Heat and Mass Transfer

, Volume 55, Issue 2, pp 489–500 | Cite as

Theoretical and experimental research on using quasi saturation isentropic compression discharge temperature to control refrigerant mass flow rate

  • Lihao HuangEmail author
  • Leren Tao
  • Chao Wang
  • Lihui Yang


It is common to control refrigerant mass flow rate by suction superheat in a vapor compression system. This paper puts forward a method which is called Quasi Saturation Isentropic Compression Discharge Temperature (QSICDT) Control. First, this control method is used to theoretically analyze the system performance for R22, R134a, R32 and R410A refrigerants under the condition of air conditioning (AC) and refrigeration applications, and it means that the method is applicable to R22 and R32 refrigeration system through experimental study. When optimizing the discharge state, it is found that the COP has a maximum value. Second, from the experimental results, it can be known that the cooling capacity and COP could reach the maximum value, when the suction vapor quality for the R32 refrigeration system is about 0.99. The experimental results also show that using QSICDT can control the suction refrigerant with a little liquid. QSICDT Control is favorable for R32 system, which need to decrease the discharge temperature and improve the system performance. The capacity and COP all have a little increase when the wet compression is applied in R22 and R32 system. Compared to ARI superheat control, R32 COP for QSI Compression can improve 3 and 5% for AC and refrigeration application, respectively. As a result, it is possible to control refrigerant mass flow rate according to operating conditions. And it can promote and apply refrigerant R32 to the air conditioning system with low environmental burden, high energy-efficiency and relatively low cost.



non-dimensional mass flow rate


enthalpy, kJ·kg−1


refrigerant mass flow rate, kg·s−1


pressure, kPa


cooling capacity, kW


compressor power, kW


vapor quality


entropy, kJ·kg−1·K−1


temperature, K


compression efficiency


the actual measured compression efficiency


compressor shell heat loss rate, kW


refrigerant density at the inlet of the compressor, kg·m−3


the volume flowrate at the inlet of the compressor, m3·s−1


compressor shell heat loss factor ∆T - superheat, K



compressor suction


isentropic process


compressor discharge


condenser sub-cooling



Quasi saturation isentropic compression discharge temperature


Air conditioning


Coefficient of performance


Quasi saturation isentropic


Air Conditioning and Refrigeration Institute


Compressor heat loss index


Programmable logic controller


Proportion integration differentiation


Fund projects

Shanghai key laboratory of multiphase flow and heat transfer of power engineering (13DZ2260900), Shanghai Education Committee Project (10-17-301-803), and PhD Start-up Fund(1D-16-301-007).


  1. 1.
    Huelle ZH (1972) The MSS line-a new approach to the hunting problem. ASHRAE J 10:43–46Google Scholar
  2. 2.
    Mithraratne P, Wijeysundera NE (2001) An experimental and numerical study of the dynamic behaviour of a counter-flow evaporator. Int J Refrig 24:554–565CrossRefGoogle Scholar
  3. 3.
    Chen W, Zhijiu C, Ruiqi Z, Yezheng W (2002) Experimental investigation of a minimum stable superheat control system of an evaporator. Int J Refrig 25:1137–1142CrossRefGoogle Scholar
  4. 4.
    Elliott MS, Rasmussen BP (2010) On reducing evaporator superheat nonlinearity with control architecture. Int J Refrig 33:607–614CrossRefGoogle Scholar
  5. 5.
    Hua L, Jeong S-K, You S-S (2009) Feedforward control of capacity and superheat for a variable speed refrigeration system. Appl Therm Eng 29:1067–1074CrossRefGoogle Scholar
  6. 6.
    Fallahsohi H, Changenet C, Place S, Ligeret C, Lin-Shi X (2010) Predictive functional control of an expansion valve for minimizing the superheat of an evaporator. Int J Refrig 33:409–418CrossRefGoogle Scholar
  7. 7.
    Vinther K, Rasmussen H, Izadi-Zamanabadi R, Stoustrup J (2013) Single temperature sensor superheat control using a novel maximum slope-seeking method. Int J Refrig 36:1118–1129CrossRefGoogle Scholar
  8. 8.
    Dutta AK, Yanagisawa T, Fukuta M (2001) An investigation of the performance of a scroll compressor under liquid refrigerant injection. Int J Refrig 24:577–587CrossRefGoogle Scholar
  9. 9.
    Infante Ferreira CA, Zaytsev D, Zamfirescu C (2006) Wet compression of pure refrigerants, International Compressor Engineering Conference, paper 1778Google Scholar
  10. 10.
    Wang X, Hwang Y, Radermacher R (2008) Investigation of potential benefits of compressor cooling. Appl Therm Eng 28:1791–1797CrossRefGoogle Scholar
  11. 11.
    Yajima R, Yoshimi A, Piao C-c (2011) Measures to reduce the discharge temperature of R32 compressor. Refrigeration and Air-conditioning 11:60–64Google Scholar
  12. 12.
    Kusatsu ST, Kusatsu JT, Kusatsu KS Refrigerating device, United States Patent US006581397B1 (2003-6-24)Google Scholar
  13. 13.
    Lumpkin DR, Bahman AM, Groll EA (2018) Two-phase injected and vapor-injected compression: experimental results and mapping correlation for a R-407C scroll compressor. Int J Refrig 86:449–462CrossRefGoogle Scholar
  14. 14.
    Air Conditioning and Refrigeration Institute (ARI) (1999) ANSI/ARI Standard 540, Positive displacement refrigerant compressors and compressor unitsGoogle Scholar
  15. 15.
    Li W (2013) Simplified steady-state modeling for variable speed compressor. Appl Therm Eng 50:318–326CrossRefGoogle Scholar
  16. 16.
    Gensei taro (1982) The principle and performance of refrigeration device chapter 6.1. Agriculture pressGoogle Scholar
  17. 17.
    Itard LCM (1995) Wet compression versus dry compression in heat pumps working with pure refrigerants or non-azeotropic mixtures. Int J Refrig 18:495–504CrossRefGoogle Scholar
  18. 18.
    Vorster PPJ, Meyer JP (2000) Wet compression versus dry compression in heat pumps working with pure refrigerants or non-azeotropic binary mixtures for different heating applications. Int J Refrig 23:292–311CrossRefGoogle Scholar
  19. 19.
    Lemmon EW, McLinden MO, Huber ML (2002) REFPROP reference fluid thermodynamic and transport properties, NIST Standard Reference Database 23, Version 7.0Google Scholar
  20. 20.
    Kline SJ, McClintock FA (1953) Describing uncertainties in single-sample experiments. Mech Eng 75(1):3–8Google Scholar

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Institute of Refrigeration and CryogenicsUniversity of Shanghai for Science and TechnologyShanghaiChina

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