5 Scopus citations

Abstract

Quantification of location-specific environmental effects attributable to the operation and future growth planning of integrated energy systems (IES) is an important part of quantitative sustainability analysis. Toward this end, this paper presents a Life Cycle Assessment methodology which accounts for diurnal and seasonal changes in emission rates from different supply and demand-side energy systems due to variations in the regional power generation energy portfolio mix. The proposed methodology has been illustrated using end-use monitored data for a whole year operation of a university campus IES. The analysis revealed that the average external costs of purchased electricity, specific to the local power utility fuel mix, were about 1.93 ¢/kWh, with ±8% diurnal and ±5% seasonal variations, while externalities from solar photovoltaics were four times lower. Depending on the amount of recovered heat, the externalities associated with the cogeneration system ranged from 1.86 ¢/kWh (with cogeneration total efficiency of 71%) to 4.36 ¢/kWh if no heat is recovered. The novel contribution of the proposed methodology is the ability to evaluate in real-time the environmental externalities associated with demand-side IES which will facilitate real-time sustainable operation of such systems in terms of dynamic building load management and optimal control and operation.

Original languageEnglish (US)
Article number101425
JournalSustainable Cities and Society
Volume46
DOIs
Publication statusPublished - Apr 1 2019

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Keywords

  • Environmental externalities
  • External cost method
  • Integrated energy systems
  • Life cycle assessment (LCA)
  • Sustainability assessment

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Geography, Planning and Development
  • Renewable Energy, Sustainability and the Environment
  • Transportation

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