Evaporation-Assisted Humidification–Dehumidification Cycles for Desalination Application in Tropical and Subtropical Regions
The present study aims to evaluate the performance of evaporation-assisted humidification–dehumidification (E-HDH) desalination, specifically direct evaporative (DE-HDH), indirect evaporative (IE-HDH), and Maisotsenko evaporative (ME-HDH) systems. To achieve this, a thermodynamic modeling approach i...
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| Format: | Article |
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MDPI AG
2023-03-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/15/6/1125 |
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| author | Maged Mohammed Nashi K. Alqahtani Hafiz M. Asfahan Muhammad Sultan |
| author_facet | Maged Mohammed Nashi K. Alqahtani Hafiz M. Asfahan Muhammad Sultan |
| author_sort | Maged Mohammed |
| collection | DOAJ |
| description | The present study aims to evaluate the performance of evaporation-assisted humidification–dehumidification (E-HDH) desalination, specifically direct evaporative (DE-HDH), indirect evaporative (IE-HDH), and Maisotsenko evaporative (ME-HDH) systems. To achieve this, a thermodynamic modeling approach is utilized, which incorporates the wet bulb effectiveness method, psychrometric relationships of humid air, and equations that govern heat and mass balance. The key performance indicators of the studied E-HDH desalination systems are estimated concerning operating parameters. The results show that the ME-HDH system is capable of producing a comparatively higher water production rate (WPR) ranging between 0.01 and 7.92 g/s as compared to the DE-HDH and IE-HDH systems. The sensible cooling flux was observed to be high at a dry-bulb temperature (T<sub>db</sub>) of 50 °C and relative humidity (RH) < 0.2, having a value of 5.26 kW for the DE-HDH system, followed by the ME-HDH system (3.23 kW) and the IE-HDH system (3.11 kW) due to relatively high mass flow rates. The latent heat flux was observed to be relatively high in the case of the ME-HDH system. Minimum specific energy consumption was observed from the ME-HDH system, and consequently, a maximum gain output ratio (3.32) was realized. In addition, the study realized that an increment in air velocity and wet bulb effectiveness significantly improves the WPR. In accordance with the climatic conditions of the studied Saudi Arabia cities, it has been realized that Al-Hofuf and Riyadh produce relatively high WPRs with minimum energy consumption. In the case of Al-Hofuf, the average WPR was recorded as 185.51 kg/day, followed by Riyadh (180.33 kg/day). The energy required was estimated to be 0.042 kWh/kg and 0.034 kWh/kg for both cities, accordingly. |
| first_indexed | 2024-03-11T05:46:11Z |
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| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-11T05:46:11Z |
| publishDate | 2023-03-01 |
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| record_format | Article |
| series | Water |
| spelling | doaj.art-d1837669db6e4705aeaebd1b1da684562023-11-17T14:26:49ZengMDPI AGWater2073-44412023-03-01156112510.3390/w15061125Evaporation-Assisted Humidification–Dehumidification Cycles for Desalination Application in Tropical and Subtropical RegionsMaged Mohammed0Nashi K. Alqahtani1Hafiz M. Asfahan2Muhammad Sultan3Date Palm Research Center of Excellence, King Faisal University, Al-Ahsa 31982, Saudi ArabiaDate Palm Research Center of Excellence, King Faisal University, Al-Ahsa 31982, Saudi ArabiaDepartment of Agricultural Engineering, Faculty of Agricultural Sciences & Technology, Bahauddin Zakariya University, Multan 60800, PakistanDepartment of Agricultural Engineering, Faculty of Agricultural Sciences & Technology, Bahauddin Zakariya University, Multan 60800, PakistanThe present study aims to evaluate the performance of evaporation-assisted humidification–dehumidification (E-HDH) desalination, specifically direct evaporative (DE-HDH), indirect evaporative (IE-HDH), and Maisotsenko evaporative (ME-HDH) systems. To achieve this, a thermodynamic modeling approach is utilized, which incorporates the wet bulb effectiveness method, psychrometric relationships of humid air, and equations that govern heat and mass balance. The key performance indicators of the studied E-HDH desalination systems are estimated concerning operating parameters. The results show that the ME-HDH system is capable of producing a comparatively higher water production rate (WPR) ranging between 0.01 and 7.92 g/s as compared to the DE-HDH and IE-HDH systems. The sensible cooling flux was observed to be high at a dry-bulb temperature (T<sub>db</sub>) of 50 °C and relative humidity (RH) < 0.2, having a value of 5.26 kW for the DE-HDH system, followed by the ME-HDH system (3.23 kW) and the IE-HDH system (3.11 kW) due to relatively high mass flow rates. The latent heat flux was observed to be relatively high in the case of the ME-HDH system. Minimum specific energy consumption was observed from the ME-HDH system, and consequently, a maximum gain output ratio (3.32) was realized. In addition, the study realized that an increment in air velocity and wet bulb effectiveness significantly improves the WPR. In accordance with the climatic conditions of the studied Saudi Arabia cities, it has been realized that Al-Hofuf and Riyadh produce relatively high WPRs with minimum energy consumption. In the case of Al-Hofuf, the average WPR was recorded as 185.51 kg/day, followed by Riyadh (180.33 kg/day). The energy required was estimated to be 0.042 kWh/kg and 0.034 kWh/kg for both cities, accordingly.https://www.mdpi.com/2073-4441/15/6/1125direct evaporativeindirect evaporativeMaisotsenko evaporativehumidification–dehumidificationdesalinationKöppen–Geiger climatic classifications |
| spellingShingle | Maged Mohammed Nashi K. Alqahtani Hafiz M. Asfahan Muhammad Sultan Evaporation-Assisted Humidification–Dehumidification Cycles for Desalination Application in Tropical and Subtropical Regions Water direct evaporative indirect evaporative Maisotsenko evaporative humidification–dehumidification desalination Köppen–Geiger climatic classifications |
| title | Evaporation-Assisted Humidification–Dehumidification Cycles for Desalination Application in Tropical and Subtropical Regions |
| title_full | Evaporation-Assisted Humidification–Dehumidification Cycles for Desalination Application in Tropical and Subtropical Regions |
| title_fullStr | Evaporation-Assisted Humidification–Dehumidification Cycles for Desalination Application in Tropical and Subtropical Regions |
| title_full_unstemmed | Evaporation-Assisted Humidification–Dehumidification Cycles for Desalination Application in Tropical and Subtropical Regions |
| title_short | Evaporation-Assisted Humidification–Dehumidification Cycles for Desalination Application in Tropical and Subtropical Regions |
| title_sort | evaporation assisted humidification dehumidification cycles for desalination application in tropical and subtropical regions |
| topic | direct evaporative indirect evaporative Maisotsenko evaporative humidification–dehumidification desalination Köppen–Geiger climatic classifications |
| url | https://www.mdpi.com/2073-4441/15/6/1125 |
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