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Environmental Technology 1 > Exam 1 > Flashcards

Exam 1 Flashcards

1
Q

Micro ________
Macro _______
Messo_______

A

Animal/metabolism
Natural/terrestrial
Architecture

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2
Q

Seasons change due to

A

Earth tilted axis

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3
Q

Summer solstice date

A

June 21

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4
Q

Winter solstice

A

December 21

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5
Q

Solar noon

A

Exactly half way between sunset and sunrise

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6
Q

True south

A

Shadows of verticals objects runs true north-south at solar noon

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7
Q

Lowest sun altitude in the summer

A

60*

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8
Q

Which axis is preferable in terms of sun shading

A

North-south

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9
Q

Coriolanus effect

A

Uneven heating on the earth causes swirling currents

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10
Q

Northern hemisphere swirls:

A

Left

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11
Q

Southern Hemisphere swirls:

A

Right

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12
Q

Passive design

A

Using as little energy as possible to achieve thermal comfort and health

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13
Q

Shading coefficient (SC)

A

Measure of heat gain through glass

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14
Q

Lower SC=

A

Less heat gain= more radiation resistant

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15
Q

Heats flows _____ buildings in the summer

A

To

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16
Q

Heat flows _______ buildings in the winter

A

Away from

17
Q

Sensible heat

A

Due to change in temperature

18
Q

Latent heat

A

Due to change in moisture

19
Q

Psychometry

A

Study of thermodynamic properties of wet air

20
Q

Enthalpy

A

Measure of heat in the air

21
Q

Rules of water vapor

A
  1. Keep humid air away from cool surfaces

2. Keep surfaces warm when they’re in contact with humid air

22
Q

Primary factors of human comfort

A 
Metabolic state
Air temperature 
Mean radiant temperature 
Air motion
Humidity
Acclimation
Clothing
23
Q

Metabolism

A

Human process of generating heat

24
Q

clo

A

Measure of insulation clothing

25
Q

Benefit of fans/moving air

A

Increases convective and evaporative heat loss

26
Q

Heat flow is measured in:

A

btu/h OR Watts

27
Q

5 elements of passive solar design

A 
Aperture/window
Absorber
Thermal mass
Distribution
Control
28
Q

Direct gain

A

Space is directly heated by sunlight

29
Q

Short waves

A

Sunlight that directly heats the space

30
Q

Long wave

A

Heat remitted as Infrared

31
Q

______waves can not penetrate glass

A

Longwaves

32
Q

Purpose of building cavities

A

Allows convection to occur in the cavity air rather than the occupied space

33
Q

U-Value

A

Reciprocal of sum of R-values

34
Q

R-value

A

Measured resistance of each material

35
Q

Lower U-value =

A

Slower heat transmits= better insulation = less energy use

Environmental Technology 1 (2 decks)

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