Geothermal Case Studies and Considerations

Transcription

1 Geothermal Case Studies and Considerations Geothermal Air Conditioning: Eliminate your cooling tower! By Jay Egg Pumps and Exchangers Pinellas County Safety Complex: 1300 tons Geothermal Open Loop Application Engineering Matrix, Florida Consulting Engineers

2 22 YEARS IN THE INDUSTRY Now Writing with Greg Cunniff: Modern Geothermal HVAC Engineering and Controls Applications for McGraw-Hill Worldwide

3 EggGeothermal is a trusted authority on Renewable Energy Implementation

4 Sussex County, Delaware: Failed Geothermal System News Flash

5 Sussex engineers performed a study and found: What is a Backup Geothermal System? You guessed it: Open Loop Geothermal

6 Temporary cooling from a cooling tower While we engineered the open loop supplemental geothermal

7 Another System is Saved!

8 The team that put it together Local Engineers and EggGeothermal Sussex County EOC is Saved

9 Meanwhile: Newcastle County has a shutdown of its Geothermal HVAC

10 YWCA, Canton, Ohio Slated to go closed loop Changed to open loop Reduced first costs by $600,000 Reduced energy costs by 37% Yoder Geothermal and Finney Refrigeration in Ohio :

11 Inside the pump and injection geothermal system at the YWCA Backup deep well pump and motor Two 100 ton plate and frame exchangers Looks like this when not insulated Looks like this when installed

12 Hydrotherm KN-6 Boilers These babies will be idle for a long time Let s talk about South Florida Condos Circulation pumps and expansion tank

13 You can utilize a series of water to water heat pumps 600 ton High School- Geothermal HVAC

14 Or you can utilize a chiller

15 Or you can run the condenser water loop to your individual Geothermal Heat pumps Simply drill a supply well and an injection well; Install exchangers to isolate the system; Then install as many heat pumps as you like! Make your system expandable the sky is the limit!

16 Thermal Retention is Real Think outside the Loop Return temperatures: 105F+...and it s trouble

17 International Ground Source Heat Pump Association Training: Focused on Closed Loop Technology

18 Geothermal Training Standards Revitalization of GHP Trainers are missing regional concerns Hazards Misinformation DOE/GeoExchange

19 Pump and Injection Geothermal HP Watch your exchanger material! and your water quality! But you still need (next slide)

20 An Intermediate Exchanger solves problems associated with open loops essentially puts the equipment on a closed loop provides for easy service Proper Engineering is a must! trust experience!

21 Engineer it Right the First Time Use top quality equipment and supplies Geofinity ORB Controller

22 Nearly All Water Jurisdictions Have Verbiage

23 Exchanger Fouling and Scrubbing Occurs when air gets in the system; Lacking proper design Proper open loop design is critical to proper performance

24 Old School Observations This 31 year old Friedrich geothermal heat pump is operating well after 31 years. because system design is correct.

25 Do your Homework; How do you know where your water is located? Lithology, testing, knowledge

26 Current Proper Implementation Supply and injection system proper specialties

27 Responsible Pumping is Important Many businesses and home-owners currently have wells encourage injection wells They re required by law

28 Heat Exchange Wells Most jurisdictions in the US and many in the world have statutes allowing heat exchange wells. Properly constructed to local codes, these systems work flawlessly Supply Well Injection Well

29 Pumping Energy? Take a Look: Understanding the AHRI ratings For cooling towers; No Pumping energy costs Includes pumping energy costs

30 Ground Water vs. Ground Loop Notice the rated fluid temps: 4 point difference in AHRI - Mostly due to cooler/warmer constant temps

31 Make the Injection Well Air-tight The draw down effect: Reduces noise Reduces Fouling Reduces power used

32 Ignorance to Regional Data Hot and Humid climates (Cooling Dominant) Commercial buildings (high internal heat gains) Try to resist putting in more outside equipment such as cooling towers 5 years old:

33 WHY WATER BASED COOLING? Due to the problems with Cooling Towers, many clients have gone to air-cooled equipment. Too bad since an air-cooled system has an innate efficiency of around 1.2 KW/ton whereas a water-cooled system has an innate efficiency of around.85 KW/ton.

34 300-ton system running 50% of the year says: Air-cooled = $164,400 / year energy cost Water-cooled = $116,500 / year energy cost CALL IT: $50,000 / year savings

35 Then, Why Air cooled? This low maintenance model has been engrained in many of the districts that they default to air-cooled. Understandable when it adds a maintenance headache.but this will go away (mostly) with the Geothermal option.

36 Are smaller heat pumps less important than Chillers? Where are the hydronic specialties? About $900 more provides the following specialties: Expansion Tank Coalescing separator Makeup water Relief Valve

37 We Love Closed Loop! Under the right conditions commercial is not one of those. Egg Geothermal in Georgia

38 Variables of Geothermal HVAC Soil thermal conductivity Aquifer depth and availability Regulations Water quality Exchanger type and quality Piping Valves and controls Controls

39 Why Open Loop? Cooling and Heating Dominant Loads Increased Energy Efficiency Little Surface Area Needed Less Intrusive

40 Standing Column? Stay tuned for more on this.

41 The Choice is yours: Outside? Or Inside! The time for Geothermal has come!

42 Taco Load Match and LOFlo decoupled secondary technology*, construction and maintenance costs are reduced Single Pipe Systems; TACO Engineering

43 Squeezing Cooling Out of Every kwh by Using the Best Controls and keeping you in charge!

44 Scalable to Fit Any Size Project Individual Heat Pumps Chillers

45 Geothermal HVAC, Green Heating and Cooling; McGraw-Hill #1The top rated HVAC book on Amazon Modern Geothermal HVAC Engineering and Controls Applications; Winter 2012 Available from the NGWA! Available from ASHRAE!

46 Egg Geothermal is partnering with companies worldwide to implement low temp applications

47 Thank You! Geothermal Air Conditioning: Eliminate your cooling tower! By Jay Egg

48 We believe that less than 10% of all geothermal system failures are reported We believe that thermal retention is a serious problem in cooling dominant situations We believe the industry needs to be retrained Now is the time, because

49 A small well (4 casing) will take care of as much as 25 tons or more; perfect for a single building application

50 Variable Frequency Drive for Pumps It really makes a difference! 1.59 amps amps

51 Intelligent VFD controllers, and iworx control logic; integration of 6 DHW tanks, 13 HVAC systems, and 4 pool heat pumps in complete harmony.