题名: |
Cooling and Heating Season Impacts of Right-sizing of Fixed- and Variable-capacity Heat Pumps With Attic and Indoor Ductwork. |
作者: |
Cummings, J.; Withers, C.; Kono, J. |
关键词: |
Residential, Residential Buildings, BA-PIRC, Building America, HVAC Sizing, Variable capacity heat pump, Indoor ductwork, IQ drive, Over-sized systems, Seasonal energy savings, Peak demand energy savings |
摘要: |
A new generation of central, ducted variable-capacity heat pump systems has come on the market, promising very high cooling and heating efficiency. They are controlled differently than standard fixed-capacity systems. Instead of cycling on at full capacity and then cycling off when the thermostat is satisfied, they vary their cooling and heating output over a wide range (approximately 40% - 118% of nominal full capacity), thus staying 'on' for 60% - 100% more hours per day compared to fixed -capacity systems. Experiments in this research examined the performance of 2-ton and 3-ton fixed- and variable-capacity systems and the impacts of system oversizing. |
报告类型: |
科技报告 |