Numerical analysis of the flow parameters on the heat transfer performance of a two-stage spiral casing heat exchanger

Zhiqiang Li, Xianfei Liu, Fang Wang, Caixia Zhu, Haofei Zhang, Shiyuan Wang

Article ID: 1525
Vol 5, Issue 1, 2022

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Abstract


The study of the performance of high-efficiency heat pump systems has been a hot issue of general interest in the field of heat pump air conditioning. For the designed and developed two-stage casing tandem heat exchanger of heat pump system, the 3D finite volume method and the realizable k-ε model are used to numerically analyze the influence law of inlet fluid temperature and flow velocity on the overall heat transfer coefficient as well as the Nussle number of inner and outer tubes. The results show that decreasing the inlet water temperature or increasing the inlet refrigerant temperature can improve the overall heat transfer performance; Nuin increases with the increase of water and refrigerant flow rates, while Nuout increases with the increase of water flow rate but decreases with the increase of refrigerant flow rate; Nuin and Nuout both increase with the decrease of water temperature or refrigerant temperature increases.


Keywords


Flow Parameter; Heat Pump; Spiral Tube Heat Exchanger; Heat Transfer Performance; Nusselt Number

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References


1. Omidi M, Farhadi M, Jafari M. A comprehensive review on double pipe heat exchangers. Applied Thermal Engineering 2017; 110: 1075–1090.

2. Omidi M, Farhadi M, Ali RDA. Numerical study of heat transfer on using lobed cross sections in helical coil heat exchangers: Effect of physical and geometrical parameters. Energy Conversion and Management 2018; 176: 236–245.

3. Dehghan B, Sisman A, Aydin M. Parametric investigation of helical ground heat exchangers for heat pump applications. Energy and Buildings 2016; 127: 999–1007.

4. Ren X, Wang Y, Peng J. The experimental system development of enhanced heat transfer in double pipe heat exchanger. Refrigeration and Air Conditioning 2014; 28(4): 469–471.

5. Liao B. Simulation research of impact of heat exchanger capacity of Heat exchanger casing’s structural changes.Refrigeration and Air Condition 2010; 24(1): 40–44.

6. Zhang X, Xia X, Hao P. Experimental study on condensation heat transfer performance of R417a in spiral casing condenser. Journal of Thermal Science and Technology 2019; 18(2): 100–107.

7. Lv J, Ma Y, Cao K, et al. Design and experimental study on CO2 water-cooled tube-intube gas cooler. Journal of Refrigeration 2016; 37(2): 113–118.

8. Ma R, Ma R, Wang Z, et al. Study on the new type tube-in-tube evaporative condenser performance.Bulletin of Science and Technology 2015; 31(7): 122–125.

9. Chen H, Gan X. Simulation and experiment study on performance of double-pipe heat exchanger. Computer Simulation 2015; 32(2): 256–260.

10. Colorado-Garrido D, Santogo-Castelazo E, Her-nandez JA, et al. Heat transfer of a helical double pipe vertical evaporator: Theoretical analysis and experimental validation. Applied Energy 2009; 86(7-8): 1144–1153.

11. Wu Z, Wang L, Sundn B. Pressure drop and convective heat transfer of water and nanofluids in a double-pipe helical heat exchanger. Applied Thermal Engineering 2013; 60(1-2): 266–274.

12. Elattar HF, Fouda A, Nada SA, et al. Thermal and hydraulic numerical study for a novel multi tubes in tube helically coiled heat exchangers: Effects of operating/geometric parameters. International Journal of Thermal Sciences 2018; 128: 70–83.

13. Fouda A, Nada SA, Elattar HF, et al. Thermal performance modeling of turbulent flow in multi tube in tube helically coiled heat exchangers. International Journal of Mechanical Sciences 2018; 135: 621–638.

14. Liu X, Wang F, Li Z, et al. Parametric investigation of thermal-hydrodynamic performance in the innovative helically coiled heat exchangers in the heat pump system. Energy and Buildings 2020; 216: 109961.

15. Wang F, Fan X, Lian Z. Experimental study on an inverter heat pump with HFC125 operating near the refrigerant critical point. Applied Thermal Engineering 2012; 39: 1–7.

16. Wang F, Fan X, Lian Z, et al. Performance assessment of heat pumps using HFC125/HCs mixtures. International Journal of Energy Research 2011; 31: 135–147.

17. Sheeba A, Abhijith CM, Jose PM. Experimental and numerical investigations on the heat transfer and flow characteristics of a helical coil heat exchanger. International Journal of Refrigeration 2019; 99: 490–497.




DOI: https://doi.org/10.24294/tse.v5i1.1525

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