Experimental investigations into power generation with low grade waste heat and R245fa Organic Rankine Cycles (ORCs)

Li, Liang; Ge, Y.T.; Luo, Xianglong; Tassou, S.A.

doi:10.1016/j.applthermaleng.2017.01.024

Cited by 87 publications

(35 citation statements)

References 21 publications

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“…Even though both efficiencies (turbine and power plant) increase, this change is less than 1 %. A study carried out by Li et al [37] supports the results obtained. The authors justify this low range of efficiencies with the low-pressure ratio in the turbines caused by a pressure drop in the turbine outlet and in the condenser inlet.…”

Section: Thermodynamic Modelling and Simulationmentioning

confidence: 53%

See 1 more Smart Citation

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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Section: Thermodynamic Modelling and Simulationmentioning

confidence: 53%

“…When the temperature increases from 100 to 150 °C, the net output keeps rising from 609.92 to 679.3 kW, respectively. These results are sustained by Li et al [37]. T he authors found that for temperatures range from 145-155 °C the power of the turbine increases.…”

Section: Thermodynamic Modelling and Simulationmentioning

confidence: 71%

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

“…From the numerical simulations, the best place for heat recovery is from hot gas before entering nozzle. Another research done by Li et al [8] was to study the small-scale ORC system performance with low grade heat sources to provide electricity in various working state. The experiment setup includes normal ORC system components, for instance, turboexpander with high speed generator, finned tube condenser, ORC pump and plate evaporator.…”

Section: Aspects Of Recovery Waste Heat Systemsmentioning

confidence: 99%

A Recent Review in Performance of Organic Rankine Cycle (ORC)

Saadon¹,

Islam²

2020

Organic Rankine Cycles for Waste Heat Recovery - Analysis and Applications

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Increasing emissions of carbon dioxide and fuel prices lead to extra efforts in finding solution to reduce the environment waste heat. One of the solutions emerging is the organic Rankine cycle (ORC) system. It is one of the promising exhaust heat recovery technologies which is widely been used to recover low to mediumgrade heat rather than conventional steam Rankine cycle system. This chapter highlights on the different conditions and configurations of ORCs that are usually been applied. These different configurations have different constraints and usually will be considered based on the applications.

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“…Results indicated that cycle exergy efficiency increased as the pinch point temperature decreased and energy and exergy efficiency were computed 9.96% and 47.22%, respectively. Li et al experimentally studied ORC performance under different operating conditions. He concluded that system thermal efficiency could be optimized by the increase of the heat source temperature and working fluid pump speed.…”

Section: Introductionmentioning

confidence: 99%

Analysis, economical and technical enhancement of an organic Rankine cycle recovering waste heat from an exhaust gas stream

Ghoreishi

Vakilabadi

Bidi

et al. 2019

Energy Science & Engineering

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Any effort with the aim of increasing the total electrical power generation (EPG) due to the existed constraints in vessels is desired in power plants. Using Organic Rankine Cycle (ORC) for recovering waste heat of an exhausting gas is considered as an auxiliary way for improving EPG value. In this study, four ORC arrangements were first modeled for six refrigerants by EES software and the first and second laws of thermodynamics efficiency (ηI and ηII, respectively) and mass flow rate were studied for these cycles. Based on modeling results, the best arrangement was selected for each refrigerant such as; F‐type (Reference cycle+ Intermediate recuperator+ Final recuperator) for R123, H‐type (Reference cycle+ Intermediate recuperator) for R114 and n‐butane and R‐type (Reference cycle + Final recuperator) for n‐pentane, n‐heptane, and toluene. The ηI value as a technical objective function was then optimized for the above cycles by Aspen HYSYS. n‐heptane and toluene cycles were chosen due to higher first‐law efficiency value and then were studied under different source temperature condition and n‐heptane cycle showed better adaptability. Afterward, exergoeconomic was applied on n‐heptane cycle and maximum cycle pressure was chosen as a design variable for economically optimizing net final income (NFI). Finally, NFI value is increased from 423.1$/kW·h to 609.9$/kW·h about 44.2%, while the second‐law efficiency value is just decreased from 25.6% to 20.6% about 5%.

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Experimental investigations into power generation with low grade waste heat and R245fa Organic Rankine Cycles (ORCs)

Cited by 87 publications

References 21 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

A Recent Review in Performance of Organic Rankine Cycle (ORC)

Analysis, economical and technical enhancement of an organic Rankine cycle recovering waste heat from an exhaust gas stream

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