On a thermodynamically-balanced humidification-dehumidification desalination system driven by a vapor-absorption heat pump

Muhammad H. Elbassoussi, M. A. Ahmed, Syed M. Zubair*, Naef A.A. Qasem

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

A novel hybrid system consists of an efficient humidification-dehumidification (HDH) desalination unit driven by an absorption (AB) heat pump. A thermodynamically-balanced HDH unit with multiple air extractions is used, while single- and double-effect absorption (SEAB and DEAB, respectively) heat pumps are considered. The proposed systems are examined for simultaneous production of desalinated water and cooling effect under a fixed cooling load of 5 kW. As observed, the SEAB-HDH unit can produce up to 152.4 kg/h of desalinated water at a GOR value of around 10, for 0.002–0.0058 $/l. While the DEAB-HDH system delivers water of up to 135.4 kg/h for 0.0026–0.0098 $/l, at a GOR value approaching 15. Besides, COP values of about 0.50 and 0.81 are recorded for the SEAB- and the DEAB-HDH systems, respectively. It is noted that the DEAB-HDH system always supersedes the SEAB-HDH system in both GOR and COP values. An enhancement of over 100% in the GOR value is observed when air extraction is applied. Also, it is noted that single and double extractions improve water production by about 110 and 90%, respectively. A jump of nearly 500% is recorded in the water production when the cooling capacity increases from 2 to 15 kW. This jump is accompanied by a rise of 60 and 80% in the GOR and COP values, respectively. Finally, the theoretical GOR limit of the proposed systems is estimated.

Original languageEnglish
Article number114142
JournalEnergy Conversion and Management
Volume238
DOIs
StatePublished - 15 Jun 2021

Bibliographical note

Publisher Copyright:
© 2021 Elsevier Ltd

Keywords

  • Absorption
  • Cooling
  • Desalination
  • Extraction
  • Humidification-dehumidification
  • Thermodynamic balancing

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology

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