Mixtures of CO2-SF6 as working fluids for geothermal plants

Adrian S. Sabau; Hebi Yin; Steven J. Pawel; Miroslaw Gruszkiewicz; Joanna McFarlane; James C. Conklin; Lou A. Qualls

doi:10.1115/imece2011-65326

Mixtures of CO₂-SF₆ as working fluids for geothermal plants

Adrian S. Sabau, Hebi Yin, Steven J. Pawel, Miroslaw Gruszkiewicz, Joanna McFarlane, James C. Conklin, Lou A. Qualls

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

3 Scopus citations

Abstract

In this paper, mixtures of CO₂ and SF₆ were evaluated as working fluids for geothermal plants based on property measurements, molecular dynamics modeling, thermodynamic cycle analysis, and materials compatibility assessment. The CO₂ - SF₆ was evaluated for a reservoir temperature of 160°C. Increasing the efficiency for these low reservoir sources will increase the options available for geothermal energy utilization in more sites across the country. The properties for the mixtures were obtained either from thermodynamic property measurements and molecular dynamics simulations. Optimum compositions of the CO₂ - SF ₆ were identified for a well reservoir temperature and a given water-cooling condition. Concerning the global warming potential, it was estimated that the equivalent CO₂ emissions per 1kWh for a Rankine cycle operating with 100% SF₆ would be approximately of 7.6% than those for a coal-fired power plant.

Original language	English
Title of host publication	Energy Systems Analysis, Thermodynamics and Sustainability; Combustion Science and Engineering; Nanoengineering for Energy
Publisher	American Society of Mechanical Engineers (ASME)
Pages	227-235
Number of pages	9
Edition	PARTS A AND B
ISBN (Print)	9780791854907
DOIs	https://doi.org/10.1115/imece2011-65326
State	Published - 2011
Externally published	Yes
Event	ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011 - Denver, CO, United States Duration: Nov 11 2011 → Nov 17 2011

Publication series

Name	ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011
Number	PARTS A AND B
Volume	4

Conference

Conference	ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011
Country/Territory	United States
City	Denver, CO
Period	11/11/11 → 11/17/11

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1115/imece2011-65326

Cite this

Sabau, A. S., Yin, H., Pawel, S. J., Gruszkiewicz, M., McFarlane, J., Conklin, J. C., & Qualls, L. A. (2011). Mixtures of CO₂-SF₆ as working fluids for geothermal plants. In Energy Systems Analysis, Thermodynamics and Sustainability; Combustion Science and Engineering; Nanoengineering for Energy (PARTS A AND B ed., pp. 227-235). (ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011; Vol. 4, No. PARTS A AND B). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/imece2011-65326

Sabau, Adrian S. ; Yin, Hebi ; Pawel, Steven J. et al. / Mixtures of CO₂-SF₆ as working fluids for geothermal plants. Energy Systems Analysis, Thermodynamics and Sustainability; Combustion Science and Engineering; Nanoengineering for Energy. PARTS A AND B. ed. American Society of Mechanical Engineers (ASME), 2011. pp. 227-235 (ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011; PARTS A AND B).

@inproceedings{19cd96e37d2449f7a2972f610c8220ca,

title = "Mixtures of CO2-SF6 as working fluids for geothermal plants",

abstract = "In this paper, mixtures of CO2 and SF6 were evaluated as working fluids for geothermal plants based on property measurements, molecular dynamics modeling, thermodynamic cycle analysis, and materials compatibility assessment. The CO2 - SF6 was evaluated for a reservoir temperature of 160°C. Increasing the efficiency for these low reservoir sources will increase the options available for geothermal energy utilization in more sites across the country. The properties for the mixtures were obtained either from thermodynamic property measurements and molecular dynamics simulations. Optimum compositions of the CO2 - SF 6 were identified for a well reservoir temperature and a given water-cooling condition. Concerning the global warming potential, it was estimated that the equivalent CO2 emissions per 1kWh for a Rankine cycle operating with 100% SF6 would be approximately of 7.6% than those for a coal-fired power plant.",

author = "Sabau, {Adrian S.} and Hebi Yin and Pawel, {Steven J.} and Miroslaw Gruszkiewicz and Joanna McFarlane and Conklin, {James C.} and Qualls, {Lou A.}",

year = "2011",

doi = "10.1115/imece2011-65326",

language = "English",

isbn = "9780791854907",

series = "ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011",

publisher = "American Society of Mechanical Engineers (ASME)",

number = "PARTS A AND B",

pages = "227--235",

booktitle = "Energy Systems Analysis, Thermodynamics and Sustainability; Combustion Science and Engineering; Nanoengineering for Energy",

edition = "PARTS A AND B",

note = "ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011 ; Conference date: 11-11-2011 Through 17-11-2011",

}

Sabau, AS, Yin, H, Pawel, SJ, Gruszkiewicz, M, McFarlane, J, Conklin, JC & Qualls, LA 2011, Mixtures of CO₂-SF₆ as working fluids for geothermal plants. in Energy Systems Analysis, Thermodynamics and Sustainability; Combustion Science and Engineering; Nanoengineering for Energy. PARTS A AND B edn, ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011, no. PARTS A AND B, vol. 4, American Society of Mechanical Engineers (ASME), pp. 227-235, ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011, Denver, CO, United States, 11/11/11. https://doi.org/10.1115/imece2011-65326

Mixtures of CO₂-SF₆ as working fluids for geothermal plants. / Sabau, Adrian S.; Yin, Hebi; Pawel, Steven J. et al.
Energy Systems Analysis, Thermodynamics and Sustainability; Combustion Science and Engineering; Nanoengineering for Energy. PARTS A AND B. ed. American Society of Mechanical Engineers (ASME), 2011. p. 227-235 (ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011; Vol. 4, No. PARTS A AND B).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Mixtures of CO2-SF6 as working fluids for geothermal plants

AU - Sabau, Adrian S.

AU - Yin, Hebi

AU - Pawel, Steven J.

AU - Gruszkiewicz, Miroslaw

AU - McFarlane, Joanna

AU - Conklin, James C.

AU - Qualls, Lou A.

PY - 2011

Y1 - 2011

N2 - In this paper, mixtures of CO2 and SF6 were evaluated as working fluids for geothermal plants based on property measurements, molecular dynamics modeling, thermodynamic cycle analysis, and materials compatibility assessment. The CO2 - SF6 was evaluated for a reservoir temperature of 160°C. Increasing the efficiency for these low reservoir sources will increase the options available for geothermal energy utilization in more sites across the country. The properties for the mixtures were obtained either from thermodynamic property measurements and molecular dynamics simulations. Optimum compositions of the CO2 - SF 6 were identified for a well reservoir temperature and a given water-cooling condition. Concerning the global warming potential, it was estimated that the equivalent CO2 emissions per 1kWh for a Rankine cycle operating with 100% SF6 would be approximately of 7.6% than those for a coal-fired power plant.

AB - In this paper, mixtures of CO2 and SF6 were evaluated as working fluids for geothermal plants based on property measurements, molecular dynamics modeling, thermodynamic cycle analysis, and materials compatibility assessment. The CO2 - SF6 was evaluated for a reservoir temperature of 160°C. Increasing the efficiency for these low reservoir sources will increase the options available for geothermal energy utilization in more sites across the country. The properties for the mixtures were obtained either from thermodynamic property measurements and molecular dynamics simulations. Optimum compositions of the CO2 - SF 6 were identified for a well reservoir temperature and a given water-cooling condition. Concerning the global warming potential, it was estimated that the equivalent CO2 emissions per 1kWh for a Rankine cycle operating with 100% SF6 would be approximately of 7.6% than those for a coal-fired power plant.

UR - http://www.scopus.com/inward/record.url?scp=84869172188&partnerID=8YFLogxK

U2 - 10.1115/imece2011-65326

DO - 10.1115/imece2011-65326

M3 - Conference contribution

AN - SCOPUS:84869172188

SN - 9780791854907

T3 - ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011

SP - 227

EP - 235

BT - Energy Systems Analysis, Thermodynamics and Sustainability; Combustion Science and Engineering; Nanoengineering for Energy

PB - American Society of Mechanical Engineers (ASME)

T2 - ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011

Y2 - 11 November 2011 through 17 November 2011

ER -

Sabau AS, Yin H, Pawel SJ, Gruszkiewicz M, McFarlane J, Conklin JC et al. Mixtures of CO₂-SF₆ as working fluids for geothermal plants. In Energy Systems Analysis, Thermodynamics and Sustainability; Combustion Science and Engineering; Nanoengineering for Energy. PARTS A AND B ed. American Society of Mechanical Engineers (ASME). 2011. p. 227-235. (ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011; PARTS A AND B). doi: 10.1115/imece2011-65326