The master’s thesis submitted by the student Golan Aziz Bakr at the Technical Engineering College of Kirkuk (a practical study to improve the performance of a solar distiller using solar collectors) was researched.
The letter dealt with:
A study on the development of a new solar system to improve the performance of the double-slope solar distiller by taking advantage of the solar heater and the solar concentrator to increase the heating of the salt water inside the solar distiller basin. A heat exchanger was used to facilitate heat transfer between the solar system and the water in the still-water basin. Water is heated inside the solar still using three values of water flow inside the heat exchanger (L/min 1.4,1.7,2). This was done by conducting several tests, including first: the first test (M1) (heater + concentrate + distiller), second: the second test (M2) (concentrator + distiller), third: the third test (M3) (heater + distiller) and each test includes insulation Basin and without, in addition to the traditional drip basin. Fourth: The fourth test (M4): The same as the first test, but by cooling the surface of the glass and isolating the basin of the improved distiller, and showing its effect on performance. All tests were 5cm deep water in the tub.
The purpose of the message:
Improving the performance of a solar distiller integrated with two types of solar collectors and comparing it with a conventional solar distiller under Iraqi environmental conditions.
Studying the effect of the heater or the concentrator (separately) on the overall performance of the solar still.
Calculate the productivity and efficiency of both distillers and compare the results.
Study the effect of adding a heat exchanger inside the still.
Study the effect of flow and weather conditions on the performance of distillers.
The researcher concluded:
The results showed that the amount of water flowing into the exchanger has a positive effect on the performance for all test cases, that is, the temperature of the brine water and the performance of the distilled water are as large as possible when the flow is (2L/min). The productivity of distillers is also directly proportional to the temperature of the saltwater in the distillation basin, while it is inversely proportional to the temperature of the surface of the glass. And the process of connecting the heater and the center, respectively, with the solar distiller, enhances the productivity of the distiller to raise the temperature of the saltwater in the distiller basin and doubles the productivity of the distillation provided that the surface of the glass is cooled. And also the possibility of benefiting from the heat stored in the heater in the production of distilled water for late hours at night. It was concluded that the fourth test (M4) is the best of the four studied tests in terms of productivity and efficiency, followed by the first test, then the third test, and then the second test (here the comparison is in the case of the isolated improved distillate only), as the total productivity (for a full day) for the fourth test (M4) It was higher than the first test (M1), the third (M3), and the second (M2) by rates of 78.9%, 127%, and 210%, respectively, and the productivity of the improved still is higher than the productivity of the traditional distillate in all studied cases. It was also concluded that the night productivity of the still can save 25% of the total productivity due to the heat stored in the system.
The discussion committee consisted of the following gentlemen:
1- Prof. Dr. Atallah Hussein Jassim, Chairman
2- Assistant Professor Ahmed Mustafa Salem, member
3- The teacher, Dr. Hussein Haider Muhammad Ali, a member
4- Prof. Dr. Omar Khalil Ahmed, member, and first supervisor
5- Mr. Ahmed Hassan Ahmed, member, and second supervisor