Energy and Exergy Analysis for Single Slope Passive Solar Still with Different Water Depth Located in Baghdad Center
In the present experimental work, the energy and exergy for single slope passive solar still with different basin water depths are experimentally investigated under the Baghdad climate condition. The analysis is performed using the governing equations formulated according to the first and second law...
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MDPI AG
2022-08-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/17/8561 |
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| author | Hayder Q. A. Khafaji Hasanain A. Abdul Wahhab Wisam Abed Kattea Al-Maliki Falah Alobaid Bernd Epple |
| author_facet | Hayder Q. A. Khafaji Hasanain A. Abdul Wahhab Wisam Abed Kattea Al-Maliki Falah Alobaid Bernd Epple |
| author_sort | Hayder Q. A. Khafaji |
| collection | DOAJ |
| description | In the present experimental work, the energy and exergy for single slope passive solar still with different basin water depths are experimentally investigated under the Baghdad climate condition. The analysis is performed using the governing equations formulated according to the first and second laws of thermodynamics. Compared to solar still with 1 cm water depth, the obtained results indicated that raising the water depth to 2 and 3 cm caused an appreciable drop in water basin temperature, and high levels of water basin reduction were about 4% and 9%, respectively, from 8:00 a.m. to 14:00 p.m., which significantly affects heat and mass transfer and ultimately hinders further water productivity. The maximum evaporation and convection heat transfer coefficients are found (32 W/m<sup>2</sup>·k) and (2.62 W/m<sup>2</sup>·k), respectively, while the maximum productivity of solar still is found to be 1468.84 mL/m<sup>2</sup> with 1 cm water depth. Conversely, stills with 2 and 3 cm water depth, exhibit an increment of the daily exergy efficiency after 14:00 p.m., this increment was the most for the still with 3 cm water depth. Therefore, we have concluded that the still with 1 cm of water depth attained the highest water productivity, while the still with 3 cm of water depth attained the best exergy efficiency with no additional costs. |
| first_indexed | 2024-03-10T03:03:45Z |
| format | Article |
| id | doaj.art-73ae9e42bb8445faaff11ec19b121f0f |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T03:03:45Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-73ae9e42bb8445faaff11ec19b121f0f2023-11-23T12:41:44ZengMDPI AGApplied Sciences2076-34172022-08-011217856110.3390/app12178561Energy and Exergy Analysis for Single Slope Passive Solar Still with Different Water Depth Located in Baghdad CenterHayder Q. A. Khafaji0Hasanain A. Abdul Wahhab1Wisam Abed Kattea Al-Maliki2Falah Alobaid3Bernd Epple4Department of Electromechanical Engineering, University of Technology-Iraq, Ministry of Higher Education & Scientific Research, Baghdad 10066, IraqEnergy and Renewable Energies Technology Center, University of Technology-Iraq, Ministry of Higher Education & Scientific Research, Baghdad 10066, IraqMechanical Engineering Department, University of Technology-Iraq, Ministry of Higher Education & Scientific Research, Baghdad 10066, IraqInstitut Energiesysteme und Energietechnik, TU Darmstadt, Otto-Berndt-Straße 2, 64287 Darmstadt, GermanyInstitut Energiesysteme und Energietechnik, TU Darmstadt, Otto-Berndt-Straße 2, 64287 Darmstadt, GermanyIn the present experimental work, the energy and exergy for single slope passive solar still with different basin water depths are experimentally investigated under the Baghdad climate condition. The analysis is performed using the governing equations formulated according to the first and second laws of thermodynamics. Compared to solar still with 1 cm water depth, the obtained results indicated that raising the water depth to 2 and 3 cm caused an appreciable drop in water basin temperature, and high levels of water basin reduction were about 4% and 9%, respectively, from 8:00 a.m. to 14:00 p.m., which significantly affects heat and mass transfer and ultimately hinders further water productivity. The maximum evaporation and convection heat transfer coefficients are found (32 W/m<sup>2</sup>·k) and (2.62 W/m<sup>2</sup>·k), respectively, while the maximum productivity of solar still is found to be 1468.84 mL/m<sup>2</sup> with 1 cm water depth. Conversely, stills with 2 and 3 cm water depth, exhibit an increment of the daily exergy efficiency after 14:00 p.m., this increment was the most for the still with 3 cm water depth. Therefore, we have concluded that the still with 1 cm of water depth attained the highest water productivity, while the still with 3 cm of water depth attained the best exergy efficiency with no additional costs.https://www.mdpi.com/2076-3417/12/17/8561energy analysisexergy efficiencysolar stillwater depthwater productivity |
| spellingShingle | Hayder Q. A. Khafaji Hasanain A. Abdul Wahhab Wisam Abed Kattea Al-Maliki Falah Alobaid Bernd Epple Energy and Exergy Analysis for Single Slope Passive Solar Still with Different Water Depth Located in Baghdad Center Applied Sciences energy analysis exergy efficiency solar still water depth water productivity |
| title | Energy and Exergy Analysis for Single Slope Passive Solar Still with Different Water Depth Located in Baghdad Center |
| title_full | Energy and Exergy Analysis for Single Slope Passive Solar Still with Different Water Depth Located in Baghdad Center |
| title_fullStr | Energy and Exergy Analysis for Single Slope Passive Solar Still with Different Water Depth Located in Baghdad Center |
| title_full_unstemmed | Energy and Exergy Analysis for Single Slope Passive Solar Still with Different Water Depth Located in Baghdad Center |
| title_short | Energy and Exergy Analysis for Single Slope Passive Solar Still with Different Water Depth Located in Baghdad Center |
| title_sort | energy and exergy analysis for single slope passive solar still with different water depth located in baghdad center |
| topic | energy analysis exergy efficiency solar still water depth water productivity |
| url | https://www.mdpi.com/2076-3417/12/17/8561 |
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