Design and operation of a 180 kWh PCM heat storage at the Flaubert substation of the Grenoble urban heating network

Bentivoglio, Fabrice; Rougé, Sylvie; Soriano, Olivier; Sousa, Ana Tempass de

doi:10.1016/j.applthermaleng.2020.116402

Cited by 27 publications

(14 citation statements)

References 32 publications

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“…To ensure the validity of both the PCM modeling approach and the PCM tank dynamic global model, obtained results were compared with experimental results from the literature [35,36,38]. Medved et al [35] have experimentally measured the variation of the PCM heat capacity with the temperature.…”

Section: Properties Valuementioning

confidence: 99%

“…This result indicates that the proposed approach can estimate with good accuracy the PCM heat capacity variation in both the sensible heat transfer domain (constant low values of Cp) and the latent heat transfer domain (a jump of Cp with T). This validated PCM heat capacity function is used in the PCM tank model, and the simulation results were compared with real-scale shell-and-tube PCM tank measurements [38]. The present PCM tank has the same used design in the experimental work of [33] where it is used to provide hot water for a district heating substation in France.…”

Section: Properties Valuementioning

confidence: 99%

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Dynamic Investigation of a Coupled Parabolic Trough Collector–Phase Change Material Tank for Solar Cooling Process in Arid Climates

2023

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The use of solar energy for cooling processes is advantageous for reducing the energy consumption of conventional air-conditioning systems and protecting the environment. In the present work, a solar-powered cooling system with parabolic trough collectors (PTC) and a phase change material (PCM) tank is numerically investigated in the arid climates of Saudi Arabia. The system contains a 160-kW double-effect absorption chiller powered by solar-heated pressurized water as a heat transfer fluid (HTF) and a shell and tube PCM as a thermal battery. The novelty of this paper is to investigate the feasibility and the potential of using a PTC solar field coupled to a PCM tank for cooling purposes in arid climates. The numerical method is adopted in this work, and a dynamic model is developed based on the lumped approach; it is validated using data from the literature. The functioning of the coupled system is investigated in both sunshine hours (charging period) and off-sunshine hours (discharging period). The PTC area in this work varies from 200 m2 to 260 m2 and the cooling capacity of the chiller ranges from 120 kW to 200 kW. Obtained results showed that the 160-kW chiller is fully driven by the 240 m2-solar PTC during the charging period and about 23% of solar thermal energy is stored in the PCM tank. It was demonstrated that increasing the PTC area from 220 m2 to 260 m2 leads to a reduction in the PCM charging time by up to 45%. In addition, it was found that an increase in the cooling loads from 120 kW to 200 kW induces a decrease in the stored thermal energy in the PCM tank from 450 kWh to 45 kWh. During the discharging period, the PCM tank can continue the cooling process with a stable delivered cooling power of 160 kW and an HTF temperature between 118 °C and 150 °C. The PCM tank used in the studied absorption chiller leads to a reduction of up to 30% in cooling energy consumption during off-sunshine hours.

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Section: Properties Valuementioning

confidence: 99%

Section: Properties Valuementioning

confidence: 99%

Dynamic Investigation of a Coupled Parabolic Trough Collector–Phase Change Material Tank for Solar Cooling Process in Arid Climates

2023

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“…Heat storage is a key component for next generation of urban heating networks to deal with the shift between intermittent production and heat demand. Latent Heat Thermal Energy Storage (LHTES) systems are particularly suitable for decentralized heat storage applications directly in the building substations of a district heating network [1], [2]. To be competitive with centralized sensible heat storage systems, the development of new Phase Change Materials (PCM) with high energy storage densities is necessary.…”

Section: Introductionmentioning

confidence: 99%

Xylitol Used as Phase Change Material: Nucleation Mechanisms of the Supercooling Rupture By Stirring

Piquard¹,

Gagnière²,

Largiller³

et al. 2022

Atlantis Highlights in Engineering

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Owing to its high energy density, Xylitol is a very promising Phase Change Material (PCM) for low temperature applications (< 100°C). However, it presents a high and persistent supercooling that inhibits the latent heat restitution during thermal discharges. Bubbling in the supercooled PCM is known as an efficient way to trigger Xylitol crystallization. This paper proposes an experimental investigation leading to a new description of the nucleation mechanisms behind this triggering technique based on secondary nucleation. Adding a seeding step to the crystallization process is also proposed to increase the efficiency and reproducibility of the heat restitution.

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“…As an inevitable choice to solve the energy crisis and environmental problems, multi regional integrated energy system has become the focus of all sectors of society [1] . The reviews of microgrid are generally limited to the summary of planning and design, control methods and protection strategies, and there is no summary to integrate them [2] .…”

Section: Introductionmentioning

confidence: 99%

Multi region integrated energy system planning method considering the dynamic characteristics of heat supply network

Wang¹,

Zhang²,

Li³

2022

J. Phys.: Conf. Ser.

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In view of the poor effect of current heat supply network energy system planning, a multi regional comprehensive energy system planning method based on the dynamic characteristics of heat supply network is proposed, the equipment structure of energy hub is optimized, and the evaluation index and algorithm of multi regional comprehensive energy system planning are constructed to ensure the effect of multi regional comprehensive energy system planning with the dynamic characteristics of heat supply network. Finally, it is confirmed by experiments. In practical applications, the method in this paper is highly adaptable and can meet the research requirements.

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Design and operation of a 180 kWh PCM heat storage at the Flaubert substation of the Grenoble urban heating network

Cited by 27 publications

References 32 publications

Dynamic Investigation of a Coupled Parabolic Trough Collector–Phase Change Material Tank for Solar Cooling Process in Arid Climates

Dynamic Investigation of a Coupled Parabolic Trough Collector–Phase Change Material Tank for Solar Cooling Process in Arid Climates

Xylitol Used as Phase Change Material: Nucleation Mechanisms of the Supercooling Rupture By Stirring

Multi region integrated energy system planning method considering the dynamic characteristics of heat supply network

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