Analysis of the Thermodynamic Performance of Kalina Cycle System 11 (KCS11) for Geothermal Power Plant: Comparison With Kawerau ORMAT Binary Plant

Since the first geothermal power plant was built at Larderello (Italy) in 1904, many attempts have been made to improve conversion efficiency. Among innovative technologies, using the Kalina cycle is considered as one of the most effective means of enhancing the thermodynamic performance for both high and low temperature heat source systems. Although initially used as the bottoming cycle of gas turbines and diesel engines, in the late 1980s the Kalina cycle was found to be attractive for geothermal power generation [1, 2, 3]. Different versions (KSC11, KSC12 and KSC13) were designated. Comparison between Kalina cycle and other power cycles can be found in later studies [4, 5, 6]. Here we examine KSC11, because it is specifically designed for geothermal power generation, with lower capital cost [3]. We compare this design with the existing Kawerau ORMAT binary plant in New Zealand. In addition, parametric sensitivity analysis of KCS11 has been carried out for the specific power output and net thermal efficiency by changing the temperatures of both heat source and heat sink for a given ammonia-water composition.

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

Renewable Energy ◽

10.1016/j.renene.2021.03.101 ◽

2021 ◽

Author(s):

Gürcan Çetin ◽

Ali Keçebaş

Keyword(s):

Simulated Annealing ◽

Power Plant ◽

Simulated Annealing Algorithm ◽

Geothermal Power Plant ◽

Thermodynamic Performance ◽

Annealing Algorithm ◽

Geothermal Power

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Thermal Performance of Geothermal Power Plant with Kalina Cycle System

International Journal of Thermal Technologies ◽

10.14741/ijtt/2014.4.2.04 ◽

2011 ◽

Vol 4 (2) ◽

pp. 61-64

Author(s):

Deepak K.

Keyword(s):

Power Plant ◽

Thermal Performance ◽

Kalina Cycle ◽

Geothermal Power Plant ◽

Cycle System ◽

Geothermal Power

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Kamojang Geothermal Power Plant Unit-1 : 30 Years of Operation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.493.56 ◽

2014 ◽

Vol 493 ◽

pp. 56-61

Author(s):

Reza Adiprana ◽

Danu Sito Purnomo ◽

Iwan Setiono

Keyword(s):

Power Generation ◽

Power Plant ◽

High Performance ◽

Cooling Tower ◽

Geothermal Field ◽

Point Of View ◽

Operating Conditions ◽

Life Assessment ◽

Geothermal Power Plant ◽

Geothermal Power

UNIT-1 KAMOJANG geothermal power plant marked the new era of renewable energy in Indonesia. With its built capacity of 30 MWe, it constantly supply electricity to Java-Bali grid for more than 30 years now.Over those period, Unit-1 has given its best performance with highest achievement on Capacity Factor (CF) and Equivalent Availability Factor (EAF).High performance geothermal power plant involves the integration not only from the point of view of power generation, but also the optimation of geothermal potention in the area. Kamojang geothermal field, which is considered as one among five steam dominated reservoir in the world produces 200 MWe of the electricity nowadays. In order to maintain this production rate, some technical consideration must be made.Towards sustainable power generation of geothermal power, some assessment has been made to turbine, generator and cooling tower to ensure its current condition. Basically what it called remaining life assessment gives a rough picture of how long the equipment will run through in its operational condition.Based on those assessment, additional 20.900 hours is given to the turbine with the existing operating conditions. On the other hand, cooling tower infrastucture test and simulation delivers operation period for another 25 years.

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

Energies ◽

10.3390/en15020448 ◽

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.

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