Evaluation of Working Fluids for Organic Rankine Cycle Based on Exergy Analysis

Setiawan, Dwi; Subrata, I Dewa Made; Purwanto, Y. Aris; Tambunan, Armansyah H.

doi:10.1088/1755-1315/147/1/012035

Cited by 5 publications

(4 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The working fluid selection may be proceeded in many different ways depending on the accepted selection criteria. Different methods of working fluid selection are consciously developed and described in scientific papers, see [46][47][48][49][50][51][52][53][54]. Nowadays, environment protection is an important issue; therefore, many working fluids that were successfully applied in ORCs are being withdrawn (e.g., R11, R12, and others).…”

Section: The Methods Of Working Fluid Selectionmentioning

confidence: 99%

The Method of the Working Fluid Selection for Organic Rankine Cycle (ORC) Systems Employing Volumetric Expanders

Kolasiński

2020

Energies

View full text Add to dashboard Cite

The working fluid selection is one of the most important issues faced when designing Organic Rankine Cycle (ORC) systems. The choice of working fluid is dictated by different criteria. The most important of them are safety of use, impact on the environment, and physical and chemical parameters. The type of ORC system in which the working fluid is to be used and the type of expander applied in this system is also affecting the working fluid selection. Nowadays, volumetric expanders are increasingly used in ORC systems. In the case of volumetric expanders, in addition to the aforementioned working fluid selection criteria, additional parameters are considered during the selecting of the working fluid, such as the range of operating pressures and geometric dimensions (determining the volume of working chambers) affecting the achieved power and efficiency of the expander. This article presents a method of selecting a working medium for ORC systems using volumetric expanders. This method is based on the dimensionless rating parameters applied for the comparative analysis of different working fluids. Dimensionless parameters were defined for selected thermal properties of the working fluids, namely thermal capacity, mean temperature of evaporation, mean temperature of condensation, pressure and volumetric expansion ratio, volumetric expandability, as well as the heat of preheating, vaporization, superheating, cooling, and liquefaction. Moreover, isentropic expansion work was considered as the rating parameter. In this article, in addition to the working fluid selection method, computational examples related to the selection of the working fluid for the ORC system fed by a heat source featuring specified temperatures are presented. The results of calculations of rating parameters and their comparison gave an outlook on the selection of appropriate working fluids.

show abstract

Section: The Methods Of Working Fluid Selectionmentioning

confidence: 99%

The Method of the Working Fluid Selection for Organic Rankine Cycle (ORC) Systems Employing Volumetric Expanders

Kolasiński

2020

Energies

View full text Add to dashboard Cite

show abstract

“…The selection of the working fluid for the ORC system is often challenging as environmental, thermodynamic and design considerations should be taken into consideration. Different methods for working fluid selection are reported in literature [39][40][41][42][43][44][45][46][47][48][49][50]. The working fluid should be non-toxic and featuring low values of global warming potential (GWP) and ozone depletion potential (ODP) indicators.…”

Section: Design Considerations and Comparison Of Different Domestic Cmentioning

confidence: 99%

“…The working fluids suitable for domestic Organic Rankine Cycle (ORC) systems[37][38][39][40][41][42][43][44][45][46][47][48][49][50].…”

mentioning

confidence: 99%

Domestic Organic Rankine Cycle-Based Cogeneration Systems as a Way to Reduce Dust Emissions in Municipal Heating

Kolasiński

2020

Energies

View full text Add to dashboard Cite

Environmental issues are nowadays of great importance. In particular air and water quality should be kept at as high levels as possible. Energy conversion systems and devices which are applied for converting the chemical energy contained in different fuels into heat, electricity and cold in the industry and housing are sources of different gases and solid particle emissions. Medical data show PM2.5 dust in particular is highly dangerous for human health. Therefore, limiting the number of low-quality fuel combustion processes is a key issue of modern energy policy. Statistical data show that domestic heating systems account for a large share of the total emissions of PM2.5 and PM10 dust. For example in Poland in 2017, the share of households in the total annual emissions of PM2.5 dust was equal to ca. 35.8%, while the share of PM2.5 emission in industry (i.e., power generating plants, industrial power plants and technologies) was equal to only 23.6%. A possible way of solving this problem is by the successful replacement of old domestic furnaces by combined heat and power (CHP) or multigeneration boilers which can be used for heating the rooms and sanitary water and generating electricity and cold. Such systems can possibly contribute in the future to significant reductions of dust emissions and air pollution in urban and rural areas by limiting the number of low-quality fuel combustion processes. This article presents design considerations and experimental results related to a domestic micro-CHP unit which is based on organic Rankine cycle (ORC) technology. The main aim of the design works and experiments was therefore the analysis of the possibility of integrating the ORC system with a standard domestic central heating gas-fired boiler. The specially designed micro-ORC system was implemented in the laboratory and experiments were performed using this test stand. The main design aims of the test-stand were: low operating pressure, small working fluid flow, low price and compact dimensions. To meet these aims, volumetric machines were chosen as the expander and working fluid pump. The experimental results were positive and show that it is possible to integrate an ORC system with a standard domestic central heating gas boiler. For different heat source temperatures, the obtained expander power ranged from 109 W to 241 W and the thermodynamic cycle efficiency ranged from 4.3% to 8.8%. These positive research results were achieved partly thanks to the positive features of the different system subassemblies.

show abstract

“…Several publications have investigated the working fluids of ORC systems based on efficiency, physical properties, safety, and environmental issues. [26][27][28][29][30][31][32] Luo et al [26] have presented a systematic approach to evaluate large groups of refrigerants and mixtures for use in ORC systems to select the best fluids with low global warming potential (GWP). They mentioned that there is no single working fluid that satisfies every aspect of environmental, health, and safety (EHS) criteria, energy efficiency, and operating conditions.…”

Section: Introductionmentioning

confidence: 99%

Isobaric Expansion Engines Powered by Low‐Grade Heat—Working Fluid Performance and Selection Database for Power and Thermomechanical Refrigeration

Sleiti

2020

Energy Tech

View full text Add to dashboard Cite

A database is developed for the most suitable working fluids for Worthington‐type and Bush‐type isobaric engines based on their performances for a wide range of heat source temperature, from 40 to 300 °C, and operating pressures from 1 to 100 bar. Thermodynamics models are developed and simulated to study the effects of different operating temperatures and pressures on the efficiency and back work ratio of both engines. Results show that in temperature range from 40 to 60 °C, the achieved efficiency is less than 4% for most cases, suggesting that practical applications in this range are very limited. Ammonia and R32 show the highest efficiencies (≈11%) at high pressure of 50 bar for the temperature range of 100–300 °C. The refrigerant R161 has high performance for pressures between 10 and 50 bar for the full range of temperatures from 80 to 300 °C, which makes R161 the choice fluid for a wide range of applications. Novel applications are introduced, which integrate these isobaric engines with vapor compression refrigeration systems. The thermodynamic cycles of the heat driven compressor with the selected working fluids as in the current study and the simplified technological solutions are crucial components of the study novelty.

show abstract

Evaluation of Working Fluids for Organic Rankine Cycle Based on Exergy Analysis

Cited by 5 publications

References 12 publications

The Method of the Working Fluid Selection for Organic Rankine Cycle (ORC) Systems Employing Volumetric Expanders

The Method of the Working Fluid Selection for Organic Rankine Cycle (ORC) Systems Employing Volumetric Expanders

Domestic Organic Rankine Cycle-Based Cogeneration Systems as a Way to Reduce Dust Emissions in Municipal Heating

Isobaric Expansion Engines Powered by Low‐Grade Heat—Working Fluid Performance and Selection Database for Power and Thermomechanical Refrigeration

Contact Info

Product

Resources

About