HVAC Efficiency In Healthcare. Presenter Mr. Nate Lincoln

Transcription

1 HVAC Efficiency In Healthcare Presenter Mr. Nate Lincoln

2 Learning Objectives Control Systems Annuals; Chillers, Cooling Towers, Air Handler Units Infection Control Sustainability Goals and Reporting

3 Four Key Benefits of a more efficient Hospital Energy Reduction Reduction in HVAC operational and maintenance costs Performance Improvements Extend life of HVAC equipment

4 Energy Efficient Chillers

5 Energy Efficient Chillers

6 Energy Efficient Chillers

7 Chiller Annuals Make sure Purge is working Leak Check; Change the Oil; Analysis of the Oil Brush Tubes.(Every Tube) Pull Strainers Check water side pressure differentials thru the year Edy Current Testing Know what % in which your chillers are running Re-Gasket every 10 years (Manufacturer Recommended) Motor Rebuild..clean up kit option Make Rounds Know the Delta T at your chiller Plant

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9 Cooling Tower Annuals Must be Cleaned Annually..Basin TOO! Water Treatment Belts; Changed Annually, 2 years, 5 years New Towers? Stainless Steel Basin Option Vibration Analysis Grease Bearings New Oil for Gear Boxes Check Motor Windings

10 Air Handler Units Annuals Must be Cleaned Annually..Basin TOO! Water Treatment Belts; Changed Annually, 2 years, 5 years New Towers? Stainless Steel Basin Option Vibration Anaylsis Grease Bearings New Oil for Gear Boxes Check Motor Windings

11 Chill water and Heating water Coils

12 Hospital Air Handling Unit

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14 Back to Back Coils

15 Direct effects of having dirty coils Dirty Coils Could lead to replacement of HVAC AHU Could lead to inefficient operation of the chiller Guaranteed to increase your energy use Provides very poor indoor air quality (IAQ) Loss of compressors and fan motors Dirty Sock syndrome Excess wear and tear on chillers Microbial and bacterial growth (Humidity)

16 Using chemicals to clean HVAC equipment and coils Dangerous and corrosive chemicals Chemicals only make coils appear to be clean and will damage coils over time Chemical methods clean about 2 to 3 inches of coils but most coils in hospitals are about eight to fourteen inches thick Does nothing to extend the life of the coil or other components of the AHU Does not penetrate the entire coil Toxic fumes can be introduced into the indoor air environment

17 Chemical Coil Cleaner

18 Key Takeaway #1: Revisit Your Chemical Program Chemicals have fumes Excessive chemicals hinder the effective operation of the HVAC system Steam cleaning your equipment will rid hospitals of the harmful agents that pollute our indoor air by reducing the number of dangerous bacteria emitted from most HVAC systems. Chemicals are corrosive No water run off concerns Who is using chemicals to clean your AHU s and Coils?

19 The Process Medium pressure, high temperature steam Complete coil penetration Cleaning should include blower section, blower wheels, condensate drain pan, interior cabinets Water extraction methods Immediate impact on equipment cleaned Protection of electrical components and devices

20 Chilled Water System

21 Key Takeaway #2: Evaluate your Equipment What is the temperature difference of your chiller plant? What are the differential pressures at each AHU? What is the water side delta T of your AHU s? How many of your AHU s are meeting static pressure set points? How many of your VFD s are running in bypass or at 100% Do you need colder and dryer Operating Rooms? Do you have AHU s, VFD s, Valves out of control?

22 Energy Savings Run your equipment at the speed limit Reduce Operating Costs Energy Reduction- better airflow thru the equipment, and allows equipment to run at peak performance VFD s back off Penetrates the entire coil- no matter the size or location Drops relative humidity - Increases delta T (heat transfer) by 20% Chill water valves back off

23 Reduction in Operational and Maintenance Costs Cost to replace a chill water coil on 80 ton AHU $35, Chillers can fully load up Less wear and tear on fan motors Less wear and tear on compressors Compressors are allowed to run at normal operating head pressures Increased capacity

24 VFD s and VSD 100%

25 Indoor Air Quality Improvements Sick, moldy, mildew, earth like smell sometimes known as "Dirty Sock Syndrome Kills microbial and bacterial growth, immediately Sterile environment created with high temperature steam process Increased air exchanges Infection control improvements ASHRAE 170 A1. O&M in Healthcare Facilities

26 Extend life of HVAC equipment Differential pressure improvements Improvements in heat transfer and airflow Compressor and condenser fan motor life is extended Restores coils to like new condition Performance Improvements in Delta T Lessons wear and tear on bearings

27 How Sustainability Goals are Achieved Energy Efficiency Analysis Reports Operational HVAC expenses lowered (track spending) Projected ROI for HVAC equipment cleaned Sustainable with servicing every year (usage dependent) Capital Spending Lowered

28 Reporting How do you know if your coils are cleaned? Differential pressure tests Static pressure before and after Supply and return temperatures before and after Water side delta T before and after VFD readings before and after Many controls systems have this data Check for yourself

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32 Sustainable Steam Cleaning Technique A clean system runs more efficiently A clean system means a cleaner workplace, less dust being circulated throughout the office Provides a healthier working environment Reduces absenteeism and complaints Positive perception of building Increases productivity Costs less to operate and maintain Extends the useful life of equipment

33 Questions? Nate Lincoln