Comparative analysis of natural and synthetic refrigerants in application to low temperature Clausius–Rankine cycle

Borsukiewicz-Gozdur, A.; Nowak, W.

doi:10.1016/j.energy.2006.07.012

Cited by 143 publications

(59 citation statements)

References 10 publications

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“…The exothermic adsorption process is characterized in terms of thermodynamic categories as the difference in the function H − S with respect to the adsorbate in two phases: solid minus gas. Moreover, these issues are of great importance in practice in multifunctional systems [cooling, heating (Borsukiewicz-Gozdur and Nowak 2007;Aphornratana and Eames 1995;Sumathy et al 2003;Hassan et al 2011;Gwadera and Kupie 2011)] implemented by adsorption/desorption using effectively low-energy gases (Borsukiewicz-Gozdur and Nowak 2007;Gwadera and Kupie 2011).…”

Section: Introductionmentioning

confidence: 99%

Enthalpy–entropy compensation for isosteric state adsorption at near ambient temperatures

Mianowski

Urbańczyk

2017

Adsorption

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List of symbols AbstractThe adsorption process at near ambient temperatures indicated that the EEC (enthalpy-entropy compensation) is affected by three basic thermodynamic values: ∆H, ∆S and T. The consequence is that it is possible to determine an isosteric straight (symbol H − S) without experimental studies based on the slope coefficient T iso , which is the constant arising from the expected temperature range (about 0-60 °C). Therefore, EEC curves can be obtained by appropriate modification of the temperature range. In the case of entropy of adsorption, the decisive influence is the entropy of gas. For visualization and characterization of this impact, we proposed resolute pointer µ (Eq. 25), through which it is observed that for small values of the equilibrium vapor pressure, as P → 0, there are significant deviations from the isosteric straight H − S. The case where P → P 0 followed a gradual grouping of experimental data in accordance with the relationship with H − S. We used the three-parameter equation for exothermic processes. For the extrapolated conditions, the so-called point of zero adsorption represented the enthalpy and entropy of adsorption, whose values are analogous to previous results in the literature, which can be considered an appropriate analytical method to determine these two thermodynamic values.

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Section: Introductionmentioning

confidence: 99%

Enthalpy–entropy compensation for isosteric state adsorption at near ambient temperatures

Mianowski

Urbańczyk

2017

Adsorption

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“…The choice of proper working fluids has been discussed in the literature (Karellas and Schuster, 2008;Saleh et al, 2007;Borsukiewcz-Gozdur and Nowak, 2007;Quoilin and Lemort, 2007;Somayaji, 2008). According to the results, the basis for the selection of the fluid can be summarized as follows.…”

Section: Working Fluid Selectionmentioning

confidence: 99%

Waste Heat Utilization in Natural Gas Pipeline Compression Stations by an Organic Rankine Cycle

Yılmazoğlu

Amirabedin

Shotorban

2014

Energy Exploration & Exploitation

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Utilizing compressors, natural gas compression stations (NGCS) supply the required pressure to transport the natural gas in pipelines. This study proposes to utilize the waste heat of gas turbines (GT), employed in these stations, to produce shaft power for compressors. A NGCS coupled to an Organic Rankine Cycle (ORC) is simulated by THERMOFLEX in this study. Ten different working fluids are compared against each other in the ORC to select a working fluid with the highest possible efficiency and obtainable power, and lowest possible environmental impacts. According to the results, n-Pentane is selected to be the working fluid, as compared to others, it better meets these criteria. The effects of the variation of the ambient temperature and the condenser pressure on the net power of the cycle working with n-Pentane are investigated in details. It was found that the utilization of waste heat in NGCS by an ORC can improve the energy efficiency and generates electricity for near rural areas.

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“…Previously published work [21] has investigated different types of multi-component mixtures comprising hydrocarbons, hydrofluorocarbons or siloxanes together with important mixture performance measures and constraints that need to be considered for their evaluation. Hydrocarbon mixtures were also proposed considering regenerative preheating ORC schemes [22], equipment sizing [23] and zeotropic fluids [24] for efficient exploitation of moderate temperature geothermal resources. Mixtures of siloxanes or hydrocarbons have been considered [25] to recover wasted heat from molten carbonate fuel cells using an ORC.…”

Section: Working Fluid Selection Applicationsmentioning

confidence: 99%

Systematic Methods for Working Fluid Selection and the Design, Integration and Control of Organic Rankine Cycles—A Review

2015

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Efficient power generation from low to medium grade heat is an important challenge to be addressed to ensure a sustainable energy future. Organic Rankine Cycles (ORCs) constitute an important enabling technology and their research and development has emerged as a very active research field over the past decade. Particular focus areas include working fluid selection and cycle design to achieve efficient heat to power conversions for diverse hot fluid streams associated with geothermal, solar or waste heat sources. Recently, a number of approaches have been developed that address the systematic selection of efficient working fluids as well as the design, integration and control of ORCs. This paper presents a review of emerging approaches with a particular emphasis on computer-aided design methods.

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Comparative analysis of natural and synthetic refrigerants in application to low temperature Clausius–Rankine cycle

Cited by 143 publications

References 10 publications

Enthalpy–entropy compensation for isosteric state adsorption at near ambient temperatures

Enthalpy–entropy compensation for isosteric state adsorption at near ambient temperatures

Waste Heat Utilization in Natural Gas Pipeline Compression Stations by an Organic Rankine Cycle

Systematic Methods for Working Fluid Selection and the Design, Integration and Control of Organic Rankine Cycles—A Review

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