ENG404

26 cards·by AgroLeprechaun

What is Building Physics

The discipline of designing comfortable buildings that use minimal energy by applying physics and construction engineering.

What is a building envelope?

A physical seperator between indoors and outdoors such as a window, wall, door, ceiling or floor.

What is the difference between sensible and latent flows?

Sensible flows are the change in temperature, latent is the change in moisture.

What is thermal mass?

Thermal mass is the measure of a materials resistance to changing temperature and is dependant on the materials thermal capacity.

Name 4 sources of external loads.

Heat condution via the building envelope, solar radiation via windows, air loss through leaks, and fresh air intentionally introduced.

Name 5 internal loads

Hvac systems, water heaters, computers, appliances, people.

List the 5 energy analysis tools

HAP, TRACE, DOE-2, BLAST, EnergyPlus

Name 4 climate considerations when designing building envelopes

Temperature, Humidity, radiant heat, Air movement

What is the difference between wet and dry bulb?

Dry is measured only by temperature, wet utilises humidity

What is the Dew point?

The temperature at which water will condensate

List the 5 basic principles of air movement

velocity, direction, pressure, density, venturi effect

List 4 Environmental thermal comfort factors

Air temperature, relative humidity, radiant temperature, air velocity

List 2 personal thermal comfort factors

metabolic rate and clothing levels.

Name the two primary components of solar radiation

Direct beam radiation and diffuse radiation

Name the 2 things the intensity of solar radiation is dependent upon

Cloud cover and angle of the surface to the sun

Name the 3 things that determine insolation

Amount of energy absorbed, amount of energy transmitted, and amount of energy reflected

List 5 Passive design options for Daylighting

Daylight envelopes, massing and orientation, aperature design, redirecting light, glazing

Which orientation of a building provides the greatest ventilation

Short axis with greater length side perpendicular to the wind

Attributes of hard low emittance coating

Applied to glass ribbon using a baking process, less expensive, less effective

Attributes of soft low emittance coatings

applied in a vacuum, easily damaged, subject to oxidation degradation, more expensive, better thermal performance

Is an efficient HVAC system essential for a green building?

yes

What is the aim of WSUD

To improve the quality of water run off, lower the peak flow of water runoff

What is Grey water? What is Black water?

Greywater is water runoff that has not been contaminated by human products, black water is water contaminated with food or human waste

what are the uses of treated greywater?

Cleaning, Cooling, Toilets, Irrigation

What are the uses of treated black water?

irrigation

What is BIM?

Building information modelling; a digital representation of a physical characteristics of a structure