Low global warming potential (GWP) working fluids (WFs) for Organic Rankine Cycle (ORC) applications

Bahrami, Maryam; Pourfayaz, Fathollah; Kasaeian, Alibakhsh

doi:10.1016/j.egyr.2022.01.222

Cited by 105 publications

(30 citation statements)

References 88 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, they were recommended and studied as candidates in ORC systems. 19,34,[53][54][55][56][57][58][59] The main properties and types of the selected fluids are listed in Table 2.…”

Section: Working Fluids Selectionmentioning

confidence: 99%

“…Due to the legislation constraints applied to third‐generation refrigerants, some new‐generation refrigerants, such as HFEs, and HFOs, have appeared as new candidates. HFOs represent a realistic alternative due to their excellent environmental properties, but because of their high flammability, 19 their applications are limited or at least prevent their use as single compounds from a safety perspective 44 ; therefore, they are recommended to blend with HFCs, to reduce their flammability 45 . However, the mixture phase and HFOs are outside the scope of this study.…”

Section: System Descriptionmentioning

confidence: 99%

“…Also, the selected fluids showed good performance in ORC. Therefore, they were recommended and studied as candidates in ORC systems 19,34,53–59 . The main properties and types of the selected fluids are listed in Table 2.…”

Section: System Descriptionmentioning

confidence: 99%

“…17 Consequently, thermodynamic performance cannot be considered the only sole criterion for selecting the working fluid. However, other criteria are also more attractive, such as environmental regulation parameters such as ODP, GWP, atmospheric lifetime, critical temperature, and cost, [18][19][20] as mentioned before. Therefore, choosing a WF is a competitive process, requiring a compromise between cost, safety, performance, and environmental effect.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Assessment of the thermal efficiency of subcritical power generation cycles using environmentally friendly fluids at various heat source temperatures

Ahmed

2022

Energy Science & Engineering

View full text Add to dashboard Cite

This study aims to investigate the effect of the various heat source temperature (T max ) on thermal efficiency (η th ) for the organic rankine cycle (ORC), trilateral flash cycle (TFC), and partial evaporator (PE-ORC). For this purpose, HFE7000, HFE7100, and HFE7500 were used as working fluids (WFs). The results indicate that by using HFE7000, the maximum η th was obtained for all used power cycles and temperature ranges. Compared to HFE7100, HFE7500 has higher η th at TFC, and PE-ORC at low T max , while HFE7100 has the maximum value at high T max . The η th at T max = 353 K for TFC were 8.71%, 8.34%, and 8.59%, while for ORC 12.38%, 11.82%, and 11.71% for HFE7000, HFE7100, and HFE7500, respectively. At T max = 423 K for TFC were 17.65%, 16.26%, and 16.52%, while for ORC were 18.56%, 17.38%, and 16.59% for HFE7000, HFE7100, and HFE7500, respectively. The η th results indicate that the maximum improvement at TFC by using HFE7000, and the minimum was at HFE7100, while for ORC, the maximum was at HFE7000, and the minimum was at HFE7500. Therefore, the HFE7000 fluid behaves as normal dry fluids at any used temperature, while HFE7100 as normal dry WFs at low T max while behaving as very dry WFs at T max extremely close to its T cr . HFE7500 behaves as very dry working fluids. The η th intersections temperature was at T max = 425.2 K and T max = 455.9 K for HFE7500 and HFE7100, respectively. However, there is no η th intersection for HFE7000.

show abstract

“…Therefore, they were recommended and studied as candidates in ORC systems. 19,34,[53][54][55][56][57][58][59] The main properties and types of the selected fluids are listed in Table 2.…”

Section: Working Fluids Selectionmentioning

confidence: 99%

Section: System Descriptionmentioning

confidence: 99%

Section: System Descriptionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Assessment of the thermal efficiency of subcritical power generation cycles using environmentally friendly fluids at various heat source temperatures

Ahmed

2022

Energy Science & Engineering

View full text Add to dashboard Cite

show abstract

“…As a result, the humidity created by expanding the gas in the turbine is prevented. The environmental implications, on the other hand, must be considered by selecting a fluid with a low ozone depletion potential ODP and a low global warming potential GWP [20,21]. Table 1 presents the criteria of the chosen fluids.…”

Section: System Descriptionmentioning

confidence: 99%

Thermodynamic Investigation of a Solar Energy Cogeneration Plant Using an Organic Rankine Cycle in Supercritical Conditions

Bouaziz¹

2022

Fluid Dynamics &Amp; Materials Processing

View full text Add to dashboard Cite

Investigation of thermal efficiency for subcritical ORC and TFC using super dry working fluids

Ahmed

Imre

2022

Energy Science & Engineering

View full text Add to dashboard Cite

Efficiency is a crucial factor for power cycles. Generally, in the same temperature range, the cycle efficiency for a basic organic Rankine cycle (ORC) is higher than a similar trilateral flash cycle (TFC) for almost all working fluids and heat source/heat sink temperature pairs. According to some recent results, by using super dry working fluids, the thermal efficiency of TFC can outperform its ORC counterpart at high temperatures. This study performed the thermodynamics analysis using three dry working fluids with subcritical basic ORC and TFC with zero to partial recuperated heat ratio. The results showed that using recuperative heat exchange effectively contributes to increasing the efficiency of ORC and TFC. However, the rate of efficiency increase in ORC is higher than the TFC, which can be clearly seen, especially at high maximal cycle temperatures. Using super dry working fluids, the recuperator‐free TFC has favorable cycle efficiency at high heat source temperatures. In contrast, by adding heat recovery for both systems, the ORC can outperform the TFC at 0.4, 0.2, and 0.1 recuperated heat effectiveness for Dodecane, Decane, and Nonane, respectively.

show abstract

Low global warming potential (GWP) working fluids (WFs) for Organic Rankine Cycle (ORC) applications

Cited by 105 publications

References 88 publications

Assessment of the thermal efficiency of subcritical power generation cycles using environmentally friendly fluids at various heat source temperatures

Assessment of the thermal efficiency of subcritical power generation cycles using environmentally friendly fluids at various heat source temperatures

Thermodynamic Investigation of a Solar Energy Cogeneration Plant Using an Organic Rankine Cycle in Supercritical Conditions

Investigation of thermal efficiency for subcritical ORC and TFC using super dry working fluids

Contact Info

Product

Resources

About