Performance Analysis and Design Optimization of Renewable Energy Heating Systems

A special issue of Buildings (ISSN 2075-5309). This special issue belongs to the section "Building Energy, Physics, Environment, and Systems".

Deadline for manuscript submissions: 30 July 2025 | Viewed by 1062

Special Issue Editors


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Guest Editor
School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi'an 712000, China
Interests: geothermal energy utilization; borehole heat exchanger system; building energy conservation

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Guest Editor
Faculty of Geosciences, Geoengineering and Mining, Technische Universität Bergakademie Freiberg, 09599 Freiberg, Germany
Interests: THM coupling simulation; geothermal utilization; geotechnical system analysis

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Guest Editor
School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Interests: zero-carbon buildings; energy saving and utilization of renewable energy in buildings

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Guest Editor
School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 611756, China
Interests: underground temperature and humidity environment; renewable energy utilization and storage technology

Special Issue Information

Dear Colleagues,

Performance analysis and design optimization of renewable energy heating systems is an essential area of study focusing on enhancing the efficiency and sustainability of heating solutions that utilize renewable energy sources. This field involves evaluating influences under different system parameters on several aspects, such as thermal performance, power consumption, economic performance, and environmental impact. By conducting comprehensive analyses, researchers can identify optimal configurations and operational strategies that maximize energy efficiency while minimizing carbon footprints.

The core objective of this Special Issue is to develop and refine calculation models and simulation tools used to predict system performance under varying conditions. These models help understand the complex interactions between system components and the environment. Advanced techniques, including algorithmic adjustments and machine learning approaches, are employed to optimize system designs, ensuring that they not only meet energy demands efficiently but also adhere to strict environmental regulations. Additionally, this Special Issue often encompasses experimental studies concerning the integration of hybrid systems, which combine multiple renewable sources such as solar thermal, geothermal, hydrogen, biomass energy, etc.

Overall, the performance analysis and design optimization of renewable energy heating systems are pivotal for advancing green technology in residential, commercial, and industrial sectors, aligning with global efforts to mitigate climate change. The topics of this Special Issue include, but are not limited to, the following:

  • Renewable energy utilization;
  • Solar PV system;
  • Geothermal system;
  • Hydrogen system;
  • Hybrid energy system;
  • Long-term simulation;
  • In situ monitoring;
  • Multi-object optimization.

Dr. Wanlong Cai
Dr. Chaofan Chen
Dr. Jiewen Deng
Dr. Chao Zeng
Guest Editors

Manuscript Submission Information

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Keywords

  • renewable energy utilization
  • solar PV system
  • geothermal system
  • hydrogen system
  • hybrid energy system
  • long-term simulation
  • in situ monitoring
  • multi-object optimization

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Published Papers (1 paper)

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Research

22 pages, 6578 KiB  
Article
Investigating the Impact of Seasonal Heat Storage on the Thermal and Economic Performance of a Deep Borehole Heat Exchanger: A Numerical Simulation Study
by Boyan Meng, Yang Zhou, Wenwen Chen, Wenxing Luo, Rui Ding, Wanlong Cai and Chaofan Chen
Buildings 2025, 15(9), 1575; https://doi.org/10.3390/buildings15091575 - 7 May 2025
Viewed by 191
Abstract
Deep borehole heat exchanger (DBHE) is a clean and efficient technology that utilizes geothermal energy for building heating. However, continuous heat extraction from a DBHE system can lead to its performance decline over time. In this paper, the seasonal heat extraction and storage [...] Read more.
Deep borehole heat exchanger (DBHE) is a clean and efficient technology that utilizes geothermal energy for building heating. However, continuous heat extraction from a DBHE system can lead to its performance decline over time. In this paper, the seasonal heat extraction and storage of a DBHE were simulated to assess the impact of seasonal heat storage schemes on its thermal and economic performance. The numerical model was constructed based on real project parameters and validated using monitoring data. Simulation results indicate that the extracted heat after storage increases linearly with the injected heat, enabling a straightforward estimation of the storage input to mitigate short-term thermal attenuation of DBHEs under varying storage durations. However, when the same amount of heat was injected annually, DBHE heat extraction still exhibited a declining trend from the third year, suggesting that short-term improvements in heat extraction could not be sustained in the long term. Furthermore, heat storage efficiency improves over time as the surrounding borehole temperature gradually increases, reaching more than 27% after 10 years for all storage scenarios. For the first time, an economic analysis was conducted for DBHE heat storage, revealing that when a solar supplemental heat system is applied, the levelized cost of heat (LCOH) is slightly higher than the base case without storage, except in cases where solar collector costs are excluded. Given the modest thermal and economic improvements, seasonal heat storage is recommended for DBHEs, especially when low-cost surplus heat is readily available. Full article
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