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Design, Manufacture and Study of a Desalination System with Heat Pipe and PTC

Jafari Mosleh, Hassan | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45607 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Behshad Shafii, Mohammad
  7. Abstract:
  8. According to studies on solar stills, there has been designed an industrial solar still with a linear parabolic through collector (PTC) having higher efficiency than similar systems. Linear PTC coupled with heat pipe is very effective for increasing the efficiency of solar still. This system includes a parabolic trough collector functions by focusing the sunlight on a heat pipe and absorption of heat by a heat pipe. To minimize heat loss, heat pipe is embedded in an evacuated tube collector. By absorbing the heat, the working fluid of the heat pipe (ethanol) will be evaporated and due to its reduced density, it moves upwards and attains to the condenser. The external part of the condenser is located in a container contacting with water and working fluid of the heat pipe conducts its heat to the water and makes it boiling. Vapor moves upwards and will be condensed in next part. Thus salts and minerals are removed from saline water.
    An automatic system has been designed for filling and emptying water container. This system also equipped to a sun tracking system and tracking sun movement to increase the energy received.
    Performance of system has been tested under different conditions. During test, related standards were used. There were conducted some tests including time constant tests, acceptable angle, performance of system for producing fresh water in different volumes of inlet water, performance of system for a state that evacuated tube has been filled by oil and or water.
    By conducting given tests, the acceptable angle for collector was obtained about 5 degrees and time constant is also 70s. The efficiency maximized in the volume of 150ml and by adding oil in the heat pipe, it considerably increased the efficiency and production rate.
  9. Keywords:
  10. Heat Pipe ; Desalination ; Time Constant ; Parabolic Collector ; Acceptance Angle

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