Skidmore College Geo-thermal District Story

Transcription

1 Skidmore College Geo-thermal District Story

2 Brief background Quick Stats 2,450 students 60% women 40% men 22% students of color 9% international students 259 full-time faculty 16 average class size 42 academic majors 100 student clubs 19 athletic teams

3 Creative Thought Matters. Founded more than a century ago and located in Saratoga Springs, New York, on a beautiful 890-acre campus, Skidmore is a highly regarded liberal arts college known for its creative approaches to just about everything. The college's core belief: Creative Thought Matters. CTM

4 Skidmore s Geothermal History first stand alone design for a 10 building student housing project- 380 beds- 166,000 sq.ft first existing building stand alone design converting the student dining hall -50,450 sq.ft.- 18hrs/day Zankel Music Center- 55,500 sq.ft. 50% RH first district design-termed Arts quad node- 4 buildings- 178,300 sq.ft next student housing project- 3 buildings -102 beds-49,800 sq.ft.- designed with no boiler back-up.

5 Skidmore s Geothermal History-more additional student housing projects- 2- buildings 114 bed 42,720 sq.ft. 7-buildings- 238 beds- 106,400 sq.ft Second district design- Tang Node- 3 buildings- 109,500 sq.ft., designed for Third district design- Science Center Node- 4 buildings-310,300 sq.ft.

6 As of 2014

7 Skidmore s Underground Arsenal The bedrock of Skidmore s Geothermal success is based in part due to the Dolostone that is prevalent across the entire campus. For a given heat input rate, a larger soil(rock) thermal conductivity reduces the required depth of a vertical borehole, which decreases installation costs. Richard A. Beier, Mechanical Engineering Technology Department Oklahoma State University CTM

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9 Skidmore has Good Rocks

10 TC test for Skidmore Preformed December 8 th, 2004 Formation Thermal Conductivity = 2.30 Btu/hr-ft- F basis for exchanger design since

11 Loads of Nodes Mode OR Distributed District Approach CTM

12 BRIEF INTERMISSION As I attempt to go to the Skidmore interactive campus map (if the wireless works)

13 Arts Quad

14 Distributed District Approach Arts Quad Node

15 Distributed District Approach Tang Energy Node 2 bore field 64

16 Tang Museum

17 get ground photo of tang node

18 equipment Cooling Replaced failing air cooled chiller with 4 stage WS chiller Heating Installed a 4 stage templifier in lieu of gas boilers

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20 Weicking Hall---energy node 2 individual HP s per bedroom-146 *First incorporation of VRV using Water Source condenser for the commercial office space

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22 2010 Dance Center HP conversion roof top units to WSHP

23 Node 2 future infrastructure during the 2014 bore field installation -added future circuit piping from the bore field to accommodate the Sport Center Building and Child Care center Added supply and return piping to those buildings for future conversions

24 Science Node 3 Distributed District Approach 240 bore field with laterals Completed September 2016

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27 add outline of new tiered parking lot

28 Science Node 3 When fully engaged this 240 bore field will handle the diverse load for : Existing Science Complex- 101,500 sq.ft. Existing Palamountain Hall- 58,500 sq.ft. Existing Bolton Hall - 17,500 sq.ft. Existing Tisch Learning Center- 34,300 sq.ft. New Science Addition - 98, 700 sq.ft. 310,500

29 On the near Horizon When fully engaged- 58% of total sq.ft. at Skidmore College will be heated and cooled via Geothermal

30 Energy Node Design Energy Modeling Basics Energy Node Design Arts Quad Node Tang Node 2 Science Node 3 Pumping Design and Control Loop Field Balance

31 Energy Node? ( CTM) Geothermal Sharing Btus Space to Space Building to Building

32 Skidmore CTM Sharing BTU s in Skidmore speak is: Thermal Chat between buildings with diverse loads CTM

33 Energy Model Basics Demand (kw or Btu/h) Vs. Energy (kwh or Btu) "Understanding Demand and Consumption." Understanding Demand and Consumption. N.p., n.d. Web. 16 Mar

34 Energy Modeling Programs Many equest EnergyPlus EnergyPro EnerSim IES Virtual Environment DOE-2 more Carrier s HAP Trane TRACE 700 TRNSYS DesignBuilder VisualDOE TREAT

35 Load (kbtu/hr) Load (kbtu/hr) Load (kbtu/hr) Building Profiles Zankel Load Profile Cooling LoadSasselin Heating Load Profile Load (kbtu/hr) Cooling Load Time (Hr) JKB Heating Load Profile Cooling LoadFilene Heating Load Profile Time (Hr) Cooling Load Time (Hr) Time (Hr) Heating Load

36 Arts Quad Load Profile Cooling Load Heating Load Load (kbtu/hr) Time (Hr)

37 Loop Field Size Savings -Art Node # of Loops Depth Total Length Zankel ,500 Sasselin ,000 JKB ,000 Filene ,500 Total 136 Combined Loads , % SAVINGS

38 Building Profiles Load (kbtu/hr) Load (kbtu/hr) Load (kbtu/hr) Dance Center Load Profile Weicking Heating Cooling Hall Load Profile Tang HeatingMuseum Cooling Load Profile 2000 Greenberg Heating Child Cooling Care Center Load Profile Heating Cooling Heating Cooling Time (Hr) Time (Hr) Load (kbtu/hr) Load (kbtu/hr) Williamson Sports Center Load Profile 0 Time (Hr) Time (Hr) Time (Hr)

39 Tang Node-Loop Field Size Savings # of Loops Depth Total Length Zankel Dance Center ,500 9,000 Sasselin Weicking Hall ,000 15,000 JKB Tang Museum ,000 23,000 Filene Greenberg Child ,500 2,500 Williamson Sports Total ,000 Total 159 Combined Loads , % SAVINGS

40 Energy Node Concept- Building flow

41 Building Flow Arts Quad Buildings Flow Zankel JKB Sasselin Filene Hours Flow Rate (GPM)

42 Filene Flow example Arts Quad Building Flow (GPM) Filene Hours Flow Rate (GPM) 84% <60 GPM

43 Filene Analysis

44 Filene Analysis BBBBBB 1 = =2.67 BBBBBB 2 = =1.33 BBBBBB 3 = =0.77

45 THE BALANCE Reverse/ Return header design»helps relive the pressure drop CTM

46 Loop Field Balance Desired Flow per Loop gpm Bore Depth Feet Pipe Diameter 3/4" 1" 1 1/4" 1 1/2" 2" Design Loop DP (from LHD) Feet Design RR Header DP 0 Actual Flow Rate Due to Natural Balance (Without Balance Valves) Number of Groups Groups Total Loops 102 Group Loops Des Flow Rate Total Length 4"Supply Length 6"Supply Length RR Header DP Actual Flow % of imbalance % % % % % % % % % % % %

47 Loop Field Balance

48 Loop Field flow

49 Loop Field flow Arts Quad Energy Node Arts Quad Building Summation Hours Flow Rate (GPM) 85% <50% Flow

50 Pump Power Scale for System Curve (FOH) Pump Power & System Curve Scale for KW & # of Pumps System Curve # of Pumps Power gpm

51 Energy Node Control Full Flow Full Flow 0.8 Vast Majority of Run Minimum Flow -0.2 Return Building Loop Fluid Temperature

52 Conventional VFD-End Suction Pump

53 Pump Manifold

54 the Arts Energy Node

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57 So why does this matter in the grander scheme of things? Is there a relationship? Does it really count for anything? CTM

58 Findings based on 2 Greenhouse Gas first conducted inventories last conducted next slated for

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60 Findings 2 In year total student population Students In year 2013-total student population

61 Findings 3 In year 2000 total Natural Gas consumption- 164,691 MMBTU MMBTU In year 2013 total Natural Gas consumption- 111,256 MMBTU

62 Findings 4 In year total electrical KWH--- 20,627,059 In year total electrical KWH---25,205, KWH KWH/Sq.ft

63 Increase in Campus Building area-- a 27% increase Increase in Student population a 12% increase Decrease in MMBTU/ Sq. Ft.--- a 32% reduction Decrease in Kwh per Sq. Ft a 4% reduction

64 GREENHOUSE GAS (co2e) 48% reduction from

65 Skidmore College We blame this, in part, on geo-thermal, both new installations and existing building conversions CTM

66 Skidmore s Green Energy Initiatives

67 Skidmore College- 2.1 MW Solar Array % electrical load ~ `~6950 solar panels

68 Capacity to provide 18% of electrical load

69 We purchase 10% of our electricity from additional renewable sources 12%--Solar PV 18%--- Micro Hydro 10%---- Other 40 %-- Renewable

70 GHG Future tally Next GHG inventory is scheduled to be completed in We are anticipating that with the additional geothermal district coming on line and the renewables initiative powering those systems, that the new reduction level will approach % Reduction

71 One Final Bafflement RRRR 5 Skidmore Speak Alliteration CTM

72 Postulate 1- geothermal heating and cooling is the most energy efficient means of heating and cooling a building Postulate 2-Distributed District Systems Approach enhances the pre- existing energy efficiency inherent with geothermal Postulate 3- driving enhanced energy efficiency systems with renewable electrons is possibly one of the greenest means of heating and cooling college buildings What can be derived?

73 Uniqueness of RRRR 5 and Skidmore geo-thermal heat pumps systems- the most energy efficient method of heating and cooling District geo-thermal systems even more energy efficient --- (Energy Efficiency X Energy Efficiency ) Geo-thermal systems being operated by Renewable Energy (Solar,Hydro and other) Thus RRRR 55 CTM

74 Distributed District Take Away Do Energy Models Design Geothermal Systems that capture the reduction in capital expense Design Pumping Systems for maximum Energy Conservation hence operational cost savings Capitalize on your deferred interior systems, mechanical replacements and building envelopes to leverage project costs DD Systems are more dynamic for the physical plant Compound your green footprint with renewable energy sources

75 Skidmore College Future NET Zero Heros and Growing

76 Thanks to: Earth Sensitive Solutions- Jared Fortna and John Manning for sharing their slides and their expertise in our district approach NY-GEO- for asking me to participate

77 thanks for listening Paul Lundberg- Assistant Director of Construction Services and Planning