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Advanced Heat Pump Technologies for Renewable Energy Utilization

Submission Deadline: 30 September 2021 (closed)

Guest Editors

Wei Wu, City University of Hong Kong, China
Tian You, Sun Yat-sen University, China
Zongwei Han, Northeastern University, China

Summary

Heat pump technologies play a significant role in energy saving and emission mitigation. Using heat pumps for cooling and heating in buildings and industries are attracting increasing interests due to the advantages, in terms of high energy efficiency and low air pollution, over conventional systems. In addition, heat pumps are promising options for renewable energy utilization.
There are various types of heat pumps, including air-source heat pump (ASHP), ground-source heat pump (GSHP), water-source heat pump (WSHP), solar-source heat pump (SSHP). Depending on the driving power, these heat pumps can be either vapor-compression cycles or sorption cycles. All these heat pumps are potential for exploiting renewable energies, including solar energy, geothermal energy, biomass energy, ambient-air energy, etc. To facilitate effective renewable energy utilization, it is essential to promote heat pump advancement in cycle improvement, system innovation, and design optimization.
This special issue provides an academic and technical platform for worldwide researchers and engineers to exchange new ideas and solutions for better development of advanced heat pump and renewable energy. Both original research and review articles on advanced heat pump technologies are highly welcome.

Keywords

Advanced heat pump; Renewable energy; Vapor-compression cycle; Sorption cycle; Energy saving

Published Papers

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  • Open Access

    ARTICLE

    Numerical Study on Heat Transfer Characteristic of the Plate-Fin Microchannel Heat Sink for Water-Based Thermal Management of CPU Chip

    Jie-Chao Chen, Rui-Hao Luo, Wu-Zhi Yuan, Nan-Long Hong, Wen-Hao Wang
    Energy Engineering, Vol.119, No.4, pp. 1327-1339, 2022, DOI:10.32604/ee.2022.019331
    （This article belongs to this Special Issue: Advanced Heat Pump Technologies for Renewable Energy Utilization)
    Abstract For effective water-based thermal management of high heat generating CPU chip, a series of numerical simulation has been conducted to study the effects of heat flux, fin height and flow rate on convective thermal performance of the plate-fin microchannel heat sinks. The characteristics of heat transfer and flow resistance have been quantificationally discussed and JF factor is employed to evaluate the comprehensive efficiency of convective heat transfer of microchannel heat sink. Results show that the increase in fin height and flow rate of cooling water is helpful to decrease the maximum temperature of CPU chip. Large flow rate and heat… More >

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    733

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    382

  • Open Access

    ARTICLE

    Analysis of Power Quality Problems in Large-Scale Application of Air-Source Heat Pump

    Zhihao Zheng, Yanbo Che, Hailian Bi, Dan Wu, Wei He
    Energy Engineering, Vol.119, No.2, pp. 637-651, 2022, DOI:10.32604/ee.2022.016661
    （This article belongs to this Special Issue: Advanced Heat Pump Technologies for Renewable Energy Utilization)
    Abstract With the implementation of electric energy alternatives, the large-scale application of electric energy substitution represented by air-source heat pumps has replaced traditional coal-fired heating, which is beneficial for the environment and alleviates air pollution. However, the large-scale application of air-source heat pumps has brought power quality problems such as voltage sags, harmonic pollution, and three-phase imbalance to the distribution network. This paper studies the fixed-frequency and variable-frequency air-source heat pump, introduces its working principle, analyzes the mechanism of its power quality problem. Moreover, the paper establishes a simulation model for the fixed-frequency heat pump and variable-frequency heat pump to connect… More >

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    1036

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    545

  • Open Access

    ARTICLE

    Field Investigation and Comparison Analysis of Low-Grade Heat Pump Technologies in Building Space Heating Projects

    Yanxue Li, Weijun Gao, Xiaoyi Zhang, Wenya Xu, Yingjun Ruan, Yinzhong Wang
    Energy Engineering, Vol.119, No.1, pp. 63-81, 2022, DOI:10.32604/EE.2022.016209
    （This article belongs to this Special Issue: Advanced Heat Pump Technologies for Renewable Energy Utilization)
    Abstract The building sector contributes a large ratio of final energy consumption, and improving building energy efficiency is expected to play a significant role in mitigating its carbon dioxide emission. Herein, we collected the on-site measurement data to investigate the techno-economic performances of different heat pump types that exist in building space heating projects in Qingdao, China. An in-depth analysis revealed the temperature variations of measured low-grade heat sources over the whole heating supply period, and urban sewage water shows high stable heat energy quality compared with seawater and geothermal heat resources. Operational behaviors including cycling inlet and outlet temperature of… More >

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    1151

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    570

  • Open Access

    ARTICLE

    Performance Characteristics of Geothermal Single Well for Building Heating

    Jingying Li, Tiejun Zhu, Fengming Li, Dong Wang, Xianbiao Bu, Lingbao Wang
    Energy Engineering, Vol.118, No.3, pp. 517-534, 2021, DOI:10.32604/EE.2021.014464
    （This article belongs to this Special Issue: Advanced Heat Pump Technologies for Renewable Energy Utilization)
    Abstract The single well geothermal heating (SWGH) technology has attracted extensive attention. To enhance heat extraction from SWGH, a mathematical model describing heat transfer is set up, and the key influence factor and heat transfer enhancement method are discussed by thermal resistance analysis. The numerical results show that the thermal resistance of rock is far greater than that of well wall and fluid. So, reducing rock thermal resistance is the most effective method for enhancing the heat extraction power. For geothermal well planning to drill: rock thermal resistance can be reduced by increasing well diameter and rock thermal conductivity; the temperature… More >

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    1409

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    873

  • Open Access

    ARTICLE

    Analysis of Solar Direct-Driven Organic Rankine Cycle Powered Vapor Compression Cooling System Combined with Electric Motor for Office Building Air-Conditioning

    Xiang Xiao, Wei Zhao, Wei Wang, Wei Zhang, Xianbiao Bu, Lingbao Wang, Huashan Li
    Energy Engineering, Vol.118, No.1, pp. 89-101, 2021, DOI:10.32604/EE.2020.014016
    （This article belongs to this Special Issue: Advanced Heat Pump Technologies for Renewable Energy Utilization)
    Abstract Solar energy powered organic Rankine cycle vapor compression cycle (ORC-VCC) is a good alternative to convert solar heat into a cooling effect. In this study, an ORC-VCC system driven by solar energy combined with electric motor is proposed to ensure smooth operation under the conditions that solar radiation is unstable and discontinuous, and an office building located in Guangzhou, China is selected as a case study. The results show that beam solar radiation and generation temperature have considerable effects on the system performance. There is an optimal generation temperature at which the system achieves optimum performance. Also, as a key… More >

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    1888

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    1211

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