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Optimizing Preservation and Energy Efficiency Through Systems Review
Presented by
Peter Herzog
Herzog/Wheeler & Associates LLP
St. Paul, MN
March 16, 2006
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Optimizing Preservation and Energy Efficiency Through Systems Review
Information derived from
“Methods to Improve Preservation Management in Libraries, Museums and
Archives”By James Reilly, IPI
Rochester Institute of Technology
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Optimizing Preservation and Energy Efficiency Through Systems Review
Optimization:
“A process designed to ensure that each preservation environmental control (HVAC) system continually provides the best environment it is capable of, a the least possible energy use.”
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Optimizing Preservation and Energy Efficiency Through Systems Review
Research Questions:
1. What climate is the existing system capable of delivering on an annual basis?
2. What climate is the existing system actually delivering on an annual basis?
3. Is the system consuming more energy than necessary to deliver the actual climate?
4. What procedures would ensure continual optimal operation?
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Optimizing Preservation and Energy Efficiency Through Systems Review
Research Tasks:
1. Document System Configuration
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Optimizing Preservation and Energy Efficiency Through Systems Review
Research Tasks:
2. Measure System Performance
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Optimizing Preservation and Energy Efficiency Through Systems Review
Research Tasks:
3. Measure Collection Climates
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Optimizing Preservation and Energy Efficiency Through Systems Review
Research Tasks:
4. Analyze the Data Collected
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Optimizing Preservation and Energy Efficiency Through Systems Review
Findings:
Sub-optimal Condition:
Storage space warmer than necessary Causes:
Inappropriate set point selection Supply air set point increased due to occupant
complaint Supply air set point inexplicably increased Winter control schedules operating in summer Reheat coil malfunctions
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Optimizing Preservation and Energy Efficiency Through Systems Review
Unexplained Set Point Changes
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Optimizing Preservation and Energy Efficiency Through Systems Review
Winter Control Schedule in Summer
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Optimizing Preservation and Energy Efficiency Through Systems Review
Findings:
Sub-optimal Condition:
Storage space more humid than necessary Causes:
Malfunctions in chilling system, resulting in elevated dew point temperature
Insufficient reheating
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Optimizing Preservation and Energy Efficiency Through Systems Review
Malfunction in chilling system
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Optimizing Preservation and Energy Efficiency Through Systems Review
Findings:
Sub-optimal Condition:
Storage spaces drier than necessary Causes:
Insufficient maintenance of humidifier
Humidifier disabled
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Optimizing Preservation and Energy Efficiency Through Systems Review
Storage Space Drier than Necessary
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Optimizing Preservation and Energy Efficiency Through Systems Review
Findings:
Sub-optimal energy performance:• Unnecessary sub-cooling and reheating• Excess preheating of outside air• Underutilization of variable speed drives on
supply fans• Unnecessary operation of space lighting
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Optimizing Preservation and Energy Efficiency Through Systems Review
Unnecessary Sub-Cooling and Reheating
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Optimizing Preservation and Energy Efficiency Through Systems Review
Outside Air Dew Points
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Optimizing Preservation and Energy Efficiency Through Systems Review
Underutilized Variable Speed Drive
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Optimizing Preservation and Energy Efficiency Through Systems Review
Energy Costs
Savings Opportunities
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Optimizing Preservation and Energy Efficiency Through Systems Review
People Who Affect Collection Climates
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Optimizing Preservation and Energy Efficiency Through Systems Review
Recommendation:Form a Preservation Environment Management Team
Responsible for:
1. Documenting Systems’ Configuration & Capabilities
2. Negotiating Climate Goals
3. Measuring Actual Performance
4. Quickly Correcting Sub-Optimal Performance