Binary Geothermal Power Plant Research Articles

Thermodynamic modeling and analysis of a solar and geothermal assisted multi-generation energy system

A geothermal and solar energy-assisted multi-generation energy system supplying electricity for the residences is modeled and analyzed. The system considered is a novel configuration consisting of a binary geothermal power plant and a parabolic trough concentrating solar power plant for electricity production and water electrolysis and fuel cell unit for hydrogen storage and utilization. Thermodynamic performance evaluation of the system is performed using Afyonkarahisar's geothermal and solar energy values. In Afyonkarahisar province, geothermal water temperature ranges between 70 and 130 °C and mass flow rate between 70 and 150 kg/s. Also, solar radiation incident varies between 300 and 1000 W/m2. The geothermal and solar power plants could produce 2900 kW power. If this is used entirely for hydrogen production, 0.0185 kg/s hydrogen could be produced. One can produce 1615 kW power by using this hydrogen in the fuel cell. The overall system's energy and exergy efficiencies are calculated to be 5.90% and 18.99%, respectively. The system's parametric study is performed considering geothermal resource temperatures and solar radiation values on the power output and hydrogen production.

Optimization of thermodynamic performance with simulated annealing algorithm: A geothermal power plant

Binary geothermal power plants (GPP) always attract researchers’ attention as they are renewable-energy operated, low-temperature, high-performance, environmentally-friendly, and baseload power plants. In addition, they need to be monitored, controlled and optimized due to their complex structure and functioning. This article presents the application of the Simulated Annealing (SA) algorithm for the thermodynamic performance optimization on the verified thermodynamic model of the SINEM GPP operating in Aydın, Turkey. This algorithm is also compared to the Gravitational Search Algorithm (GSA). By using these methods, 17 optimization parameters in the plant model are simultaneously optimized for maximum exergy efficiency. Study results show that the exergy analysis, gravitational search algorithm and simulated annealing algorithm respectively determined the exergy efficiency of the plant as 14.48%, 30.62%, and 38.49%. The SA algorithm has a better performance compared to the other two methods. System components such as condensers, vaporizers, and pumps are made more efficient using the SA algorithm. In addition, the most effective parameters of the plant are evaporator pressure differences and the mass flow of ORC’s working fluid. By using GSA and SA algorithm, the gross electricity generation in the power plant can be increased by 2.11 MW and 3.15 MW, respectively. While GSA uses the procedure of reducing the amount of component exergy destruction, the SA algorithm uses the procedure of reducing the amount of electricity spent in the operation of the plant equipment. The rate of non-condensing gas (NCG) outlet, which is harmful to the environment, can be reduced by using SA algorithm. In this way, a power plant can be operated more economically and in a more environmentally friendly manner.

A parametric study on exergoeconomic analysis for a binary geothermal power plant with ORC

ABSTRACT The exergoeconomic analysis of an energy conversion system is helpful to decide about topics like the cost of fuel required to produce each unit of energy, electricity sales prices affecting energy production cost amounts and how to allocate R&D funds to develop system equipment. With this aim, exergoeconomic assessment of a binary geothermal power plant (GPP) with organic Rankine cycle (ORC) is researched in detail. Therefore, a parametric study about the effect of well head and ambient temperatures, electricity production, and CO2 release is conducted for the GPP. The study shows that the exergy efficiency, exergy destruction ratio and exergoeconomic factor for the GPP are, respectively, 39.1%, 31.4%, and 58.1%. The highest total operating costs and exergy destruction rate belong to the condenser in the system with values of 186 $/h and 2.49 MW. The costs per unit exergy for the liquid and steam geothermal fluid in the GPP are 1.2 $/GJ and 370 $/GJ, respectively. The total operating cost of the GPP is nearly 1,218.38 $/h, while the cost rate per unit of electricity produced by the GPP is 0.055 $/kWh. As the ambient temperature increased, there is a 10% increase in total operating cost and this results in a 21% increase in cost per electricity produced. With the brine input temperatures of 160°C, 165°C, and 170°C, the costs per unit CO2 output are, respectively, 110 $/h, 167.50 $/h, and 307 $/h. In conclusion, as the amount of steam brine entering the GPP increases, the amount of CO2 released to the atmosphere ascends.

Thermodynamic analysis of a binary geothermal power plant

Thermodynamic analysis of a binary geothermal power plant

Thermoeconomic modeling and artificial neural network optimization of Afyon geothermal power plant

The Afyon Geothermal Power Plant is modeled using the Multi-Layer Feed-Forward Artificial Neural Network. The 100 × 8 data set obtained from the real Binary Geothermal Power Plant is divided into two parts: 80 × 8 training data and 20 × 8 test data. Geothermal Power Plant system modeling has been performed numerically on Matlab with three inputs and five outputs. There are ten neurons in the hidden layer in the Artificial Neural Network-based system, and the logarithmic sigmoid transfer function is used as the transfer function in each neuron. The neurons in the output layer have the purelin transfer function. As a result of the training process, the 3.06 × 10E-2 mean square error value was obtained from the ANN-based Binary Geothermal Power Plant system. The main point of the study is the optimization of the binary geothermal power plant. The genetic algorithm method with Artificial Neural Network-based is used for this purpose. The results obtained from the outputs of the Artificial Neural Network-based Binary Geothermal Power Plant system are presented. The plant’s geothermal water temperature and mass flow rates are 110 °C and 150 kg/s. Energy and exergy efficiencies of the plant are calculated as 10.4% and 29.7%. The optimized simple payback period and exergy cost of the electricity generated in the plant is calculated as 2.87 years and 0.0176 $/kWh, respectively.

Ecological and economic evaluation of development technology of Kumuhsky deposit of thermal waters

An ecological and economic assessment of the Kumukh thermal water field development based on a binary geothermal power plant was carried out. To show the prospects and the possibility of increasing the energy efficiency of a binary geothermal power plant at different temperatures of the injected coolant. Using a specific thermal water field as an example, the primary circuit technological parameters of a geothermal power plant were optimized, and its energy efficiency was evaluated in subcritical and supercritical organic Rankine cycles. It is shown that optimization allows to significantly improve the efficiency of energy cycles in the field, and the utilization of low-potential energy of spent brines in heat pump plants allows saving substitute fossil fuels. The analysis shows that the creation of integrated technologies for the field high-potential mineralized geothermal resources’ development will significantly improve the region’s economic structure and environmental situation. The creation of a binary geothermal power station at the Kumukh thermal water field will allow obtaining relatively cheap, environmentally-friendly electric energy with a capacity of up to 15 MW, and 2-3 MW of usable thermal power in heat pump installations, with an annual output of 135 · 106 kW · h of electric energy (more than 350 million rubles/year) and the annual savings of replacement fossil fuel more than 4000 tif. in a year.

Exergy, exergoeconomic, and exergoenvironmental optimization of the geothermal binary cycle power plant at Ampallas, West Sulawesi, Indonesia

This paper presents the multi-objective optimization of two different geothermal binary power plants based on exergy, exergoeconomic, and exergoenvironmental analysis of the geothermal binary cycle power plant located at Ampallas area, West Sulawesi, Indonesia. The study compares two binary cycle systems: the organic Rankine cycle (ORC), with isopentane as the working fluid, and the Kalina cycle with an ammonia-water mixture in the system for power production. In this study, MATLAB is combined simultaneously with Engineering Equations Solver software to simulate both binary systems and to optimize three objective functions with the genetic algorithm method. It is demonstrated that the ORC system has the highest exergy efficiency with 82.12%, a unit cost of the produced energy of 8.19 US cent/kWh and a total environmental impact of 282.29 mPt/s.

Gas purification process in a geothermal power plant with total reinjection designed for the Larderello area

Many geothermal power plants require systems for steam washing and treatment of non-condensable gases (NGCs). Steam washing is an early-stage unit and the NCG treatment is performed before the reinjection. The paper describes the potential methods for those parts of the process and evaluates the approach of scrubbers and the associated models. The first model is developed for the steam washing scrubber, which eliminates the dissolved solids from the extracted steam. The energy analysis, steam loss, and the efficiency of removal are investigated and potential approaches to the H2S removal process are discussed. The second model is dedicated to the packed-bed acid-gas scrubber, which efficiently reduces the H2S content of NCGs before the reinjection into the reservoir. This model is a rate-based approach that considers all the reactions in parallel. Also, a comprehensive model for the sizing of the scrubbers is proposed. The case study is a binary geothermal power plant, designed for the area of Larderello, in which the extracted steam consists of 25 ppm dissolved solids. The power plant design includes the NCG reinjection system, having about 0.3% of H2S content. The design parameters are found to achieve solid removal efficiency higher than 90%, thus abating the dissolved solids in the steam to less than 3 ppm by the first scrubber. The performance of the selective H2S removal treatment is optimized by identifying the best operating parameters for the effective removal of the H2S and keep the CO2. The selectivity is calculated in various conditions considering recycle-ratio, caustic solution temperature, and caustic solution concentration. The configuration of the second scrubber is optimized with an H2S removal efficiency of about 99.96 percent, with a selectivity index around 10.

Integration of cryogenic energy storage and cryogenic organic cycle to geothermal power plants

To get more out of geothermal power generation, integration of energy storage technologies to geothermal power plants could be used for base load peak shaving operations. Cryogenic energy storage is one the attractive options to store geothermal power during off-peak hours and produce power during peak hours. In this study, a new configuration consisting of a binary geothermal power plant, an air liquefaction unit, and a cryogenic organic Rankine cycle is considered and analyzed using the first and second laws of thermodynamics.A geothermal resource available at 180 °C with a flow rate of 100 kg/s is used to power a binary cycle power plant with isopentane as the working fluid. Binary power plant produces 6253 kW power, which is used to liquefy air during a 6-h charging operation. During discharge operation, the liquefied air is pumped, and used as a heat sink for the cryogenic organic Rankine cycle with propane as the working fluid. The cryogenic organic Rankine cycle produces 1387 kW power. The liquid air after condensing operation is heated in the heaters with stored heat during charging operations and expanded in turbines for additional power generation. During the discharge operation, 10,660 kW power is produced by the combined cryogenic energy storage and cryogenic organic Rankine cycle unit while the total power generation is 16,920 kW. The cryogenic organic Rankine cycle system has a thermal efficiency of 35.3 % and a second law efficiency of 29.2 %. The storage system has a round-trip efficiency of 28.4 % and a second law efficiency of 59.7 %. Six different working fluids are analyzed and compared for the cryogenic organic Rankine cycle. Effects of condensing temperature and compressor outlet pressure of the cryogenic organic Rankine cycle, and geothermal resource temperature on the system performance are investigated.

Laboratory tests simulating corrosion in geothermal power plants: influence of service conditions

One of the main challenges associated with the operation and maintenance of binary geothermal power plants is the degradation of construction materials. In this sense, it is crucial to apply appropriate preventive maintenance in critical components (such as the wellheads, heat exchangers, or pipes), while reducing shutdown times. Based on electrochemical measurements performed in an autoclave corrosion testing setup, we studied the corrosion mechanism of API L80 steel grade as a function of operational and/or maintenance procedures. We used a test fluid representative for a site in Switzerland, but the main observations made may be applicable in a wider context. We found that changes in the fluid temperature (from 200 to 100 °C) or temporary oxygen ingress significantly influenced the corrosion behavior of this carbon steel and increased its corrosion rate (from approx. 20 µm/year to > 120 µm/year). After a few days, the corrosion rate was found to decrease and stabilize around values of 50–70 µm/year, as a result of a porous corrosion product layer formed on the metal surface (approx. 250 µm thick). Electrochemical impedance spectroscopy indicated an increase in capacitance of the double layer over time, most likely due to an increase in the effective surface area of the steel sample, as a consequence of surface roughening due to corrosion. The results from this study may be implemented in the design and operation of future power plants in Switzerland and elsewhere to ensure reliable and cost-effective energy production from geothermal resources.

Thermodynamic analysis the performance of hybrid solar-geothermal power plant equipped with air-cooled condenser

Recent decades of industry experiences and previous researches indicate that growth in energy consumption worldwide and limiting fossil fuel reserves will not meet future energy needs. Therefore, utilizing renewable energy sources is essential. Recuperative Organic Rankine cycle is one of the best efficient method for utilizing such resources. The aim of the present study is the thermodynamic analysis of a hybrid solar-geothermal power plant equipped with air-cooled condensers. To simulate a binary geothermal power plant, the ENEL power plant in Churchill County (Nevada, USA) has been considered. Then, the power plant cycle (binary geothermal) has been hybridized with parabolic trough collector systems. The process simulation has been performed by a commercial thermodynamic analysis software, Aspen HYSYS 9.0. The novelty of the present work is that the hybrid solar-geothermal power plant is thermodynamically analyzed in order to design air-cooled condensers which has not been considered by the previous studies. A parametric study of decisive factors in some days of cold and hot months of a year have been studied and analyzed. The investigated factors include ambient temperature, working fluid type, working fluid mass flow rate, and geometrical fluid mass flow rate. The thermal design of air-cooled condensers was performed by HTRI software. According to the obtained results, based on the factors of minimum power consumption of each fan and based on the minimum heat transfer area of condensers, the energy consumption of condensers declined 47.32 and 33.58%, respectively.

A Geothermal-Solar Hybrid Power Plant with Thermal Energy Storage

The concept of a geothermal-solar power plant is proposed that provides dispatchable power to the local electricity grid. The power plant generates significantly more power in the late afternoon and early evening hours of the summer, when air-conditioning use is high and peak power is demanded. The unit operates in two modes: a) as a binary geothermal power plant utilizing a subcritical Organic Rankine Cycle; and b) as a hybrid geothermal-solar power plant utilizing a supercritical cycle with solar-supplied superheat. Thermal storage allows for continuous power generation in the early evening hours. The switch to the second mode and the addition of solar energy into the cycle increases the electric power generated by a large factor—2 to 9 times—during peak power demand at a higher efficiency (16.8%). The constant supply of geothermal brine and heat storage in molten salts enables this power plant to produce dispatchable power in its two modes of operation with an exergetic efficiency higher than 30%.

A STUDY OF FIELD GEOTHERMAL POWER POTENTIAL & THERMODYNAMIC CONCEPTS OF PROSPECTIVE BINARY POWER CYCLE BASED GEOTHERMAL POWER PLANT FOR TATAPANI GEOTHERMAL FIELD.

Tatapani Geothermal field is one of the most promising low-enthalpy geothermal fields in central India, located on Son-Narmada lineament in the state of Chhattisgarh, India. The Tatapani geothermal field geological, geo-chemical & reservoir data has been compiled and analysed for evaluating true power potential & better understanding of the field. The low enthalpy geothermal reservoirs can be utilized for power production using Organic Rankine Cycle (ORC) or binary power cycle. Based on previous research works done, the Tatapani geothermal field has been found to be very prospective and has got huge potential for power generation. The binary power cycle has been studied in detail along with thermodynamic concepts. In addition, similar low enthalpy geothermal power plants (conceptual & existing both) have been thoroughly studied in order to understand the concepts and methodology to perform technical feasibility based on thermodynamic and exergy analysis. The literature review covers the previous works done on Tatapani geothermal field including works on other geothermal fields in India along with previous research works for Thermodynamic & Exergy Analysis carried-out for binary geothermal power plants across the world for similar low enthalpy prospects. The methods of performing thermodynamic and exergy analysis for a potential geothermal power plant has been studied and compared. Exergy analysis highlights the areas of primary exergy destruction at various plant components and can be illustrated in the form of exergy flow diagram. The loss of exergy indicates the potential reasons for the inefficiencies within a process and exergic efficiency as conversion of input heat energy from the brine in to useful work output. The exergic efficiencies can be calculated for each component along with exergy destruction. The detailed study has been conducted in order to gather the knowledge regarding conducting the feasibility of setting up binary geothermal power plant at Tatapani from technical point of view using thermodynamic concepts.

Preliminary Study of Membrane Technology to Resolve Silica Scaling to Enhance Geothermal Binary Power Plant

Large amount of hot brines produced by liquid-dominated geothermal field should lead to utilization of binary power plant in order to increase the installed capacity. However, binary power plant system extract energy from the hot brine that could increased the possibility of silica scaling either at the surface or at the reservoir because of the temperature decrease. Methods such as acidizing, water jetting, or alkaline injection has been proven could solve or prevent the occurrence of silica scaling. Still, those methods have their own limitation to solve silica scaling problem, such as economical or technological issues. Therefore we assume that physical separation methods such as sedimentation and filtration should be done to decreased the silica scaling problems. Membrane technology seems could filled the spot, because by using membrane technology the silica content in thermal fluid could be separated completely and decreased silica scaling potential. At the end of the process, the concentration of silica could be decreased by large number. Although the silica scaling problem might not be solved completely, but the decreased potential of silica scaling still could be achieved and lead to increased installed capacity since silica scaling tend to limitate the production of thermal fluid.

Thermo-Economic Analysis of A Geothermal Binary Power Plant in Indonesia—A Pre-Feasibility Case Study of the Wayang Windu Site

Indonesia has a predicted geothermal potential of 29 GWe, which is the biggest in the world. With this potential, the government has the ambitious target to generate as much as 7 GWe of electricity in 2025 from geothermal energy. However, the installed capacity of geothermal power plant in Indonesia until 2019 is only 1.9 GWe. Enhancements in already-installed geothermal power plants with a binary power plant can be considered to achieve the 2025 target. In this research, a thermo-economic analysis is carried out to assess the feasibility of binary power systems to enhance the existing geothermal power plants in Indonesia. The Wayang Windu site is selected as the case study. Three working fluids, i.e., n-Pentane, isopentane, and R245fa, are compared. Two different optimization objectives are considered and compared. First, the thermal efficiency is optimized to maximize the thermodynamic performance. In the second scenario, the heat exchanger area is optimized to maximize the economic performance. Analysis of the economic profitability variables, namely the payback period and internal rate of return, shows that optimizing the heat exchangers gives better economic results when compared to optimizing the thermal efficiency. The results also show that the type of working fluid significantly affects both the thermal efficiency and economic profitability of the binary power plant. Moreover, n-Pentane has the most preferred thermo-economic performance for the geothermal conditions at Wayang Windu with the smallest payback period of 13 years and the highest internal rate of return of 11.28%.

Technologies of geothermal resources development in South of Russia

A technology has been proposed for the integrated development of low-temperature geothermal resources for using their thermal and water potentials for various purposes. The possibility is substantiated for efficient development of geothermal resources by construction of binary geothermal power plants (GeoPP) using idle oil and gas wells that will significantly reduce capital investments for their building. The East Ciscaucasian artesian basin situated in the South European part of Russia has a number of fields with idle wells that can be converted to thermal water production. Involving the entire fund of idle wells will make it possible to obtain up to 300 MW of summary net capacity at a geothermal power plant. This work proposes a deployment of hybrid technology of geothermal power plant coupled with combined cycle plant of gas turbine type (further GCP) for the effective utilization of medium-temperature thermal waters (80–100 °C). These technologies are shown to be promising for using such water for electricity generating with high efficiency. A comparative analysis was carried out for GeoPP and GCP operating on medium-temperature water, which has shown the advantage of the latter. According to the calculations, the implementation of hybrid technology at the Thernair field in Makhachkala town will make it possible to get a power plant capacity of up to 60 MW. The prospects of integrated processing of high-temperature geothermal brines are shown. The technological diagrams are presented where the electricity generated at a binary GeoPP is used in the unit for the chemical components extraction. The estimated parameters for the Berikey geothermal field are given. The proven reserves of the Berikey field thermal brines are shown to be promising for output more than 2000 tons of lithium carbonate annually. The prospects of integrated processing of high-temperature geothermal brines in the Tarumovka geothermal field have been presented. The thermal energy of the geothermal brine can be converted into electricity in a binary geothermal power plant using a low-boiling working agent. The Rankine thermodynamic cycles have been considered realized in the secondary circuit of the GeoPP at different temperatures of evaporation of the working agent isobutane. The most effective in terms of maximum power generation is a supercritical cycle, close to the so-called “triangular” cycle with an evaporation pressure pe = 5.0 MPa. The spent brine with a low temperature from the GeoPP will go to a chemical plant, where the main chemical components, namely, lithium carbonate, magnesia, calcium carbonate and sodium chloride will be extracted according to the developed by us technology for the integrated utilization of hydrothermal brines. For the production of valuable inorganic materials, the electricity generated at the GeoPP may be applied. The need is shown in the priority integrated processing the associated highly saline brines of the Yuzhno-Sukhokumsk group of oil and gas wells in Northern Dagestan. At present, the associated brines with a radioactive background exceeding permissible standards are dumped onto surface filtration fields. Technological solutions for their decontamination and development have been proposed.

A comprehensive exergy evaluation of a deep borehole heat exchanger coupled with a ORC plant: the case study of Campi Flegrei

The paper presents a comprehensive energy and exergy analysis of a possible geothermal power plant located in the geothermal district of Campi Flegrei (Italy), made of a coaxial WellBore Heat eXchanger coupled to an Organic Rankine Cycle. We have accounted for all system components: the ground source, the WellBore Heat eXchanger, the Organic Rankine Cycle cycle, and cooling system. The energy and exergy performance indexes of each subsystems and overall system have been evaluated, thus calculating the net power, the First-Law efficiency, the Second-Law efficiency, the irreversibilities. The results indicate a good potential of the WellBore Heat eXchanger – Organic Rankine Cycle technology in the area, as the estimated performances have similar values to those of classical binary geothermal power plants: a First-Law efficiency of 11.67% and a Second-Law efficiency of about 43.80%. The overall system performances decrease respectively to 10.62% due to the fans energy requirements in the cooling tower and to 23.15% due to the large exergy destruction occurring in the WellBore Heat eXchanger. A deep exergy analysis of the WellBore Heat eXchanger has highlighted that the overall irreversibility is strongly affected by the insulation performance between the two coaxial pipes and by the temperature deviation between the ground and the fluid. The latter one is mainly due to the continuous heat extraction from the geothermal source, therefore proposed improvement strategies consist of both the increasing of thermal resistance of the material insulating the upward pipe and the reduction of the equivalent thermal radius of the well optimizing the heat extraction profiles over the plant lifetime.

Thermodynamic Model of Geothermal Resources for Low-medium Temperatures Energy Conversion Process Optimization

Environmental and economic concerns are motivating manufacturers and public entities towards the use of renewable energy, which is continuously increasing its market penetration. Among the possible renewable energy resources, geothermal is particularly attractive compared to others such as solar and wind, mainly because of its continuity and dispatchability. Most studies in geothermal energy conversion systems model the resource as pure water or steam, while in reservoir simulations it is common practice to apply advanced geochemical modelling to estimate the long-term productivity. The presence of CO2 and saline equilibria may determine power plant optimisation conditions that differ from the ones which assume the resource as pure water or steam. The thermodynamic properties of the geothermal resource with high carbon dioxide (CO2) contents (1 to 8% in mass) within the 298 – 473 K temperature and 15 bar pressure are examined. The model applied focuses on the Equations of State (EoS) to be used in the calculation of the physical/thermodynamic properties of a mixture. The obtained results are validated through the comparison of different commercial software (UNISIM®, EES®, REFPROP®, TREND®). As an example, the Torre Alfina geothermal resource data (Middle Italy) are considered and the effects on the performance of a binary (ORC) geothermal power plant producing are examined in terms of energy and exergy efficiency. A sub-critical Iso-butane and a supercritical R134a power cycle are compared, and the advantages of the supercritical solution are demonstrated.

Techno-Economic Analysis of Hybrid Binary Cycles with Geothermal Energy and Biogas Waste Heat Recovery

In Germany, enhancing renewable power generation represents a leading step to comply with the requirements of the Energiewende agenda. The geothermal reservoir in Oberhaching is assumed as a case study, with a gross electric power equal to 4.3 MWel. The intent of this work is to design a hybrid binary geothermal power plant and to integrate it into the German energy market. Biogas waste thermal power equal to 1350 kWth is assumed as a secondary source. Two different layouts are defined for the hybrid solution: increasing the geothermal fluid temperature before entering the organic Rankine cycle (ORC) unit and superheating the working fluid after the evaporator. Stationary and quasi-stationary simulations have been performed with Aspen Plus V8.8. Results demonstrate how hybridization allows a maximum electric power increase of about 240 kWel. Off-design conditions are investigated regarding both the switch-off of exhaust gases and the annual ambient temperature fluctuations. In spite of the additional secondary source, the selected case studies cannot comply with the Minute reserve requirements (MRL). Moreover, economic results for both power-only and combined heat and power (CHP) configuration are provided. In the power-only configuration, the new-build hybrid system provides 15.42 €ct/kWh as levelized cost of electricity (LCOE), slightly lower than 16.4 €ct/kWh, as calculated in the geothermal-only solution. A CHP hybrid configuration shows a +19.22% increase in net cash flow at the end of the investment on the CHP geothermal solution.

Environmental assessment of a binary geothermal sourced power plant accompanied by exergy analysis

In this study, a geothermal power plant endowed with actual operational conditions and its equipment are evaluated using exergoenvironmental analysis from the perspective of environmental impact. Environmental impacts related to equipment (including construction, operation/maintenance and disposal), exergy destruction and pollution formation are taken into consideration. Moreover, effects of ambient temperature and brine input temperature with respect to environmental impact factors of the system are also discussed. Though this analysis, relative difference of specific environmental impacts, exergoenvironmental factor and total environmental impact are determined as 122% and 2.5% and 2285 Pts/h, respectively. The results of the study show that 98% of total environmental impact for the geothermal power plant is the cause of exergy destruction of the equipment involved. For this reason, improvement of exergetic efficiency for equipment should be considered rather than construction, operation/maintenance and disposal changes of system equipment. Hence, it is probably possible to have a higher capacity plant by getting a better condenser performance, as well as strengthening the vaporizers and the pumps. Besides, approximately 44 Pts/h of non-condensable gas-NCG (CO2 mostly) released from vaporizer to atmosphere caused environmental impact of the system to be measured as high environmental impact value of electricity equal to 0.108 Pts/kWh. In conclusion, conditions during which the ambient temperature decreases and brine input temperature increases, the system’s environmental impacts concurrently decrease. This study is expected to serve as a guidework for researchers involved in environmental impacts of geothermal power plants and improvement of the plants in terms of environmental impact.