Performance of Hybrid Solar- Gas Turbine Power plants modified with Humidification-Dehumidification Desalination process

Document Type : Original Article

Authors

1 Department of Mechanics, Electrical Power and Computer, Science and Research Branch, Islamic Azad University, Tehran, Iran

2 Department of Aerospace Engineering, K. N. Toosi University of Technology, Tehran, Iran

Abstract

In this research and for the first time, the performance of hybrid solar-gas turbine power plants modified with humidification-dehumidification (HD) desalination process was simulated with TRNSYS. The system included a 4.6 MW gas turbine, solar tower and HD process with air heater and open cycle for water and air. The results showed that in the hybrid solar-gas turbine power plants, the solar power supplied about the 35-45% of required energy and the amount of fossil fuel consumption was reduced. Also, the emission of CO2 was declined for about 40%. The electric power and efficiency of hybrid system was slightly lower than gas turbine only due to the pressure losses in piping and receiver of solar system. The results of HD desalination indicated that the increase in the temperature and relative humidity of the inlet air increased the amount of fresh water production and increase in the temperature of inlet saline water declined its production. Moreover, the amount of fresh water production had an optimum value respect to the mass flow rate of air and with increasing the air flow, the amount of fresh water production increased and then decreased. In addition, if the mass flow rate ratio of saline water to dry air was equal to 1.8, the gain output ratio (GOR) had a maximum value of 2. Variation of GOR in terms of returned air at different inlet air temperatures was explained.

Keywords

References

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Journal of Renewable and New Energy
Volume 9, Issue 2 - Serial Number 18
September 2022
Pages 46-56

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History

  • Receive Date: 04 July 2021
  • Revise Date: 22 August 2021
  • Accept Date: 31 August 2021

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