U N I V E R S I T Y O F V I R G I N I A A R T M U S E U M C h a - - PowerPoint PPT Presentation

U N I V E R S I T Y O F V I R G I N I A A R T M U S E U M

C h a r l o t t e s v i l l e , VA

L a u r e n B e g e n

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S AT E L L I T E P H OTO 1 5 5 R u g b y R o a d

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S I T E P L A N 1 5 5 R u g b y R o a d

Predicted: Azimuth: 220 Altitude: 32

S U N PAT H P r e d i c t e d

27 235

S U N PAT H A c t u a l

3 - D M O D E L + S U N PAT H S I M U L AT I O N F i x e d V i e w

9.7.2010 2PM EXTERIOR LOOKING IN 9.8.2010 6:30PM INTERIOR LOOKING OUT

3 - D M O D E L + S U N PAT H S I M U L AT I O N A n i m a t i o n s

SOLSTICE December 21st SOLSTICE June 21 EQUINOX September 21st EQUINOX March 21st

R-VALUES Section Cut at Window Exterior Air .17 Glass .91 Interior Air .68 TOTAL 1.76 Section Cut at Brick Wall Exterior Air .17 Brick - 12 inches 2.4 Plaster .15 Wood Sheathing -3/8” .47 Interior Air .68 TOTAL 3.87 ANALYSIS: Based on limited access to interior temperatures, the design R-values do seem accurate. At 2pm on 9.7.2010, the exterior temperature was 88F and the interior temperature was 80F. Although cooler than the exterior temperature, the interior temperature is warmer than one would expect of a conditioned

• building. The low R-value of the section cut at the window and

door indicates that there is little to prevent heat from moving through this wall. Because the glass window and door nearly span the length of the entry vestibule, the higher R-value of the brick does not help signifjcantly to keep this space cool.

T H E R M A L R E S I S TA N C E

EXTERIOR 71 86 82 EXTERIOR 71 82 90 EXTERIOR 71 82 90 INTERIOR 73 78 75 ANALYSIS: Thermal imaging reveals the same ineffjciency of the glass windows and door found in the design R-value. Constructed in 1933, the door and windows appear to be original. To improve thermal resistance, the single-pane glass door and window could be replaced with a more effjcient double-pane glass. Less invasive measures, such as hanging curtains along the windows, would also help. Another measure would be to increase the conditioning of the interior vestibule to create an air barrier between exterior and

• interior. During the summer

months, a constant fmow of cold air blowing down behind the entrance would keep warm air from moving

• in. In the winter months, a constant

fmow of warm air in this same position would keep the warm air from escaping to the exterior.

T H E R M A L I M A G I N G O c t o b e r 1 2 t h 2 0 1 0 3 p m

M I C R O - C L I M AT E D I A G R A M S

VEGETATION + SUN Vegetion plays a critical role in shielding the building entrance from mid-day sun. A recent removal of several large trees removes this shield, exposing the building to increased sun. In both cases, the sun creates a warm micro-climate, but in the latter the micro-climate will most certainly reach uncomfortable levels. WIND North and NW winds are blocked by the

• rientation of the building.

Without air circulation during hot weather, the space can become

• unpleasant. It can also

provide comfort during the evening by increasing the retention of heat in the bricks and creating a warm micro-climate.

M I C R O - C L I M AT E D I A G R A M S

Vegetion plays a critical role in shielding the building entrance from mid-day sun. A recent removal of several large trees removes this shield, exposing the building to increased sun. In both cases, the sun creates a warm micro-climate, but in the latter the micro-climate will most certainly reach uncomfortable levels. Heat retained by the material of the building during the day (brick and stone being primary heat retainers) is released slowly after the sun sets. On a warm day, the retention of heat causes a hot and uncomfortable micro-climate, but in the cooler evening hours it creates a warm, comfortable micro-climate. RETAINED HEAT + TIME OF DAY

P S Y C H R O M E T R I C C H A R T S

9.7.2010 2PM

i e e e

9.8.2010 6:30PM 9.7.2010 10PM ANALYSIS:

The interior temperature at the only time measured, 2PM, was within the range of comfor t. However, in the event of a more extreme high exterior temperature, this would not likely be the case. The exterior temperature at 2PM was not within the comfor t zone due to the building being in direct sunlight. This condition will be exacerbated by the recent removal of several large shading trees in front of the Ar t Museum. Re-planting will be critical to avoiding extremely uncomfor table conditions in this space. At present, the exterior space

• nly becomes more comfor table later in the evening. By 10pm, it falls within the comfor t
• zone. The sun no longer produces excess heat, but the brick has retained some of that

daytime heat maintaining a comfor table degree of heat in the cooler night-time temperatures.