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Heat and Mass Transfer

, Volume 55, Issue 12, pp 3523–3536 | Cite as

Proposal and month-wise performance evaluation of a novel dual-mode evaporative cooler

  • Sarvesh Kashyap
  • Jahar SarkarEmail author
  • Amitesh Kumar
Original
  • 74 Downloads

Abstract

Three climatic zones (composite, hot-dry, hot-humid) cover most of the regions in India. Direct evaporative cooler is suitable for dry and indirect regenerative evaporative cooler is suitable for humid months. To avoid the use of two different coolers for the same purpose during the composite climate (significant seasonal variations of temperature and humidity), a novel two-in-one evaporative cooler is proposed and numerically investigated in this study. Proposed cooler takes advantage of both types of evaporative cooler and be operated in dual mode: acts as direct evaporative cooler for hot-dry and acts as regenerative indirect evaporative cooler for hot-wet seasons. The working of both modes (direct and regenerative) is explained with the help of a diagram. Effects of channels height and water flow rate on cooling capacity, wet bulb effectiveness, and dew point effectiveness are discussed. The month-wise performance of the proposed cooler is evaluated for five Indian cities (Bhopal, Lucknow and Varanasi of composite climate; Ahmedabad of hot-dry climate; Kolkata of hot-humid climate). Suitability of the modes in hot months (April to September) and cities are evaluated with the help of a psychometric chart. Study reveals that the proposed cooler can be effectively and economically used for composite climate.

Keywords

Dual mode evaporative cooler Regenerative evaporative cooler Direct evaporative cooler Composite climate Cooling capacity Dew point effectiveness 

Nomenclature

A

Heat transfer area (m2)

cp

Specific heat of air (kJ kg−1 K−1)

dh

Hydraulic diameter (m)

Dva

Binary diffusion coefficient of water vapor in air (m2 s−1)

hfg

Latent heat of evaporation (kJkg−1)

kpaper

Thermal conductivity of the wicking paper (Wm−1 K−1)

kplate

Thermal conductivity of the plate (Wm−1 K−1)

L

Length of the channel (m)

Mass flow rate (kg s−1)

RH

Relative humidity (%)

T

Temperature of air (°C)

Twf

Temperature of wetting fluid (°C)

tplate

Thickness of separating plate (m)

tpaper

Thickness of wicking paper (m)

U

Overall heat transfer coefficient (Wm−2 K−1)

W

Width of the channel (m)

Y1

Height of dry channel (m)

Y2

Height of wet channel (m)

Greek letters

α

Convective heat transfer coefficient (Wm−2 K−1)

αm

Mass transfer coefficient in wet channel (kg m−2 s−1)

ω

Humidity ratio (gkg−1)

ωwf

Saturation humidity at the wetting fluid temperature (gkg−1)

Subscripts

ad

air in dry channel

aw

air in wet channel

d

dry channel

w

wet channel

wf

wetting fluid (water)

Notes

Compliance with ethical standards

Conflict of interest

There is no conflict of interest.

References

  1. 1.
    Cuce PM, Riffat S (2016) A state of the art review of evaporative cooling systems for building applications. Renew Sust Energ Rev 54:1240–1249CrossRefGoogle Scholar
  2. 2.
    Hasan A (2010) Indirect evaporative cooling of air to a sub-wet bulb temperature. Appl Therm Eng 30:2460–2468CrossRefGoogle Scholar
  3. 3.
    Riangvilaikul B, Kumar S (2010) Numerical study of a novel dew point evaporative cooling system. Energy Build 42:2241–2250CrossRefGoogle Scholar
  4. 4.
    Riangvilaikul B, Kumar S (2010) An experimental study of a novel dew point evaporative cooling system. Energy Build 42:637–644CrossRefGoogle Scholar
  5. 5.
    Cui X, Chua KJ, Yang WM (2014) Numerical simulation of a novel energy-efficient dew-point evaporative air cooler. Appl Energy 136:979–988CrossRefGoogle Scholar
  6. 6.
    Heidarinejad G, Moshari S (2015) Novel modeling of an indirect evaporative cooling system with cross-flow configuration. Energy Build 92:351–362CrossRefGoogle Scholar
  7. 7.
    Pandelidis D, Anisimov S, Worek WM (2015) Comparison study of the counter- flow regenerative evaporative heat exchangers with numerical methods. Appl Therm Eng 84:211–224CrossRefGoogle Scholar
  8. 8.
    Duan Z, Zhan C, Zhao X, Dong X (2016) Experimental study of a counter-flow regenerative evaporative cooler. Building and Environment 104:47–58CrossRefGoogle Scholar
  9. 9.
    Fakhrabadi F, Kowsary F (2016) Optimal design of a regenerative heat and mass exchanger for indirect evaporative cooling. Appl Therm Eng 102:1384–1394CrossRefGoogle Scholar
  10. 10.
    Kabeel AE, Abdelgaied M (2016) Numerical and experimental investigation of a novel configuration of indirect evaporative cooler with internal baffles. Energy Convers Manag 126:526–536CrossRefGoogle Scholar
  11. 11.
    Lin J, Thu K, Bui TD, Wang RZ, Ng KC, Kumja M, Chua KJ (2016) Unsteady-state analysis of a counter-flow dew point evaporative cooling system. Energy 113:172–185CrossRefGoogle Scholar
  12. 12.
    Chua KJ, Xu J, Cui X, Ng KC, Islam MR (2016) Numerical heat and mass transfer analysis of a cross-flow indirect evaporative cooler with plates and flat tubes. Heat Mass Transf 52:1765–1777CrossRefGoogle Scholar
  13. 13.
    Boukhanouf R, Alharbi A, Ibrahim HG, Amer O, Worall M (2017) Computer modelling and experimental investigation of building integrated sub-wet bulb temperature evaporative cooling system. Appl Therm Eng 115:201–211CrossRefGoogle Scholar
  14. 14.
    Xu P, Ma X, Zhao X, Fancey K (2017) Experimental investigation of a super performance dew point air cooler. Appl Energy 203:761–777CrossRefGoogle Scholar
  15. 15.
    Duan Z, Zhao X, Li J (2017) Design fabrication and performance evaluation of a compact regenerative evaporative cooler : towards low energy cooling for buildings. Energy 140:506–519CrossRefGoogle Scholar
  16. 16.
    Zhu G, Chow T, Lee CK (2017) Performance analysis of counter-flow regenerative heat and mass exchanger for indirect evaporative cooling based on data-driven model. Energy Build 155:503–512CrossRefGoogle Scholar
  17. 17.
    Gilani N, Poshtiri AH (2017) Thermal design of two-stage evaporative cooler based on thermal comfort criterion. Heat Mass Transf 53:1355–1374CrossRefGoogle Scholar
  18. 18.
    Sohani A, Sayyaadi H, Mohammadhosseini N (2018) Comparative study of the conventional types of heat and mass exchangers to achieve the best design of dew point evaporative coolers at diverse climatic conditions. Energy Convers Manag 158:327–345CrossRefGoogle Scholar
  19. 19.
    Bishoyia D, Sudhakara K (2017) Experimental performance of a direct evaporative cooler in composite climate of India. Energy and Buildings 153:190–200CrossRefGoogle Scholar
  20. 20.
    Lin J, Thu K, Bui TD, Wang RZ, Ng KC, Chua KJ (2016) Study on dew point evaporative cooling system with counter-flow configuration. Energ Convers Manage 109:153–165CrossRefGoogle Scholar
  21. 21.
    Klein SA (2017) Engineering Equation Solver Professional, Version V10.215, F-Chart Software, Madison, WIGoogle Scholar
  22. 22.
    Zhao X, Li JM, Riffat SB (2008) Numerical study of a novel counter-flow heat and mass exchanger for dew point evaporative cooling. Appl Therm Eng 28:1942–1951CrossRefGoogle Scholar
  23. 23.
    Lee J, Lee D (2013) Experimental study of a counter flow regenerative evaporative cooler with finned channels. Int J Heat Mass Transf 65:173–179CrossRefGoogle Scholar

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringIndian Institute of Technology (B.H.U.)VaranasiIndia

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