Urban Habitat Chicago Institute. presents. Homemade Solar. No Panels Required!
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1 Urban Habitat Chicago Institute presents Homemade Solar No Panels Required!
2 What Is Solar Energy? Passive Solar: has few moving parts, and requires minimal maintenance and require no mechanical systems. Active Solar: everything else.
3
4 History of Passive Solar Dwellings Cliff Palace, Mesa Verde Colorado Photo Courtesy of National Park Service
5 Why is it good? Cheaper than active solar system More reliable than other sources Very unlikely to explode in our lifetime (no Fukushima) Our bodies are built for it.
6 Why is it good? Image Courtesy of IE3 Media
7 Basics of Heat & Sun Heat Transfer in 3 Ways
8 Heat Transfers in 3 ways: 1. Convection: why hot air balloon can float
9 Heat Transfers in 3 ways: 1. Convection 2. Conduction: how you burn yourself drinking that coffee
10 Heat Transfers in 3 ways: 1. Convection 2. Conduction 3. Radiation: how the sand on the beach gets so hot...and usually in combinations.
11 In the Context of a House
12 Heating and Cooling a House Degree Days: a measure of heating or cooling. 1 Degree Day: when the average temperature of the day is one degree above or below the base degree
13 Heating and Cooling a House Chicago: Mesa Verde: San Diego: Orlando: 6167 Heating Degree Days 1128 Cooling Degree Days 6964 Heating Degree Days 1104 Cooling Degree Days 1375 Heating Degree Days 688 Cooling Degree Days 771 Heating Degree Days 3413 Cooling Degree Days
14 Sun: The Moving Furnace Far Away Spring Equinox (March 20, 2014) 6 AM
15 Sun: The Moving Furnace Far Away Spring Equinox (March 20, 2014) 9 AM
16 Sun: The Moving Furnace Far Away Spring Equinox (March 20, 2014) 12 Noon
17 Sun: The Moving Furnace Far Away Spring Equinox (March 20, 2014) 3 PM
18 Sun: The Moving Furnace Far Away Spring Equinox (March 20, 2014) 6 PM
19 Sun: The Moving Furnace Far Away Summer Solstice (June 21, 2014) 6 AM
20 Sun: The Moving Furnace Far Away Summer Solstice (June 21, 2014) 9 AM
21 Sun: The Moving Furnace Far Away Summer Solstice (June 21, 2014) 12 Noon
22 Sun: The Moving Furnace Far Away Summer Solstice (June 21, 2014) 3 PM
23 Sun: The Moving Furnace Far Away Summer Solstice (June 21, 2014) 6 PM
24 Sun: The Moving Furnace Far Away Autumn Equinox (September 23, 2014) 6 AM
25 Sun: The Moving Furnace Far Away Autumn Equinox (September 23, 2014) 9 AM
26 Sun: The Moving Furnace Far Away Autumn Equinox (September 23, 2014) 12 Noon
27 Sun: The Moving Furnace Far Away Autumn Equinox (September 23, 2014) 3 PM
28 Sun: The Moving Furnace Far Away Autumn Equinox (September 23, 2014) 6 PM
29 Sun: The Moving Furnace Far Away Winter Solstice (December 21, 2014) 9 AM
30 Sun: The Moving Furnace Far Away Winter Solstice (December 21, 2014) 12 Noon
31 Sun: The Moving Furnace Far Away Winter Solstice (December 21, 2014) 3 PM
32 Sun: The Moving Furnace Far Away Image Courtesy of University of British Columbia
33 Letting the Sun & Heat In: Not All Windows are Created Equal Location, Location, Location: North vs South
34 Letting the Sun & Heat In: Not All Windows are Created Equal
35
36
37 Not All Windows are Created Equal Bigger is not better
38 Not All Windows are Created Equal
39 Not All Windows are Created Equal
40 Image Courtesy of Sylvia Martin Not All Windows are Created Equal Window Blings: Curtains
41 Not All Windows are Created Equal Window Blings: Light Shelf Image Courtesy of McGraw-Hill Construction
42 Not All Windows are Created Equal Window Blings: Shutters Image Courtesy of
43 Let There be Light (and heat)! Material and color selection Move the heat to where you want it
44
45 Then the Night Falls
46
47 Other ways to keep heat in
48 Other ways to keep heat in
49 Intense Systems- Passive System on Steroids Trombe Wall Photo Courtesy of WM Architects
50 Intense Systems- Passive System on Steroids Trombe Wall Solar Hot Shower Photo Courtesy of Relax Shax
51 Too hot?
52
53
54 Living Solar Devices
55 Living Solar Devices
56 Living Solar Devices Photo Courtesy of Homedit.com
57 Gardening Choosing the right spot for the right plants Plan ahead- plants do get taller
58 Gardening- choose the right spot Option 1: Solar Pathfinder (expensive) Photo Courtesy of Solar Pathfinder
59 Gardening- choose the right spot Option 2: SketchUp (free, with some labor involved)
60 Gardening- choose the right spot Option 3: Wait and see, and take pictures (free, most accurate) Take pictures while standing at the same spot, at regular intervals (every month or so) on sunny days.
61 Photo Courtesy of Solar Cookers International Other Passive Solar Use Cooking
62 Other Passive Solar Use Cooking Distilling Water Photo Courtesy of Solarwala
63 Other Passive Solar Use Cooking Distilling Water Cloth Drying Photo Courtesy of PPL Motor Homes
64 But, I Want Shiny Toys Laundromat dryer: $1.00 a load Gas Dryer $350 + $0.12 a load Break even in 398 loads If you do two loads a week: 398 loads = 199 weeks (~3 years, 10 months)
65 But, I Want Shiny Toys Laundromat dryer: $1.00 a load Clothesline: $12 for 100 feet of cotton line Break even in 12 loads If you do two loads a week: 12 loads = 6 weeks!
66 But, I Want Shiny Toys Solar Photovoltaic Panel (average cost in Illinois in 2013): At $4.25/Watt, A 2kW system = $8,500 (8 panels or so, not counting any incentives)
67 But, I Want Shiny Toys Solar Photovoltaic Panel = $8,500 Average Sunlight = 4.2 hours a day 2kW array generates 8.4 kwh a day Average household uses 30 kwh a day An average household in Chicago would pay ComEd $0.106 per kwh (about $93 a month) 8.4kWh x = $0.804 saving per day Break even in 10,572 days (28.9 years)
68 But, I Want Shiny Toys Solar Photovoltaic Panel = $8,500 Average Sunlight = 4.2 hours a day 2kW array generates 8.4 kwh a day I use 6.6 kwh a day at $0.189 per kwh to ComEd 8.4kWh x = $1.59 saving per day Break even in 5,346 days (14.6 years)
69 But, I Want Shiny Toys Solar Photovoltaic Panel = $5,000 (with current Illinois incentive at $1.50 per watt) 2kW array generates 8.4 kwh a day I use 6.6 kwh a day at $0.189 per kwh to Comed 8.4kWh x = $1.59 saving per day Break even in 3,145 days (8.6 years)
70 What does it all mean? Active Solar System is financially viable IF you first reduce your energy use. Passive Solar is much cheaper and easier to implement. Passive Solar might be more labor intensive, but less likely to break and cheaper to fix. Which is better for you? It is all up to you.
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