1 / 20

Too Hot to Handle, Too Cold to Hold

Too Hot to Handle, Too Cold to Hold. How to save up to 40% on your energy bill. Your Appliance IQ. Where do you use your other 27%? What rooms of the house? What activities?. http://www.a1arefrigeration.com/appliances_main.jpg. How Much Does it Use?. How Much Are You Paying?.

shayna
Download Presentation

Too Hot to Handle, Too Cold to Hold

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Too Hot to Handle, Too Cold to Hold How to save up to 40% on your energy bill

  2. Your Appliance IQ • Where do you use your other 27%? • What rooms of the house? • What activities? http://www.a1arefrigeration.com/appliances_main.jpg

  3. How Much Does it Use?

  4. How Much Are You Paying?

  5. Single biggest source of personal energy use Heating: The Big One • 40% of personal energy use (more in WI) http://slices-of-life.com/wp-content/uploads/2011/10/house_heating.jpg

  6. Some Like it Hot: How We Get Heat • Gas Heating • Electric Heating • Wood Stove • Geothermal http://fela2fela.files.wordpress.com/2012/03/calcifer.jpg

  7. Electric Burn fuel to produce heat Heat water to make steam Use steam to run turbine Use turbine to power generator Make electricity Use resistor to make heat Gas vs Electric What's Hot What's Not? • Gas • Burn fuel to produce heat http://www.cheyennelight.com/images/gas2.jpg

  8. Electric heat uses 2-3 times as much gas from plant to house. • How much more does it cost to use an electric heater? • Which is better, gas or electric? http://thomaspmbarnett.com/storage/natural_gas_flame_money_z.jpg?__SQUARESPACE_CACHEVERSION=1331816254251

  9. Other Hydro Wind Tide Solar PV Ways to Make Electricity • Heat Engines • Coal plants • Gas plants • Nuclear plants • Solar thermal • Biomass http://1.bp.blogspot.com/_mtCwxRRYyt4/TUBT187mkSI/AAAAAAAAAAU/p3-MLQDfmIY/s1600/renewable+energy+overview.gif http://upload.wikimedia.org/wikipedia/en/thumb/a/a2/Heat_engine.png/300px-Heat_engine.png

  10. Other Electric No fuel burned to create electricity, free resources Electricity can be converted to heat at 100% efficiency Take up a lot of space (square feet per megawatt) Heat Engines vs Other Electric Revisited • Heat Engines • Maximum efficiency limited by thermodynamics (physics) • Power plants are 30-50% efficient • What happens to the other half? • Waste heat! • Can we use the waste heat to produce more work?

  11. Waste Heat 100 GJ/yr = 3.17 kW…like every person in WI had 3 hair dryers running 24/7 the whole year. http://www.stwing.upenn.edu/~salexa/Research-WasteHeat.htm

  12. Heat Pumps and Geothermal Heat http://t2.gstatic.com/images?q=tbn:ANd9GcRBitbxhT9R3EbwtjHmCfnO7HJ1_xL3X0cM8ACX3q8inJxIM9BVTw • What is a heat pump? • Heat engine in reverse (same idea as a refrigerator) • Put work in to get heat flow

  13. So How Do They Work? You need a “working fluid” to transport the energy where you want it to go. This must be pumped around. The work needed is proportional to the difference between the outside and inside temperatures. http://www.envirowarm.co.uk/img/heatpump.png

  14. The Nitty Gritty on Heat Pumps As the temperatures get nearer, you need less and less work to get heating/cooling. Geothermal cooling is 75% more efficient than the refrigerator in your kitchen. http://3.bp.blogspot.com/-Jv2Hk3xoLX4/TdOiOZsDRgI/AAAAAAAABko/UetT6_RmBf8/s400/im-in-your-fridge-cat.cats.kitten.kitty.pic.picture.funny.lolcat.cute.fun.lovely.photo.images.jpg

  15. What Does This Mean?Three Ways to Eliminate Paying For Space and Water Heating • Option 1 • Harnessing waste heat from power plants would more than meet the space/water heating needs of all the US (residential). • Can we do it? • Option 2 • Integrated renewables (solar/wind) provide “free” energy resources that can be converted completely to heat. • Option 3 • Geothermal heat pumps achieve the desired heat transfer with minimal work input. http://t0.gstatic.com/images?q=tbn:ANd9GcRY6ldjvFdbNv1yzHxQODUdh2Bl-FXF_Qo2nA4r9X3Ix27PEeqd

  16. A Caveat: Quality of Energy If we can convert energy into work, it’s more useful (ie higher quality). The quality of thermal energy (heat) is proportional to how much higher its temperature is than the surroundings. Mechanical energy and electricity are the highest quality (convert into any form 100%). Are electricity and high energy density fuels the best way to heat our houses and water? http://www.stwing.upenn.edu/~salexa/Research/WasteHeat/WasteHeatMatrix.png

  17. A Re-envisioned Power Grid “Figure 4 - Results from this study highlight the benefits of a alternate energy consumption paradigm where power is generated in a distributed fashion, maximizing waste heat recovery opportunities and reducing primary energy consumption” http://www.stwing.upenn.edu/~salexa/Research-WasteHeat.htm

  18. A Final Thought Use the right quality energy for the job! http://www.rallydev.com/agileblog/wp-content/uploads/2011/11/quality-control.jpg

  19. In Summary When it comes to conserving energy and saving money, there are a few key ideas. For “high” temperature applications, gas saves 67% on energy and cost. (Hotter than you want to touch). For space/water heating, we have an excess of waste heat from power plants and an abundance of geothermal heat. To fill in gaps and further reduce costs, integrated renewables (wind/solar) are a cure-all.

More Related