Environmental and economical analyses of transcritical CO2 heat pump combined with direct dedicated mechanical subcooling (DMS) for space heating in China

By B. Dai, Haifeng Qi, Shengchun Liu, Zhifeng Zhong, Hailong Li, Mengjie Song, Muyu Ma, Zhili Sun. Energy Conversion and Management, 2019

214 citations recorded by the source corpus.

Abstract An environmental and economical assessment model is developed, in order to evaluate the performances of transcritical CO 2 heat pump system with dedicated mechanical subcooling (CO 2 HP DMS ). Introducing DMS to traditional CO 2 HP system is an efficient method to reduce the primary energy consumption, which can be further decreased by using small temperature difference fan-coil unit (STD-FCU) as heating terminal. Using CO 2 heat pump system for space heating is an environmentally-friendly heating method. The corresponding pollution emissions are only inferior to those of the wall hanging gas heater. The initial capital cost and operating cost of CO 2 HP DMS system are both lower than those of CO 2 HP BASE system, and the CO 2 compressor cost accounts for about 80% of the overall initial capital cost. In contrast to other traditional heating methods, the payback periods of CO 2 HP DMS system are not more than 9 years in most cases. If the CO 2 compressor and electricity price are reduced by 20% and 28.79% respectively, the life cycle cost of CO 2 HP DMS will be competitive to that of coal-fired boiler. In China, it is a promising way to adopt CO 2 HP DMS for space heating in the near future with the assistant of electricity price subsidy and compressor price reduction.

Subfields: Biomedical Engineering, Building and Construction, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/a4b22c68c3d31cb6eda4d99b0c01336c39214b03