List of Articles Solar desalination

• Open Access Article
  • Abstract Page
  • Full-Text
  
  1 - Effect of Leakage Modification and Cooling Flow Rate Increase of Water-Cooled Condenser on NVD System Performance Equipped with Vacuum Tube Collectors
  Mohammad Javad Abbaspour mohammad behshad Shafiei
  10.22034/jest.2020.42685.4577
  Background and Objective: Lack of access to sufficient fresh water is a major threat to people around the world, and to prevent this, extensive research is being done to find new ways to purify different sources of brackish water at lower cost, energy and environmental More

  Background and Objective: Lack of access to sufficient fresh water is a major threat to people around the world, and to prevent this, extensive research is being done to find new ways to purify different sources of brackish water at lower cost, energy and environmental impacts. The purpose of this study is to produce the freshwater through an NVD system using vacuum tube collectors and vacuum creation by a vacuum pump. Hence, this kind of system could be considered as an innovative combination one; in addition, the effect of different vacuum pressures on yield, then the effect of leakage modification and flow rate increase of cooling water on the system performance were experimentally investigated. Method: In this research, a vacuum pump was utilized to create an initial vacuum, and when it is switched off, a barometric water column maintains the vacuum naturally throughout the consecutive days. The vacuum collectors were used in order to enhance the saline water heat transfer; later the system performance was continually examined. After the improvements were carried to the system, the yield and efficiency were analyzed and compared with the first test. Furthermore, a pressure gauge, a pyranometer and some thermocouples were applied so as to measure the system pressure, solar radiation and temperatures respectively. Findings: The current study found that the yield and efficiency of the system increased by raising the vacuum pressure; besides, after the leakage modification and cooling water flow rate enhancement, the efficiency has been insignificantly varied in the first consecutive days resulting in a superior capability to produce fresh water for more than three days without reusing the vacuum pump. Discussion and Conclusion: The results of this study indicated that raising the vacuum pressure increased the yield and efficiency so that they reached to 8.114 kg/m2d and more than 51% respectively. Moreover, the efficiency slightly varied and as a result, the system would be able to produce freshwater for more than three days without reutilizing vacuum pump. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  2 - Review of research in Exergy analysis and energy of solar water desalination
  غلامرضا خسروی هادی کارگر شریف آباد
  In this paper disburse exergy analyse and energy analyse per use from the exiting model at some of solar stills and mechanism of on solar still constituent glass cover,collector(absorber sun energy),inlet brine water and sump survey by exergy analysis. also exerjy and e More

  In this paper disburse exergy analyse and energy analyse per use from the exiting model at some of solar stills and mechanism of on solar still constituent glass cover,collector(absorber sun energy),inlet brine water and sump survey by exergy analysis. also exerjy and energy balance reffered from the other parts of solar still. And express dominant relations.also styles improvement efficiency at other parameters at solar stills by sevral styles taken from exergy and enerjy described and results will represent. Finally we will try with a short comparsion recognized ineffective portion in the solar stills and explain ways to improve efficiency. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  3 - Construction and Experimental Investigation of local cooling to improve the efficiency of solar desalination
  مهدی آریافر Hadi Kargar Sharifabad
  Due to the favorable properties of wide regions of the world and has developed a shortage of fresh water in dry areas that already face large-scale development has occurred Such as parts of North Africa and the Middle East, to produce fresh water by desalination to need More

  Due to the favorable properties of wide regions of the world and has developed a shortage of fresh water in dry areas that already face large-scale development has occurred Such as parts of North Africa and the Middle East, to produce fresh water by desalination to need a lot of energy and a lot of research studies for the development of solar desalination is being done by solar energy With the aim of identifying key technical challenges and potential opportunities for solar energy, A variety of technologies for the optimum amount of solar energy as well as various technologies for solar desalination system includes advanced technique for restoring energy is studied we conclude that the development of solar desalination system for cost-effective and energy-efficient in the near future may be grounds for water supply desert regions of the world. The effects of water cooling with two modes: simple desalination (passive) by installing cooling and desalination of water (active) examined and compared in terms of daily production has been tested. Tests in August (August) in geographical coordinates (N:35°34′,E:53°22′) carried on the basis of the results observed maximum production rate freshwater disabled 0.26 (kg / m2) per hour. Moreover, the daily output disable mode of 1.035 (kg / m2.day) daily 1.530 (kg / m2) reached in active mode. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  4 - Construction and Experimental Investigation of heat pipe and water cooling application to improve the efficiency of solar desalination
  Hadi Kargar Sharifabad مهدی آریافر
  Healthy and fresh water supply is one of the fundamental issues in different regions of the world, particularly in remote areas is dry. There are several methods for desalination of brackish waters, of which solar distillation devices can be the perfect solution for spa More

  Healthy and fresh water supply is one of the fundamental issues in different regions of the world, particularly in remote areas is dry. There are several methods for desalination of brackish waters, of which solar distillation devices can be the perfect solution for sparsely populated areas that are of sufficient intensity solar radiation. In this study, we have tried to express the necessity of providing safe drinking water, the fundamentals of performance of solar desalination dealt with the resources available. In the present study the effect of water cooling with two modes: Desalination with heat pipe and manifold (semi-active) and desalination to cooling water and heat Vlvlhhay manifold (active mode) are tested daily production was investigated. Tests in August (September) in geographical coordinates(N:35°34′,E:53°22′)is conducted. Based on the results observed The maximum rate of production of fresh water in active mode 0.43(kg / m2) per hour. As well as the daily yield semi-active mode from 1.87 (kg / m2.day) daily 2.085(kg / m2) reached in active mode. Manuscript profile