The principle of Solar Chimney Power Plant SCPP is based on harvesting the thermal spectrum of solar radiation and converting it to mechanical energy by the means of a collector, a wind turbine and a chimney. In this work, a number of experiments were performed on a modified model made up of only one third of a circular collector area, facing south. Field data from selected clear, sunny days were recorded and studied. The analysis included; time-temperature relations for ambient, near chimney entry point and the collector periphery temperature, in addition to hourly solar radiation intensity and air velocity inside the chimney. The results show that for this geometry arrangement, the maximum temperature of air entering the chimney is achieved before the ambient temperature reaches its peak value. Velocity inside the chimney depends on the intensity of solar radiation and the temperature difference between the air temperature entering the chimney and the ambient temperature. Solar intensity, directly affects the temperature of air below the collector and a part of this energy is stored in the ground. Later, when the solar radiation is weak or not available, this energy can be utilized. Air velocity of 2.1m/s is obtained after the solar noon, when the solar intensity is 737 W/m2 and the maximum temperature difference is 11.2 °C. Due to the unique geometrical shape of the rig, a minor temperature loss of up to 1.3 °C occurs for the air near the center of the chimney.
Performance of a solar chimney with a modified collector geometry / A case study from Erbil, to the north of Iraq
Contributed by the Solar Energy Division of ASME for publication in the Journal of Solar Energy Engineering. Manuscript received January 26, 2019; final manuscript received June 29, 2019; published online xx xx, xxxx. Assoc. Editor: Ting Ma.
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Khidhir, D. K., and Atrooshi, S. A. (July 31, 2019). "Performance of a solar chimney with a modified collector geometry / A case study from Erbil, to the north of Iraq." ASME. J. Sol. Energy Eng. doi: https://doi.org/10.1115/1.4044371
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