Exergetic sensitivity analysis of orc geothermal power plant considering ambient temperature

Saeid Mohammadzadeh Bina, Saeid Jalilinasrabady, Hikari Fujii

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

1 Citation (Scopus)

Abstract

Binary cycles are the most common method to extract energy from moderate geothermal resources worldwide. This research investigates and compares the performance of Organic Rankine Cycle (ORC) for binary geothermal power plants from the thermodynamic point of view. A hypothetical ORC cycle which is using 150°C geothermal water as a heat source was considered in this study and its exergy and energy analysis were performed. A parametric study was also performed to understand the effect of ambient temperature and its effect on both energy and exergy efficiencies. The exergy and energy efficiencies, cooling water pump power consumption and also exergy destruction for each component are calculated within different ambient temperature and dead state as well. The results indicated that energy efficiency of the plant varies by 1 and 7% in two different scenarios that were assumed based on different control volume description for the system. Scenario (a) and (b) are based on brine exergy input rate to plant and exergy flow rate decrement across heat exchanger, respectively. Meanwhile, exergetic efficiencies of the cycle face 70%; and 34% increment based on different exergy inflows scenarios. It was concluded that condensers are the most sensitive component to dead state temperature.

Original languageEnglish
Title of host publicationGeothermal Energy Here and Now
Subtitle of host publicationSustainable, Clean, Flexible - Geothermal Resources Council 2016 Annual Meeting
PublisherGeothermal Resources Council
Pages279-286
Number of pages8
ISBN (Electronic)0934412219
Publication statusPublished - 2016
Externally publishedYes
EventGeothermal Resources Council 2016 Annual Meeting - Geothermal Energy Here and Now: Sustainable, Clean, Flexible, GRC 2016 - Sacramento, United States
Duration: Oct 23 2016Oct 26 2016

Publication series

NameTransactions - Geothermal Resources Council
Volume40
ISSN (Print)0193-5933

Other

OtherGeothermal Resources Council 2016 Annual Meeting - Geothermal Energy Here and Now: Sustainable, Clean, Flexible, GRC 2016
CountryUnited States
CitySacramento
Period10/23/1610/26/16

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Geophysics

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