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Optimization and Integrated Design of Sustainable and Renewable Energy Systems

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A: Sustainable Energy".

Deadline for manuscript submissions: 5 November 2025 | Viewed by 784

Special Issue Editor


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Guest Editor
Guangzhou Institute of Energy Research, Chinese Academy of Sciences, Guangzhou 510640, China
Interests: heating, ventilation and air conditioning; energy storage; sustainable buildings; solar energy; integrated energy systems; design optimization; energy management
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In the context of the rapid growth of energy demand, global warming and environmental deterioration, the adoption of sustainable and renewable sources of energy has been widely recognized as an approach that is necessary if we are to reform the energy structure of human society towards a decarbonized future. In recent decades, much effort has invested into the development and deployment of various sustainable and renewable energy technologies; however, due to the inherent features of renewable energy, such as intermittence, low density, fluctuation, etc., stand-alone applications of sustainable and renewable energy technology tend to fail to provid reliable and applicable clean energy solutions. The variations in and multiplicity of demand from the user side also pose further difficulties in the application of sustainable and renewable energy technologies. The optimization and integrated design of sustainable and renewable energy systems, in a way that takes into consideration the harmonization of energy supply and demand, therefore play significant roles in the rationalization renewable energy utilization with high levels of reliability, efficiency and resilience.

This Special Issue aims to gather together original research and review articles regarding the optimal integration and coupling of sustainable and renewable energy systems, thereby providing a communication platform for the latest technology advancements, in-depth mechanisms, and future research directions in this sector.

Topics within the scope of this Special Issue include but are not limited to the following:

  • Integrated renewable energy systems;
  • Multiple energy complementary;
  • Integrative energy networks;
  • Design optimization and system integration;
  • Control optimization and optimal energy dispatching;
  • Applications and field tests;
  • Energy flexibility and demand-side management;
  • Intelligent and data-driven energy management strategies;
  • Energy or exergy flow analysis;
  • Life cycle analysis or economic assessment;
  • Environmental benefit evaluation and carbon footprint analysis.

Prof. Dr. Wenye Lin
Guest Editor

Manuscript Submission Information

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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

  • integrated energy systems
  • energy management
  • energy flexibility
  • multiple energy complementary
  • design optimization
  • optimal energy dispatching
  • renewable energy

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Published Papers (1 paper)

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Research

23 pages, 3591 KB  
Article
Identification of Key Parameters and Construction of Empirical Formulas for Isentropic and Volumetric Efficiency of High-Temperature Heat Pumps Based on XGBoost-MLR Algorithm
by Shuaiqi Li, Fengming Wu, Wenye Lin, Wenji Song and Ziping Feng
Energies 2025, 18(16), 4454; https://doi.org/10.3390/en18164454 - 21 Aug 2025
Viewed by 511
Abstract
High-temperature heat pumps (HTHPs) have gradually begun to play an essential role in using heat in industry for waste heat recovery and providing higher-grade heat. The isentropic efficiency and volumetric efficiency of HTHPs are significantly affected by high-temperature operating conditions, which take the [...] Read more.
High-temperature heat pumps (HTHPs) have gradually begun to play an essential role in using heat in industry for waste heat recovery and providing higher-grade heat. The isentropic efficiency and volumetric efficiency of HTHPs are significantly affected by high-temperature operating conditions, which take the pressure ratio (PR) as the key parameter, with limited consideration of other factors such as temperature. Relying on the experimental data obtained from the industrial-grade HTHP system experimental platform, this work proposed an XGBoost-MLR algorithm-based method to identify the key parameters of HTHP isentropic efficiency and volumetric efficiency. High-precision (R2 > 0.95) prediction models were established to determine the effect of temperature variables on isentropic efficiency and volumetric efficiency. After the key parameters were identified, the empirical equation of isentropic efficiency and volumetric efficiency applicable to this operation condition were constructed. The average relative errors of the two empirical formulas were 5.95% and 5.28%, respectively. Finally, the generalizability of empirical formulas was verified using experimental data from other researchers. The isentropic empirical formula had a relative deviation of less than 10% under twin-screw compressor conditions. However, the applicability of the volumetric efficiency empirical formula was unstable in compressors of different sizes. The feasibility of the method was also discussed. Full article
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