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Humidification in Hospitals

Humidification in Hospitals. Nebraska Society of Healthcare Engineers. Presented By. Eric G. Sherman, P.E., LEED AP, CxA. Jonathon Spreeman, District Sales Engineer. Luke VanCamp, Sales Engineer. Nebraska Society of Healthcare Engineers. Agenda. Humidification of Hospitals

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Humidification in Hospitals

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  1. Humidification in Hospitals Nebraska Society of Healthcare Engineers

  2. Presented By Eric G. Sherman, P.E., LEED AP, CxA Jonathon Spreeman, District Sales Engineer Luke VanCamp, Sales Engineer Nebraska Society of Healthcare Engineers

  3. Agenda Humidification of Hospitals Healthcare Humidification Code Hospital Dehumidification Strategy Comparison Case Studies Hospital Humidification Strategy Comparison Questions….. Nebraska Society of Healthcare Engineers

  4. Healthcare Humidification Code Eric Sherman Nebraska Society of Healthcare Engineers

  5. Healthcare Humidification Code AIA / FGI Guidelines for Healthcare Construction NFPA The Never Ending Debate Nebraska Society of Healthcare Engineers

  6. Hospital Dehumidification Jonathon Spreeman Nebraska Society of Healthcare Engineers

  7. Dehumidification Strategies Common System Types • Traditional Cooling & Reheat • Split Dehumidification Unit • Dedicated OA Coil • Dedicated RA Coil • Series Desiccant Wheel • Heat Generated Desiccant Nebraska Society of Healthcare Engineers

  8. System Comparison CHW °F Cooling tons lvg coil °F Reheat “tons” Space % RH Basic CV system Cool & reheat (1 coil) Cool & reheat (2 coils) Upstream coil Downstream coil Split dehumidification unit OA coil RA coil Trane CDQ Heat Regenerated Desiccant 70% 26.6 55.3 0 60% 40.0 47.0 12.0 60% 40.0 12.0 20.0 55.0 20.0 47.0 60% 28.0 0 24.0 42.5 4.0 55.3 52% 29.3 50.3 0 52% 44.0 55.3 * 24.0 45 °F 39 °F 45 °F 39 °F 34 °F 45 °F 45 °F 45 °F *High Temperature Preheat Based on 15,000 cfm Nebraska Society of Healthcare Engineers

  9. System Comparison Annual Oper Cost vs Over 20 years AnnualOper Cost Oper $/hr @ design Annual hrs Cool Reheat Cool & reheat (1 coil) Cool & reheat (2 coils) Upstream coil Downstream coil Split dehumidification unit OA coil RA coil Trane CDQ Heat Regenerated Desiccant $5.07 3000 $15,250 $300K $4.53 3000 $13,590 $272K $3.07 3000 $9,210 $184K $2.53 3000 $7,590 $152K $6.00 3000 $18,000 $360K -- -11% -39% -50% +18% $0.058/kwh $0.78/therm Nebraska Society of Healthcare Engineers

  10. 75F 63F DPT 80F 60F DPT OA MA' MA RA WATER VAPOR CA SA 50F 49F DPT 55F 43F DPT TRANE CDQ WHEEL Application of Series Desiccant Wheel A “Series” Desiccant wheel used to improve the dehumidification ability of a cold coil CONDENSATE Nebraska Society of Healthcare Engineers

  11. Application Examples Building Expansion (Existing Central Plant) Good Samaritan Hospital Expansion • 30,000 CFM Dedicated Surgery Unit • Existing 42 Degree Chilled Water • Leaving Unit: 60 Degree DB and 41 Degree DP Building Expansion (Existing Central Plant) Gothenburg Hospital Surgery Area • 6,000 CFM Dedicated Surgery Unit • DX condensing unit • Leaving Unit: 57 Degree DB and 44 Degree DP Nebraska Society of Healthcare Engineers

  12. Hospital Humidification Luke VanCamp Nebraska Society of Healthcare Engineers

  13. Methods of Humidification • Direct Steam Injection • Evaporative Pan • Water Spray Nebraska Society of Healthcare Engineers

  14. Direct Steam Injection Nebraska Society of Healthcare Engineers

  15. Humidification Grid Nebraska Society of Healthcare Engineers

  16. Unfired Steam Generators Series RB Series RB-V Series RB-H Nebraska Society of Healthcare Engineers

  17. Steam-to-Steam Humidifier Nebraska Society of Healthcare Engineers

  18. Humidification Grid with Atmospheric Steam Generator Nebraska Society of Healthcare Engineers

  19. Gas-Fired Humidifier • Will work on natural gas or liquid propane gas • Includes models for both indoor and outdoor service • Provides steam production capacities up to 475 lbs/hr Nebraska Society of Healthcare Engineers

  20. Energy Savings Electricity vs. Gas Electricity @ $0.08 / kW Gas @ $0.53 / Therm Based on 150 Lbs/hr Output Nebraska Society of Healthcare Engineers

  21. Electrode Type Humidifier Nebraska Society of Healthcare Engineers

  22. Water Dependencies • Conductivity (200-400 (umho) • Hardness (133-266 PPM) • Hardness (7.7-15.5 Grains/Gallon) Nebraska Society of Healthcare Engineers

  23. Water Impurities Nebraska Society of Healthcare Engineers

  24. Resistive Heating Element Type Nebraska Society of Healthcare Engineers

  25. Adiabatic Humidifiers Nebraska Society of Healthcare Engineers

  26. 1) O.A. MIXING 2) FOGGING FOGGER MIXING POINT FOGGER MIXING POINT STEAM MIXING POINT STEAM MIXING POINT FOGGER SAVINGS FOGGER SAVINGS %RH Spring/Fall Economizer 100 90 80 70 60 50 40 30 50 SA RA 50 • O.A. Mixing • Fogging • Building Heat Gain 40 40 40 Wet Bulb F 30 30 Grains of Moisture/ lb. Dry Air 30 30 20 20 20 20 10 10 OA OA 0 10 20 30 40 50 60 70 80 90 0 10 20 30 40 50 60 70 80 90 26 Dry Bulb F

  27. Nozzle Nebraska Society of Healthcare Engineers

  28. Thank you for your time! Questions please? Nebraska Society of Healthcare Engineers

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