A comprehensive review of geothermal energy storage: Methods and applications

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 98, P. 113019 - 113019

Published: July 27, 2024

Language: Английский

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Solar thermal vs. PV with a heat pump: A comparison of different charging technologies for seasonal storage systems in district heating networks

Energy Conversion and Management X, Journal Year: 2024, Volume and Issue: 22, P. 100564 - 100564

Published: March 12, 2024

The majority of district heating networks (DHNs) in Germany and other European countries are still supplied by fossil fuels. While several possible technical solutions exist to decarbonize DHNs, the problem is availability solar energy – thermal electric or renewable sources during winter. A solution shift available from summer winter using seasonal storage systems. Especially pit systems (PTES) have shown an economic advantage compared types. Therefore, we would like further investigate design PTES under different techno-economic conditions. In this study, charging options for were examined. Solar was photovoltaic (PV), supplying air-source heat pump (ASHP). We developed open-source Python package based on mixed-integer linear programming, minimizing total system cost, i.e., annuity, including opex capex. tool selects, operates, designs converters storages. Furthermore, it optimizes network's capacity operation. optimization takes characteristics existing DHN as input supply across locations (LOCs). model separates hydraulic calculation builds up a multi-stage process consider temperatures inside network PTES. applied Eastern Germany. results show low sensitivity electricity price all concepts. Operating at negatively affects capacity, therefore, best suited high-temperature networks. concept PV with ASHP better densely populated regions. However, both concepts cost above 20 ct/kWh area over 120 €/m2. For ca. 19 ct/kWh, below 17

Language: Английский

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Multiscale analysis of a seasonal latent thermal energy storage with solar collectors for a single-family building

Thermal Science and Engineering Progress, Journal Year: 2024, Volume and Issue: 50, P. 102538 - 102538

Published: March 17, 2024

This paper presents a comprehensive system-to-CFD multiscale analysis of seasonal thermal energy storage (STES) system based on phase change materials (PCMs) for efficient and release space heating. The study investigates the impact various factors, including geometry individual tank thermo-fluid dynamic parameters heat transfer fluid performance. work focuses STES integration with heating to meet demands typical single-family building located in Naples – South Italy, coastline Mediterranean climate. primary goal is assess behaviour system-integrated PCM its characteristic parameters, leading proposal sustainable approaches that include renewable sources partially fulfil loads. Among Scenarios, one stands out as it achieves better operation, allowing solar collectors cover around 69.2 % winter demand, i.e., 3.06 MWh. also discusses benefits modular evidenced by Scenario 3, which allows parallel discharge multiple LHTES tanks, an enhancement efficiency compared other Scenarios. Results indicate total discharged single 56.30 kWh, latent fraction released over time 111 h average temperature difference 5.65 °C. reaches value 90.4 %, demonstrating effectiveness meeting demands.

Language: Английский

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Energy and environmental benefits of an integrated solar photovoltaic and thermal hybrid, seasonal storage and heat pump system for social housing

Applied Thermal Engineering, Journal Year: 2022, Volume and Issue: 213, P. 118662 - 118662

Published: May 21, 2022

A facility based on a photovoltaic and thermal hybrid solar field with seasonal storage tank coupled to water-to-water heat pump is presented in this paper as an adequate energy supply system for building of social homes Zaragoza (Spain), currently under construction. Two types complementary software have been used the complete design, sizing, simulation system. DesignBuilder was determine hourly demands from construction drawings, TRNSYS then implemented dynamically simulate whole System performance has tested terms 3E aspects (energy, environmental economic) few well-known key indicators. Results obtained by combined use demand quantification different indicators (KPI) show that proposed solution suitable building: calculated coverage domestic hot water about 80%, payback period 8.5 years, installation could avoid 44,200 kgCO2/year global warming potential. To sum up, shows how novel, high-efficiency heating good housing, owing its low costs possible subsidization fraction high initial investment.

Language: Английский

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Water based adsorption thermal battery: Sorption mechanisms and applications

Energy storage materials, Journal Year: 2022, Volume and Issue: 54, P. 794 - 821

Published: Nov. 14, 2022

Language: Английский

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