Working fluid charge oriented off-design modeling of a small scale Organic Rankine Cycle system

Liu, Liuchen; Zhu, Tong; Ma, Jiacheng

doi:10.1016/j.enconman.2017.06.009

Cited by 36 publications

(12 citation statements)

References 22 publications

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“…Li et al [12] Geothermal source supplying a theoretical 1. relative error of ± 20% and the accuracy on the subcooling predictions was within ± 1.5 K. Liu et al [17] proposed another mass-oriented model to simulate a 3 kWe WHR unit. Their model implemented stateof-the-art correlations to evaluate the heat transfer coefficients and the Lockhard-Martinelli void fraction model to characterize two-phase flows.…”

Section: Imposed Subcoolingmentioning

confidence: 95%

Charge-sensitive modelling of organic Rankine cycle power systems for off-design performance simulation

et al. 2018

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Section: Imposed Subcoolingmentioning

confidence: 95%

Charge-sensitive modelling of organic Rankine cycle power systems for off-design performance simulation

et al. 2018

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“…A boiling temperature of 30 at atmospheric conditions also reinforces the facility of management of this refrigerant as shown in tab. 1 [34][35][36].…”

Section: Selection Of Working Fluidsmentioning

confidence: 99%

“…Lower boiling point and dry saturation curve are some of the various advantages of the refrigerant offer over water which is advantageous for the system efficiency since the steam flowing through the turbine is not a wet mixture [36][37][38].…”

Section: Selection Of Working Fluidsmentioning

confidence: 99%

Thermodynamic investigation of organic Rankine cycle energy recovery system and recent studies

et al. 2018

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Recently, new environment-friendly energy conversion technologies are required for using energy resources valid to power generation. Accordingly, low-grade heat sources as solar heat, geothermal energy, and waste heat, which have available temperatures ranging between 60 and 200 °C, are supposed as applicants for recent new generation energy resources. As an alternative energy source, such low-grade heat sources usage generating electricity with the help of power turbine cycles was examined through this study. Such systems have existing technologies applicable at low temperatures and a compact structure at low cost, however, these systems have a low thermal efficiency of the Rankine cycles operated at low temperatures. An organic Rankine cycle is alike to a conventional steam power plant, except the working fluid, which is an organic, high molecular mass fluid with a liquid-vapor phase change, or boiling point, at a lower temperature than the water-steam phase change. The efficiency of an organic Rankine cycle is about between 10% and 20%, depending on temperature levels and availability of a valid fluid.

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“…In fact, besides the research conducted by the Authors [6][7][8], only two additional studies could be found in the literature. Liu et al [9] discussed the effect of different working fluid charge masses on the system performance. Experimental and numerical analyses were carried out to identify the optimal working fluid charge.…”

Section: Introductionmentioning

confidence: 99%

Effects of the Working Fluid Charge in Organic Rankine Cycle Power Systems: Numerical and Experimental Analyses

Ziviani¹,

Dickes²,

Lemort³

et al. 2018

Organic Rankine Cycle Technology for Heat Recovery

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It is well known that organic Rankine cycle (ORC) power systems often operate in conditions differing from the nominal design point due to variations of the heat source and heat sink conditions. Similar to a vapor compression cycle, the system operation (e.g., subcooling level, pump cavitation) and performance (e.g., heat exchanger effectiveness) of an ORC are affected by the working fluid charge. This chapter presents a discussion of the effects of the charge inventory in ORC systems. In particular, both numerical and experimental aspects are presented. The importance of properly predicting the total amount of working fluid charge for optimizing design and off-design conditions is highlighted. Furthermore, an overview on state-of-the-art modeling approaches is also presented.

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Working fluid charge oriented off-design modeling of a small scale Organic Rankine Cycle system

Cited by 36 publications

References 22 publications

Charge-sensitive modelling of organic Rankine cycle power systems for off-design performance simulation

Charge-sensitive modelling of organic Rankine cycle power systems for off-design performance simulation

Thermodynamic investigation of organic Rankine cycle energy recovery system and recent studies

Effects of the Working Fluid Charge in Organic Rankine Cycle Power Systems: Numerical and Experimental Analyses

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