1. On Demand Water Heater An Improvement on the Existing Electric Heater

2. Introduction

3. Problem Background

4. Traditional Water Tank Heaters http://www.remodelguide.com/improve/plumbing/waterheaters/waterheaters_intro.gif Foam Insulation http://www.mechanotherm.com/images/hot_water_heater2.jpg

5. Electric-Resistance Instantaneous Water Heater FLOW OUTFLOW IN

6. Tankless Water Heater http://www.contractorreferralservice.com/images/HowDoesATanklessWaterHeaterWork_400.jpg http://www.heatershop.com/images/2004_dhc_inside_large_313_423.jpg

7. Electric-Resistance Tankless Water Heater http://hes.lbl.gov/hes/makingithappen/no_regrets/waterheaterelectric.html

8. Criteria for Success

9. Possible Solutions: More Insulated Pipes

10. Cold Water Flow Hot Water Flow KEY Tank Water Heater Appliances Heat Lose Primary Source of Shower Temp Fluctuations Typical Plumbing Schematic for a Single Family Dwelling http://www.grundfos.com/web/HomeUs.nsf/GrafikOpslag/HWR_System/$File/house2.jpg Ground Water Inlet

11. Possible Solutions: Modified Mixer Valve http://www.plumbingpages.com

12. Possible Solutions: Pros and Cons Thus Far ProsCons More Insulated Pipes - Easy to buy and install - Less wait time for hot water - Tearing down parts of walls in kitchen, bath, adjoining rooms where pipes may be found - Still fluctuation - about 4º F retention Modified Mixer Valve - No fluctuation - Installation in one place - Still wasted water and energy - Existing simpler version

13. Possible Solutions: To the Source

14. Possible Solutions: Types of Hot Water Tanks Top Choice: Electric

15. Possible Solution: On Demand Water Heater http://www.inductionheating.com/images/ph_front_coil.jpg

16. The Ideal Solution http://www.omega.com/Heaters/images/CIR_14_l.jpg Implication of fin system stemming off of the cartridge heater

17. The Ideal Solution Pre-manufactured Cartridge with Fin SystemEasy Installation into Piping

18. The Ideal Solution

19. Schematic of our Design

20. Research Conducted P = (m/t)C∆T Temperature Out Max Energy neededMinimun Specific Heat H 2 O J/g◦C Flow Rate (gram/sec) Temperature ◦ C Min (ground water ◦C ) Max ◦C J/sec 4.14863.090212.7 458452.8502320 4.148126.180412.7 4516905.700460 4.148189.270612.7 4525358.55070 4.148252.360812.7 4533811.400930 4.148315.45112.7 4542264.251160 4.148378.541212.7 4550717.101390 4.148441.631412.7 4559169.951620 PPower mMass tTime CSpecific Heat ∆TChange in Temperature

21. Amperage

22. Digital Interface Calculations to determine effective materials Optimal Fin design Most Effective Cartridge Heater Recommendations for Future Work http://www.ubergizmo.com/photos/2006/3/kohler-dtv.jpg

23. Conclusions & Discussion Tank Heater Instantaneous Block Heater On-Demand Fin System

24. Questions?

25. Acknowledgments and References "Electric Tankless Water Heaters." Tankless Water Heaters. 2007. American Tankless Water Heaters. 28 Apr 2007. "Top-Rated Water Heaters." Consumer Guide to Home Energy Savings: Condensed Online Version. December, 2006. American Council for an Energy-Efficient Ecconomy. 28 Apr 2007. "EERE Consumer's Guide: Insulate Hot Water Pipes for Energy Savings." U.S. Department of Energy: Energy Efficiency and Renewable Energy. 12 September 2005. 25 Feb 2007. “Estimating Water Usage Guidelines.” Wholly Water. 2003. 1 Mar 2007. Ground Water & Drinking Water. 28 Nov 2006. U.S. Environmental Protection Agency. 6 Mar 2007. "Tankless Water Heaters." Tool Base Services. 25 Feb 2007. "Water Heating." Energy Efficiancy and Renewable Energy. U.S. Department of Energy. 1 Feb. 2007. "Water Heating." Minnesota Propane Gas Association. 2003. 4 Feb. 2007.