Economic Analysis in Series-Distillation Desalination
The ability to produce potable water economically is the primary purpose of seawater desalination research. Reverse osmosis (RO) and multi-stage flash (MSF) cost more than potable water produced from fresh water resources. Therefore, this research investigates a high-efficiency mechanical vapor-comp...
Saved in:
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Universitas Syiah Kuala, Chemical Engineering Department
2010-06-01
|
| Series: | Jurnal Rekayasa Kimia & Lingkungan |
| Online Access: | https://jurnal.usk.ac.id/RKL/article/view/216 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1839629816282742784 |
|---|---|
| author | Mirna Rahmah Lubis |
| author_facet | Mirna Rahmah Lubis |
| author_sort | Mirna Rahmah Lubis |
| collection | DOAJ |
| description | The ability to produce potable water economically is the primary purpose of seawater desalination research. Reverse osmosis (RO) and multi-stage flash (MSF) cost more than potable water produced from fresh water resources. Therefore, this research investigates a high-efficiency mechanical vapor-compression distillation system that employs an improved water flow arrangement. The incoming salt concentration was 0.15% salt for brackish water and 3.5% salt for seawater, whereas the outgoing salt concentration was 1.5% and 7%, respectively. Distillation was performed at 439 K and 722 kPa for both brackish water feed and seawater feed. Water costs of the various conditions were calculated for brackish water and seawater feeds using optimum conditions considered as 25 and 20 stages, respectively. For brackish water at a temperature difference of 0.96 K, the energy requirement is 2.0 kWh/m3. At this condition, the estimated water cost is $0.39/m3 achieved with 10,000,000 gal/day distillate, 30-year bond, 5% interest rate, and $0.05/kWh electricity. For seawater at a temperature difference of 0.44 K, the energy requirement is 3.97 kWh/m3 and the estimated water cost is $0.61/m3. Greater efficiency of the vapor compression system is achieved by connecting multiple evaporators in series, rather than the traditional parallel arrangement. The efficiency results from the gradual increase of salinity in each stage of the series arrangement in comparison to parallel. Calculations using various temperature differences between boiling brine and condensing steam show the series arrangement has the greatest improvement at lower temperature differences.
Keywords: desalination, dropwise condensation, mechanical-vapor compression |
| format | Article |
| id | doaj-art-c3d1f6e629c84d99bbb484f4acf9b57d |
| institution | Matheson Library |
| issn | 1412-5064 2356-1661 |
| language | English |
| publishDate | 2010-06-01 |
| publisher | Universitas Syiah Kuala, Chemical Engineering Department |
| record_format | Article |
| series | Jurnal Rekayasa Kimia & Lingkungan |
| spelling | doaj-art-c3d1f6e629c84d99bbb484f4acf9b57d2025-07-14T18:59:53ZengUniversitas Syiah Kuala, Chemical Engineering DepartmentJurnal Rekayasa Kimia & Lingkungan1412-50642356-16612010-06-0173211Economic Analysis in Series-Distillation DesalinationMirna Rahmah Lubis0Jurusan Teknik Kimia, Fakultas Teknik, Universitas Syiah KualaThe ability to produce potable water economically is the primary purpose of seawater desalination research. Reverse osmosis (RO) and multi-stage flash (MSF) cost more than potable water produced from fresh water resources. Therefore, this research investigates a high-efficiency mechanical vapor-compression distillation system that employs an improved water flow arrangement. The incoming salt concentration was 0.15% salt for brackish water and 3.5% salt for seawater, whereas the outgoing salt concentration was 1.5% and 7%, respectively. Distillation was performed at 439 K and 722 kPa for both brackish water feed and seawater feed. Water costs of the various conditions were calculated for brackish water and seawater feeds using optimum conditions considered as 25 and 20 stages, respectively. For brackish water at a temperature difference of 0.96 K, the energy requirement is 2.0 kWh/m3. At this condition, the estimated water cost is $0.39/m3 achieved with 10,000,000 gal/day distillate, 30-year bond, 5% interest rate, and $0.05/kWh electricity. For seawater at a temperature difference of 0.44 K, the energy requirement is 3.97 kWh/m3 and the estimated water cost is $0.61/m3. Greater efficiency of the vapor compression system is achieved by connecting multiple evaporators in series, rather than the traditional parallel arrangement. The efficiency results from the gradual increase of salinity in each stage of the series arrangement in comparison to parallel. Calculations using various temperature differences between boiling brine and condensing steam show the series arrangement has the greatest improvement at lower temperature differences. Keywords: desalination, dropwise condensation, mechanical-vapor compressionhttps://jurnal.usk.ac.id/RKL/article/view/216 |
| spellingShingle | Mirna Rahmah Lubis Economic Analysis in Series-Distillation Desalination Jurnal Rekayasa Kimia & Lingkungan |
| title | Economic Analysis in Series-Distillation Desalination |
| title_full | Economic Analysis in Series-Distillation Desalination |
| title_fullStr | Economic Analysis in Series-Distillation Desalination |
| title_full_unstemmed | Economic Analysis in Series-Distillation Desalination |
| title_short | Economic Analysis in Series-Distillation Desalination |
| title_sort | economic analysis in series distillation desalination |
| url | https://jurnal.usk.ac.id/RKL/article/view/216 |
| work_keys_str_mv | AT mirnarahmahlubis economicanalysisinseriesdistillationdesalination |