Blackstone Building 10B

1
Blackstone Building 10B

• Jarred Brown Crystal Schuil
• Michael Drewniak Tom Sze
• Isaac Ochieng Greg VanLear

2
Overview

• Goals
• Building 10b Setup
• Project Status
• Insolation and Humidity
• Modeling
• HOBO Analysis

3
Goal

• Can it handle the coldest and hottest days?
• Design an operation model
• The HVAC system
• The AHU (Air handling unit)
• Space and Time dependent
• Approach
• Entire building
• Different aspects
• Different floors
• Compare with the BAS control algorithm

4
Priority

• Comfort
• Temperature
• Humidity
• Luminosity
• Fresh Air
• Cost

5
Blackstone Grounds
Building 10B
6
Basement and First Floor
Loading Dock
Stockroom
Stockroom
Non- insulated Stair
7
Second and Third Floors
Open Stair
Open Offices
Open Offices
Multipurpose Room
8
Fourth Floor

• Includes
• Large skylight
• Open stair to third floor

Open Offices
Multipurpose Room
9
Time Dependent Insolation Data
10
Power from Solar Insolation

• Includes S-W-E Walls and Roof
• Brick Absorptivity 0.7
• Window Absorptivity 0.5
• 1/3 Surface Area
• White painted roof Absorptivity 0.2
• Sources
• http//www.bia.org/html/frmset_thnt.htm
• http//www.stevensroofing.com/Energy/Energy_ASHRAE
  .htm

11
Power from Solar Insolation

• January
• Coldest month
• Total Power _at_ 8 am 36278 W
• July
• Hottest month
• Total Power _at_ 8 am 70118 W

12
Dehumidification

• Each person requires about 10 W of power to
  dehumidify the air they exhale
• 6 L/min
• 12 0C dew point
• 37 0C exhalation
• Completely humidified air exhaled

13
Dehumidification

• 5000 cfm air inlet
• Assume very bad day 98.0o F, 100 humidity
• 12.0C dew point
• 230 kW to dehumidify intake air
• Drops to 100 kW for 80.0 oF air, 100 RH

14
Modeling
15
Winter
16
Winter
17
Summer Cooling
18
Summer
19
Building Automation System (BAS)

• Discharge Air Temperature / Humidity Setpoint
  Control
• BAS determines air temp. setpoint (adj.) based on
  indoor/outdoor conditions

20
HOBO Time Constant
21
(No Transcript)
22
(No Transcript)
23
Hobo Time Constant

• Estimated to be 384 seconds cooling, 318 seconds
  warming
• Approximately 6 - 6.5 minutes, taking an average

24
HOBO Data Acquisition
25
HOBO Placement

• Placed on second floor main room
• 3 HOBOS
• Vertical and horizontal temperature
  stratification
• Basement
• 1 HOBO
• Gain basic understanding of how basement works

26
(No Transcript)
27
HOBO Placement

• Inter-floor Stratification
• March 15-17

28
Temperature Stratification
29
Conclusion

• Upcoming Week
• Determine whether the system will work on hottest
  day of the year.
• Model Refinement
• Incorporate inter and intra-floor temperature
  stratification.
• Data Refinement
• Absorbptivity constant, R Values, of light
  fixtures