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Energies
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Advanced Applications of Solar and Thermal Storage Energy
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Advanced Applications of Solar and Thermal Storage Energy

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A2: Solar Energy and Photovoltaic Systems".

Deadline for manuscript submissions: 30 April 2024 | Viewed by 3716

Special Issue Editors

Prof. Dr. Chun Chang

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Guest Editor
Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
Interests: solar thermal utilization technology; advanced heat transfer and storage technology
Prof. Dr. Mingzhi Zhao

E-Mail Website
Guest Editor
College of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, China
Interests: solar energy utilization technology
Dr. Cancan Zhang

E-Mail Website
Guest Editor
Faculty of Environment and Life, Beijing University of Technology, Beijing 100044, China
Interests: thermal energy storage; heat transfer enhancement; solar energy utilization
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Jianfeng Lu

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
Interests: solar thermal utilization technology; thermal storage materials and systems

Special Issue Information

Dear Colleagues,

The energy consumption of buildings and industries is enormous, resulting in significant emissions. However, these energy consumption and pollution issues can be solved by clean energy technology. Solar energy is a key element for sustainable heating and cooling and plays an essential role in the development of a carbon-neutral building stock, thus fundamentally contributing to the achievement of climate targets. Solar thermal technology has great potential to support a carbon-neutral economy as well as contribute to energy efficiency, flexibility through thermal energy storage, and the reliability and security of the energy supply.

This Special Issue aims to present the most recent original research related to the theory, design, modeling, and application of all types of solar heating and cooling systems and thermal storage technology with the aim of meeting the increasing need for modernization and greater energy efficiency to significantly reduce CO2 emissions.

Topics of interest for publication include, but are not limited to:

  • Solar collectors;
  • Solar water heating;
  • Solar space heating and cooling;
  • Industrial process heat;
  • Solar desalination;
  • Solar thermal power;
  • Solar facility agriculture;
  • Sensible heat storage;
  • Latent heat storage;
  • Chemical energy storage;
  • Solar economic analysis;
  • Solar drying systems.

Prof. Dr. Chun Chang
Prof. Dr. Mingzhi Zhao
Prof. Dr. Cancan Zhang
Prof. Dr. Jianfeng Lu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • solar collector
  • concentrator solar power
  • solar heating and cooling
  • solar drying
  • solar desalination
  • energy storage
  • energy conversion
  • energy efficiency

Published Papers (3 papers)

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Research

26 pages, 10484 KiB  
Article
Numerical Assessment of a Two-Phase Model for Propulsive Pump Performance Prediction
by Filippo Avanzi, Alberto Baù, Francesco De Vanna and Ernesto Benini
Energies 2023, 16(18), 6592; https://doi.org/10.3390/en16186592 - 13 Sep 2023
Viewed by 812
Abstract
The present work provides a detailed numerical investigation of a turbopump for waterjet applications in cavitating conditions. In particular, the study focuses on the complexities of cavitation modelling, serving as a pivotal reference for future computational research, especially in off-design hydro-jet scenarios, and [...] Read more.
The present work provides a detailed numerical investigation of a turbopump for waterjet applications in cavitating conditions. In particular, the study focuses on the complexities of cavitation modelling, serving as a pivotal reference for future computational research, especially in off-design hydro-jet scenarios, and it aims to extend current model assessments of the existing methods, by disputing their standard formulations. Thus, a computational domain of a single rotor-stator blade passage is solved using steady-state Reynolds-Averaged Navier–Stokes equations, coupled with one-, two-, and four-equation turbulence models, and compared with available measurements, encompassing both nominal and thrust breakdown conditions. Through grid dependency analysis, a medium refinement with the Shear Stress Transport turbulence model is chosen as the optimal configuration, reducing either computational time and relative error in breakdown efficiency to 1%. This arrangement is coupled with a systematic study of the Zwart cavitation model parameters through multipliers ranging from 10−2 to 102. Results reveal that properly tuning these values allows for a more accurate reconstruction of the initial phases of cavitation up to breakdown. Notably, increasing the nucleation radius reduces the difference between the estimated head rise and experimental values near breakdown, reducing the maximum error by 4%. This variation constrains vapour concentration, promoting cavitation volume extension in the passage. A similar observation occurs when modifying the condensation coefficient, whereas altering the vaporization coefficient yields opposite effects. Full article
(This article belongs to the Special Issue Advanced Applications of Solar and Thermal Storage Energy)
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18 pages, 5298 KiB  
Article
Experimental and Numerical Study of the Ice Storage Process and Material Properties of Ice Storage Coils
by Xiaoyu Xu, Chun Chang, Xinxin Guo and Mingzhi Zhao
Energies 2023, 16(14), 5511; https://doi.org/10.3390/en16145511 - 20 Jul 2023
Cited by 1 | Viewed by 935
Abstract
The coiled ice-storage-based air conditioning system plays a significant role in enhancing grid peak regulation and improving cooling economy. This paper presents theoretical and experimental studies conducted on the ice storage process of coiled ice storage air conditioning technology. The cooling of water [...] Read more.
The coiled ice-storage-based air conditioning system plays a significant role in enhancing grid peak regulation and improving cooling economy. This paper presents theoretical and experimental studies conducted on the ice storage process of coiled ice storage air conditioning technology. The cooling of water is divided into two stages:10.0 °C to 4.0 °C and 4.0 °C to below 0.0 °C. Initially, the ice storage process forms an ice layer with a thickness of 2.50 mm on the lower surface of the coil, but eventually, the ice layer on the upper surface becomes 3.85 mm thicker than the lower surface as a result of the natural convection of water and density reversal at 4.0 °C. Furthermore, the impact of three coils with different thermal conductivity on the ice storage process was evaluated. It was observed that the thermal conductivity of R-HDPE (reinforced high-density polyethylene) was only 2.6 W/(m·K) higher than HDPE (high-density polyethylene), yet it reduced the freezing time by 34.85%, while the thermal conductivity of steel was 37.4 W/(m·K) higher than R-HDPE, but only decreased the freezing time by 9.40%. The results demonstrated that the rate of ice accumulation increased with thermal conductivity. However, when the coil material’s thermal conductivity surpassed that of ice, the further increase of thermal conductivity gradually weakened its impact on the ice storage rate. Full article
(This article belongs to the Special Issue Advanced Applications of Solar and Thermal Storage Energy)
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Graphical abstract

27 pages, 9623 KiB  
Article
Numerical Investigation of a Solar-Heating System with Solar-Tower Receiver and Seasonal Storage in Northern China: Dynamic Performance Assessment and Operation Strategy Analysis
by Xiaoxia Li, Husheng Qiu, Zhifeng Wang, Jinping Li, Guobin Yuan, Xiao Guo and Lifeng Jin
Energies 2023, 16(14), 5505; https://doi.org/10.3390/en16145505 - 20 Jul 2023
Cited by 3 | Viewed by 798
Abstract
Solar-heating technology is a promising solution to help China achieve the “3060 double carbon” target as soon as possible. Seasonal thermal storage (STS) can effectively solve the mismatch problem of solar-heating systems between the supply and demand of thermal energy. Due to the [...] Read more.
Solar-heating technology is a promising solution to help China achieve the “3060 double carbon” target as soon as possible. Seasonal thermal storage (STS) can effectively solve the mismatch problem of solar-heating systems between the supply and demand of thermal energy. Due to the instability of solar radiation resources and the heat demand, it is necessary to analyze the dynamic response characteristics and operation strategy optimization of the system in different operation stages. Yet, related studies are still scarce. The aim of this paper is to study the switching mechanism of the operation modes and the transitive relation of the system energy in different operation stages based on a pilot solar-heating system with STS in Huangdicheng, northern China. The impacts of different heating strategies on the system performance were also analyzed with a dynamic simulated method in TRNSYS. The results showed that the solar fraction of the system reached 89.4% in the third year, which was 3.6% higher than that in the first year. The quality–quantity heating operation strategies are effective ways to improve the discharge efficiency of the STS and the system performance without a heat pump. The electricity consumption of the pump on the heating side could be significantly reduced by 44.6% compared with the quality control. Ultimately, the findings in this paper are valuable for the optimization of the operation of solar-heating systems. Full article
(This article belongs to the Special Issue Advanced Applications of Solar and Thermal Storage Energy)
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