Simultaneous sequestration and extraction of geothermal energy using CO2 from an IGCC plant as a heat transfer fluid for power generation from EGS

Arun Ram Mohan, Uday Turaga, Vishakha Shembekar, Subbaraman Viswanathan, Derek Elsworth, Sarma V. Pisupati

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Utilization of CO2 from fossil fuel power plants is an important aspect to be considered as an alternative to sequestration in mitigating the global climate change. Utilizing the heat energy from the geothermal sites for the production of electricity presents a great opportunity for the simultaneous extraction of geothermal energy and sequestration of CO2 emitted from the fossil fuel power plants. CO2 captured by pre-combustion method is more suitable for heat extraction compared to that captured by post combustion method as it is discharged at high pressure suitable for sequestration. Therefore, after considering air-blown combustion, oxy-combustion and Integrated Gasification Combined Cycle (IGCC), pairing IGCC with Enhanced Geothermal System (EGS) was found to produce a symbiotic combination for the simultaneous extraction of geothermal heat energy and sequestration of CO 2. This paper models the utilization of CO2 as a heat transfer uid for the extraction of geothermal energy and utilizing the heat for the production of electricity from the Organic Rankine Cycle (ORC). The simulations were performed in ASPEN Plus version 7.3. The first part focused on well simulation with CO2 as a heat transfer uid for extraction of geothermal heat energy to predict the temperature profile and pressure profile along the length of the injection well and the production well. The second part focused on the modeling of organic Rankine cycle for the generation of electricity by utilizing the pressure and geothermal heat energy of CO 2. These simulations showed that an additional total power output of 63 MWe and 29MWe for a geothermal source temperature of 300 °C and 200 °C, respectively could be obtained for an IGCC plant output of 315 MWe.

Original languageEnglish (US)
Title of host publication30th Annual International Pittsburgh Coal Conference 2013, PCC 2013
PublisherInternational Pittsburgh Coal Conference
Pages3893-3903
Number of pages11
Volume5
StatePublished - 2013
Event30th Annual International Pittsburgh Coal Conference 2013, PCC 2013 - Beijing, China
Duration: Sep 15 2013Sep 18 2013

Other

Other30th Annual International Pittsburgh Coal Conference 2013, PCC 2013
CountryChina
CityBeijing
Period9/15/139/18/13

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology
  • Geotechnical Engineering and Engineering Geology

Cite this

Mohan, A. R., Turaga, U., Shembekar, V., Viswanathan, S., Elsworth, D., & Pisupati, S. V. (2013). Simultaneous sequestration and extraction of geothermal energy using CO2 from an IGCC plant as a heat transfer fluid for power generation from EGS. In 30th Annual International Pittsburgh Coal Conference 2013, PCC 2013 (Vol. 5, pp. 3893-3903). International Pittsburgh Coal Conference.