water by one degree Fahrenheit
Power Usage (kWh) =
Power (kW) X Time (hrs)
- 1: the circumstances, objects, or conditions by which one is surrounded
- 2 a: the complex of physical, chemical, and biotic factors (as climate, soil, and living things) that act upon an organism or an ecological community and ultimately determine its form and survival b: the aggregate of social and cultural conditions that influence the life of an individual or community
- 1 a: the practical application of knowledge especially in a particular area : engineering 1 b: a capability given by the practical application of knowledge "a car's fuel-saving technology"
- 2: a manner of accomplishing a task especially using technical processes, methods, or knowledge "new technologies for information storage"
Of or being an indigenous building style using local materials and traditional methods of construction and ornament, especially as distinguished from academic or historical architectural styles.
The use of regional characteristics, as of locale,
custom, or speech, in literature or art.
angle of declination
the angle of the tilt of the Earth's axis with respect to an assumed horizontal plane, one within which the Earth tends to move as it circles around the sun.
an angle that is perpendicular to a plane
angle of incidence
is the angle that the solar ray makes with a line
normal to the surface under consideration.
is the angle used to indicate the bearing of the sun
relative to the north-south axis (typically taken relative to south).
indicates the elevation of the solar ray above the
horizontal Earth plane.
is an indication of the altitude, but as seen in terms of a
sectional cut that is usually based on a building orientation rather than the
sun or the north-south axis
heat always flows from warmer to cooler substances.
total load on a cooling system
the rate at which heat needs to be removed
flow of heat from warmer region to a cooler region
the rate at which heat must be added
combined internal heat loads in a given space
Balance Point Temperature
Tbp = Ttherm - Q i / UA
Ttherm = thermostat setting
Q i = internal gains (people, lights, equipment). Total number of BTUs gained in day
U = material conductance
A = Area
UA = building's heat loss rate per square foot of a building
component (roof, wall, windows)
[ BTU = UA∆T ]
BTUH = Sq.Ft. Area x "U" x ∆T °F
"U" Coefficient = 1 / Total Resistance = 1 / R total
The energy of vibrating molecules in a substance.
the measure of the average vibrating energy in each of the molecules of a substance
temperature at which all molecular motion stops
which relates to temperature change, is heat that
can be sensed and can be measured
measured on a dry bulb thermometer
cannot be sensed since it does not entail any temperature change.
It relates to the energy involved with a change in state or phase change of a
Basic metric unit of heat energy.
the physiological process of maintaining a constant
the bodily process that converts chemical energy (food) into mechanical energy (activity) and thermal energy (heat).
- the transfer of vibrating (thermal) energy between
- As a gas or liquid acquires heat by conduction, the fluid
expands and becomes less dense. It will then rise by floating on top of denser
and cooler fluid.
- the process of emitting energy in the form of waves or
particles. It is not affected by gravity. Four material interactions - transmittance, absorptance, reflectance, emittance
- It is the process whereby atoms or molecules in a liquid state gain sufficient energy to enter the gaseous state (vaporization). It is the opposite process of condensation.
- Capacity to absorb radiant energy into a material
- Capacity of a material to reflect radiant energy
- Emissivity of a material is the relative ability of its surface to emit energy by radiation
- Capacity to transmit radiant energy through a given material
Direct solar gain is based on the Solar
Heat Gain Factor (SHGF corrected by a
Shading Coefficient (SC) to adjust solar
gain through single sheet glass) to:
• temperature during the day
• interior design temperature
• hour of the day
BTUH = Area x SHGF x SC
Transmission gain is based on the
"U" coefficient of the glass and the
which depends on:
• maximum ∆T
• type of glass used
• orientation of glazing
• time, both in terms of the time
of year and hour of the day
BTUH = Area x "U" x ΔTACTUAL
should be installed as close as possible on the the warm side of all thermal barriers
Passive solar heating or cooling
one in which the thermal energy flow is by natural means. Passive systems utilize radiation, conduction or natural convection to distribute energy flow.
Active solar heating or cooling:
Fans or pumps assist in the "forced" distribution of heat.
also refers to the production of electricity through a
conversion of solar energy to electricity through photovoltaic cells
Extraction of heat from deep within the earth (uncommon)
Use of ground just below the surface as a source of heat in winter and a heat sink in summer.
types of airflow
is the bending of light
The apparent speed of light changes
THIS SET IS OFTEN IN FOLDERS WITH...
Design Science 3
Design Science Exam 3 Postell Stone Questions
Design Science Exam 3 Postell Wallcovering Questio…
Jerry Larson Design science chap 1 books terms and…
YOU MIGHT ALSO LIKE...
Design Science 3
Ch 4, Energy and Heat Vocab
Science Chapter 6
OTHER SETS BY THIS CREATOR
BLAW LEGAL ENV TERMS
CHAPTER 5 MILLWORK
CHAPTER 4 CEILINGS
CHAPTER 3 WALLS, PARTITIONS, AND VERTICAL COMPONEN…