Special Issue "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


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.

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

Published Papers

  • Analysis of Power Quality Problems in Large-Scale Application of Air-Source Heat Pump
  • 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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  • Field Investigation and Comparison Analysis of Low-Grade Heat Pump Technologies in Building Space Heating Projects
  • 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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  • Performance Characteristics of Geothermal Single Well for Building Heating
  • 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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