Dr. Wei WU

Education
PhD, Tsinghua University
Staff title
Assistant Professor

Dr. Wei Wu received his Bachelor’s degree from the Department of Building Environment and Energy Engineering at Huazhong University of Science and Technology in 2010. He obtained his PhD degree from the Department of Building Science at Tsinghua University in 2016. He was formerly a visiting scholar of the Center for Environmental Energy Engineering at University of Maryland in 2013. Since 2016, he served as a guest researcher in the Energy and Environment Division at the National Institute of Standards and Technology. He joined the City University of Hong Kong as an assistant professor in the School of Energy and Environment in July 2018.

Dr. Wu’s research is focused on building energy and sustainability technologies (BEST) towards carbon neutrality, including advanced heat pumps, novel working fluids, thermal energy storage, advanced thermal management, renewable energy utilization, etc. He has obtained/filed 18 patents, and he published a Springer book titled “Absorption Heating Technologies: Efficient Heating, Heat Recovery and Renewable Energy”. Dr. Wu is among the Top 2% Most Highly Cited Scientists Worldwide by Stanford University. He received the Willis H. Carrier Young Researcher Award of the International Institute of Refrigeration (IIR), the Distinguished Associate Award of the National Institute of Standards and Technology (NIST), the Excellent Young Scholar Award of Energy and Built Environment, and the Academic New Talent of Tsinghua University.

Other Information

Research Interests:

  • Advanced heat pumps: Absorption heat pump; Thermal heating/cooling; Renewable energy; Waste heat; Hybrid absorption-compression; Flexible heat pump; Air/ground source; Membrane-based; Microchannel; Compactness; Absorber/desorber; Heat/mass transfer; HVAC/building energy efficiency.
  • Novel working fluids: Absorption working pair; Ionic liquid; Natural refrigerant; Low-GWP refrigerant; Carbon dioxide; Fluid property; Machining learning screening; Molecular design; Deep eutectic solvent; Carbon quantum dot; Thermal conductivity enhancement.
  • Thermal energy storage: Absorption thermal battery; Energy storage cycle; Energy storage fluid; Energy storage efficiency; Energy storage density; Low-temperature charging; Discharging regulation; Supply-demand matching.
  • Advanced thermal management: Moisture desorption-absorption; High-flux passive cooling; PV thermal management; Electronics thermal management; Battery thermal management; Ambient energy harvesting; Energy-water-environment nexus.

Position(s) available

Postdoctoral Fellows / Graduate Students / Research Assistants

  • Duties
    Conducting modeling and experimental research work on the topics of advanced heat pumps, novel working fluids, thermal energy storage, advanced thermal management, renewable energy utilization, etc.
  • Requirements
    Effective writing and oral communication skills in English are essential. Postdoctoral Fellow applicants must have a PhD degree in Energy Engineering, Building Science, Refrigeration, Thermodynamics, Heat Transfer, Energy Materials, or related fields. Graduate Student applicants must have a Master’s or Bachelor’s degree in Energy Engineering, Building Science, Refrigeration, Thermodynamics, Heat Transfer, Energy Materials, or a related field. Excellent undergraduate students are considered for Research Assistants. Candidates with solid modeling skills and rich experimental experiences are preferred.
  • Application
    Please send the CV and supported documents to Dr. Wu at weiwu53@cityu.edu.hk. Review of applications will begin immediately, and applications will be accepted until the position is filled. Successful applicants will receive competitive salary and benefits, commensurate with qualifications and experiences. Opportunities to attend conferences to present their research and interact with fellow researchers will also be offered. For more information, please email Dr. Wu. Only short-listed candidates will be contacted.

City University of Hong Kong is an equal opportunity employer and we are committed to the principle of diversity. We encourage applications from all qualified candidates, especially applicants who will enhance the diversity of our staff.

Selected Awards

  • Top 2% Most Highly Cited Scientists Worldwide by Stanford University, 2021.
  • The HKIE (The Hong Kong Institution of Engineers) Best Transactions Paper Prize, 2021.
  • The HKIE (The Hong Kong Institution of Engineers) Environmental Paper Award, 2021.
  • Willis H. Carrier Young Researcher Awards, International Institute of Refrigeration (IIR), 2019 (Highest award in HVAC&R area, 8 awardees from all over the world every 4 years).
  • Distinguished Associate Award, National Institute of Standards and Technology (NIST), 2019.
  • Excellent Young Scholar Award of Energy and Built Environment, 2019 (3 awardees from all over the world every 2 years).
  • The Special Postgraduate Scholarship of Tsinghua University, 2015 (Highest honor for Tsinghua graduate students, 10 each year).
  • The Academic New Talent of Tsinghua University, 2014 (Highest honor for Tsinghua student researchers, 10 each year).
  • The XiaAnshi Scholarship, 2015 (4 graduates majored in HVAC&R in China).
  • The Excellent Paper Award of Chinese Association of Refrigeration, 2015.
  • The Excellent Paper Award of Beijing Association of Refrigeration, 2012.

Selected Publications

Book
  1. Wei Wu*, Xianting Li, Tian You. Absorption Heating Technologies: Efficient Heating, Heat Recovery and Renewable Energy. Springer Nature, 2020.
Journal papers (first/corresponding author)
  1. Zhixiong Ding, Wei Wu*. Type II absorption thermal battery for temperature upgrading: Energy storage heat transformer. Applied Energy, 2022, 324: 119748.
  2. Zhixiong Ding, Wei Wu*, Michael Leung. On the rational development of advanced thermochemical thermal batteries for short-term and long-term energy storage. Renewable and Sustainable Energy Reviews, 2022, 164: 112557.
  3. Fuxiang Li, Wei Wu*. Coupled electrical-thermal performance estimation of photovoltaic devices: A transient multiphysics framework with robust parameter extraction and 3-D thermal analysis. Applied Energy, 2022, 319: 119249.
  4. Chong Zhai, Wei Wu*. Experimental evaluation on heat/mass transfer and pressure drop of a microchannel membrane-based desorber for compact and efficient H2O/LiBr absorption refrigeration. International Journal of Heat and Mass Transfer, 2022, 195: 123198.
  5. Chong Zhai, Wei Wu*. Experimental study on heat/mass transfer and pressure drop of plate heat exchanger desorber for compact and efficient absorption cooling. International Journal of Refrigeration, 2022, online.
  6. Yunren Sui, Chong Zhai, Wei Wu*, Michael Leung. Multi-scale Computer-aided molecular design of Ionic liquid for absorption heat transformer based on Machine learning. Energy Conversion and Management, 2022, 261: 115617.
  7. Zhixiong Ding, Wei Wu*. A novel double-effect compression-assisted absorption thermal battery with high storage performance for thermal energy storage. Renewable Energy, 2022, 191: 902-918.
  8. Zengguang Sui, Chong Zhai, Wei Wu*. Parametric and comparative study on enhanced microchannel membrane-based absorber structures for compact absorption refrigeration. Renewable Energy, 2022, 187: 109-122.
  9. Zengguang Sui, Yunren Sui, Wei Wu*. Multi-objective optimization of a microchannel membrane-based absorber with inclined grooves based on CFD and machine learning. Energy, 2022, 240: 122809.
  10. Qingmei Wen, Gang Liu, Wei Wu*, Shengming Liao*. Performance evaluation of distributed energy system integrating photovoltaic, ground source heat pump, and natural gas-based CCHP. Energy Conversion and Management, 2022, 252: 115039.
  11. Chong Zhai, Wei Wu*. Energetic, exergetic, economic, and environmental analysis of microchannel membrane-based absorption refrigeration system driven by various energy sources. Energy, 2022, 239: 122193.
  12. Wei Wu*, Chong Zhai, Si-Min Huang*, Yunren Sui, Zengguang Sui, Zhixiong Ding. A hybrid H2O/IL absorption and CO2 compression air-source heat pump for ultra-low ambient temperatures. Energy, 2022, 239: 122180.
  13. Zhixiong Ding, Xiaojun Yu, Zhenxi Ma, Wei Wu*, Lin Zhang*, Y. W. Denis, Don HK Cheng. On-site measurement and simulation investigation on condensation dehumidification and desiccant dehumidification in Hong Kong. Energy and Buildings, 2022, 254: 111560.
  14. Zhixiong Ding, Wei Wu*. Dynamic discharging characteristics of absorption thermal battery under different capacity regulation strategies. Energy and Built Environment, 2022, online)
  15. Wei Wu*, Harrison M. Skye*, John J. Dyreby. Modeling and Experiments for a CO2 Ground-Source Heat Pump with Subcritical and Transcritical Operation. Energy Conversion and Management, 2021, 243: 114420.
  16. Wei Wu*, Chong Zhai, Zengguang Sui, Yunren Sui, Xianglong Luo. Proton exchange membrane fuel cell integrated with microchannel membrane-based absorption cooling for hydrogen vehicles. Renewable Energy, 2021, 178: 560-573.
  17. Zengguang Sui, Chong Zhai, Wei Wu*. Swirling flow for performance improvement of a microchannel membrane-based absorber with discrete inclined grooves. International Journal of Refrigeration, 2021, 130: 382-391.
  18. Chong Zhai, Wei Wu*, Alberto Coronas. Membrane-based absorption cooling and heating: Development and perspectives. Renewable Energy, 2021, 177: 663-688.
  19. Zhixiong Ding, Wei Wu*, Michael Leung. Advanced/hybrid thermal energy storage technology: material, cycle, system and perspective. Renewable and Sustainable Energy Reviews, 2021, 145: 111088.
  20. Chong Zhai, Wei Wu*. Performance optimization and comparison towards compact and efficient absorption refrigeration system with conventional and emerging absorbers/desorbers. Energy, 2021, 229: 120669.
  21. Chong Zhai, Yunren Sui, Zengguang Sui, Wei Wu*. Ionic liquids for microchannel membrane-based absorption heat pumps: Performance comparison and geometry optimization. Energy Conversion and Management, 2021, 239: 114213.
  22. Wei Wu*, Skye Harrison*. Residential net-zero energy buildings: Review and perspective. Renewable and Sustainable Energy Reviews, 2021, 142: 110859.
  23. Wei Wu*, Chong Zhai, Yunren Sui, Houcheng Zhang. A novel distributed energy system using high-temperature proton exchange membrane fuel cell integrated with hybrid-energy heat pump. Energy Conversion and Management, 2021, 235: 113990.
  24. Zhixiong Ding, Wei Wu*. A hybrid compression-assisted absorption thermal battery with high energy storage density/efficiency and low charging temperature. Applied Energy, 2021, 282: 116068.
  25. Wei Wu*, Zhixiong Ding, Yunren Sui, Michael Leung. Comparative dynamic performance of hybrid absorption thermal batteries using H2O/1, 3-dimethylimidazolium dimethylphosphate. Energy Conversion and Management, 2021, 228: 113690.
  26. Qingmei Wen, Gang Liu, Wei Wu*, Shengming Liao*. Multicriteria comprehensive evaluation framework for industrial park-level distributed energy system considering weights uncertainties. Journal of Cleaner Production, 2021, 282: 124530.
  27. Chong Zhai, Zengguang Sui, Wei Wu*. Geometry optimization of plate heat exchangers as absorbers in compact absorption refrigeration systems using H2O/ionic liquids. Applied Thermal Engineering, 2021, 186: 116554.
  28. Zengguang Sui, Wei Wu*, Tian You, Zhanying Zheng, Michael Leung. Performance investigation and enhancement of membrane-contactor microchannel absorber towards compact absorption cooling. International Journal of Heat and Mass Transfer, 2021, 169: 120978.
  29. Chong Zhai, Wei Wu*. Heat and mass transfer performance comparison of various absorbers/desorbers towards compact and efficient absorption heat pumps. International Journal of Refrigeration, 2021, 127: 203-220.
  30. Qingmei Wen, Gang Liu, Wei Wu*, Shengming Liao*. Genetic algorithm-based operation strategy optimization and multi-criteria evaluation of distributed energy system for commercial buildings. Energy Conversion and Management, 2020, 226: 113529.
  31. Wei Wu*, Michael Leung. Transient and seasonal performance evaluation of a novel flexible heat pump for solar cooling. Energy Conversion and Management, 2020, 223: 113269.
  32. Zhixiong Ding, Wei Wu*, Youming Chen, Yantong Li. Dynamic simulation and parametric study of solar water heating system with phase change materials in different climate zones. Solar Energy, 2020, 205: 399-408.
  33. Xuyang Zhong, Zhiang Zhang, Wei Wu*, Ian Ridley. Comprehensive evaluation of energy and indoor-PM2.5-exposure performance of residential window and roller blind control strategies. Energy and Buildings, 2020, 223: 110206.
  34. Wei Wu*, Michael Leung. A novel hybrid-energy heat pump with refrigerant injection: Performance characterization and injection optimization. Energy Conversion and Management, 2020, 208: 112584.
  35. Zhixiong Ding, Wei Wu*, Youming Chen, Michael Leung. Dynamic characteristics and performance improvement of a high-efficiency double-effect thermal battery for cooling and heating. Applied Energy, 2020, 264: 114768.
  36. Zhenxi Ma, Fengguo Liu*, Changfei Tian, Leilei Jia, Wei Wu*. Experimental comparisons on a gas engine heat pump using R134a and low-GWP refrigerant R152a. International Journal of Refrigeration, 2020, 115: 73–82.
  37. Xuyang Zhong, Wei Wu*, Ian A. Ridley. Assessing the energy and indoor-PM2.5-exposure impacts of control strategies for residential energy recovery ventilators. Journal of Building Engineering, 2020, 29: 101137.
  38. Wei Wu*, Michael Leung, Zhixiong Dinga, Hongyu Huang, Yu Bai*, Lisheng Deng. Comparative analysis of conventional and low-GWP refrigerants with ionic liquid used for compression-assisted absorption cooling cycles. Applied Thermal Engineering, 2020, 172: 115145.
  39. Wei Wu*, Tian You, Michael Leung. Screening of novel water/ionic liquid working fluids for absorption thermal energy storage in cooling systems. International Journal of Energy Research, 2020, 4(12): 9367-9381.
  40. Wei Wu*. Low-temperature compression-assisted absorption thermal energy storage using ionic liquids. Energy and Built Environment, 2020, 1(2): 139-148.
  41. Wei Wu*, Yu Bai, Hongyu Huang, Zhixiong Ding, Lisheng Deng. Charging and Discharging Characteristics of Absorption Thermal Energy Storage using Ionic-liquid-based Working Fluids. Energy, 2019, 189: 116126.
  42. Wei Wu*, Tian You, Xianting Li. Performance Comparisons of NH3/Ionic Liquid Absorption-Compression Heat Pump for Increasing the Utilization of Geothermal Energy. International Journal of Refrigeration, 2019, 104: 19-33.
  43. Wei Wu*, Baolong Wang, Tian You, Jian Wang, Wenxing Shi, Xianting Li*. Compression-assisted absorption cycles using ammonia and various ionic liquids for cleaner heating. Journal of Cleaner Production, 2018, 195: 890-907.
  44. Wei Wu*, Tian You, Jian Wang, Baolong Wang, Wenxing Shi, Xianting Li*. A novel internally hybrid absorption-compression heat pump for performance improvement. Energy Conversion and Management, 2018, 168: 237-251.
  45. Wei Wu*, Baolong Wang, Tian You, Wenxing Shi, Xianting Li*. Configurations of solar air source absorption heat pump and comparisons with conventional solar heating. Applied Thermal Engineering, 2018, 141: 630-641.
  46. Wei Wu*, Tian You, Haiyang Zhang, Xianting Li*. Comparisons of Different Ionic Liquids Combined with Trans-1,3,3,3-tetrafluoropropene (R1234ze(E)) as Absorption Working Fluids. International Journal of Refrigeration, 2018, 88: 45-57.
  47. Wei Wu, Harrison M. Skye*. Net-zero nation: HVAC and PV systems for residential net-zero energy buildings across the United States. Energy Conversion and Management, 2018, 177: 605-628.
  48. Wei Wu, Harrison M. Skye*. Progress in Ground-source Heat Pumps Using Natural Refrigerants. International Journal of Refrigeration, 2018, 92: 70-85.
  49. Wei Wu, Harrison M. Skye*, Piotr A. Domanski. Selecting HVAC Systems to Achieve Comfortable and Cost-effective Residential Net-Zero Energy Buildings. Applied Energy, 2018, 212: 577-591.
  50. Wei Wu*, Haiyang Zhang, Tian You, Xianting Li*. Thermodynamic Investigation and Comparison of Absorption Cycles Using Hydrofluoroolefins and Ionic Liquid. Industrial & Engineering Chemistry Research, 2017, 56 (35): 9906–9916.
  51. Wei Wu, Haiyang Zhang, Tian You, Xianting Li*. Performance comparison of absorption heating cycles using various low-GWP and natural refrigerants. International Journal of Refrigeration, 2017, 82: 56-70.
  52. Wei Wu, Wenxing Shi, Jian Wang, Baolong Wang, Xianting Li*. Experimental investigation on NH3–H2O compression-assisted absorption heat pump (CAHP) for low temperature heating under lower driving sources. Applied Energy, 2016, 176: 258-271.
  53. Wei Wu, Siyuan Ran, Wenxing Shi, Baolong Wang, Xianting Li*. NH3-H2O water source absorption heat pump (WSAHP) for low temperature heating: Experimental investigation on the off-design performance. Energy, 2016, 115: 697-710.
  54. Wei Wu, Baolong Wang, Sheng Shang, Wenxing Shi, Xianting Li*. Experimental investigation on NH3–H2O compression-assisted absorption heat pump (CAHP) for low temperature heating in colder conditions. International Journal of Refrigeration, 2016, 67: 109-124.
  55. Wei Wu, Xianting Li*, Tian You, Baolong Wang, Wenxing Shi. Combining ground source absorption heat pump with ground source electrical heat pump for thermal balance, higher efficiency and better economy in cold regions. Renewable Energy, 2015, 84:74-88.
  56. Wei Wu, Wenxing Shi, Xianting Li*, Baolong Wang. Air source absorption heat pump in district heating: Applicability analysis and improvement options. Energy Conversion and Management, 2015, 96: 197-207.
  57. Wei Wu, Wenxing Shi, Baolong Wang, Xianting Li*. Annual performance investigation and economic analysis of heating systems with a compression-assisted air source absorption heat pump. Energy Conversion and Management, 2015, 98: 290-302.
  58. Wei Wu, Xianting Li*, Tian You, Baolong Wang, Wenxing Shi. Hybrid ground source absorption heat pump in cold regions: Thermal balance keeping and borehole number reduction. Applied Thermal Engineering, 2015, 90: 322-334.
  59. Wei Wu, Baolong Wang, Wenxing Shi, Xianting Li*. An overview of ammonia-based absorption chillers and heat pumps. Renewable and Sustainable Energy Reviews, 2014, 31: 681-707.
  60. Wei Wu, Tian You, Baolong Wang, Wenxing Shi, Xianting Li*. Simulation of a combined heating, cooling and domestic hot water system based on ground source absorption heat pump. Applied Energy, 2014, 126: 113-122.
  61. Wei Wu, Baolong Wang, Wenxing Shi, Xianting Li*. Absorption heating technologies: A review and perspective. Applied Energy, 2014, 130: 51-71.
  62. Wei Wu, Tian You, Baolong Wang, Wenxing Shi, Xianting Li*. Evaluation of Ground Source Absorption Heat Pumps Combined with Borehole Free Cooling. Energy Conversion and Management, 2014, 79: 334-343.
  63. Wei Wu, Baolong Wang, Wenxing Shi, Xianting Li*. Techno-economic Analysis of Air Source Absorption Heat Pump: Improving Economy from a Design Perspective. Energy and Buildings, 2014, 81: 200-210.
  64. Wei Wu, Baolong Wang, Wenxing Shi, Xianting Li*. Performance Improvement of Ammonia/absorbent Air Source Absorption Heat Pump in Cold Regions. Building Services Engineering Research and Technology, 2014, 35(5): 451-464.
  65. Wei Wu, Baolong Wang, Wenxing Shi, Xianting Li*. Crystallization Analysis and Control of Ammonia-Based Air Source Absorption Heat Pump in Cold Regions. Advances in Mechanical Engineering, 2013, doi:10.1155/2013/140341.
  66. Wei Wu, Baolong Wang, You Tian, Wenxing Shi, Xianting Li*. A potential solution for thermal imbalance of ground source heat pump systems in cold regions: Ground source absorption heat pump. Renewable Energy, 2013, 59: 39-48.
  67. Wei Wu, Wenxing Shi, Baolong Wang, Xianting Li*. A new heating system based on coupled air source absorption heat pump for cold regions: Energy saving analysis. Energy Conversion and Management, 2013, 76: 811-817.
  68. Wei Wu, Xiaoling Zhang, Xianting Li*, Wenxing Shi, Baolong Wang. Comparisons of different working pairs and cycles on the performance of absorption heat pump for heating and domestic hot water in cold regions. Applied Thermal Engineering, 2012, 48: 349–358.

Main Patents

  1. W Wu*. Device and method of hybrid absorption-compression heat pump with refrigerant injection, 2021. (US patent granted)
  2. W Wu*. Device and method of hybrid absorption-compression heat pump with refrigerant release, 2021. (US Patent granted)
  3. W Wu*. Device and method of hybrid heat pump with refrigerant injection at absorption-side and compression-side, 2021. (US Patent granted)
  4. W Wu*, ZX Ding, YR Sui, C Zhai, Zengguang Sui. A compact membrane-based thermochemical energy storage system, 2021. (US patent filed)
  5. W Wu*, C Zhai, ZG Sui, YR Sui, ZX Ding. A compact membrane-based absorption heat pump, 2021. (US patent filed)
  6. W Wu*, FX Li, ZG Sui, ZX Ding, YR Sui, C Zhai, HS Lin. Membrane-based desorption cooling method for passive thermal management, 2021. (US patent filed)
  7. W Wu*, ZX Ding. A two-stage absorption energy storage device and its operating method, 2022. (CN Patent filed)
  8. W Wu*, ZX Ding. A compression-assisted multi-effect absorption thermal energy storage device and its operating method, 2020. (CN Patent filed)
  9. W Wu*. A multi-functional solar hybrid-energy heat pump with absorption thermal energy storage, 2020. (CN Patent filed)
  10. XT Li*, W Wu, BL Wang, WX Shi, T You, XL Zhang, BT Li. A ground source heat pump system combined with free cooling using heating terminals. 3. (CN Patent granted)
  11. XT Li*, W Wu, T You, WX Shi, BL Wang. A ground source absorption heat pump system with three functions. 4. (CN Patent granted)
  12. XT Li*, W Wu, WX Shi, BL Wang, XL Zhang. A spraying type air source absorption heat pump. 0. (CN Patent granted)
  13. XT Li*, W Wu, WX Shi, XL Zhang, BL Wang, SY Ran. An energy-tower type absorption chilled and hot water unit. 4. (CN Patent granted)
  14. XT Li*, W Wu, BL Wang, SY Ran, PL Zhang, WX Shi. An integrated solar air source heat pump. 2. (CN Patent granted)
  15. XT Li*, WJ Ji, W Wu, BL Wang, Y Geng, WB Pan, WX Shi. A deep heat-recovery device and method for boiler exhaust. ZL201410374397.0. (CN Patent granted)
  16. XT Li*, SY Ran, W Wu, WX Shi, BL Wang. A hybrid solar-air source heat pump with single-evaporator. 3. (CN Patent granted)
  17. XT Li*, SY Ran, W Wu, BL Wang, WX Shi. An air-source chilled and hot water unit. ZL 201510779843.0. (CN Patent granted)
  18. XT Li*, SY Ran, W Wu, WX Shi, BL Wang. A solar-air source heat pump. ZL 201521132010.7. (CN Patent granted)
Staff Image
Dr. Wei WU
Contact Information
Office: YEUNG-G5712
Phone: +(852)-3442-4436
Fax: +(852)-3442-0688
Email: weiwu53@cityu.edu.hk

Time slots for consultation

Research Interests
  • Advanced heat pumps
  • Novel working fluids
  • Thermal energy storage
  • Advanced thermal management