Nancy Kinner Donna Miller David Wetherbee Bath, ME June 24, 2018

Transcription

1 Grace Episcopal Church Energy for the Future Nancy Kinner Donna Miller David Wetherbee Bath, ME June 24, 2018

2 Grace: Energy for the Future Series 3 Meetings to Discuss Grace s Future Energy Needs Sunday, May 20 Today, June 24 Sunday, July 15 After 8 and 10:15 AM Services Videotaped and Available on YouTube In case you cannot make a session Information and Discussion Grace Episcopal, Bath ME Energy for the Future 2

3 Goals of Sessions May 20 Review Current Energy/Infrastructure Systems Today: June 24 Review Energy/Infrastructure Options Available July 15 Consider Path Forward Specific to Grace Grace Episcopal, Bath ME Energy for the Future 3

4 NEK s Role Facilitating Parish Discussion Information on Current System Founts of Knowledge are Bob Mansfield, Larry Bartlett, etc. Information on Energy Options Professional Audits: Mid Coast Energy: June 2008 Heliotropic Technologies: April 2017 Deliberating Body = Vestry NEK Energy Expert Environmental Engineering Professor Summer Sustainable Engineering Course Grace Episcopal, Bath ME Energy for the Future 4

5 Goals of Grace s Energy for the Future Effort I am tired of being cold on Sunday mornings! I want Grace to spend less money on energy. I want to understand Grace s current facility. I want Grace to be Good Stewards of God s Earth. I want to be proactive, so we don t end up scrambling when the furnace breaks. I want Grace to be Sustainable. I want Grace to have a smaller carbon footprint. Other Grace Episcopal, Bath ME Energy for the Future 5

6 When Do We Discuss Grace s Goals? July 15 Meeting: Consider What Grace Wants/Needs Goals/objectives Time frame Integration into everything we do? Education Consider goals/objectives that Grace will use to select path forward Use goals/objectives to guide decisions regarding path forward Decision Matrix Grace Episcopal, Bath ME Energy for the Future 6

7 Today: Energy/Infrastructure Options Available Heating Hot Water Electricity Lighting Lower Energy Losses e.g., Better Insulation, Better Windows Lower Electricity Demand e.g., Energy Saving Devices Grace Episcopal, Bath ME Energy for the Future 7

8 Today: Energy/Infrastructure Options Available (Today Not Specific to Grace)

9 Heating Grace Episcopal, Bath ME Energy for the Future 9

10 Current Heating System Burnham oil fired boiler Welded steel Forced hot water 7 separate zones Upgrades Insulation on piping networks where possible Programmable thermostats Outdoor reset control Boiler turned off in milder months (June mid September) Grace Episcopal, Bath ME Energy for the Future 10

11 Auxiliary Heating Systems Upper Tubbs Hall Propane fired in fireplace Lower Tubbs Hall Electric in fireplace Grace Episcopal, Bath ME Energy for the Future 11

12 Heating System Options Central system with distribution network Current system = Oil fired boiler with forced hot water distributed to individual rooms with wall heaters Individual room systems = Space Heating Typically, heat air in specific room with devices e.g., Current propane fireplace heater in Upper Tubbs Hall Key is must heat water or air Grace Episcopal, Bath ME Energy for the Future 12

13 Heating System Options Central system with distribution network Heat water (hydronic) or air and force it out into areas where needed Distribution network Hot water through small diameter metal pipes (e.g., copper ½ to 2 inch) Hot air through fairly large ducts Grace Episcopal, Bath ME Energy for the Future 13

14 Central Heating vs. Space Heating Most use a central system with distribution Central heating plant can be more efficient overall Exceptions if low/sporadic usage, may become less efficient to have large system always working Space heating may be better in these cases Programmable thermostats to optimize times for heating Ceiling fans to optimize air circulation in large rooms Grace Episcopal, Bath ME Energy for the Future 14

15 Heating Options Fossil fuels Biomass (wood/wood pellets) Electricity Solar Heat pumps Geothermal Ambient air Grace Episcopal, Bath ME Energy for the Future 15

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17 Heating Units Units for heat British Thermal Units = Btu One BTU raises the temperature of one lb of water by one degree F One lb of water = Approx 2 cups Grace Episcopal, Bath ME Energy for the Future 17

18 Btus 1 gallon of heating oil = 138,500 Btu 1 cubic foot of natural gas = 1,037 Btu One gallon of natural gas = 82.6 cubic feet = 85,656 Btu 1 gallon of propane = 91,333 Btu 1 kilowatt hour of electricity = 3,412 Btu 1 Therm = 100,000 Btu

19 Fossil Fuels Grace Episcopal, Bath ME Energy for the Future 19

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21 Heating Water or Air Burn fossil fuel (oil, gas) Oil = No. 2 fuel oil similar to diesel fuel Types of gas: Propane and Natural gas NG is moved in pipelines through streets Primarily = methane Propane is can be pressured into a liquid Provided in pressured tanks Grace Episcopal, Bath ME Energy for the Future 21

22 Oil Fired Heating System Grace Episcopal, Bath ME Energy for the Future 22

23 Heat Distribution Baseboard heating Grace has this 23

24 Radiant Heating In Walls or Floors 24

25 Biomass Heat = Wood Instead of burning fossil fuels, burn renewable biomass Wood options Logs Pellets Grace Episcopal, Bath ME Energy for the Future 25

26 Solar Heating 26

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33 Passive Solar 33

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35 Heat Pumps Grace Episcopal, Bath ME Energy for the Future 35

36 Types of Heat Pumps Geothermal = Ground source Use heat from earth Need deep well Ambient air = Air source Take heat from air Most common Grace Episcopal, Bath ME Energy for the Future 36

37 How Heat Pumps Work Grace Episcopal, Bath ME Energy for the Future 37

38 Geothermal = Heat from Ground 38

39 Air Source Heat Pumps Grace Episcopal, Bath ME Energy for the Future 39

40 ASHP in Cold Climates As air temperature decreases, get less Btus from air with compression Need backup heating system in Maine Grace Episcopal, Bath ME Energy for the Future 40

41 Cooling Summer temperatures can cause issues in certain areas of building Offices very hot, especially in afternoons when sun on that section of building Cooling systems can be space specific Room air units Some can be tied to heating system options Heat pumps Grace Episcopal, Bath ME Energy for the Future 41

42 Hot Water for Grace Washing hands and dishes etc Fossil fuel, wood, geothermal, and solar heating systems all heat water Same methods used to heat hot water for dishes etc Grace Episcopal, Bath ME Energy for the Future 42

43 Current Hot Water During heating season when oil fired boiler is on Boiler supplies hot water June to mid September use individual units Small electric hot water heater in Sexton s room for kitchen/rest rooms Sacristy Area: Small electric hot water heater year round Grace Episcopal, Bath ME Energy for the Future 43

44 Electricity Options 44

45 Electricity Options Buy green energy from provider CMP Make our own electricity Not always being made when needed e.g., At night with solar Use batteries to store Sell into and buy back from grid 45

46 Solar for Electricity Generation 46

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49 Electricity from Wind 49

50 How to Generate Electricity 50

51 Generator Schematic 51

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58 Lighting Grace is well on its way here! Thanks to Larry Bartlett Fluorescent lighting Mostly T8 and CFLs Newest outdoor lighting and kitchen is LED Exterior lighting will be LEDs CMP will be converting these Grace Episcopal, Bath ME Energy for the Future 58

59 Building Envelope Insulation standards were much lower in 1960s when church built Blown in insulation in attic about 8 inch thick (~R25) with some batt insulation on attic walls Insulation in Sanctuary, Tubbs walls when wall board installed Minimal on Sanctuary roof Grace Episcopal, Bath ME Energy for the Future 59

60 Building Envelope Weatherization: Weather stripping to doors and windows Replace doors Add more insulation to building Exterior casement windows are older style double paned Newer are much more efficient replacement possible Interior storm window retrofits Blower door test to find weak points = leaks in building envelope Infrared analysis to identify major hot spots and heat loss Windows = heat loss Incandescent lights = heat generators Grace Episcopal, Bath ME Energy for the Future 60

61 Other Energy Use Refrigeration Stove Dishwasher Office Equipment (computers, copier) Upgraded with more energy efficient units as replaced over time Grace Episcopal, Bath ME Energy for the Future 61

62 Education Ripple Effect = Grace upgrades = Parishioners upgrade = Neighbors upgrade = Community upgrades =? =? =? Adult education Youth education Grace Episcopal, Bath ME Energy for the Future 62

63 Next Session Sunday, July 15 at 9:00 and 11:15 AM What should Grace do? Goals/Objectives for energy upgrades Options evaluation based on those criteria Plan for Vestry to consider Phases Grace moving forward!!!!!! Grace Episcopal, Bath ME Energy for the Future 63

64 Your Assignment What you think are the objectives? I am tired of being cold on Sunday mornings! I want Grace to spend less money on energy. I want to understand Grace s current facility. I want Grace to be Good Stewards of God s Earth. I want to be proactive, so we don t end up scrambling when the furnace breaks. I want Grace to be Sustainable. I want Grace to have a smaller carbon footprint. Rank choice voting Submit your list by July 10 How? Box outside Church Office to me nancy.kinner@unh.edu RE: Grace Energy Grace Episcopal, Bath ME Energy for the Future 64

65 Questions/Discussion Contact Info: Nancy Kinner: Grace Episcopal, Bath ME Energy for the Future 65