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Heat Pump Efficiency

Heat Pump Efficiency. By: Chislon Chow Objective: To explore the validity of the claims of heat pumps. Heat Pump Efficiency Overview. Ground source, air source heat pumps: “2 to 3 times more efficient” Transfer of heat instead of creating. Tennessee Valley. Ratings of Efficiency.

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Heat Pump Efficiency

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  1. Heat Pump Efficiency By: Chislon Chow Objective: To explore the validity of the claims of heat pumps

  2. Heat Pump Efficiency Overview • Ground source, air source heat pumps: “2 to 3 times more efficient” • Transfer of heat instead of creating Tennessee Valley

  3. Ratings of Efficiency • EF (energy factor) • Furnaces < 1, HP >= 2 • COP (coefficient of performance) • Furnaces < 1, HP >= 2 • Non-standard • SEER (Seasonal Energy Efficiency Ratio) • HSPF (Heating Seasonal Performance Factor)

  4. Factors Affecting Efficiency • Supplemental heat • Cycling losses • Defrost (air source) • Buildings that need lots of hot water • Steady need for AC • Mild or cool climates

  5. Findings • Ratings not easily comparable with furnaces • HP sometimes needs to create heat too • Ground source • Generally 2.5-4 times more efficient • Air source HP efficiency depends on climate • Can be up to 1.5 to 3 times more efficient

  6. Sources • http://energyoutlet.com/res/heatpump/ • http://energyoutlet.com/res/heatpump/efficiency.html • http://homeenergy.org/archive/hem.dis.anl.gov/eehem/97/970710.html • http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/heatpump.html • http://tva.apogee.net/res/rehpeff.asp • http://www.eere.energy.gov/femp/technologies/eep_electric_waterheaters.cfm • http://www.energy.wsu.edu/ftp-ep/pubs/building/res/ht_pmp_water_htrs.pdf • http://www.energyright.com/heatpump/dare2compare.htm • http://www.energystar.gov/index.cfm?c=airsrc_heat.pr_as_heat_pumps • http://www.energystar.gov/index.cfm?c=airsrc_heat.pr_as_heat_pumps • http://www.energystar.gov/index.cfm?c=geo_heat.pr_geo_heat_pumps • http://www.flex.net/~lonestar/hpumps.htm • http://www.fsec.ucf.edu/bldg/pubs/pf362/ • http://www.ornl.gov/sci/btc/apps/hotwater.html • http://www.pueblo.gsa.gov/cic_text/housing/energy-savers/shoppingguide.html

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