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Humidification in Hospitals Nebraska Society of Healthcare Engineers.

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Presentation on theme: "Humidification in Hospitals Nebraska Society of Healthcare Engineers."— Presentation transcript:

1 Humidification in Hospitals Nebraska Society of Healthcare Engineers

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

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

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 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% % % % % % * 24.0 Space % RH Cooling tons lvg coil °F Reheat “tons” CHW °F 45 °F 39 °F 45 °F 39 °F 45 °F 34 °F 45 °F * High Temperature Preheat Based on 15,000 cfm System Comparison Nebraska Society of Healthcare Engineers

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

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

11 Application Examples Nebraska Society of Healthcare Engineers 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

12 Hospital Humidification Luke VanCamp Nebraska Society of Healthcare Engineers

13 Methods of Humidification Direct Steam Injection Evaporative Pan Water Spray

14 Nebraska Society of Healthcare Engineers Direct Steam Injection

15 Nebraska Society of Healthcare Engineers Humidification Grid

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

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

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

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

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

21 Nebraska Society of Healthcare Engineers Electrode Type Humidifier

22 Nebraska Society of Healthcare Engineers Water Dependencies Conductivity ( (umho) Hardness ( PPM) Hardness ( Grains/Gallon)

23 Nebraska Society of Healthcare Engineers Water Impurities

24 Nebraska Society of Healthcare Engineers Resistive Heating Element Type

25 Nebraska Society of Healthcare Engineers Adiabatic Humidifiers

26 %RH Grains of Moisture/ lb. Dry Air Wet Bulb F Dry Bulb F FOGGER SAVINGS STEAM MIXING POINTFOGGER MIXING POINT 1) O.A. MIXING 2) FOGGING RA SA OA FOGGER SAVINGS STEAM MIXING POINTFOGGER MIXING POINT OA Spring/Fall Economizer 1.O.A. Mixing 2.Fogging 3.Building Heat Gain

27 Nebraska Society of Healthcare Engineers Nozzle

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


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