Journal
ENERGIES
Volume 12, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/en12030407
Keywords
district cooling; energy storage; linear programming; tropical climate; integrated energy modelling; energy system optimization; temporal resolution; energy planning; variable renewable energy sources
Categories
Funding
- CITIES project - Danish Innovationsfonden [DSF1305-00027B]
- KeepWarm project - European Union's Horizon 2020 research and innovation programme [784966]
- H2020 Societal Challenges Programme [784966] Funding Source: H2020 Societal Challenges Programme
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The energy transition of future urban energy systems is still the subject of an ongoing debate. District energy supply can play an important role in reducing the total socio-economic costs of energy systems and primary energy supply. Although lots of research was done on integrated modelling including district heating, there is a lack of research on integrated energy modelling including district cooling. This paper addressed the latter gap using linear continuous optimization model of the whole energy system, using Singapore for a case study. Results showed that optimal district cooling share was 30% of the total cooling energy demand for both developed scenarios, one that took into account spatial constraints for photovoltaics installation and the other one that did not. In the scenario that took into account existing spatial constraints for installations, optimal capacities of methane and thermal energy storage types were much larger than capacities of grid battery storage, battery storage in vehicles and hydrogen storage. Grid battery storage correlated with photovoltaics capacity installed in the energy system. Furthermore, it was shown that successful representation of long-term storage solutions in urban energy models reduced the total socio-economic costs of the energy system for 4.1%.
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