Bridgewater Energy Partnership Workshop 2 November 22, 2016
The Energy Partnership A learning and action program for local businesses and organizations that encourages innovate energy solutions and increases the collective knowledge of energy sustainability. The Partners gather in hands-on workshops every 2 months, and are the stewards of the Living Energy Laboratory. Workshop Schedule Workshop 1 Tuesday September 27, 2016 @ 8AM - orientation Workshop 2 Tuesday November 22, 2016 @ 8AM – solar energy Workshop 3 Tuesday January 24, 2017 @ 8AM Workshop 4 Tuesday March 28, 2017 @ 8AM Workshop 5 Tuesday May 23, 2017 @ 8AM Workshop 6 Tuesday July 25, 2017 @ 8AM Workshop 7 Tuesday September 26, 2017 @ 8AM Workshop 8 Tuesday November 28, 2017 @ 8AM Bridgewater Energy Partnership Workshop 2 – November 22 2016
Workshop Format Top conversation topics selected by members’ survey: Energy financing & funding opportunities Energy markets & business development opportunities Efficiency: heating & cooling (furnaces, heat pumps, etc.) Renewables: solar Renewables: energy storage Energy poverty & social challenges Bridgewater Energy Partnership Workshop 2 – November 22 2016
Workshop Format Welcome & Introductions Workshop Topic of Focus (1 hr) • Solar Energy for Bridgewater by Dr. Wayne Groszko • Worksheet to record learning & ideas • Q&A, and discussion on local examples & opportunities Networking break (20 mins) Current Energy Discussions (40 mins) • The Living Energy Laboratory – project submissions to date • Growing the Partnership – outreach & invitations • Energy Opportunities & Barriers Survey for Members Wrap-up and Next Steps Bridgewater Energy Partnership Workshop 2 – November 22 2016
THREE WAYS TO USE SOLAR ENERGY AT YOUR BUILDING Presentation in Bridgewater, Nova Scotia Wayne Groszko, Ph.D. November 22, 2016
Pilikan House, NSCC Middleton, Nova Scotia, with C. Hayward in foreground. Photo: Wayne Groszko
C. Hayward visiting Pilikan House, Middleton, Nova Scotia – three ways to use solar energy. Photo: Wayne Groszko Pilikan House, NSCC Middleton, Nova Scotia, with C. Hayward in foreground. Photo: Wayne Groszko
C. Hayward visiting Pilikan House, Middleton, Nova Scotia – three ways to use solar energy. Photo: Wayne Groszko Pilikan House, NSCC Middleton, Nova Scotia, with C. Hayward in foreground. Photo: Wayne Groszko
C. Hayward visiting Pilikan House, Middleton, Nova Scotia – three ways to use solar energy. Photo: Wayne Groszko Pilikan House, NSCC Middleton, Nova Scotia, with C. Hayward in foreground. Photo: Wayne Groszko
THREE WAYS TO USE SOLAR ENERGY - HEAT THE INTERIOR SPACE - HEAT WATER FOR DOMESTIC AND COMMERCIAL USE - MAKE ELECTRICITY
HEAT THE INTERIOR SPACE Passive Solar Design
HEAT THE INTERIOR SPACE HOW-TO GUIDE Passive House - Fredericton Heating bill: $77 per year - Thick insulation - Triple-glazed windows - Highly air-tight - Heat recovery ventilation - Simple shape - South-facing windows Naugler House – the most energy efficient house in New Brunswick. Photo courtesy of Thoughtful Dwellings
HEAT THE INTERIOR SPACE Passive House Retrofit for Existing Buildings PROJECT To renovate a 100- year-old farmhouse to meet the Passive House retrofit (EnerPHit) standard. …..(And make a documentary film about it.) Farmhouse to be retrofit in Gagetown, New Brunswick.. Photo courtesy of Garth Hood
HEAT THE INTERIOR SPACE Solar Air Heater - Contributes heat to the air whenever it is sunny and heat is needed. - Warm air is moved by a fan, from inside the house, through the heater, and back to the house. - Can be installed on the south-facing wall of existing buildings.
HEAT WATER FOR DOMESTIC AND COMMERCIAL USE Solar water heater at Heritage House laundry service, Shelburne, Nova Scotia. Photo: Wayne Groszko
HEAT WATER FOR DOMESTIC AND COMMERCIAL USE HOW IT WORKS - Heat transfer fluid is pumped to the collectors. - Solar radiation heats the fluid. - The heat is transferred to a storage tank of water through a heat exchanger. Solar water heater on a house in Halifax, Nova Scotia. Photo: Wayne Groszko
MAKE ELECTRICITY – PHOTOVOLTAIC (PV) SYSTEMS Solar photovoltaic array at a family home in Wolfville, Nova Scotia. Photo: Wayne Groszko
MAKE ELECTRICITY – PHOTOVOLTAIC (PV) SYSTEMS HOW IT WORKS - Solar radiation is converted to electrical current. - The current is processed by an inverter. - Electrical current flows to your building. - Surplus flows to the grid for a credit. Solar photovoltaic array, Nova Scotia Community College, Dartmouth, Nova Scotia. Photo: Wayne Groszko
THREE KEY CONCEPTS FOR USING SOLAR ENERGY (1) You need particular conditions at your building to be able to make use of solar energy. (2) An up-front investment, or some form of financing, is required. (3) You can earn significant returns over time, both in dollars and greenhouse gas emission reductions. Solar photovoltaic array on a fire station, Halifax, Nova Scotia. Photo: Wayne Groszko
IDEAL SOLAR ENERGY CONDITIONS (1) Sun exposure (for Nova Scotia): - A south-facing surface receives the greatest amount of solar energy on an annual basis. (Although anywhere from west- facing to east-facing will produce fairly well.) - For year-round production, a tilt angle of 30 to 45 degrees up from the horizontal works well. - For winter-only needs (such as home heating), vertical or very steep tilt angles work best. (2) Minimal shading from buildings, trees, and other objects. (3) A load to use the energy: - Your building and the grid (use some, sell the surplus) - Used immediately (e.g. solar-heated air), or - Stored for later use (e.g. storage tanks of hot water).
THREE KEY CONCEPTS FOR USING SOLAR ENERGY (1) You need particular conditions at your building to be able to make use of solar energy. (2) An up-front investment, or some form of financing, is required. Example: The Passive House in Fredericton was financed with a mortgage loan. The energy efficient design was revenue-positive right from the first month. (energy savings – extra mortgage payment = net savings) (3) You can earn significant returns over time, both in dollars and greenhouse gas emission reductions.
THREE KEY CONCEPTS FOR USING SOLAR ENERGY (1) You need particular conditions at your building to be able to make use of solar energy. (2) An up-front investment, or some form of financing, is required. (3) You can earn significant returns over time, both in dollars and greenhouse gas emission (GHG) reductions. Example: Investing about $14,000 in a solar PV array with 5 kilowatts of capacity will return about $850 per year, which is about a 6% annual rate of return. It will also save over 3 tonnes of GHG emissions per year, and operate for 25 years. (Prices are for 2016.)
THREE QUESTIONS PEOPLE ASK (1) How much will this cost? (2) What’s the payback period? (3) How do I get solar energy for my building? (Who do I ask?)
THREE QUESTIONS PEOPLE ASK (1) How much does it cost? - It depends on the project. (2) What’s the payback period? - It depends on the project, the type of solar energy, price assumptions, and how you calculate the payback period. Return on investment can be a better metric. (3) How do I get solar energy for my building? (Who do I ask?) - Solar Nova Scotia list of suppliers (www.solarns.ca) It’s often best to start with an energy assessment. - Welcome to contact me – contact at the end of presentation -
A NEW OPPORTUNITY – Community Solar Program The Nova Scotia government is launching its Community Solar Program in 2017, giving non-profit groups, municipalities and Mi’kmaq bands an opportunity to install solar electricity (photovoltaic) systems on their community buildings and sell the electricity. Community solar celebration, Ship Harbour Nova Scotia. Photo: Deanery Project If you know a community organization that may be interested, contact Wayne Groszko for more information.
KEY TERMS - Insolation: The quantity of solar energy that reaches a particular place over a period of time. - Solar gain: Increase in thermal energy (heat) in a building due to solar radiation entering the building through transparent surfaces like windows. - Solar water heater: Device that uses solar radiation to heat water for domestic, commercial or industrial use. - Solar air heater: Device that uses solar radiation to provide hot air to heat the space in a building. - Passive solar design: A set of design principles and practices for creating a building that makes use of solar gain to heat itself in winter in a cold climate location. - Passive House Standard: The most stringent energy efficiency standard for buildings, that results in very low energy consumption for heating. - EnerPHit Standard: The Passive House standard for retrofitting buildings.
KEY TERMS - Photovoltaic (PV) system: A system that converts solar radiation into usable electric current, using semi-conductor materials. - Flat plate collector: A type of solar water heater made of a flat collection surface, typically inside an insulated box with transparent glazing to allow solar radiation to enter. - Evacuated tube collector: A type of solar water heater in which the collection surfaces are enclosed in glass cylinders that are insulated with a vacuum.
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