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Solar energy desalination for arid coastal regions: development of a humidification–dehumidification seawater greenhouse
- Source :
-
Solar Energy . Nov2003, Vol. 75 Issue 5, p413. 7p. - Publication Year :
- 2003
-
Abstract
- The long-term aim of our research is to develop humidification–dehumidification desalination technology for farms in arid coastal regions that are suffering from salt-infected soils and shortages of potable groundwater. The specific aim of our current study was to determine the influence of greenhouse-related parameters on a process, called Seawater Greenhouse, which combines fresh water production with growth of crops in a greenhouse system. A thermodynamic model was used based on heat and mass balances. The dimension of the greenhouse had the greatest overall effect on the water production and energy consumption. A wide shallow greenhouse, 200 m wide by 50 m deep gave 125 m3 d−1 of fresh water. This was greater than a factor of two compared to the worst-case scenario with the same area (50 m wide by 200 m deep), which gave 58 m3 d−1. Low power consumption went hand-in-hand with high efficiency. The wide shallow greenhouse consumed 1.16 kW h m−3, while the narrow deep structure consumed 5.02 kW h m−3. Analysis of the local climate indicated that the structure should be built facing the NE direction. We are also in the process of building a commercial size Seawater Greenhouse at a site by the sea. The aim is to demonstrate the technology to local farmers and companies in the Arabian Gulf. The system will allow for the reclamation of salt-infected land by not relying, at all, on groundwater resources. [Copyright &y& Elsevier]
- Subjects :
- *RESEARCH
*FARM management
*SALINE water conversion
*SALINE waters
*GREENHOUSES
Subjects
Details
- Language :
- English
- ISSN :
- 0038092X
- Volume :
- 75
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Solar Energy
- Publication Type :
- Academic Journal
- Accession number :
- 11400229
- Full Text :
- https://doi.org/10.1016/j.solener.2003.07.007