The Operation of Parabolic Trough Solar Power Plant at Variable Partial Loads in Palmyra City

Solar radiation which reaches the earth surface in Palmyra city has high rates, so we introduce this research to study the operation of a solar electric power plant with parabolic trough solar collector type. Electric power plants are usually designed to operate at nominal design power and flow rate, pressure, specific steam temperature. In this case the obtained efficiency is relatively high, but the real conditions in which the plant operates and supplies the electric grid, in addition to the climate variations during monthes and seasons, all lead to a deviation in power value from nominal value, so the plant operate at partial loads. We used the analytical method in this research to study the variation in power plant parameters as the steam turbine load changes. In other words, the study of main plant parameters variation due to variable partial loads. We calculated steam pressure variations through turbine stages and its effect on changing steam flow rate to the recovery water heaters. In addition, we calculated the amount of heat consumed through turbine unit, turbine unit efficiency, and the total efficiency of the power plant.

Employing a Parabolic Trough Solar Power Plant with a Sensible Thermal Energy Storage for Covering Electrical Peak Load in Palmyra

This research shows the necessity of building the solar electric generating system to provide a clean renewable energy and to meet people's needs of electrical energy at Peak-Load to keep a clean environment in Palmyra region. This paper concluded a study of electric generating power plant with 30 MW capacity during day. A part of heat power collected in a solar field is stored in sensible thermal energy storage for covering Electrical Peak Load when the plant operates at night. This research showed the advantage of constructing the solar system with a Parabolic Trough in the solar field. The amount of heat collected during months of the year is high and the hours operating at daytime were great. The building of solar-electric plant is valid technically and economically. This research performed a design of solar field and its Parameters using Computer Program (Language C++) and calculated the most important plant performance during months of the year.