TY - JOUR T1 - Exergoeconomic Analysis of a Heating and Power Generation Solar System for Using at the Engineering Faculty of Urmia University TT - تحلیل اگزرژی‌اقتصادی یک سیستم تولید توان و گرمایش خورشیدی برای استفاده در دانشکده فنی و مهندسی دانشگاه ارومیه JF - mdrsjrns JO - mdrsjrns VL - 19 IS - 2 UR - http://mme.modares.ac.ir/article-15-23994-en.html Y1 - 2019 SP - 415 EP - 427 KW - Exergoeconomic analysis KW - Parabolic trough solar collectors KW - Engineering faculty of Urmia University KW - Heating generationm KW - Power generation N2 - In this paper, a study from the perspective of exergy and cost in the framework of exergoeconomic analysis of a heating and power generation system with parabolic trough solar collectors was carried out as a case study to be used at the engineering faculty of Urmia University. The system consists of a solar subsystem with an Organic Rankine Cycle (ORC). This study is based on three different solar radiation modes during a day, including solar mode, solar and storage mode, and storage mode. In the first mode, the solar flux is at a low level and there is no energy storage. In the second mode, there is energy storage in addition to running the ORC by collectors. In the third mode, only storage tank is used. Paying attention to the actual energy demand of the location and the analysis according to the variable solar radiation are the important points of this study. Due to the weather conditions prevailing on the building, its heating load is 1253.2kW. Also, the electric power required is about 1500kW. Exergoeconomic analysis is based on three important design parameters, including the number of the day through the year, ORC pump input temperature, and ORC turbine inlet pressure examined. The results indicate that in a cold day, the cost per unit of exergy in the three mentioned modes are about 19$/GJ, 16$/GJ, and 20$/GJ, respectively. Also, the highest exergy destruction rate occurs in parabolic trough solar collectors and ORC evaporators. M3 ER -