Performance evaluation of organic Rankine cycle systems utilizing low grade energy at different temperature

In order to effectively utilize low grade energy at different temperatures, this paper presents three systems using liquefied nature gas (LNG) as cold source. 16 potential applicable organic working fluids are selected for different cycles and systems. In the meantime, thermodynamic and thermal-econ...

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Bibliographic Details
Published inEnergy (Oxford) Vol. 127; pp. 397 - 407
Main Authors Zhang, Mo-Geng, Zhao, Liang-Ju, Xiong, Zhuang
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 15.05.2017
Elsevier BV
Subjects
Computational fluid dynamics
Economic analysis
Economic models
Energy
Energy consumption
Fluids
Liquefied natural gas
LNG
Low grade energy
Multi-objective optimal
Multiple objective analysis
Organic Rankine cycle
Propane
Quality
Rankine cycle
System effectiveness
Temperature effects
Thermodynamics
Turbines
Working fluids
Working fluids
LNG
Multi-objective optimal
Low grade energy
Organic Rankine cycle
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Summary:In order to effectively utilize low grade energy at different temperatures, this paper presents three systems using liquefied nature gas (LNG) as cold source. 16 potential applicable organic working fluids are selected for different cycles and systems. In the meantime, thermodynamic and thermal-economic analysis and comparison based on a multi-objective optimal model has been done. The results indicate that, when the temperature of low grade energy is below 370 K, the single-system has the best performance, and the tripartite-system has the best performance when the temperature is above 370 K. Propane emerges as the most suitable working fluid for single-system and R245fa for tripartite-system. Meanwhile, best work conditions have been calculated for single-system and tripartite-system. Moreover, the turbine's cost is the largest for both systems because of the large expansion ratio. •Three systems utilizing low grade energy and LNG is proposed.•A novel multi-objective optimal model containing thermodynamic and economic param is built.•A comparison between the three systems is carried out.•An analysis base on the model is shown for different temperatures and working fluids.•Best work condition for different heat source has been gotten.
ISSN:0360-5442
1873-6785
DOI:10.1016/j.energy.2017.03.125