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Essay / Parabolic Cell Solar Collector Technology (PSTC)
Many studies have been developed and carried out in terms of modeling Parabolic Cell Solar Collector Technology (PTSC). In the following, 13 research articles related to the present work are studied, analyzed and summarized. Yaghoubi [15] evaluated the heat loss in the heat collector field of a 250 KW solar power plant in Iran for several conditions. Experimental and numerical analyzes were carried out for comparison purposes. Three different tubes are used; vacuum, lost vacuum and broken glass, and an infrared (IR) camera is used to assess temperatures around the tube. The results showed that the vacuum tube (air) heat loss wasted is 40% higher than that of the vacuum tube, which reduces the collector efficiency by 3-5%. For broken glass, calculations have shown that thermal performance is reduced by 12 to 16%. Archer [16] developed a mathematical model of a parabolic collector used for solar cooling and heating using energy balance correlations between the absorber tube, glass tube, and surroundings. The proposed model is validated with experimental data in several operating cases which are HTF, direct normal solar radiation, wind speed and temperature. The results of the comparison between the mathematical model and experimental data indicate some differences, including high measured glass temperature and low measured efficiencies. These differences are attributed to heat loss at the media and connectors and the low absorption capacity assumption. Some recommendations have been suggested regarding the bellows fitting and the glass tube. Gong [16] conducted a theoretical and experimental study to evaluate the heat loss of a parabolic trough collector in China, Sanle3. First, the 1D model is developed...... middle of paper ...... eaten. In this model, the receiver is divided into several segments and heat transfer balance equations that depend on the collector type, optical properties, heat transfer fluid (HTF) and ambient conditions are applied for each segment. This leads to predicative temperatures, heat loss and heat gain from the parabolic trough. The results indicated that with the increase in the temperature of the absorber tube and heat transfer fluid (HTF), the heat loss from the parabolic collector increases and the heat gain also decreases. In this thesis, a 2D model was developed. The PTC is divided into several segments and heat balance correlations are applied for each segment of the trough. This model estimates the thermal performance of the entire system as well as the heat lost to the environment. Model validation was also carried out through preforming tests on the PTC.