Update on Building 7 Information

1
Update on Building 7 Information

• Chelsey, Dan, Mumu,
• Nana, and Scott

2
Outline of Updates

• Information Gathered on HVAC system and Valences
• Placement and Usage of Hobos Assessed
• Usage Model
• Thermodynamic Model
• LEEDs Information

3
HVAC System Design

• 3 Separate Riser Systems
• East (Riser 4)
• West (Riser 12)
• Center (Riser 3)
• Heat only in Light Slot
• Thermostats not marked on provided plans

4
Valence Units

• Created by Edwards
• 16 different models, only 6 of which heat and
  cool
• All valences are 2-pipe
• First pipe for heating / cooling, second for
  drainage
• Therefore, valences run from the same pipe must
  all be heating or cooling

5
Valence Specs

• Heating Specs
• Flow rate .6 1.7 GPM
• Entering temp, 180 F, exiting temp 160 F
• Heat output 1.760 4.986 kW
• Cooling specs
• Flow rate .7 2.1 GPM
• Entering temp, 45 F, exiting temp 53 F
• Heat output .822 2.465 kW

6
Valence Placement

• Three sets of pipes
• First provides for valences on west end
• None in basement, two in zone 105, 2 in zone 212
• Second provides for valences towards center
• 4 in zone 006, 2 in zone 105, 2 in zone 104, 5 in
  zone 213
• Third provides for east end
• 2 in zone 006, 2 in zone 104, 2 in zone 214

7
Hobo Specs

• Building 7 has 2
• Xuan preprogrammed
• Started sampling at 000000 2/22/06, every 15
  minutes. Will run for 27 days
• Unit is a H08-004-02
• External sensor can read 0-2.5V

8
Hobos Interim Plan

• Experimentation before access at Blackstone
• Jordan North Bedroom
• Ceiling and waist-level sensors
• Preview heat stratification with ceiling valences
• Practice modeling a small room

9
Planned Hobo Rotation

• 1)Light Slot
• 1st Floor and 2nd Floor on Bridge
• Light intensity
• Heat stratification

10
Planned Hobo Rotation

• 2)1st Floor
• Lateral temp distribution
• Near main entrance
• East Corner

11
External Sensor Door

• Want a way to monitor heat loss due to door
  opening events
• Two approaches
• Entirely separate sensor
• Using Hobos external sensor

12
Circuit Design

• Want to output signal to Hobo if door has been
  opened during given time period
• Binary counting chip will tally door openings and
  has a reset pin
• Simple counter chip (555) will output a pulse to
  reset counting chip to match Hobo intervals (15
  mins)

13
Circuit Diagram
Materials already in lab Resistors, capacitors,
Binary counter chip components, Power
source Need to be purchased Switch magnetic,
555 chip
14
Planned Hobo Rotation

• 3)1st Floor
• Lateral temp distribution
• East Corner
• West Corner

15
Planned Hobo Rotation

• 4)2nd Floor
• Lateral temp distribution
• Near entrance
• East corner of main room

16
Planned Hobo Rotation

• 5)2nd Floor
• Lateral temp and light distribution
• Near entrance
• East corner of main room

17
Usage Model

• Parking Office has been contacted about staffing
  models, visitor models, and computer usage
• Waiting to hear from Cate re usage of basement
  and 2nd floor

18
Developing Thermodynamic Model

• Estimate R-value of wall assembly
• Build preliminary model
• Define control volume
• Define heat transfer surfaces

19
Estimating R-value of Wall

• Wall is assembly
• Brick (2)
• Concrete (8)
• Sprayed Polyurethane Foam (2.5)
• Air space (1)
• Gypsum Wallboard (5/8)

? R_wall 21.96
20
Assumptions in Building Model

• Use 2nd Floor
• Control Volume
• Operates at steady state
• Heat transfer through Northern, Eastern, and
  Western Walls only
• HVAC system is off
• Windows closed

21
Heat Transfer Surfaces Walls and Windows
Total Window Area 33.44m2
Wall Surface Area 70.70m2
Total Wall Area AreaNorth Wall 2 x AreaE-W
Wall Wall Surface Area Total Wall Area Total
Window Area
22
Internal Temperature
(CUGFOTFL!)
20 computers, 20 people, Toutside 30 degrees-F
? Tinside 94 degrees-F
23
Future Refinements

• Add special conditions
• Roof, Doors (opening), Windows (opening),
  stratification, other airflows
• Incorporate more specific usage data
• Build Mesh

24
LEEDs Standards

• LEEDs standards rate buildings as
• Certified 26-32 points
• Silver 33-38 points
• Gold 39-51 points
• Platinum 52 or more
• The current plans have Blackstone at a projected
  total of 53 points.
• As of January 20, a total of 20 points have been
  completed.
• This leaves 53-20 33 points left to reach the
  maximum projected total, and 39-20 19 points
  left to reach a gold certification.

25
LEEDs contd

• From the administrative summary, a rough estimate
  of 5 more points can be easily obtained and
  certified. These are simple checks, such as
• Alternative transportation, alternative fuel
  vehicles (ZipCar)
• Alternative transportation, bicycle storage and
  changing rooms
• Three of the points (resource reuse, recycled
  content, and use of local materials 50 extracted
  locally) are listed as maybes, so assume these
  points are not achieved.
• This leaves a projected total now of 50, with 25
  points to go, 14 points left to go for gold.

26
Other LEEDs Buildings in the Area

• From the usgbc website, sampled 7 buildings which
  have been accredited.
• Genzyme Center, Cambridge, MA 52 points,
  Platinum
• Pennsylvania Dept. of Environmental Protection,
  Edensburg, PA 45 points, Gold
• Curtis Midwest Regional Headquarters of National
  Park Service, Omaha, NE 40 points, Gold
• White Rock Operations Building White Rock, BC,
  Canada 44 points, Gold
• Herman Miller Building, Zeeland, MI 41 points,
  Gold
• ECHO at Leahy Center for Lake Champlain,
  Burlington, VT 29 points, Certified
• Fisher Pavilion, Seattle, WA 29 points,
  Certified

27
LEEDs Specifics

• The subgroups in the list of standards include
• Innovation and Design Process (3 of 5/5)
• Sustainable Sites (8 of 13/14)
• Water Efficiency (4 of 5/5)
• Energy and Atmosphere (1 of 11/17)
• Materials and Resource (1 of 6/13)
• Indoor Environmental Quality (5 of 14/15)
• Estimates main concern is with
• Energy and Atmosphere (4 points behind goal and
  other LEEDs buildings)
• Materials and Resource (9 points behind)
• Indoor Environmental Quality (about 6 points
  behind)
• This gives a total of 19 points reasonable for
  Blackstone to achieve, bringing our total from 25
  to 44, already at a gold accreditation, and 6
  points away from our maximum goal.

28
LEEDs for ES96?

• Our main concern should be to verify that the
  credits under these three Concern categories
  are completed.