scholarly journals Feasibility study and energy efficiency estimation of geothermal power station based on medium enthalpy water

2007 ◽  
Vol 11 (3) ◽  
pp. 135-142 ◽  
Author(s):  
Aleksandra Borsukiewicz-Gozdur ◽  
Wladyslaw Nowak
Keyword(s):  
Energy Efficiency ◽  
Power Plant ◽  
Geothermal Energy ◽  
Geothermal Water ◽  
Power Station ◽  
Efficient Utilization ◽  
Geothermal Power Plant ◽  
Geothermal Power Station ◽  
Efficiency Estimation ◽  
Geothermal Power

In the work presented are the results of investigations regarding the effectiveness of operation of power plant fed by geothermal water with the flow rate of 100, 150, and 200 m3/h and temperatures of 70, 80, and 90 ?C, i. e. geothermal water with the parameters available in some towns of West Pomeranian region as well as in Stargard Szczecinski (86.4 ?C), Poland. The results of calculations regard the system of geothermal power plant with possibility of utilization of heat for technological purposes. Analyzed are possibilities of application of different working fluids with respect to the most efficient utilization of geothermal energy. .

Thermal Design of Alkaline Water Electrolysis Assisted by Combined Flash Binary Geothermal Power Plant

2013 ◽  
Author(s):  
Mehmet Kanoglu ◽  
Ceyhun Yilmaz
Keyword(s):  
Power Plant ◽  
Hydrogen Production ◽  
Geothermal Energy ◽  
Thermal Design ◽  
Geothermal Water ◽  
Geothermal Power Plant ◽  
Alkaline Water ◽  
Energy And Exergy ◽  
Binary Geothermal Power Plant ◽  
Geothermal Power

The purpose of this study is thermoeconomic performance evaluation of alkaline water hydrogen production assisted by geothermal energy. In this study energy, exergy and cost balances of combined systems of each component for hydrogen production assisted by geothermal energy will be written. Exergy of each involved stream will be calculated and the exergetic balance of each subsystem will be assessed, as well as the global system, identifying and quantifying losses. This will allow thermodynamic performances of combined systems and each component. This information will be relevant to optimize the system performance from an economical point of view. We consider a geothermal resource at 230°C available at a rate of 230 kg/s. Under realistic operating conditions, 21545 kW power can be produced in a power plant. The produced power is used for the electrolysis process. The electrolysis water can be preheated to 67.6°C by the geothermal water leaving the power plant and hydrogen can be produced at a rate of 0.1125 kg/s. Also, combine flash binary geothermal power plant energy and exergy efficiencies are calculated to be 12.1% and 57.4% at this condition. Electrolysis system energy and exergy efficiencies are calculated to be 71.4% and 60.7% of geothermal water temperature at 230°C and geothermal water flow rate at 230 kg/s. We evaluated at unit exergetic cost of electricity combined flash binary system is 10.1$/GJ (0.0364 $/kWh) and unit exergetic cost of hydrogen is 34.6$/GJ (4.16 $/kg H2).

scholarly journals Keunggulan, Tantangan, dan Rekomendasi Kebijakan akan Pengembangan Energi Panas Bumi di Indonesia

2020 ◽  
Vol 2 (2) ◽  
pp. 31-46
Author(s):  
Salma Zafirah Wisriansyah ◽  
◽  
Dorman Purba ◽  
Arnaldo Napitu
Keyword(s):  
Power Plant ◽  
Geothermal Energy ◽  
Large Area ◽  
Geothermal Exploration ◽  
Geothermal Power Plant ◽  
The Pacific ◽  
Geothermal Power ◽  
The Government ◽  
Plant Capacity ◽  
Exploration Phase

As a country that sits on the Pacific Ring of Fire, Indonesia has become the second largest geothermal power producer in the world. Geothermal energy is a clean-renewable energy that can help the country in reducing greenhouse gas emissions and secure its electricity supply in the future. Through Rencana Umum Energi Nasional (RUEN), government of Indonesia has set the target of building 7200 geothermal power plant capacity by 2025. However, per 2020, Indonesia has only built roughly about 2100 MW geothermal power plant capacity. This study aims to highlight geothermal’s advantages compared to other renewable energies and to discuss the biggest obstacle that had caused the sluggish development of geothermal power plant. This study is also expected to give strategic recommendations to the government to solve the biggest obstacle in developing geothermal power plant. The advantages of geothermal energy are environtmentally friendly, not intermittent, capable to be the base load, and doesn’t need a large area. This study argues that the biggest obstacle in developing geothermal power plant lies the exploration phase. Some actions had been taken by the government of Indonesia to support the exploration phase but this study believes that there are still some solutions that the government can take in order to be more supportive of geothermal exploration phase in Indonesia such as establishing geothermal-exploration entity, implementing depletion premium, and removing fossil fuel subsidy. These recommendations are expected to be capable in helping the government to achieve 7200 MW by 2025.

scholarly journals Key Elements of Environmental Justice in the Geothermal Power Plant Resistance Movement

2019 ◽  
Vol 5 (1) ◽  
pp. 65
Author(s):  
Priyo Fajar Santoso ◽  
Bevaola Kusumasari
Keyword(s):  
Power Plant ◽  
Environmental Justice ◽  
Geothermal Energy ◽  
Environmentally Friendly ◽  
Host Community ◽  
Primary Data ◽  
Geothermal Power Plant ◽  
Active Involvement ◽  
Geothermal Power ◽  
Resistance Movement

Geothermal energy is currently considered an environmentally friendly, renewable energy source. However, based on empirical data from various countries, geothermal energy production often results socio-ecological losses for the host community. Various environmental justice movements have emerged to protect environment by protesting and providing a counter discourse against the dominant perception that geothermal energy is renewable and environmentally friendly. This article aimed to understand how the strategy and discourse of the Aliansi Selamatkan Slamet (freely translated into Save Slamet Alliance) movement in rejecting the construction of the Baturraden Geothermal Power Plant (PLTPB) in Banyumas by outlining the key elements and specific conditions observed. Aliansi Selamatkan Slamet is intriguing because it has achieved active involvement of various elements through its respective perspectives to jointly reject the construction of the PLTPB. Using a theoretical framework of the movement strategy, we examined how Aliansi Selamatkan Slamet determined the selection of targets, framing, time, and relations in the resistance movement. The method was a qualitative approach: a review of primary data in the form of interviews and written documents. The results indicate sociopolitical conditions, relations between organizations, and organizational cultures also influence the strategies and discourses that the Aliansi Selamatkan Slamet movement created.

scholarly journals The Impact of Soil Hydrothermal Properties on Geothermal Power Generation (GPG): Modeling and Analysis

Energies ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 448
Author(s):  
Zhengguang Liu ◽  
Gaoyang Hou ◽  
Ying Song ◽  
Hessam Taherian ◽  
Shuaiwei Qi
Keyword(s):  
Heat Transfer ◽  
Power Generation ◽  
Porous Media ◽  
Power Plant ◽  
Geothermal Energy ◽  
Collection Efficiency ◽  
Porous Media Flow ◽  
Geothermal Power Plant ◽  
Geothermal Power ◽  
The Impact

Geothermal power plants have become the main application that utilizes geothermal energy. The utilization of deep geothermal energy adheres great importance to the soil condition. One of the biggest challenges faced by geothermal power plant designers is to reduce the risk of soil exploration. To solve this problem, forecasting by modeling has proven to be an important tool to address the problem. In this research, a geo-model was established by modeling three geological layers with different hydraulic and thermal properties to solve the above dilemma. The layers, elevation, and fault zones were simulated using interpolation functions from an artificial dataset. The coupled porous media flow and heat transfer problem using Darcy’s law, as well as heat transfer in porous media interfaces, were studied. The evolution of the flow field, hydrothermal performance, and temperature gradient were also analyzed for a period of 10 years. The results showed the recoverable thermal energy area gradually moved downwards during the 10-year simulation time. When the distance between the recharge well and the production well exceeded 200 m, the collection efficiency was significantly decreased. After 5 years of extraction, the power generation efficiency of the heat source will be less than 9.75%. These results effectively avoided the exploration cost of geothermal power plant site selection, which is significant for the efficiency improvement of geothermal energy.

EXERGY ANALYSIS OF GEOTHERMAL POWER PLANT KAMOJANG 68, 3 MW IN CAPACITY

2018 ◽  
Vol 7 (2) ◽  
Author(s):  
Amiral Aziz
Keyword(s):  
Energy Efficiency ◽  
Power Plant ◽  
Exergy Analysis ◽  
Exergy Efficiency ◽  
Preliminary Design ◽  
Exergy Destruction ◽  
Geothermal Power Plant ◽  
Production Wells ◽  
Geothermal Power ◽  
Exergy Losses

The importance of exergy analysis in preliminary design of geothermal power has been proven. An exergy analysis was carried out and the locations and quantities of exergy losses, wastes and destructions in the different processes of the plan were pinpointed. The obtained results show that the total exergy available from production wells KMJ 68 was calculated to be 6967.55 kW. The total exergy received from wells which is connected during the analysis and enter into the separator was found to be 6337.91 kW in which 5808.8 kW is contained in the steam phase. The overall exergy efficiency for the power plant is 43.06% and the overall energy efficiency is 13.05 %, in both cases with respect to the exergy from the connected wells. The parts of the system with largest exergy destruction are the condenser, the turbine, and the disposed waste brinekeywords: exergy, irreversibility, geothermal power plant, KMJ 68

scholarly journals GEOTHERMAL EXPLOITATION IN A WORLD HERITAGE SITE: A CASE STUDY OF GUNUNG LEUSER NATIONAL PARK

2021 ◽  
Vol 10 (1) ◽  
pp. 94
Author(s):  
Marsudi Triatmodjo ◽  
Agustina Merdekawati ◽  
Sandy Nurvianto ◽  
Irkham Afnan Trisandi Hasibuan ◽  
I Gusti Putu Agung
Keyword(s):  
Power Plant ◽  
Geothermal Energy ◽  
National Park ◽  
World Heritage ◽  
World Heritage Site ◽  
Core Zone ◽  
Geothermal Power Plant ◽  
The Core ◽  
Heritage Site ◽  
Geothermal Power

<em>Act No. 21/2014 on Geothermal Energy is considered a solution to the slow development of geothermal energy utilization for power plants by opening the way for exploitation in conservation forest areas. However, in practice, such exploitation is still constrained because it often clashes with the conservation interest. This study aims to review: (1) the role of Act No. 21/2014 as a legal justification to conduct geothermal power plant exploitation in Gunung Kembar and Gunung Waihlup within the core zone of Gunung Leuser National Park (GLNP), and (2) the potential impact of such exploitation on the international recognition of Tropical Rainforest Heritage of Sumatra (TRHS) as a world heritage. This research is normative legal research, using secondary data consisting of primary and secondary legal materials, and employs a qualitative method to analyze the data. The results showed that Act No. 21/2014 could not justify geothermal exploitation activity within the core zone of GLNP. The study also concluded that the geothermal power plant activity is projected to have the potential to compromise TRHS recognition as a world heritage site.</em>

scholarly journals Indonesian Geothermal Energy Potential as Source of Alternative Energy Power Plant

KnE Energy ◽  
2015 ◽  
Vol 1 (1) ◽  
pp. 119 ◽  
Author(s):  
Puji Suharmanto ◽  
Annisa Nor Fitria ◽  
Sitti Ghaliyah
Keyword(s):  
Power Plant ◽  
Geothermal Energy ◽  
Alternative Energy ◽  
Electrical Energy ◽  
Energy Potential ◽  
Geothermal Power Plant ◽  
Total Potential ◽  
Geothermal Potential ◽  
Volcanic Formation ◽  
Geothermal Power

<p>Indonesia is known as the Ring of Fire, nearly about 40% world's geothermal potential located in Indonesia. About 252 geothermal sites in Indonesia spread following the path of volcanic formation which stretches from Sumatra, Java, Nusa Tenggara, Sulawesi, to Maluku. It has total potential of about 27 GWe. Geothermal energy as a renewable energy and environmentally friendly, this large potential needs to be upgraded the contribution to fulfill domestic energy need which is able to reduce Indonesia's dependence on fossil energy sources which are depleting. Potential for geothermal energy is expected to fulfill the target of developing geothermal energy to generate electricity through the Geothermal Power Plant of 6000 MWe in 2020.</p><p><strong>Keywords:</strong> Geothermal Energy, Electrical Energy, Geothermal Power Plant <br /><br /></p>

scholarly journals Energy efficiency assessment of hybrid solar-geothermal power plant

2019 ◽  
Vol 21 (4) ◽  
pp. 3-11
Author(s):  
B. D. Gemechu ◽  
V. I. Sharapov
Keyword(s):  
Energy Efficiency ◽  
Power Plant ◽  
Power System ◽  
Power Plants ◽  
Concentrated Solar Power ◽  
Parabolic Trough ◽  
Geothermal Power Plant ◽  
Hybrid Power ◽  
Hybrid Power Plant ◽  
Geothermal Power

An assessment of the energy efficiency of a hybrid solar-geothermal power plant is performed taking into account the geothermal resource of one of the productive well (TD4) and the direct normal irradiance at Tendaho geothermal site in Ethiopia. A thermodynamic model of a single-flash geothermal plant integrated with a parabolic trough concentrated solar power system is developed to estimate the energy production in a hybrid solar-geothermal power plant. In the hybrid power plant, the parabolic trough concentrated solar power system is employed to superheat the geothermal steam in order to gain more energy before it expands in the turbine. Thermodynamic analysis, based on the principles of mass and energy conservation, was performed to assess the efficiency of the hybrid power plant at the given conditions of Tendaho geothermal site. A figure of merit analysis was also employed to evaluate whether a hybrid power plant could produce more power than two stand-alone power plants namely the solar and geothermal power plants that constitute the hybrid power plant. Results showed that the hybrid power plant technically outperformed the two stand-alone power plants. By integrating the two energy resources, the hybrid power plant proved to generate 7158 kW of electricity which is larger than the sum of the two stand-alone power plants (geothermal and solar).

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