# Kaplan- Lesson 4: Comfort, Climate, & Solar Design Flashcards

1
Q

A _________ chart is a graph that shows the air at different temperatures and different humidities.

A

Psychrometric

2
Q

The combined storage of sensible heat + latent heat is called what?

A

Enthalpy

3
Q

Seasons are caused by the changing ____ of the earth with respect to the sun.

A

Tilt

4
Q

The sun’s position relative to a given site at a given time of day is described by two angles. What are they?

A

The Altitude Angle (ALT)- height of the sun in the sky

The Azimuth Angle (AZ)- the compass orientation of the sun.

5
Q

What is dew point temperature?

A

The temperature for a given moisture content.

6
Q

What are the four prototypical climates and which one does majority of the US fall into?

A

Cold, Temperate, Hot Humid, & Hot Arid

7
Q

_____ Solar Design uses the sun to heat up the building without any moving parts or pumps.

A

Passive

8
Q

What is a mass wall and what are the two types?

A

A mass wall is a thickened wall directly in the sun light, often behind a large window or wall of glass.

Trombe Wall and Water Wall

9
Q

How does a Water wall work?

A

a tank or collection of large vertical tubes filled with water are placed next to the window inside a building allowing the sun to warm the water.

10
Q

What is the difference between direct and indirect gain?

A

In direct gain, the mass in in the direct path of the sunlight whereas in indirect gain the thermal mass is in the shaded area of a room and heated indirectly.

11
Q

In regards to an active solar system what is a flat plate collector?

A

a flat surface tilted at approximately the right ALT and AZ angles to receive most of the sun’s rays as directly as possible.

12
Q

In regards to an active solar system what is a focusing collector?

A

either a parabolic trough, a parabolic dish, or an arrangement of lenses, which focuses incoming light onto a tube or a point.

13
Q

Would a flat plate collector or a focusing collector be a better choice for an active solar system in an overcast area?

A

Flat Plate Collector

14
Q

The most effective use of active solar systems is to _______.

A

heat water

15
Q

If the MRT (mean radiant temperature) is low, which way does the comfort zone shift?

I. Toward higher ambient temperatures
II. Toward lower ambient temperatures
III. Toward lower relative humidities

A. I only
B. II only
C. III only
D. II and III

A

A. I only

Toward higher ambient temperatures

16
Q

What is the definition of relative humidity?

A. The amount of water in the air in lbs. of water per 1000 cu. ft. of air.

B. The amount of water in the air in lbs. of water per pound of air.

C. The amount of water in the air in grains of water per pound of air.

D. The percentage of saturation at the current temperature.

A

D. The percentage of saturation at the current temperature.

17
Q

What is a sling psychrometer?

A. A chart of the human comfort zone.

B. A chart of air temperatures and humidities.

C. A method of measuring wet bulb temperatures with a manual device.

D. A method of measuring the psychological effects of diurnal temperature variation.

A

C. A method of measuring wet bulb temperatures with a manual device.

18
Q

What is a trombe wall?

A. An unusually heavy mass wall

B. A mass wall that uses water as the storage element

C. A mass wall that causes a convective loop into the room behind it when it is warmed

D. A mass wall that stores energy using phase change materials

A

C. A mass wall that causes a convective loop into the room behind it when it is warmed

19
Q

A good design for a hot arid climate uses which of the following. Check all that apply.

A. Large roof overhangs to screen the sun.

B. Thermal mass to damp out temperature swings.

C. Large openings to the outside to improve ventilation.

D. Evaporation to increase humidity.

E. Dark-colored roofs.

F. Lush landscaping to create a cooling effect.

A

A. Large roof overhangs to screen the sun.

B. Thermal mass to damp out temperature swings.

D. Evaporation to increase humidity.

20
Q

The time of day affects which of the following factors? Check all that apply.

```A. The declination angle
B. The altitude angle
C. The azimuth angle
D. The intensity of the sun
E. The speed of transit```
A

B. The altitude angle
C. The azimuth angle
D. The intensity of the sun

21
Q

Which of the following would NOT cause a change in enthalpy?

A. An increase in the velocity of the air movement.

B. A decrease in relative humidity.

C. An increase in the dry bulb temperature.

D. An increase in the absolute moisture content.

A

A. An increase in the velocity of the air movement.

22
Q

The major benefit to earth sheltered housing is derived from which of the following factors?

A. The thermal storage capacity of the earth.
B. The insulative capacity of the earth.
C. The available moisture in the earth.
D. The weight of the earth.

A

A. The thermal storage capacity of the earth.

23
Q

Which of the following statements is NOT true?

A. Flat plate collectors will continue to function even when they are not pointed exactly at the sun.

B. Focusing collectors can achieve higher temperatures than flat plate collectors.

C. Flat plate collectors can be used for heating water or air.

D. Focusing collectors are easier to mount than flat plate collectors.

A

D. Focusing collectors are easier to mount than flat plate collectors.