The Museum of Science & Industry undertook a major mechanical design effort to preserve the historic U‑505 submarine in a controlled indoor environment. Engineers needed a system capable of managing temperature, humidity, and space constraints while avoiding inefficient over‑cooling and reheat strategies. A Pinnacle® Primary Ventilation and Energy Recovery System was selected to deliver precise conditioning and long‑term preservation performance.
Key Facts
- Restoration launched in 1997
- Exhibit located in a 75 ft × 42 ft underground space
- Required delivery of 20,000 CFM of conditioned outdoor air
- Existing chilled water system provided only 44°F supply temperature
- Pinnacle® system includes: passive dehumidification wheel, total energy recovery wheel, cooling coil, heating coil, humidifier
- Operates with 100% outdoor air during suitable weather
- Operates with 50% outdoor air when museum is closed
- Museum climate challenges include hot/humid summers and cold winters
- Annual energy savings estimated at over $150,000 (based on 2002 utility rates)
- Table data shows Pinnacle® annual energy cost: $7,230 vs. over‑cooling/reheat at $157,525
Challenge
Design a system capable of achieving strict humidity and temperature control for artifact preservation despite limited chilled water temperatures, tight mechanical space, and noise‑sensitive exhibit requirements.
Solution
A SEMCO Pinnacle® Primary Ventilation and Energy Recovery System was installed, using a passive dehumidification wheel optimized for moisture removal without active regeneration. Additional components included a total energy recovery wheel, cooling and heating coils, and winter humidification. SEMCO modified the unit’s width to fit available mechanical room space.
Results
- Precise humidity and temperature control for long‑term artifact preservation
- System works in coordination with existing chilled water infrastructure
- Over $150,000 annual energy savings compared to conventional over‑cooling and reheat
- Noise concerns successfully mitigated
- Comfortable indoor conditions with no reported issues
- U‑505 appearance remains stable after years of operation
“SEMCO was able to alter the width of the unit to make it fit into the space.”
Bill Vanderbilt
Facilities Director
Museum of Science & Industry
Products Used
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