Development of PID based control strategy in maximum exergy efficiency of a geothermal power plant

Çetin, Gürcan; Özkaraca, Osman; Keçebaş, Ali

doi:10.1016/j.rser.2020.110623

Cited by 25 publications

(5 citation statements)

References 23 publications

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“…There are many other renewable energy sources not covered in this manuscript that also deploy electric actuators. For example, the direct utilization of geothermal heat energy extracted in the form of liquid or air using a ground heat pump system and utilized as warm or hot water (in the winter season) and vice versa in the summer season, which is clean and safe, is also helpful for electricity generation and mineral production [95]. The water circulating loops of the ground heat pump system consists of centrifugal pumps and flow controlling actuators [96].…”

Section: Actuators In Bioenergy Applicationsmentioning

confidence: 99%

Functionality Analysis of Electric Actuators in Renewable Energy Systems—A Review

Redekar

Deb

Ožana

2022

Sensors

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Various mechanical, hydraulic, pneumatic, electrical, and hybrid actuators can alter motion per the requirements of particular applications. However, except for electrical ones, all actuators are restricted due to their size, complex auxiliary equipment, frequent need for maintenance, and sluggish environment in renewable applications. This brief review paper highlights some unique and significant research works on applying electrical actuators to renewable applications. Four renewable energy resources, i.e., solar, wind, bio-energy, and geothermal energy, are considered to review electric actuators applicable to renewable energy systems. This review analyses the types of actuators associated with the mentioned renewable application, their functioning, their motion type, present use, advantages, disadvantages, and operational problems. The information gathered in this paper may open up new ways of optimization opportunities and control challenges in electrical actuators, thereby making more efficient systems. Furthermore, some energy-efficient and cost-effective replacements of convectional actuators with new innovative ones are suggested. This work aims to benefit scientists and new entrants working on actuators in renewable energy systems.

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Section: Actuators In Bioenergy Applicationsmentioning

confidence: 99%

Functionality Analysis of Electric Actuators in Renewable Energy Systems—A Review

Redekar

Deb

Ožana

2022

Sensors

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“…Ground source heat pumps (GSHPs) are much more expensive due to the drilling work and materials required for the ground heat exchangers; however, they are more efficient than ASHPs, and they can be used as effective energy sources for buildings even in cold climates [16,17]. However, as the performance of GHPS systems depends strongly on the local geological characteristics, the design of ground heat exchangers is more challenging and requires the proper identification of soil-specific thermal properties such as thermal conductivity and specific heat [18][19][20][21] which are strongly related to the moisture content of the soil [22,23].…”

Section: Introductionmentioning

confidence: 99%

Multi-Criteria Study on Ground Source Heat Pump with Different Types of Heat Exchangers

Żelazna,

Gołębiowska,

Kosaryha

2024

Energies

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Heat pumps are currently one of the most frequently applied heat sources in residential buildings. Ground source heat pumps are more reliable than air source heat pumps in terms of energy efficiency, especially in colder climates. However, they are more expensive and involve increased material inputs; therefore, multi-criteria analyses taking into account environmental and economic aspects seem necessary for the green design of these systems. The aim of this work was to analyze the environmental and economic impacts of the ground source heat pump providing heating for a family house located in eastern Poland, cooperating with three types of ground heat exchangers (each in two sizing options): helix, vertical and horizontal. The multi-criteria analysis was based on the life cycle assessment methodology using IMPACT 2002+ and life cycle costs methods. The lowest environmental impact was reported for the variants with vertical ground heat exchangers, mainly due to their high efficiency in the operation stage. On the other hand, the lowest economic impact was observed for the horizontal heat exchangers, which are not demanding in terms of material and construction costs. Final recommendations based on multi-criteria analysis propose the vertical probes as a sustainable solution, with a weighted sum indicator in the range 0.085–0.297 on 0–1 scale.

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“…Although the areas exposed to the sun are extensive lands and do not depend on a specific source, their use has increased rapidly due to their practical application and high theoretical power potential [6]. Compared with solar energy, geothermal energy is independent of weather conditions and has great potential to become a reliable source [7]. Geothermal is a form of energy conversion from the interior of the earth, which is cost-effective, sustainable and renewable energy [8,9].…”

Section: Introductionmentioning

confidence: 99%

Techno-Economic Comparison of Solar and Geothermal Energy-based Systems: A Case Study in Western Sichuan

Lei

2023

E3S Web Conf.

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The application of renewable energy can effectively alleviate energy shortages and environmental pollution. However, electric heating and traditional combustion heating are still widely used in western Sichuan. This paper analyzes a techno-economic comparison between a solar-air energy heating system (System 1) and a geothermal-air energy heating system (System 2) designed for Litang. First, the distribution of renewable energy in Litang is analyzed. The system devices and operating modes of the two systems are described. According to the system design results, the paper compares the initial cost, operation cost, and net present value (NPV) of the two systems. The results show that both schemes are feasible from the perspective of technical analysis. While System 2 has lower initial investment, operation cost and higher NPV, which meets the actual needs of the project and local development planning. Using geothermal resources for urban central heating can achieve good energy saving and emission reduction benefits, and provide a reference for improving the proportion of local renewable energy use and optimizing the energy structure.

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Development of PID based control strategy in maximum exergy efficiency of a geothermal power plant

Cited by 25 publications

References 23 publications

Functionality Analysis of Electric Actuators in Renewable Energy Systems—A Review

Functionality Analysis of Electric Actuators in Renewable Energy Systems—A Review

Multi-Criteria Study on Ground Source Heat Pump with Different Types of Heat Exchangers

Techno-Economic Comparison of Solar and Geothermal Energy-based Systems: A Case Study in Western Sichuan

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