System performance optimization of ORC-based geo-plant with R245fa under different geothermal water inlet temperatures

Liu, Xinghua; Zhang, Yufeng; Shen, Jiang

doi:10.1016/j.geothermics.2016.12.004

Cited by 34 publications

(9 citation statements)

References 73 publications

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“…Finally, in the heat injection stage, the working fluid is heated and compressed (from low pressure to highpressure) by the heat source. After this, a new cycle starts [15], [16].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic, Environmental and Economic Simulation of an Organic Rankine Cycle (ORC) for Waste Heat Recovery: Terceira Island Case Study

Rocha‐Meneses

Silva²,

Cota³

et al. 2019

Environmental and Climate Technologies

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The aim of this study is to analyse from the thermodynamic, environmental and economic point of view an ORC for heat recovery from urban waste, using R245fa as a working fluid on the example of Terceira Island (Azores). The proposed ORC system includes two evaporators, two turbines, a condenser, a pump and a generator. The thermodynamic model is created using the Visual Basic programming language. In order to analyse the influence of pressure, temperature and mass flow on net output, efficiency, and mass flow rate of the power plant, the sensibility analysis is carried out. The results show that from the energetic point of view, urban waste recovery (using an ORC) could be a viable solution on Terceira Island, since the maximum net output produced from this system for a mass rate of 19 727 tonnes is 485 kW. The efficiency of the ORC is 25 %. Environmentally, the incineration of the urban waste produced on the island is a positive solution for these residues since it will reduce the amount of waste deposited in the landfill. However, this project is not economically viable. The losses estimated in this study exceed 500 000 EUR (per year).

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“…Finally, in the heat injection stage, the working fluid is heated and compressed (from low pressure to highpressure) by the heat source. After this, a new cycle starts [15], [16].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic, Environmental and Economic Simulation of an Organic Rankine Cycle (ORC) for Waste Heat Recovery: Terceira Island Case Study

Rocha‐Meneses

Silva²,

Cota³

et al. 2019

Environmental and Climate Technologies

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show abstract

“…More recently, a certain number of studies were performed by considering the geothermal resource degradation over time. In fact, even though they considered a steady-state model, Liu et al [18] demonstrated the impact of the heat source temperature on the performance of a geothermal power plant, which reinforces the idea of considering the entire plant lifetime when designing a cycle. Different approaches have been considered in order to model the dynamic aspects of power plants (e.g., [19], [20]), and in particular the depletion of the geothermal resource.…”

Section: Introductionmentioning

confidence: 93%

“…Note that the optimal ratio r follows a pattern similar to ṁg eo , as the two variables are linked through Eq. (18).…”

Section: Impact Of Evaporator Ua-valuementioning

confidence: 99%

Optimization of geothermal power plant design for evolving operating conditions

Pollet

Gosselin

Dallaire

et al. 2018

Applied Thermal Engineering

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“…Liu et al [3] performed a performance analysis for geothermal different heat source temperatures in the ORC system they designed using R245fa. The effect of ∆TPP,e on system performance has been determined.…”

Section: Introductionmentioning

confidence: 99%

Determination of Optimum Pinch Point Temperature Difference Depending on Heat Source Temperature and Organic Fluid with Genetic Algorithm

Ata

Kahraman

Şahin

2022

Academic Platform Journal of Engineering and Smart Systems

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In this study, the effect of evaporator pinch point temperature difference (∆TPP,e) value in Organic Rankine Cycle (ORC) on system performance was determined. Under different applications of ORC, optimum ∆TPP,e value has been determined in ORC systems designed with different heat source temperatures. By changing the ∆TPP,e value, the heat input provided to the system, the mass flow of organic fluid, the evaporation pressure and the enthalpy drop in the turbine are affected. In thermodynamic optimization, the objective function is determined as turbine power maximization. Genetic algorithm optimization technique is used. Within the scope of low and high temperature ORC applications, the optimum ∆TPP,e value of different organic fluids under 10 different heat source temperatures (Low, 90-130 °C; High, 250-290 °C) has been determined. Low temperature organic fluids have been selected from dry, isentropic, wet and new-generation categories. High temperature organic fluids have been selected from the alkane, aromatic hydrocarbon, and siloxane categories. The effect of ∆TPP,e on fluids of different categories was determined for low and high temperature ORCs. It has been determined that taking the ∆TPP,e value constant regardless of the heat source temperature and organic fluid causes performance loss in ORC.

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System performance optimization of ORC-based geo-plant with R245fa under different geothermal water inlet temperatures

Cited by 34 publications

References 73 publications

Thermodynamic, Environmental and Economic Simulation of an Organic Rankine Cycle (ORC) for Waste Heat Recovery: Terceira Island Case Study

Thermodynamic, Environmental and Economic Simulation of an Organic Rankine Cycle (ORC) for Waste Heat Recovery: Terceira Island Case Study

Optimization of geothermal power plant design for evolving operating conditions

Determination of Optimum Pinch Point Temperature Difference Depending on Heat Source Temperature and Organic Fluid with Genetic Algorithm

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