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Experimental study of an air humidity absorption cycle based on the MHI

  • Reza Moradi
  • Mohammad Reza SaffarianEmail author
  • Morteza Behbahani-Nejad
Article
  • 20 Downloads

Abstract

An office drinking water cooler is converted to a humidity absorption device. The reservoir-type evaporator of the water cooler is separated, and a finned-tube evaporator is installed. A channel is installed at the inlet of the evaporator. A fan, a cool-mist humidifier, and a heater are installed inside this channel, where the amount of humidity and heat production can be adjusted. Several pressure gauges are installed at different locations of the cycle and monitor cycle performance while working. Pressure variations in different locations of the cycle are measured at various inlet air conditions. The MHI is defined as the ratio of condensation enthalpy to the total given heat. Changes of this index are evaluated by changing the input conditions. Results show that with increasing the air temperature, the condenser and evaporator pressure increases. Results of absorbed water in various MHIs show that with increasing this index, the amount of absorbed water increases. The graph of the absorbed water based on the MHI can be used to estimate the amount of water collected from this device under different climatic conditions. The amounts of collected water from this device for several different cities of Iran are presented. Results show that in high MHIs for a device with a quarter horsepower, the water production rate can reach to 250 g h−1. Also, if the device is working continuously in these conditions, it can produce about 4 kg of water per day.

Keywords

Air humidity absorption Experimental analysis MHI Relative humidity Refrigeration cycle 

List of symbols

ac

Accuracy of a sensor

h

Enthalpy (kJ kg−1)

hfg

Latent enthalpy (kJ kg−1)

MHI

Moisture Harvesting Index

\(\dot{m}\)

Produced water per time (g h−1)

qtot

The heat needed to produce one kilogram of water (kJ kg−1)

r2

Coefficient of determination

R

A sample relation

T

Temperature (°C)

U

Standard uncertainty

Greek letters

φ

Relative humidity (%)

ω

Absolute humidity (kgwater kg air −1 )

Subscripts

i

Inlet

o

Outlet

Notes

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

References

  1. 1.
    Kummu M, Ward PJ, de Moel H, Varis O. Is physical water scarcity a new phenomenon? Global assessment of water shortage over the last two millennia. Environ Res Lett. 2010;5:034006.CrossRefGoogle Scholar
  2. 2.
    Macedonio F, Drioli E, Gusev AA, Bardow A, Semiat R, Kurihara M. Efficient technologies for worldwide clean water supply. Chem Eng Process Process Intensif. 2012;51:2–17.CrossRefGoogle Scholar
  3. 3.
    Doshi S, Chaudhari S, Aitwade S, Singh R, Waykole CP. Development of water generation system from air. Int J Curr Eng Technol. 2016;4:202–3.Google Scholar
  4. 4.
    Amy G, Ghaffour N, Li Z, Francis L, Linares RV, Missimer T, et al. Membrane-based seawater desalination: present and future prospects. Desalination. 2017;401:16–21.CrossRefGoogle Scholar
  5. 5.
    Garg K, Khullar V, Das SK, Tyagi H. Parametric study of the energy efficiency of the HDH desalination unit integrated with nanofluid-based solar collector. J Therm Anal Calorim. 2019;135:1465–78.  https://doi.org/10.1007/s10973-018-7547-6.CrossRefGoogle Scholar
  6. 6.
    Dhivagar R, Sundararaj S. Thermodynamic and water analysis on augmentation of a solar still with copper tube heat exchanger in coarse aggregate. J Therm Anal Calorim. 2019;136:89–99.  https://doi.org/10.1007/s10973-018-7746-1.CrossRefGoogle Scholar
  7. 7.
    Elimelech M, Phillip WA. The future of seawater desalination: energy, technology, and the environment. Science. 2011;333:712–7.  https://doi.org/10.1126/science.1200488.CrossRefPubMedPubMedCentralGoogle Scholar
  8. 8.
    Gido B, Friedler E, Broday DM. Assessment of atmospheric moisture harvesting by direct cooling. Atmos Res. 2016;182:156–62.CrossRefGoogle Scholar
  9. 9.
    Beysens D, Milimouk I. The case for alternative fresh water sources. Pour les Resour Altern en eau Secher. 2000;11:1–17.Google Scholar
  10. 10.
    Montecinos S, Carvajal D, Cereceda P, Concha M. Collection efficiency of fog events. Atmos Res. 2018;209:163–9.CrossRefGoogle Scholar
  11. 11.
    Klemm O, Schemenauer RS, Lummerich A, Cereceda P, Marzol V, Corell D, et al. Fog as a fresh-water resource: overview and perspectives. Ambio. 2012;41:221–34.  https://doi.org/10.1007/s13280-012-0247-8.CrossRefPubMedPubMedCentralGoogle Scholar
  12. 12.
    Domen JK, Stringfellow WT, Camarillo MK, Gulati S. Fog water as an alternative and sustainable water resource. Clean Technol Environ Policy. 2014;16:235–49.  https://doi.org/10.1007/s10098-013-0645-z.CrossRefGoogle Scholar
  13. 13.
    Khalil B, Adamowski J, Shabbir A, Jang C, Rojas M, Reilly K, et al. A review: dew water collection from radiative passive collectors to recent developments of active collectors. Sustain Water Resour Manag. 2016;2:71–86.  https://doi.org/10.1007/s40899-015-0038-z.CrossRefGoogle Scholar
  14. 14.
    Muñoz-García MA, Moreda GP, Raga-Arroyo MP, Marín-González O. Water harvesting for young trees using Peltier modules powered by photovoltaic solar energy. Comput Electron Agric. 2013;93:60–7.CrossRefGoogle Scholar
  15. 15.
    Sharan G, Roy AK, Royon L, Mongruel A, Beysens D. Dew plant for bottling water. J Clean Prod. 2017;155:83–92.CrossRefGoogle Scholar
  16. 16.
    Khalil B, Adamowski J, Rojas M, Reilly K. Towards an independent dew water irrigation system for arid or insular areas. In: 2014 ASABE Annual International Meeting. Montreal: American Society of Agricultural and Biological Engineers; 2014; p. 1–10.Google Scholar
  17. 17.
    Edmund A. Method for gaining water out of the atmosphere. Google Patents; 1938.Google Scholar
  18. 18.
    Scrivani A, Bardi U. A study of the use of solar concentrating plants for the atmospheric water vapour extraction from ambient air in the Middle East and Northern Africa region. Desalination. 2008;220:592–9.CrossRefGoogle Scholar
  19. 19.
    Seneviratne SI, Lüthi D, Litschi M, Schär C. Land–atmosphere coupling and climate change in Europe. Nature. 2006;443:205–9.CrossRefPubMedGoogle Scholar
  20. 20.
    El-Ghonemy AMK. RETRACTED: Fresh water production from/by atmospheric air for arid regions, using solar energy: review. Renew Sustain Energy Rev. 2012;16:6384–422.CrossRefGoogle Scholar
  21. 21.
    Wahlgren RV. Atmospheric water vapour processor designs for potable water production: a review. Water Res. 2001;35:1–22.CrossRefPubMedGoogle Scholar
  22. 22.
    Al-hassan GA. Fog water collection evaluation in Asir region–Saudi Arabia. Water Resour Manag. 2009;23:2805–13.  https://doi.org/10.1007/s11269-009-9410-9.CrossRefGoogle Scholar
  23. 23.
    Anbarasu T, Pavithra S. Vapour compression refrigeration system generating fresh water from humidity in the air. Int Conf Sustain Energy Intell Syst. 2011;45:75–9.  https://doi.org/10.1049/cp.2011.0338.CrossRefGoogle Scholar
  24. 24.
    Milani D, Qadir A, Vassallo A, Chiesa M, Abbas A. Experimentally validated model for atmospheric water generation using a solar assisted desiccant dehumidification system. Energy Build. 2014;77:236–46.CrossRefGoogle Scholar
  25. 25.
    Mohamed MH, William GE, Fatouh M. Solar energy utilization in water production from humid air. Sol Energy. 2017;148:98–109.CrossRefGoogle Scholar
  26. 26.
    Kim H, Rao SR, Kapustin EA, Zhao L, Yang S, Yaghi OM, et al. Adsorption-based atmospheric water harvesting device for arid climates. Nat Commun. 2018;9:1191.CrossRefPubMedPubMedCentralGoogle Scholar
  27. 27.
    Salek F, Moghaddam AN, Naserian MM. Thermodynamic analysis and improvement of a novel solar driven atmospheric water generator. Energy Convers Manag. 2018;161:104–11.CrossRefGoogle Scholar
  28. 28.
    WATAIR: Turning Air Into Water. 2007. https://inhabitat.com/watair-turning-air-into-water/. Accessed 3 Aug 2019
  29. 29.
    Harriman LG. The dehumidification handbook. Amesbury: Munters Cargocaire; 1990.Google Scholar
  30. 30.
    Nazari S, Safarzadeh H, Bahiraei M. Performance improvement of a single slope solar still by employing thermoelectric cooling channel and copper oxide nanofluid: an experimental study. J Clean Prod. 2019;208:1041–52.CrossRefGoogle Scholar
  31. 31.
    Nazari S, Safarzadeh H, Bahiraei M. Experimental and analytical investigations of productivity, energy and exergy efficiency of a single slope solar still enhanced with thermoelectric channel and nanofluid. Renew Energy. 2019;135:729–44.CrossRefGoogle Scholar
  32. 32.
    Gill J, Singh J, Ohunakin OS, Adelekan DS. Exergy analysis of vapor compression refrigeration system using R450A as a replacement of R134a. J Therm Anal Calorim. 2019;136:857–72.  https://doi.org/10.1007/s10973-018-7675-z.CrossRefGoogle Scholar
  33. 33.
    Singh G, Singh PJ, Tyagi VV, Pandey AK. Thermal and exergoeconomic analysis of a dairy food processing plant. J Therm Anal Calorim. 2019;136:1365–82.  https://doi.org/10.1007/s10973-018-7781-y.CrossRefGoogle Scholar
  34. 34.
    Abraham JDAP, Mohanraj M. Thermodynamic performance of automobile air conditioners working with R430A as a drop-in substitute to R134a. J Therm Anal Calorim. 2019;136:2071–86.  https://doi.org/10.1007/s10973-018-7843-1.CrossRefGoogle Scholar
  35. 35.
    Çengel YA. Thermodynamics: an engineering approach. New York: McGraw-Hill; 2004.Google Scholar
  36. 36.
    Nasr M, Akhavan-Behabadi MA, Momenifar MR, Hanafizadeh P. Heat transfer characteristic of R-600a during flow boiling inside horizontal plain tube. Int Commun Heat Mass Transf. 2015;66:93–9.CrossRefGoogle Scholar
  37. 37.
    Momenifar MR, Akhavan-Behabadi MA, Nasr M, Hanafizadeh P. Effect of lubricating oil on flow boiling characteristics of R-600a/oil inside a horizontal smooth tube. Appl Therm Eng. Elsevier. 2015;91:62–72.Google Scholar

Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  1. 1.Department of Mechanical Engineering, Faculty of EngineeringShahid Chamran University of AhvazAhvazIran

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