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Performance of multiple mini-tube heat exchangers as an internal heat exchanger of a vapor-injection cycle heat pump

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Abstract

A multiple mini-tube (MMT) heat exchanger was considered as an internal heat exchanger of vapor-injection cycle heat pump. Heat transfer and pressure drop in multiple mini-tube heat exchangers were numerically and experimentally investigated. Results show that the best performance of the MMT heat exchanger can be obtained when the intermediate-pressure two-phase refrigerant is supplied to the shell-side and this refrigerant reaches a saturated vapor state at the exit of the heat exchanger.

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Abbreviations

A :

Area (m2)

Bo :

Boiling number

C :

Specific heat (J/kg K)

D :

Diameter (m)

f :

Friction factor

G :

Mass flux (kg/m2 s)

h :

Heat transfer coefficient (W/m2 K)

i :

Specific enthalpy (kJ/kg)

k :

Thermal conductivity (W/m K)

L :

Length (m)

\(\dot{m}\) :

Mass flow rate (kg/s)

Pr :

Prandtl number

Re :

Reynolds number

T :

Temperature (K)

U :

Overall heat transfer coefficient (W/m2 K)

x :

Vapor quality

ε :

Wall roughness (mm)

ρ :

Density (kg/m)

\(\phi^{2}\) :

Frictional two-phase multiplier

μ :

Viscosity (Pa s)

a :

Actual

s :

Shell-side

sp :

Single-phase

t :

Tube-side

tp :

Two-phase

v :

Vapor

l :

Liquid

hp :

High-pressure- side

int :

Intermediate-pressure-side

in :

Inlet

max :

Maximum

out :

Outlet

References

  1. Umezu K, Suma S (1984) Heat pump room air-conditioner using variable capacity compressor. ASHRAE Trans 90(1a):335–349

    Google Scholar 

  2. Baek C, Lee E, Kang H, Kim Y (2008) Experimental study on the heating performance of a CO2 heat pump with gas injection. In: Proceedings of international refrigeration and air conditioning conference at Purdue

  3. Ma G, Zhao H (2008) Experimental study of a heat pump system with flash-tank coupled with scroll compressor. Energy Build 40:697–701

    Article  Google Scholar 

  4. Ko Y, Park S, Jin S, Kim B, Jeong JH (2013) The selection of volume ratio of two-stage rotary compressor and its effects on air-to-water heat pump with flash tank cycle. Appl Energy 104:187–196

    Article  Google Scholar 

  5. Kojo A, Lee SH, Choi JM (2013) Technology review of two-stage vapor compression heat pump system. Int J Air-Cond Refrig 21:1330002

    Article  Google Scholar 

  6. Dutta AK, Yanagisawa T, Fukuta M (2001) An investigation of the performance of a scroll compressor under liquid refrigerant injection. Int J Refrig 24:577–587

    Article  Google Scholar 

  7. Ma G, Chai Q, Jiang Y (2003) Experimental investigation of air source heat pump for cold regions. Int J Refrig 26:12–18

    Article  Google Scholar 

  8. Heo J, Jeong MW, Baek C, Kim Y (2011) Comparison of the heating performance of air-source heatpumps using various types of refrigerant injection. Int J Refrig 34:444–453

    Article  Google Scholar 

  9. Boewe D, Bullard CW, Yin JM (2001) Contribution of an internal heat exchanger to transcritical R744 cycle performance. HVAC&R Res 7(2):155–168

    Article  Google Scholar 

  10. Wang Z, Gong Y, Wu XH, Lu YL (2013) Thermodynamic analysis and experimental research of transcritical CO2 cycle with internal heat exchanger and dual expansion. Int J Air-Cond Refrig 21:1350005

    Article  Google Scholar 

  11. Sarkar J (2012) Transcritical CO2 refrigeration systems: comparison with conventional solutions and applications. Int J Air-Cond Refrig 20:1250017

    Article  Google Scholar 

  12. Navarro-Esbri J, Cabelloa R, Torrella E (2005) Experimental evaluation of the internal heat exchanger influence on a vapour compression plant energy efficiency working with R22, R134a and R407C. Energy 30:621–635

    Article  Google Scholar 

  13. Jeong JH, Park S, Sarker D, Chang KS (2012) Numerical simulation of the effects of a suction line heat exchanger on vapor compression refrigeration cycle performance. J Mech Sci Technol 26:1213–1226

    Article  Google Scholar 

  14. Dabas JK, Kumar S, Dodeja AK, Kasana KS (2014) Experimental investigation of a refrigeration system working under transient conditions. Int J Air-Cond Refrig 22:1450013

    Article  Google Scholar 

  15. Laohalertdecha S, Dalkilic AS, Wongwises S (2012) A review on the heat-transfer performance and pressure-drop characteristics of various enhanced tubes. Int J Air-Cond Refrig 20:1230003

    Article  Google Scholar 

  16. Gneilinski V (1976) New equation for heat and mass transfer in turbulent pipe and channel flow. Int J Chem Eng 16:359–368

    Google Scholar 

  17. Gungor KE, Winterton RHS (1987) Simplified general correlation for saturated flow boiling and comparisons of correlations. Chem Eng 65:148–156

    Google Scholar 

  18. Churchill SW (1977) Friction equation spans all fluid flow regimes. Chem Eng 84:91–92

    Google Scholar 

  19. Lin S, Kwok CCK, Li RY, Chen ZH, Chen ZY (1991) Local frictional pressure drop during vaporization of R-12 through capillary tubes. Int J Multiph Flow 17(1):95–102

    Article  MATH  Google Scholar 

  20. Idelchik IE, Fried E (1986) Handbook of hydraulic resistance, 2nd edn. Hemisphere Publishing, New York

    Google Scholar 

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Acknowledgments

This work was supported by the Human Resources Development program (No. 20124010203230) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) Grant funded by the Korea government Ministry of Trade, Industry and Energy and Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (NRF-2012R1A1A2007320).

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Authors and Affiliations

  1. School of Mechanical Engineering, Pusan National University, Busan, 609-735, Korea

    Jin Yong Jang & Ji Hwan Jeong

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  1. Jin Yong Jang
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  2. Ji Hwan Jeong
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Correspondence to Ji Hwan Jeong.

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Jang, J.Y., Jeong, J.H. Performance of multiple mini-tube heat exchangers as an internal heat exchanger of a vapor-injection cycle heat pump. Heat Mass Transfer 52, 741–752 (2016). https://doi.org/10.1007/s00231-015-1592-5

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