Dynamic optimization for minimal HVAC demand with latent heat storage, heat recovery, natural ventilation, and solar shadings

Passos, L.A. de Araujo; Engel, P; Baldi, Simone; Schutter, Bart De

doi:10.1016/j.enconman.2022.116573

Cited by 33 publications

(8 citation statements)

References 47 publications

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“…In contrast, research 10 has indicated that the thermal conductivity of the heat exchanger material has minimal impact on the rate at which PCM melts. 11 At the Green Village in Delft, Netherlands, featuring all-glass facades, solar shades, sky windows, a climate tower with PCM, a heat recovery unit, and a heat pump. Using transient modelling and nonlinear optimization, the study aims to enhance longterm energy efficiency, achieving a 10.6% reduction in yearly heat demand.…”

Section: Literature Surveymentioning

confidence: 99%

“…Moreover, recent findings 9 suggest that PCM‐equipped flat plate collectors can extend the delivery time of hot water in the morning while maintaining lower output temperatures, showcasing their enhanced efficiency. In contrast, research 10 has indicated that the thermal conductivity of the heat exchanger material has minimal impact on the rate at which PCM melts 11 . At the Green Village in Delft, Netherlands, featuring all‐glass facades, solar shades, sky windows, a climate tower with PCM, a heat recovery unit, and a heat pump.…”

Section: Introductionmentioning

confidence: 99%

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Performance analysis of solar immersion heater with phase change material

Vichare,

Nene,

Utage

2024

Energy Storage

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Thermal energy storage (TES) systems have emerged as a vital solution for addressing the gap between energy supply and demand. While research on solar energy storage has primarily focused on flat‐plate collectors, limited work has been done to explore the potential of Scheffler solar concentrators. This study proposes an innovative approach to thermal energy storage using a Scheffler solar concentrator and phase change material (PCM) to address the energy needs of rural areas with limited access to electricity. Real‐time design and testing were conducted using paraffin wax as the PCM, and computational fluid dynamics (CFD) analysis was performed using the ANSYS Fluent software to determine the optimal charging and discharging times. The results indicated that the required charging time was 17 min according to the CFD analysis, while the experimental results yielded a charging time of 18 min. The results demonstrated that the proposed approach is a feasible and effective solution for meeting the energy demands of rural communities. The charging time was optimized using the response surface method, yielding an optimal charging time of 20.5 min and an optimal discharging time of 26.2 min. Overall, these findings highlight the potential of utilizing Scheffler solar concentrators and PCMs for sustainable and reliable thermal energy storage.

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Section: Literature Surveymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance analysis of solar immersion heater with phase change material

Vichare,

Nene,

Utage

2024

Energy Storage

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“…The use of PCM as thermal energy storage (TES) has been widely applied in various fields, such as cold chain logistics, 25,26 electric energy storage, 27,28 photovoltaic energy production, 29 HVAC systems 30 as well as in other sectors of the building industry. 31,32 The use of TES is intended to save energy and release it when needed.…”

Section: Phase Change Materialsmentioning

confidence: 99%

Bio‐based building components: A newly sustainable solution for traditional walls made of Arundo donax and gypsum

et al. 2023

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To contribute to the use of bio‐based materials in the building sector, a novel bio‐based wall panel, with a high thermal performance level, is proposed in this work. The panel is based on an ancient rural technique, widely diffused in southern Italy, which makes use of Arundo donax L. canes combined with gypsum plaster to build walls and ceilings of rural buildings. The enhancement of the thermal capacity of these panels by means of the introduction in the canes of a natural wax oleogel (WO) is proposed in this paper. A specific experimental campaign aiming at the comparison of traditional and innovative panels was carried out to assess the enhanced thermal performance of the proposed solution. The maximum value of heat flow absorbed from the panel with WO was 61.08 W/m2 around a mean panel temperature of 24°C, corresponding to the melting temperature range of the WO. The panel without WO at the same temperature absorbed an incoming heat flow of 34.64 W/m2 which is about 57% of the panel with WO. The panel with WO released at a temperature of about 27.5°C, a heat flow of 43.42 W/m2. At the same temperature of about 27.5°C, the panel without WO released a heat flow of 34.38 W/m2 which is about 80% that of the panel with WO. The results highlighted that the addition of natural WO has enhanced the thermal capacity of the panel facilitating heat dissipation through the borders. These characteristics make the panel a suitable component for internal partitions of controlled temperature zones such as residential rooms, storage food areas, livestock buildings, and where it is necessary to obtain a constant environmental temperature. In particular, the null or low toxicity of the panel's materials allows for partition use, also in hygienically safe environments.

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“…The authors in [22] highlight the use of HVAC systems to deliver ancillary services, which are critical for maintaining a continuous balance between power demand and supply of the grid. Furthermore, the authors in [23] demonstrate that using a central control system to coordinate different technology combinations can potentially improve energy utilization efficiency. In each of these systems, the key feature is the presence of an intelligent controller for localized energy management, much like the controller proposed in this paper.…”

Section: Comparable Energy Systemsmentioning

confidence: 99%

Balancing of Low-Voltage Supply Network with a Smart Utility Controller Leveraging Distributed Customer Energy Sources

Mtolo,

Dorrell,

Pillay Carpanen

2023

Energies

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In South Africa, there has been a rapid adoption of solar power, particularly inverter-based solar sources, in low-voltage (LV) networks due to factors such as load shedding, rising electricity costs and greenhouse gas emissions reduction. In residential LV networks, the alignment between solar supply and energy demand is less precise, necessitating larger battery storage systems to effectively utilize solar energy. Residential areas experience peak energy demand in the morning and evening when solar irradiance is limited. As a result, substantial energy storage is important to fully utilize the potential of solar energy. However, increasing inverter-based, customer-generated power creates an imbalance in the utility supply. This is because utility LV supply transformers have three phases, while individual customers have single-phase connections and no load balancing control mechanism. This supply imbalance adversely affects the overall power quality, causing energy losses, damage to devices and other issues. To address these problems, the paper proposes a smart control approach to minimize power imbalances within utility LV supply transformers. The controller uses customer battery storage in residential areas to balance the utility transformer phases. A laboratory model was built to simulate a three-phase low-voltage network with single-phase customers, both with and without a smart controller. The results show that closely monitoring and controlling individual inverters through a central controller can significantly improve the balance of the supply network.

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Dynamic optimization for minimal HVAC demand with latent heat storage, heat recovery, natural ventilation, and solar shadings

Cited by 33 publications

References 47 publications

Performance analysis of solar immersion heater with phase change material

Performance analysis of solar immersion heater with phase change material

Bio‐based building components: A newly sustainable solution for traditional walls made of Arundo donax and gypsum

Balancing of Low-Voltage Supply Network with a Smart Utility Controller Leveraging Distributed Customer Energy Sources

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