Boilers By Jason Ng Objectives Effectively compare and
Boilers By: Jason Ng
Objectives ¢ Effectively compare and contrast different types of water heating systems in order to enlighten students about proper choice making when it comes to choosing a heating system for a home.
Selection Criteria ¢ Types of water heaters l l l Conventional Storage Demand water heaters Heat Pumps Solar Water heaters------ Tankless coil or Indirect heaters ¢ Energy Efficiency ¢ Fuel types ¢ Size
Tankless Coil Water Heaters Provides hot water on demand, without a tank ¢ Works most efficiently during cold months ¢ Energy is wasted during warm months ¢
Indirect Water Heaters Storage tank required ¢ Allows boiler to work less often ¢ More efficient for homes ¢ Works well with radiant floor heating systems ¢
Fuel Cost Comparison Chart Estimated Annual Heating Cost for Selected Fuels Heating Efficiency Fuel Cost Energy use/1500 ft 2 Energy Cost for a well insulated 1500 ft 2 home Electric Resistance 3413 Btu/k. Wh 100% $0. 03/k. Wh 23440 k. Wh $703. 20 Propane 92000 Btu/gal 92% $0. 90/gal 945 gal $850. 50 Natural Gas 100000 Btu/th erm 92% $0. 70/therm 870 therms $609. 00
Efficiency Rating : Energy Factor (EF) ¢ EF based on: Recovery efficiency l Stand by losses l Cycling losses l Higher EF = Higher Efficiency ¢ Higher EF does not necessarily mean lower costs ¢
Conclusion ¢ After having listened and comprehended the information presented, one should now have enough understanding of water heating systems in order to make an informed decision about what kind of systems to use for different needs
References ¢ ¢ ¢ http: //www. eere. energy. gov/femp/technologies/eep_bo ilers. cfm http: //www. eere. energy. gov/consumer/your_home/wat er_heating/index. cfm/mytopic=13020 http: //www. purityplanet. com/hot-water-heaters. aspx http: //doityourself. com/waterheater/hotwaterbuying. htm http: //www. savemoreonheat. com/residential_products/ default. asp http: //www. onesmartfart. com/home/water_heater. php
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