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Experimental Investigation of a Multi-Purpose Energy System Composed of Pulsating Heat Pipe, Solar Collector and PCM

Kavoosi-Balootaki, Hassan | 2017

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  1. Type of Document: Ph.D. Dissertation
  2. Language: English
  3. Document No: 50281 (58)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Saeedi, Mohammad Hassan
  7. Abstract:
  8. In solar systems, the required space and cost, the impossibility of continuous access to energy, energy storage and optimal use of the received energy are the basic parameters and issues. Therefore, with the knowledge of these cases, proposing ideas and approaches to study the possibility of reducing the above mentioned issues are of the main objectives of this research. In solar thermal systems and solar electrical systems, the collector and photovoltaic panels are the main components, respectively. However, the studies show that there are issues regarding the existing collectors and photovoltaic panels, e.g. the flat-plate type which is most used in solar systems, and the basis is not provided for achieving the aforementioned objectives. But, since designing a solar system for public acceptance always deals with obtaining energy with the minimum required cost and space, optimal design of the collector as the main component of solar systems is a main parameter. Therefore, to do so, the idea of hybrid multipurpose collectors was first proposed; and designing and manufacturing combined multipurpose vacuum collectors (CMPVC) with the capability of heat transfer to two operating fluids considering all of the geometric and process parameters were carried out. In the next step, the performance of the multipurpose vacuum collector was studied under different cases according to the existing standards in Izeh County. The obtained results showed that the multipurpose collector led to 43% reduced cost and 50% reduced required space compared to two similar separated collectors. The hybrid multipurpose collector has the highest efficiency and useful energy obtained compared to separated collectors. In multipurpose collectors, unlike the existing collectors, the concurrency of both main parameter i.e. high temperature and high efficiency is possible. Multipurpose collectors allows the simultaneous operation of solar systems and energy storage such that by utilizing phase-change materials technology, one could exploit this capability of multipurpose collectors considering the needs of the user. In general, the results showed that the idea of multipurpose collectors provides the basis for achieving the objectives of the study with the minimum cost and required space. Finally, in the form of another innovative work, the design for a hybrid multipurpose collector is carried out for the cogeneration of power and solar heating, which could be introduced as a pseudo-microsystem for solar cogeneration, and its performance is studied for the sake of a final conclusion. Therefore, designing and manufacturing hybrid multipurpose collectors creates a novel attitude in the field of using solar energy and collectors, such that the aforementioned advantages and other environmental advantages make the hybrid multipurpose collector to seem a practical and economic plan
  9. Keywords:
  10. Pulsating Heat Pipe ; Phase Change Material (PCMs) ; Hybrid System ; Collectors ; Photovoltaic-Thermal System ; Multipurpose System

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