Impact of seasonal thermal energy storage design on the dynamic performance of a solar heating system serving a small-scale Italian district composed of residential and school buildings

Rosato, Antonio; Ciervo, Antonio; Ciampi, Giovanni; Scorpio, Michelangelo; Sibilio, Sergio

doi:10.1016/j.est.2019.100889

Cited by 43 publications

(8 citation statements)

References 34 publications

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“…In addition to normal heat storages which are used to buffer heat for a short period, seasonal heat storages are also implemented in the heating sector, with which heat generation and heat consumption can be decoupled over several months (cf. [13]- [15]). The integration of renewable heat generators into existing systems is correspondingly linked to the problem that the storage strategy was developed considering the operation of the CHP plants, as these had previously represented the central element of the described energy systems.…”

Section: Components Of Heat Supply Systemsmentioning

confidence: 99%

Comparison of Strategies for Thermal Storage Operation to Increase the Share of Renewable Energy in District Heating Systems

Witte-Humperdinck¹,

Thommessen²,

Nigbur³

et al. 2021

Atlantis Highlights in Engineering

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Combined heat and power (CHP) plants are the main supply source in Germany's district heating systems (DHS). Usually the generated power is fed into the power grid. Because CHP plants normally come along with thermal storages the heat supply operation is flexible, so that the electricity production can be optimized, e.g. by producing at times with attractive in-feed tariffs. However, in the course of the necessary transformation of all energy systems, renewable energy sources are increasingly being integrated into existing infrastructures. DHS operators are also involved in the expansion of renewable heat, e.g. by implementing solar thermal plants or large-scale heat pumps. In order to increase the share of renewable energy in DHS, thermal storage operation becomes essentially important. On the one hand, as much renewable heat as possible should be used or stored and on the other hand, CHP plants must run and fill t he s torage i f t he r ecoverable a mount f rom t he electricity sector is economically justifiable. B oth i mply l ess f ree storage capacity, whereas the chronological harmonization of loading and unloading plays an important role. The contribution of this paper is an analysis on different operation strategies for thermal storages to increase the share of renewable energy in urban DHS. Furthermore, the influence of heat load prediction and electricity price forecasting on thermal storage operation is derived. Results of a comparison of typical storage operation methods on a use case show that under the current legal framework conditions a flexible t hermal s torage o peration i s e ligible t o m eet several targets, i.e. increasing the share of renewable energy, securing the supply of heat to the DHS and ensuring an economic operation of the entire portfolio.

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Section: Components Of Heat Supply Systemsmentioning

confidence: 99%

Comparison of Strategies for Thermal Storage Operation to Increase the Share of Renewable Energy in District Heating Systems

Witte-Humperdinck¹,

Thommessen²,

Nigbur³

et al. 2021

Atlantis Highlights in Engineering

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“…Therefore, the greater overall surface areas of deeper boreholes could also increase performance during energy storage. Modelling studies for BTES focus on shallow borehole heat exchanger (BHE) arrays and the impact of engineering design parameters, such as the number of BHEs in an array, array geometry, BHE spacing, BHE depth, material property variations and level of water saturation within the ground [55,60,63,49,51,59,9]. Some have gone further to investigate heat transfer in shallow geothermal piles, identifying the spiral configuration as an alternative heat exchanger with a high heat transfer efficiency [10,11].…”

Section: Introductionmentioning

confidence: 99%

Repurposing a deep geothermal exploration well for borehole thermal energy storage: Implications from statistical modelling and sensitivity analysis

Brown

Kolo

Falcone

et al. 2023

Applied Thermal Engineering

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“…Renaldi et al [19] used calculations in TRNSYS for techno-economic analysis of a solar thermal system with seasonal heat storage in the UK. TRNSYS can also be used to simulate the operation of systems with different types of heat stores, such as BTES [20][21][22], TTES [23,24], ATES [25] and PTES [26].…”

Section: Introductionmentioning

confidence: 99%

Solar Heating for Pit Thermal Energy Storage – Comparison of Solar Thermal and Photovoltaic Systems in TRNSYS 18

Słomczyńska¹,

Mirek²,

Panowski³

2022

Adv. Sci. Technol. Res. J.

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Solar collectors and photovoltaic panels are devices widely used for heating water for both heating and domestic purposes. Due to the variable nature of solar radiation, it is advisable to include in solar energy-based systems thermal storages that accumulate energy at times of overproduction and discharge it at times of demand. In this paper, we present the results of simulation research to compare the possibility of two different charging systems for a 24000 m 3 seasonal pit thermal energy storage. The first uses electricity generated by photovoltaic panels and converted to heat in an electrode boiler to charge the heat store. The second is utilising a solar collector for this purpose. Based on the simulation calculations carried out in TRNSYS 18, it can be concluded that, from an investment perspective, a system based on solar collectors is more cost-effective. In addition, the installation takes up less space compared to a photovoltaic panel farm.

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Impact of seasonal thermal energy storage design on the dynamic performance of a solar heating system serving a small-scale Italian district composed of residential and school buildings

Cited by 43 publications

References 34 publications

Comparison of Strategies for Thermal Storage Operation to Increase the Share of Renewable Energy in District Heating Systems

Comparison of Strategies for Thermal Storage Operation to Increase the Share of Renewable Energy in District Heating Systems

Repurposing a deep geothermal exploration well for borehole thermal energy storage: Implications from statistical modelling and sensitivity analysis

Solar Heating for Pit Thermal Energy Storage – Comparison of Solar Thermal and Photovoltaic Systems in TRNSYS 18

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