Exergy analysis of a dual-level binary geothermal power plant

Kanoğlu, Mehmet

doi:10.1016/s0375-6505(02)00032-9

Cited by 181 publications

(77 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The performance of a binary-cycle geothermal power plant can also be evaluated using the cycle effectiveness, which represents the effectiveness of heat transfer to the cycle from the geothermal fluid, as [1,4,6,13] …”

Section: Performance Analysismentioning

confidence: 99%

Thermodynamic analysis and performance optimization of organic rankine cycles for the conversion of low-to-moderate grade geothermal heat

Yekoladio

Bello‐Ochende

Meyer

2015

Int. J. Energy Res.

View full text Add to dashboard Cite

The present study considers a thermodynamic analysis and performance optimization of geothermal power cycles. The proposed binary-cycles operate with moderately low temperature and liquid-dominated geothermal resources in the range of 110 o C to 160 o C, and cooling air at ambient conditions of 25 o C and 101.3 kPa reference temperature and atmospheric pressure, respectively. A thermodynamic optimization process and irreversibility analysis were performed to maximize the power output while minimizing the overall exergy destruction and improving the First-and Second-law efficiencies of the cycle. Maximum net power output was observed to increase exponentially with the geothermal resource temperature to yield 16-49 kW per unit mass flow rate of the geothermal fluid for the nonregenerative ORCs, as compared to 8-34 kW for the regenerative cycles. The cycle First-law efficiency was determined in the range of 8-15% for the investigated geothermal binary power cycles. Maximum Second-law efficiency of approximately 56% was achieved by the ORC with an IHE. In addition, a performance analysis of selected pure organic fluids such as R123, R152a, isobutane and n-pentane, with boiling points in the range of -24 o C to 36 o C, was conducted under saturation temperature and subcritical pressure operating conditions of the turbine. Organic fluids with higher boiling point temperature, such as n-pentane, were recommended for non-regenerative cycles. The regenerative ORCs, however, require organic fluids with lower vapour specific heat capacity (i.e. isobutane) for an optimal operation of the binary-cycle.

show abstract

Section: Performance Analysismentioning

confidence: 99%

Thermodynamic analysis and performance optimization of organic rankine cycles for the conversion of low-to-moderate grade geothermal heat

Yekoladio

Bello‐Ochende

Meyer

2015

Int. J. Energy Res.

View full text Add to dashboard Cite

show abstract

“…They also examined the environmental impacts of that plant. Kanoglu [59] performed exergy analysis on the Stillwater binary geothermal power plant located in Northern Nevada, USA. Exergetic efficiency of all the above mentioned plants and some other [60] are summarized in Ref.…”

Section: Exergy Analysisetheoretical Background and Short Literature mentioning

confidence: 99%

Performance analysis of electricity generation by the medium temperature geothermal resources: Velika Ciglena case study

Rašković

Guzović

Cvetković

2013

Energy

View full text Add to dashboard Cite

a b s t r a c tDuring the last decade, a design of an energy efficient and cost effective geothermal plant represents a significant and on-going technical challenge in all the Western Balkan countries. In the Republic of Croatia, the geothermal field Velika Ciglena is identified as one of the most valuable geothermal heat sources and probably the location where the first geothermal plant in the Western Balkan area will be built. The purpose of this work is the conceptual design and performance analysis of the binary plants ethe one which operates under the Organic Rankine Cycle (ORC) and the other under Kalina (KLN) cycleewhich can be used for geothermal energy utilization in Velika Ciglena. A conceptual plant design is performed by the equation-oriented modelling approach and supported by the two steady-state spreadsheet simulators. The performance analysis of all design solutions is conducted through energy and exergy analysis, and by the estimated total cost of operating units in the plant. The results of the analysis indicate that the plant design based on the ORC cycle has a higher thermodynamic efficiency and lower cost of equipment, and consequently, it is more suitable for the future geothermal plant in Velika Ciglena.

show abstract

“…So far, many studies have been conducted on the use of geothermal energy. Kanoglu (2002) analyzed and investigated a double-stage double-surface geothermal power plant with a capacity of 12.4 MW, regarding exergy. The exergy loss in power plant includes the exergy lost by the working fluid in the condenser, the turbine-pump loss, and evaporator preheater.…”

Section: Introductionmentioning

confidence: 99%

Energy, exergy, and economic analysis of a geothermal power plant

Kazemi

Ehyaei

2018

Adv. Geo-Energy Res.

View full text Add to dashboard Cite

Citation:Kazemi, H., Ehyaei, M.A. Energy, exergy, and economic analysis of a geothermal power plant. Advances in Geo-Energy Research, 2018, 2(2): 190-209, doi: 10.26804/ager.2018.07.Corresponding author: *E-mail: aliehyaei@yahoo.com Keywords:Geothermal cycle Organic Rankine Cycle exergy Abstract:The current study aimed at designing a geothermal power plant in the Nonal area in Damavand district for simultaneous generation of thermal energy the electric power in the network of Damavand City and a part of Tehran province, the organic working fluid for the above cycle is R245fa which is a non-flammable fluid of dry type. The values of energy efficiency, exergy, the net rate of entropy change, and the specific output power were calculated as 18.2%, 21.3%, 172.97 kW/K, and 31.43 kJ/kg, respectively. The cost of drilling a well, as well as designing and construction of Damavand's geothermal power plant, were calculated to be 4.2 and 521.5 million (USD), respectively. Also, the cost per generation of each kW/h of power in Damavand power plant was 17 cents. The estimated payback time is calculated as 15 years. The analysis of the cycle in different months of the year showed that exergy efficiency has little change. The only significant effect of temperature changes was on the exergy efficiency as approximately a change of 2% can be seen during a year.

show abstract

Exergy analysis of a dual-level binary geothermal power plant

Cited by 181 publications

References 9 publications

Thermodynamic analysis and performance optimization of organic rankine cycles for the conversion of low-to-moderate grade geothermal heat

Thermodynamic analysis and performance optimization of organic rankine cycles for the conversion of low-to-moderate grade geothermal heat

Performance analysis of electricity generation by the medium temperature geothermal resources: Velika Ciglena case study

Energy, exergy, and economic analysis of a geothermal power plant

Contact Info

Product

Resources

About