This study takes the solar-air source heat pump heating system as an example. Based on the joint optimization of system capacity configuration and operation strategy
we propose an exergy-carbon flow node carbon potential calculation method that considers energy quality differences. This method is applied to the solar-air source heat pump heating system at a university campus in Xi'an. The results showed that in terms of natural conditions
solar irradiance is not significantly correlated with nodal carbon intensity
but there is a significant negative correlation between outdoor temperature and nodal carbon intensity. In terms of system performance
there is a significant negative correlation between the solar collector efficiency
the performance of the air source heat pump
and node carbon intensity. Compared to the conventional node carbon potential calculation method that does not consider exergy
the exergy-carbon flow node carbon potential calculation method yields higher results. The difference between the two methods increases as the heat load decreases. In the supply network
from 01:00 to 08:00
the difference between the two node carbon intensity calculation methods is small
stabilizing around 2%. However
from 09:00 to 13:00
the difference significantly increases
reaching up to 13%. From 14:00 to 24:00
there is no significant difference between the results of the two methods. In the return network
the difference between the two node carbon intensity calculation methods is particularly pronounced during both the 01:00 to 08:00 and 09:00 to 13:00 periods
exceeding 10%. From 14:00 to 24:00
there is no significant difference between the results of the two methods.
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