Off-line urban building energy model reproducibility against ‘observed’ anthropogenic heat and electricity consumption

Here we verify an off-line urban building energy model (CM-BEM) against ‘observed’ anthropogenic heat and electricity consumption at Tokyo (Yoyogi) residential area. Anthropogenic heat (Q_F) due to electricity air-conditioning (AC) use (Q_{F, AC}) is estimated by continuous simultaneous observations of atmospheric O₂, CO₂ and turbulent CO₂ and heat fluxes. Here we explain the outline of how to estimate Q_{F, AC}. (1) The O₂:CO₂ exchange ratio (oxidation ratio, OR) is used for the partitioning of CO₂ into emissions from gas fuels and gasoline (see detail in Ishidoya et al. 2020), which allow estimating Q_F from gas fuels and gasoline (Q_{F, gas} and Q_{F, traffic}), respectively. (2) Total Q_F is estimated by turbulent heat fluxes and net radiation observations using a heat balance equation within the constant flux layer. Finally (3) the Q_{F, AC} is estimated by ‘Total Q_F – (Q_{F, gas} + Q_{F, traffic})’. This estimation allows verifying directly simulated Q_{F, AC} by the CM-BEM. Our aim is an improvement of the CM-BEM to develop more realistic Q_F and CO₂ inventory data. Here we compare simulated Q_{F, AC}, electricity consumption, and turbulent heat fluxes against observations during winter (Jan-Feb 2017) and summer (July-Aug 2018) seasons at Tokyo. Our results will be reported at the conference.

Ref.

Ishidoya et al. 2020: Consumption of atmospheric O₂ in an urban area of Tokyo, Japan derived from continuous observations of O₂ and CO₂ concentrations and CO₂ flux. Atmospheric Chemistry and Physics Discussions. under review.