On the necessity to integrate power flexibility in cooling systems

Vuarnoz, Didier (School of Engineering and Architecture (HEIA-FR), HES-SO // University of Applied Sciences Western Switzerland) ; Niederhäuser, Elena-Lavinia (School of Engineering and Architecture (HEIA-FR), HES-SO // University of Applied Sciences Western Switzerland) ; Torregrossa, Dimitri (School of Engineering and Architecture (HEIA-FR), HES-SO // University of Applied Sciences Western Switzerland) ; Gabioud, Dominique (School of Engineering, HES-SO Valais-Wallis, HEI, HES-SO // University of Applied Sciences Western Switzerland)

Today, cooling systems are widely used, notably with the unprecedented growth of data centres and building space cooling. These thermodynamic systems are powered mainly with electricity, and their peak loads are generally associated with very high carbon footprints. At the same time, congestion of the grid due to high load or renewable power injection is becoming an issue for all actors involved with electricity (producers, providers, consumers, and prosumers). Actually, both the price and associated carbon footprint of electricity usually fluctuates along with the charge of the network. This paper discusses the integration of power flexibility (PF) in new and existing cooling systems to avoid a possible cold crunch in the near future. After defining PF, several cooling systems archetypes are presented. Three possible ways to integrate PF are explained: flexibility by thermal inertia and energy storage (thermal and electrochemical). While PF principally targets the reduction of stress on the electric grid, other benefits can also be achieved, e.g. mitigation of direct carbon emissions and decrease of costs related to operating the refrigeration system. We explain how better management of energy transits and possible imbalance in electricity networks can be achieved by thermal inertia. The choice of integrating thermal storage or electric battery is discussed, and both solutions are considered in a specific case study. The study aims at better management of power loads on electricity network caused by the cooling system and could be useful for anyone involved with grid management and/or refrigeration systems.


Conference Type:
full paper
Faculty:
Ingénierie et Architecture
School:
HEIA-FR
HEI-VS
Institute:
Energy - Institut de recherche appliquée en systèmes énergétiques
Institut Énergie et environnement
Publisher:
Chongqing, China, 21-23 August 2019
Date:
2019-08
Chongqing, China
21-23 August 2019
Pagination:
10 p.
Published in:
Journal of Physics : Conference Series ; Proceedings of 2019 3rd International Symposium on Green Energy and Smart Grid
DOI:
ISSN:
1742-6588
Appears in Collection:



 Record created 2019-12-03, last modified 2020-06-11

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