Photovoltaic-driven liquid air energy storage system for combined cooling, heating and power towards zero-energy buildings

Chen, Xiaoyuan; Chen, Yu; Fu, Lin; Zhang, Zhiying; Tang, Miangang; Feng, Juan; Jiang, Shan; Lei, Yi; Zhang, Donghui; Shen, Boyang

doi:10.1016/j.enconman.2023.117959

Cited by 28 publications

(1 citation statement)

References 62 publications

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“…In particular, the superconducting magnet and the H-bridge converter are installed together in the same container and operate in a cryogenic environment (≤77 K). Based on previous work [39,40], the operating losses of power switches can be significantly reduced in cryogenic environments, and the lowtemperature conditions can greatly enhance their overcurrent tolerance, which has already been applied in various fields such as electric aircraft and liquid air storage [41,42].…”

Section: Topology and Operating Principlementioning

confidence: 99%

Multifunctional Superconducting Magnetic Energy Compensation for the Traction Power System of High-Speed Maglevs

Fu,

Chen,

Zhang

et al. 2024

Electronics

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With the global trend of carbon reduction, high-speed maglevs are going to use a large percentage of the electricity generated from renewable energy. However, the fluctuating characteristics of renewable energy can cause voltage disturbance in the traction power system, but high-speed maglevs have high requirements for power quality. This paper presents a novel scheme of a high-speed maglev power system using superconducting magnetic energy storage (SMES) and distributed renewable energy. It aims to solve the voltage sag caused by renewable energy and achieve smooth power interaction between the traction power system and maglevs. The working principle of the SMES power compensation system for topology and the control strategy were analyzed. A maglev train traction power supply model was established, and the results show that SMES effectively alleviated voltage sag, responded rapidly to the power demand during maglev acceleration and braking, and maintained voltage stability. In our case study of a 10 MW high-speed maglev traction power system, the SMES system could output/absorb power to compensate for sudden changes within 10 ms, stabilizing the DC bus voltage with fluctuations of less than 0.8%. Overall, the novel SMES power compensation system is expected to become a promising solution for high-speed maglevs to overcome the power quality issues from renewable energy.

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Section: Topology and Operating Principlementioning

confidence: 99%

Multifunctional Superconducting Magnetic Energy Compensation for the Traction Power System of High-Speed Maglevs

Fu,

Chen,

Zhang

et al. 2024

Electronics

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Design and performance analysis of portable solar powered cooler for vaccine storage

Marwa,

Kivevele,

Kichonge

et al. 2024

Energy Science & Engineering

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The efficacy of vaccine storage is significantly impacted by temperature fluctuations within the cooler, often exacerbated by using phase change materials in existing cooler designs for remote areas. These materials can undergo uneven melting and phase separation, leading to temperature instability and vaccine potency loss. In response to this challenge, the present study introduces a novel design of a portable, locally‐made solar‐powered cooler optimized for longer storage periods. The cooler's performance in terms of temperature distribution, airflow dynamics, and the coefficient of performance (COP) is meticulously examined through computational fluid dynamics (CFD) simulations. The simulated results were validated using experimental data from the open literature, ensuring accuracy and reliability. The findings indicate that the developed cooler achieves significant improvements over traditional models. For instance, the current model reaches a temperature of +12°C in just 84 min, compared to 208 min, as reported in the literature results. Moreover, the current model reaches a temperature of −12°C in 195 min and it has energy efficient with a COP of 4.5. Statistical analysis further confirms the reliability of the simulation results, with root mean square and mean absolute percentage errors of 6.587 and 24.2%, respectively. Additionally, a comparative study of five insulative materials highlights polyurethane (Po) as the top performer, with a heat transfer performance of 14.3%, followed by feather fiber (Fe) (18.7%), fly ash (Fl) (19.8%), fiberglass (Fi) (21.9%), and coconut fiber (Co) (25.9%). Notably, net present value (NPV) of $689.336 and $448.01 was obtained for economic analysis of the current model over the existing model, showing the feasibility of the study. Hence, the cooler's effectiveness in storing vaccines in isolated regions exceeds that of conventional models, providing a hopeful solution to tackle vital challenges in vaccine distribution and preservation.

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Systematic review of solar techniques in zero energy buildings

Senyonyi,

Mahmoud,

Hassan

2024

Clean Techn Environ Policy

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Photovoltaic-driven liquid air energy storage system for combined cooling, heating and power towards zero-energy buildings

Cited by 28 publications

References 62 publications

Multifunctional Superconducting Magnetic Energy Compensation for the Traction Power System of High-Speed Maglevs

Multifunctional Superconducting Magnetic Energy Compensation for the Traction Power System of High-Speed Maglevs

Design and performance analysis of portable solar powered cooler for vaccine storage

Systematic review of solar techniques in zero energy buildings

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