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

• 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

• Plans Omitted

Loading Dock
Stockroom
Stockroom
Non- insulated Stair
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Second and Third Floors

• Plans Omitted

Open Stair
Open Offices
Open Offices
Multipurpose Room
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Fourth Floor

• Includes
• Large skylight
• Open stair to third floor

• Plans Omitted

Open Offices
Multipurpose Room
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Time Dependent Insolation Data
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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

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Power from Solar Insolation

• January
• Coldest month
• Total Power _at_ 8 am 36277.58 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

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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
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Winter
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Winter
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Winter
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Summer Cooling
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Summer
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Building Automation System (BAS)

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

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HOBO Time Constant
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Hobo Time Constant

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

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HOBO Data Acquisition
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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

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HOBO Placement

• Inter-floor Stratification
• March 15-17

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Temperature Stratification
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Conclusion

• Upcoming Weeks
• Model Refinement
• Increase data collection and analysis
• Determine whether or not system will work on
  hottest and coldest days of the year