Journal
SUSTAINABILITY
Volume 15, Issue 17, Pages -Publisher
MDPI
DOI: 10.3390/su151713222
Keywords
trigeneration; green energy; biogas; geothermal cycle; HDH desalination
Ask authors/readers for more resources
This paper proposes a sustainable system that utilizes geothermal energy and biogas as replacements for fossil fuels, and combines them with other power cycles. The system can produce renewable energy, freshwater, and heat.
With rising electricity demand and environmental concerns, renewable energy is increasingly important. Geothermal power plants offer an opportunity to utilize natural energy sources advantageously. These systems can be coupled with other power cycles, like gas Brayton cycles, to maximize their potential output. Biogas is considered a viable replacement for fossil fuels such as natural gas to further mitigate pollutant gas emissions. In this paper, a biogas-fueled gas turbine coupled with a double-expansion geothermal cycle is proposed that uses, for heat recovery, combustion product gases to run a Kalina cycle. After heating the geothermal fluid twice for double expansion, the product hot gases also heat water in a domestic water heater. Also, three thermoelectric generators are utilized to increase the overall output. Using the geothermal cycle's waste heat, a humidifier-dehumidifier desalination unit is considered for freshwater production. Green energy, freshwater, and heat are the system's products, all of which are useful. The proposed system is examined from a thermodynamic perspective using EES V.10.561 (Engineering Equation Solver) software. For the considered input parameters, energy and exergy efficiencies of 36% and 44% are achieved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available