On Demand Water Heater
description
Transcript of On Demand Water Heater
On Demand Water HeaterAn Improvement on the Existing Electric Heater
Introduction• Our team
– Antonio DiCianni– Christopher Kaskoun– Vincent Tancredi– Daniel Taurone– Dung Truong
• Our advisor– Dr. Giuseppe Palmese
• Problem Introduction
Problem Background• Existing water heating methods
• Traditional Tank Heater
• Tankless Water Heater• Gas• Electric
• Resistance Heating
Traditional Water Tank Heaters
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Foam Insulation
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Electric-Resistance Instantaneous Water Heater
FLOW OUT FLOW IN
Tankless Water Heater
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• An electric-resistance water heater has electric heating elements submerged in its storage tank.
• Expensive – Electricity costs more per unit of delivered heat than
gas.– require a large power supply.
Electric-Resistance Tankless Water Heater
ENERGY SOURCE ELECTRICITY
MINIMUM EFFICIENCY RECOMMENDED .94 EF
MAXIMUM EFFICIENCY AVAILABLE .96 EF
EXPECTED LIFE 13 years
ARROXIMATE COST TO INSTALL $400-$800
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• Size Constraints • Electrical Consumption• Viability
• Installation• Lifespan• Maintenance
• Cost• Safety
Criteria for Success
Possible Solutions: More Insulated Pipes
Currently• For tanks and exposed pipes• InefficientModified solution • Insulate ALL pipes• Materials
– Polyethylene, Neoprene Foam, Fiberglass Wrap, Polyurethane
– Inexpensive– Self Installation
Cold Water Flow
Hot Water Flow
KEY
Tank Water Heater
AppliancesHeat Lose
Primary Source of Shower Temp Fluctuations
Typical Plumbing Schematic for a Single Family Dwelling
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Ground Water Inlet
Possible Solutions: Modified Mixer Valve
Currently• Manually set to mix hot and cold water• Fluctuating temperatureModified Solution• New mixer to automatically detect
fluctuation and adjust to keep proportion• Changes:
– Laser detection– Software system
• Monitor• Adjust
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Possible Solutions: Pros and Cons Thus Far
Pros ConsMore 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
Possible Solutions: To the Source
Analyzing point of energy usage• On all the time• Where most energy is lostMission: Design New Heating system for
the shower• Pros
– Will not be on all the time– Heat at the point of usage: no wasted water
• Problem: Heat and Power source
Possible Solutions: Types of Hot Water Tanks
Top Choice: Electric
Possible Solution: On Demand Water Heater
Currently• Electric showers and tank-less water
heater• Inefficient, slow, power usageSolution• Heating in or through pipes by electric
power• Possible methods
– Block (outside)– Coil (outside)– Electric Cartridge (Inside)
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The Ideal Solution• On Demand Water Heater
• Design• Improved heating mechanism • Fin System
• Benefits• Easy Installation• Maintenance• Safety Device• Energy Conservation• Cost Efficiency
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Implication of fin system stemming off of the cartridge heater
The Ideal Solution
Pre-manufactured Cartridge with Fin System Easy Installation into Piping
The Ideal Solution
Schematic of our Design
Research Conducted P = (m/t)C∆T
Temperature OutMax Energy
needed Minimun Specific
HeatH2OJ/g◦C
Flow Rate (gram/sec)
Temperature ◦C
Min (ground water ◦C)
Max ◦C J/sec J/sec
4.148 63.0902 12.7 12.7 45 8452.850232 0
4.148 126.1804 12.7 12.7 45 16905.70046 0
4.148 189.2706 12.7 12.7 45 25358.5507 0
4.148 252.3608 12.7 12.7 45 33811.40093 0
4.148 315.451 12.7 12.7 45 42264.25116 0
4.148 378.5412 12.7 12.7 45 50717.10139 0
4.148 441.6314 12.7 12.7 45 59169.95162 0
P Power
m Mass
t Time
C Specific Heat
∆T Change in Temperature
Amperage
• Digital Interface
• Calculations to determine effective materials
• Optimal Fin design
• Most Effective Cartridge Heater
Recommendations for Future Work
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• Flaws of previously existing designs
• The ideal design– Meets economic, safety, and comfort standards– Primary design goal
• Decrease energy lose• Increase annual savings
Conclusions & Discussion
Tank Heater
Instantaneous Block
Heater
On-Demand
Fin System
Questions?
Acknowledgments and References
"Electric Tankless Water Heaters." Tankless Water Heaters. 2007. American Tankless Water Heaters. 28 Apr 2007 <http://www.e-tankless.com/tank-water-heater.php>.
"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 <http://www.aceee.org/consumerguide/topwater.htm>.
"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 <http://www.eere.energy.gov/consumer/your_home/water_heating/index.cfm/mytopic=13060>.
“Estimating Water Usage Guidelines.” Wholly Water. 2003. 1 Mar 2007 <http://www.wholywater.com/waterusage.html>.
Ground Water & Drinking Water. 28 Nov 2006. U.S. Environmental Protection Agency. 6 Mar 2007 <http://www.wholywater.com/waterusage.html>.
"Tankless Water Heaters ." Tool Base Services . 25 Feb 2007 <http://www.toolbase.org/TechInventory/TechDetails.aspx?ContentDetailID=599>.
"Water Heating." Energy Efficiancy and Renewable Energy. U.S. Department of Energy. 1 Feb. 2007 <eere.energy.gov>.
"Water Heating." Minnesota Propane Gas Association. 2003. 4 Feb. 2007 <mnpropane.org/homebuilder_water>.