Abstract
This report indicates that the project progress has met the Go criterion, i.e. demonstrating favorable results of life cycle cost assessment for the redesigned CCHPs. Considering the market price of a baseline heat pump, and required improvements in heat exchangers, fans and an electronic expansion valve of the CCHPs, we estimated that the CCHP using a 3-stage scroll compressor will incur with a cost increment of $386 per rated cooling tonnage, and the CCHP using tandem compressors will increase by $770.
Based on the energy savings of the CCHPs, simulated by EnergyPlus, the two CCHPs achieve payback periods less than 4 years among all the cold climate cities. Within a typical heat pump life cycle of 20 years, the CCHPs can achieve cost savings around $2000 per rated cooling tonnage, and the savings are even higher for the extremely cold cities like Duluth and Fairbanks.
