Using nature gas and air source heat pumps (ASHP) to replace the household coals and coal-fired boilers for heating was proposed in this study. The primary energy efficiencies, pollutant emission reductions and economic viability of different heating systems were calculated and analyzed based on Jing-Jin-Ji Region's scenario. The results showed that the primary energy efficiencies of the nature gas-based and ASHP-based heating systems could be improved by 31and 44percentage points, respectively, comparing to the original coal-based heating system. The emissions of the main pollutants could be significantly reduced. Specifically, the nature gas-based heating system and ASHP-based heating system could decrease the PM, SO2 and NOxemissions by 74.6, 332.6, 80.6 thousand tons, and 74.8, 332.1, 93.6thousand tons, respectively. The economic performance revealed that though the initial investment costs of ASHP-based heating system were greater than that of nature gas-based heating system, the annualized fuel costs were much lower. Besides, the specific costs of the pollutant emission mitigations of the nature gas-based heating system were 14.2 Chinese Yuan/kg higher than ASHP-based heating system, meaning that the ASHP-based heating system features better comprehensive performance as compared with the nature gas-based heating system.%针对京津冀地区实施天然气和电能驱动空气源热泵(简称:热泵)替代燃煤(散烧煤和锅炉煤)供暖系统的一次能源效率、污染物减排量及经济性进行了对比计算.结果表明:对于京津冀地区,采用天然气和热泵替代燃煤供暖可使一次能源效率分别上升31%和44%;天然气和热泵供暖都可大幅降低污染物排放,天然气供暖可使烟尘、SO2和NOx分别减排7.46,33.26,8.06万t;热泵供暖则分别减排7.48,33.21,9.36万t;热泵供暖的初投资高于天然气供暖,但其年燃料费用远低于天然气供暖;此外,基于烟尘、SO2、NOx 3种污染物减排总量,计算得出天然气供暖改造的单位污染物减排成本较热泵供暖改造高14.2元/kg,综合对比发现,热泵供暖更具优势.
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