blowing off steam - tcuf · blowing off steam: a path to sustainability and safety presented by:...
TRANSCRIPT
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Session: 092919
Date: Thursday, September 29, 2016
Time: 3:15pm – 4:15pm
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Blowing Off Steam: A Path to Sustainability and Safety
Presented by:
Morgan Stinson, EEA Consulting Engineers
Mark Guidi, Brandt Companies
Rob Roy Parnell, Texas State System
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This program is registered with the AIA/CES for continuing professional education. As
such, it does not include content that may be deemed or construed to be an approval or
endorsement by the AIA of any material of construction or any method or manner of
handling, using, distributing, or dealing in any material or product. Questions related
to specific materials, methods, and services may be addressed at the conclusion of this
presentation.
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BLOWING OFF STEAMA PATH TO SUSTAINABILITY AND SAFETY
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Agenda
• Introductions
• The Problem With Steam
• The Solution
• Design-Build Delivery Method
• Project Results
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Presenters
EEA Consulting Engineers
Morgan Stinson, PE
The Brandt Companies
Mark Guidi, PE
Texas State System
Rob Roy Parnell, AIA
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The Problem With Steam
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The Problem With Steam
• Inefficient• Combustion Efficiency ~98%
0102030405060708090
100
BoilerEfficiency
StackLosses
ConductionLosses
Age ofEquipment
Fuel toSteam
Efficiency
98
20
310
65
Efficiency Loss
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The Problem With Steam
• Poor Condensate Return
• Typical Campus Returns 40% to 50%
• More Energy Required to Heat Cold Water
• Increased Cost of Boiler Treatment Chemicals
• Comprehensive Trap Maintenance a MUST
• Reduces System Efficiency an Additional 5%
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The Problem With Steam
• Steam Piping Leaks
• Old Piping Subject to Corrosion
• Failure of Direct Buried Insulation
• Creates a Safety Issue for Students and Staff
• Reduces System Efficiency an Additional 5%
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The Problem With Steam
The Net Effect
65% Efficient Drops to 55%
Expensive to Maintain
Unsafe for Students & Faculty
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The Solution
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The Solution
• Condensing Hot Water Boilers• Lower Entering Water Temperature
• Corrosive Flue Gasses Condense in Heat Exchanger
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The Solution
82
84
86
88
90
92
94
96
98
100
60 80 100 120 140 160
Thermal Efficiency vs Return Water Temp
Thermal Efficiency vs Return Water Temp
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The Solution
• Small Footprint• Multiple Manufacturers Have Options to
Fit 2 Million BTUs Through a 3’-0” Door
• Roughly the Size of a Refrigerator
• Excellent For Retrofit Applications
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The Solution
• Additional Benefits• Easy to Implement N+1 Redundancy
• Better Turndown
• Distributing Gas Piping Instead of Steam/Condensate
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The Solution
• Sul Ross State University
• Est. 1917
• Far West Texas in Apline
• Enrollment of 2,000 Students
• Approx. 21 Buildings, 730,000 sq. ft.
• Part of the Texas State University System
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The Solution
• Small Existing Mechanical Spaces
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The Solution
• Well Defined Areas of Construction
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The Solution
• Redundant Boiler on Trailer
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Design-Build Delivery Method
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Design-Build Delivery Method
• At the Time, This Was Most Important Project in System
• Safety, Efficiency, Equipment on Verge of Failure
• Originally Slated as an ESCO Project
• Not Cost Effective
• No Transparency to Owner
• Had to Appeal to Legislature for Funding
• No Strings Attached to Dollars
• System Had to Show They Could Pull it Off
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Design-Build Delivery Method
• Project Needs
• Speed: RFQ Issued Oct. 2011, Substantial Completion August 2012
• Qualified, Deep Team to Serve Remote Campus
• Stay Within Budget
• Minimal Disruption to Active Campus
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Design-Build Delivery Method
• TSUS Determined Best Vehicle Was Brandt as Prime Contractor• Design Build Construction Manager At Risk (DB CM@R)
• Savings goes back to owner
• Single Point of Contact
• Oversaw Design and Construction Process• Design, Construction, and Owner As One Cohesive Team.
• Manage the Design Process with Constructability and Budget Oversight• Team Familiar with How to Efficiently Tackle Each Building
• Self Preform 74% of the Work
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Design-Build Delivery Method: Schedule
Schedule
• RFQ Issued: October 2011• NTP & Commence Design: November 2011• Procure Long Lead Equipment: February 2012• Complete Design: March 2012• Begin Construction: May 2012• Substitutional Completion: August 2012• Start of Fall Classes: August 2012
2011 2012
October November December January February March April May June July August
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Design-Build Delivery Method: Challenges
• Minimal Interruptions to Active Campus
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Design-Build Delivery Method: Challenges
• Logistics• Project Spread Across Campus
• Remote Location
• Workforce Availability
• Proximity of Materials/Deliveries
• Scheduling of Site Meetings
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Design-Build Delivery Method: Challenges
• Existing HVAC Infrastructure• To Incorporate New Boilers Project Included Large Scale Controls Upgrade
• Gain True Efficiency of Boiler Upgrades
• Audit system
• Found Extensive Issues with Existing system.
• Previous Problems Forced SRSU to Cancel Classes
• Utilized In Place Team to Correct System
• Incorporate Existing Issue As Part of Project Budget
• Enhanced Control System Increased Efficiency of Maintenance Department
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Project Results
• On Time, On Budget
• Improved Safety
• Improved Reliability
• Simplified Maintenance
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Project Results
0
5000
10000
15000
20000
25000
Sept Oct Nov Dec Jan Feb Mar Apr May June July Aug
Average Gas Consumption 2009 – 2012 (1,000 mcf)
FY09-FY12
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Project Results
0
5000
10000
15000
20000
25000
Sept Oct Nov Dec Jan Feb Mar Apr May June July Aug
Average Gas Consumption 2013 - 2016 (1,000 mcf)
FY09-FY12 FY13-FY16
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Questions?
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