Many studies have been developed and conducted in terms of modeling parabolic solar collector (PTSC) technology. Below, 13 research documents related to this 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 different conditions. Experimental and numerical analyzes were carried out for comparison. Three different tubes are used; vacuum, lost vacuum and broken glass, while an infrared (IR) camera is used to assess temperatures around the tube. The results showed that the heat loss of the vacuum tube lost (air) is 40% higher than the vacuum tube, so the collector efficiency is reduced by 3-5%. For broken glass, calculations showed that the thermal performance is reduced by 12-16%. Archer [16] developed a mathematical model of a parabolic trough used for solar cooling and heating using energy balance correlations between the absorber tube, the glass tube, and surroundings. The proposed model is validated with experimental data in different operational cases which are HTF, normal direct solar radiation, wind speed and temperature. The results of the comparison between the mathematical model and the experimental data indicate some differences including the high measured glass temperature and the low measured efficiencies. These differences are attributed to heat loss in the mounts and connectors and low power consumption. Some recommendations regarding bellows connection and glass tube have been suggested. Gong [16] conducted a theoretical and experimental study to evaluate the heat loss of downstream parabolic trough collector in China, Sanle3. First, the 1-D model is developed... halfway through the paper... eaten. In this model, the receiver is divided into several segments, and for each segment, heat transfer balance equations are applied which are based on the collector type, optical properties, heat transfer fluid (HTF), and environmental conditions. This leads to predicted temperatures, heat loss and heat gain of the parabolic trough. The results indicated that as the temperature of the absorber tube and heat transfer fluid (HTF) increases, the heat loss of the parabolic trough increases and the heat gain also decreases. In this thesis a 2-D 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 and the heat lost to the environment. The validation of the model was also carried out by carrying out tests on the PTC.