Selecting working fluids in organic Rankine cycle (ORC) for waste heat applications and optimal cycle parameters for different hot source temperatures

The high-temperature gas flows into the environment from many industries. Utilizing the Organic Rankine cycle (ORC) to generate electricity from this energy is worthwhile. In this study, the best thermodynamic conditions of ORC with 27 working fluids are presented. The considered temperatures for th...

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Vydáno v:Journal of thermal analysis and calorimetry Ročník 147; číslo 23; s. 13737 - 13755
Hlavní autoři: Faghih, Saeed, Pourshaghaghy, Alireza
Médium: Journal Article
Jazyk:angličtina
Vydáno: Cham Springer International Publishing 01.12.2022
Springer
Springer Nature B.V
Témata:
Analytical Chemistry
Chemistry
Chemistry and Materials Science
Combustion
Flammability
Gas flow
Genetic algorithms
Heat
Heat recovery
Heat sources
High temperature gases
Inlet temperature
Inorganic Chemistry
Low temperature
Maximum power
Measurement Science and Instrumentation
Optimization
Parameters
Physical Chemistry
Polymer Sciences
Rankine cycle
Temperature
Thermodynamics
Turbines
Working fluids
Working fluid selection
Critical temperature
Organic Rankine cycle (ORC)
Optimization
ISSN:1388-6150, 1588-2926
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Shrnutí:The high-temperature gas flows into the environment from many industries. Utilizing the Organic Rankine cycle (ORC) to generate electricity from this energy is worthwhile. In this study, the best thermodynamic conditions of ORC with 27 working fluids are presented. The considered temperatures for the heat sources were divided into low, medium, and high, with values of 50–90 ℃, 95–190 ℃, and 195–280 ℃, respectively. The optimization was carried out to get the maximum power through a genetic algorithm in MATLAB software. The optimization parameters included the inlet temperature of the turbine ( T tur ), the pressure of the ( P cond ), the pressure of the boiler ( P boil ), and the outlet temperature of hot air ( T hf , out ) . The results indicated that in low-temperature heat sources, R170 (144.13–209.87 kW) was the best fluid, and in the medium- and high-temperature heat sources, R227ea (1372.31–1533.86 kW) and R141b (6640.97–7524.6 kW) were the optimal fluids. Moreover, considering environmental issues and flammability, R744 (low-temperature), R1234ze (medium-temperature), and R245ca (high-temperature) were the best working fluids. In the low- and medium-temperature heat sources, T cri T hf , in for optimal fluids were 0.46–0.6 and 0.55–0.88, respectively. However, in the high-temperature heat source, this ratio was 0.72–0.78. As working fluids were selected, if T hf , in - T cri was above 100 ℃ or lower than 20 ℃, these working fluids were left out. In the future scope, finding a temperature for the heat source above which water is the suitable fluid compared to organic fluids and investigating the effect of changing heat carrier from air to combustion gases are proposed.
Bibliografie:ObjectType-Article-1
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content type line 14
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-022-11502-5