Carbon footprints of large compression chillers for district cooling – accounting for temporal resolution of the electricity supply
Author:
WEBER Rosa1, RIXRATH Doris1, SCHAUER Raphael1, KRAIL Jürgen1, PIRINGER Gerhard1
Affiliation:
1. Department Energy and Environment, University of Applied Sciences Burgenland, Pinkafeld, Austria
Abstract
Compression chillers are a common technology used in district cooling networks, with fluctuating cooling
loads and consuming different electricity mixes at different times. This work aims to study these effects on the CFs of
operating three compression chillers in a district cooling plant in Austria, using LCA-based CF modelling. Electricity
consumption dominates the chillers’ CFs. While using the annual average electricity mix overestimated the CF for
two warm-season and mixed-season chillers by 12% and 1%, respectively, it underestimated the CF for a mainly coldseason
chiller by 6 %. Seasonal changes in electricity mixes and cooling loads were well suited to explain the calculated
CF deviations and should be accounted for in carbon footprints dominated by renewables-rich electricity consumption.
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