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Heat and Mass Transfer

, Volume 53, Issue 9, pp 2915–2931 | Cite as

Performance evaluation of ejector expansion combined cooling and power cycles

  • Hadi GhaebiEmail author
  • Hadi Rostamzadeh
  • Pouria Seyed Matin
Original

Abstract

This paper studies performance characteristics of a basic ejector expansion combined cooling and power cycle (EECCPC) as well as three modified ones. These modified cycles are EECCPC incorporating turbine bleeding, regenerative EECCP cycle, and EECCP cycle incorporating with both turbine bleeding and regeneration. The expansion valve has been replaced by a two-phase ejector-expander in the traditional CCP cycle to improve the first and second-law efficiencies. Furthermore, the exergy destruction for components of the systems as well as the whole systems has been calculated, leading to determination of the main source of irreversibility in different cycles. The results of the exergy analysis reveals that the generator has the major contribution role in the overall losses of the systems. The results also show that the EECCP cycle surpasses the TCCP cycle in terms of thermal and exergy efficiencies. As a matter of fact, the thermal and exergy efficiencies are improved by 6.02, and 5.44%, respectively, throughout this successive modification. At last, sensitivity analysis of different key parameters on performance of the cycles has been investigated. It is shown that one can obtain higher thermal efficiency by increasing of the generator and evaporator temperatures or decreasing of the condenser temperature.

List of symbols

Symbols

CCPC

Combined cooling and power cycle

\(\dot{E}\)

Exergy rate \(\left( {\text{kW}} \right)\)

EECCPC

Ejector expander CCPC

h

Specific enthalpy \(\left( {{\text{kJ}}\,{\text{kg}}^{ - 1} } \right)\)

\(\dot{m}\)

Mass flow rate \(\left( {{\text{kg}}\,{\text{s}}^{ - 1} } \right)\)

P

Pressure \(\left( {\text{MPa}} \right)\)

\(\dot{Q}\)

Heat transfer rate \(\left( {\text{kW}} \right)\)

REECCPC

Regenerative EECCPC

RTBEECCPC

Both turbine bleeding and regeneration EECCPC

s

Specific entropy \(\left( {{\text{kJ}}\,{\text{kg}}^{ - 1} \,{\text{K}}^{ - 1} } \right)\)

T

Temperature \(\left( {\text{K}} \right)\)

TBEECCPC

Turbine bleeding EECCPC

TCCPC

Traditional CCPC

U

Mass entrainment ratio

v

Specific volume \(\left( {{\text{m}}^{3} \,{\text{kg}}^{ - 1} } \right)\)

\(\dot{W}\)

Power \(\left( {\text{kW}} \right)\)

Greek symbols

η

Efficiency (%)

Subscripts and superscripts

c

Condenser

CH

Chemical

com

Compressor

D

Destruction

d

Diffuser

e

Evaporator

ej

Ejector

EV

Expansion valve

Ex

Exergetic

F

Fuel

FFH

Feed fluid heater

g

Generator

IHE

Internal heat exchanger

i

Component of i

in

Inlet

int

Intermediate

is

Isentropic

KN

Kinetical

m

Mixer

n

Nozzle

net

Net value

out

Outlet

P

Product

p

Pump

pf

Primary flow

PH

Physical

PT

Potential

s

Constant entropy

sep

Separator

sf

Secondary flow

t

Turbine

suc

Suction

th

Thermal

total

Total value

v

Vapor

w

Water

1, 2, …

Cycle locations

0

Dead state

References

  1. 1.
    Yapici R, Ersoy HK (2005) Performance of characteristics of the ejector refrigeration system based on the constant area ejector flow model. Energy Convers Manag 46(18–19):3117–3135CrossRefGoogle Scholar
  2. 2.
    Ersoy HK, Yalcin S, Yapici R, Ozgoren M (2007) Performance of solar ejector cooling system in the southern region of turkey. Appl Energy 84(9):971–983CrossRefGoogle Scholar
  3. 3.
    Chandra W, Ahmed MR (2014) Experimental and computational studies on a steam jet refrigeration system with constant area and variable area ejectors. Energy Convers Manag 79(3):377–386CrossRefGoogle Scholar
  4. 4.
    Cardemil JM, Colle S (2012) A general model for evaluation of vapor ejectors performance for application in refrigeration. Energy Convers Manag 64:78–86CrossRefGoogle Scholar
  5. 5.
    Yapicic R (2008) Experimental and investigation of performance of vapor ejector refrigeration system using refrigerant R-123. Energy Convers Manag 49(5):953–961CrossRefGoogle Scholar
  6. 6.
    Wang F, Shen SQ, Li DY (2014) Evaluation on environment-friendly refrigerants with similar normal boiling points in ejector refrigeration system. Heat Mass Transf 51:965–972CrossRefGoogle Scholar
  7. 7.
    Sag NB, Ersoy HK, Hepbasli A, Halkaci HS (2015) Energetic and exergetic comparison of basic and ejector expander refrigeration system operating under the same external conditions and cooling capacities. Energy Convers Manag 90:184–194CrossRefGoogle Scholar
  8. 8.
    Kornhauser, A. A. The use of an ejector as a refrigerant expander. In: International Refrigeration and Air Conditioning Conference, 1990. 10-9Google Scholar
  9. 9.
    Menegay P, Kornhauser AA (1996) Improvements to the ejector expansion refrigeration cycle. In: Proceedings of the 13th intersociety energy conversion engineering conference, Washington DC, pp 702–706Google Scholar
  10. 10.
    Li H, Cao F, Bu X, Wang X (2014) Performance characteristics of R1234yf ejector-expansion refrigeration cycle. Appl Energy 121:96–103CrossRefGoogle Scholar
  11. 11.
    Nehdi E, Kairouani L, Bouzaina M (2007) Performance analysis of the vapor compression cycle using ejector as an expander. Int J Energy Res 31:364–375CrossRefGoogle Scholar
  12. 12.
    Lawrence N, Elbel S (2013) Theoretical and practical comparison of two-phase ejector refrigeration cycles including first and second law analysis. Int J Refrig 36(4):1220–1232CrossRefGoogle Scholar
  13. 13.
    Yari M (2009) Performance analysis of and optimization of a new two-stage ejector-expansion transcritical CO2 refrigeration cycle. Int J Therm Sci 48(10):1997–2005CrossRefGoogle Scholar
  14. 14.
    Lawrence N, Elbel S (2013) Experimental investigation of a two-phase ejector cycle suitable for use with low-pressure refrigerants R134a and R1234yf. Int J Refrig 38(1):310–322Google Scholar
  15. 15.
    Zhang Z, Ma YT, Wang HL, Li MX (2013) Theoretical evaluation on effect of internal heat exchanger in ejector expansion transcritical CO2 refrigeration cycle. Appl Therm Eng 50(1):932–938CrossRefGoogle Scholar
  16. 16.
    Vijayaraghavan S, Goswami DY (2003) On evaluating efficiency of a combined power and cooling cycle. J Energy Res Technol 125(3):221–227CrossRefGoogle Scholar
  17. 17.
    Zhang N, Lior N (2007) Methodology for thermal design of novel combined refrigeration/power binary fluid systems. Int J Refrig 30(6):1072–1085CrossRefGoogle Scholar
  18. 18.
    Xu F, Goswami DY, Bhagwat SS (2000) A combined power/cooling cycle. Energy 25(3):233–246CrossRefGoogle Scholar
  19. 19.
    Jiang L, Wang LW, Liu CZ, Wang RZ (2016) Experimental study on a resorption system for power and refrigeration cogeneration. Energy 97:182–190CrossRefGoogle Scholar
  20. 20.
    Alexis GK (2007) Performance parameters for the design of a combined refrigeration and electrical power cogeneration system. Int J Refrig 30(6):1097–1103CrossRefGoogle Scholar
  21. 21.
    Yari M, Mahmoudi SMS (2011) A thermodynamic study of waste heat recovery from GT-MHR using organic Rankine cycles. Heat Mass Transf 47:181–196CrossRefGoogle Scholar
  22. 22.
    Saleh B (2016) Parametric and working fluid analysis of a combined organic Rankine-vapor compression refrigeration system activated by low-grade thermal energy. J Adv Res 7(5):651–660CrossRefGoogle Scholar
  23. 23.
    Zheng B, Weng YW (2010) A combined power and ejector refrigeration cycle for low temperature heat sources. Sol Energy 84(5):784–791CrossRefGoogle Scholar
  24. 24.
    Yang X, Zheng N, Zhao L, Deng S, Li H, Yu Z (2016) Analysis of a novel combined power and ejector refrigeration cycle. Energy Convers Manag 108:266–274CrossRefGoogle Scholar
  25. 25.
    Wang J, Zhao P, Niu X, Dai Y (2012) Parametric analysis of a new combined cooling, heating and power system with transcritical CO2 driven by solar energy. Appl Energy 94:58–64CrossRefGoogle Scholar
  26. 26.
    Zheng D, Chen B, Qi Y, Jin H (2006) Thermodynamic analysis of novel absorption power/cooling combined cycle. Appl Energy 83(4):311–323CrossRefGoogle Scholar
  27. 27.
    Kalina AI, Leibowitz HM (1987) Appling Kalina technology to a bottoming cycle for utility combined cycles. In: ASME, International gas turbine conference and exhibitGoogle Scholar
  28. 28.
    Zhang N, Cai R, Lior NA (2004) A novel ammonia-water cycle for power and refrigeration cogeneration. ASME, AnaheimCrossRefGoogle Scholar
  29. 29.
    Zhang N, Lior N (2005) Configuration selection methodology for combined power/refrigeration generation ammonia-water cycles. In: Proceedings of the ECOS 2005, 1, June, Trondheim, Norway, pp 953–960Google Scholar
  30. 30.
    Bejan A, Tsataronis G, Moran M (1996) Thermal design and optimization. Wiley, New YorkGoogle Scholar
  31. 31.
    Saleh B (2016) Performance analysis and working fluid selection for ejector refrigeration cycle. Appl Therm Eng 107:114–124CrossRefGoogle Scholar
  32. 32.
    Dokandari DA, Hagh AS, Mahmoudi SMS (2014) Thermodynamic investigation and optimization of novel ejector-expansion CO2/NH3 cascade refrigeration cycles (novel CO2/NH3). Int J Refrig 46:26–36CrossRefGoogle Scholar
  33. 33.
    Smierciew K, Gagan J, Butrymowicz D, Karwacki J (2014) Experimental investigations of solar driven ejector air-conditioning system. Energy Build 80:260–267CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Hadi Ghaebi
    • 1
    Email author
  • Hadi Rostamzadeh
    • 1
  • Pouria Seyed Matin
    • 1
  1. 1.Department of Mechanical Engineering, Faculty of EngineeringUniversity of Mohaghegh ArdabiliArdabilIran

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