A review of thermodynamic cycles and working fluids for the conversion of low-grade heat

Chen, Huijuan; Goswami, D. Yogi; Stefanakos, Elias K.

doi:10.1016/j.rser.2010.07.006

Cited by 1,153 publications

(500 citation statements)

References 63 publications

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“…Niedawno ukazał się przegląd termodynamicznych cykli i roboczych czynników, które są proponowane do zagospodarowania ciepła odpadowego [8]. Różne zastosowania organicznego cyklu Rankine'a (ORC) zagospodarowujące niskotemperaturowe ciepło przedstawiono w artykule [53].…”

Section: Organiczny Cykl Rankine'aunclassified

Nowe materiały i procesy w konwersji oraz przechowywaniu energii – wybrane zagadnienia

Zoń

Gnutek

2015

ZN PRz Mechanika

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Section: Organiczny Cykl Rankine'aunclassified

Nowe materiały i procesy w konwersji oraz przechowywaniu energii – wybrane zagadnienia

Zoń

Gnutek

2015

ZN PRz Mechanika

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“…In modern steam cycles within large combustion power plant, the fraction of the expander power consumed by the feed pump, called the back work ratio, is typically only 1% to 3%. Organic Rankine Cycles (ORCs) have been developed in order to make use of lower-temperature heat sources, including geothermal, solar, bio-fuel and surplus process heat [1]. The back work ratio in low-temperature ORCs may be of the order of 10%, making the overall cycle performance increasingly sensitive to the feed pump performance [2].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic performance of new thermofluidic feed pumps for Organic Rankine Cycle applications

Richardson

2016

Applied Energy

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This study develops thermofluidic pump technology that is powered by heat, rather than by electrical or mechanical power. The objective is to improve the performance of heat-recovery by Organic Rankine Cycles, by using a recently-proposed thermofluidic pump. The thermofluidic pump promises low-cost, high-reliability, and, since it does not consume any of the power produced by the expander, improved return on investment. No performance data for the new thermofluidic pump have been reported previously, therefore a thermodynamic model is derived and used to evaluate performance metrics that characterise pump operation and its impact on the overall cycle efficiency. Improved pump configurations are then developed and analysed. A two-stage pump configuration is presented that enhances the thermal efficiency of the cycle. An economiser is also proposed in order to obtain boiler efficiencies similar to those for mechanical feed pumps. It has been shown that the cycle efficiency with the two-stage pump is maximum when there is no net heat input in the intermediate evaporator. The resulting thermal efficiency exceeds the best-possible efficiency that is obtainable with an ideal mechanical pump. The relative improvement in cycle efficiency achieved with the two-stage thermofluidic pump is greatest for low-temperature cycles operating below 100°C, for which the back work ratio is usually higher and the efficiencies of electro-mechanical feed pumps are poorer -yielding a relative increase of the cycle efficiency by up to 30%.

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“…While this approach gives a thorough understanding of each case, it is not clear whether a generalized approach to optimal ORC design is possible. Similarly, organic cycles using a range of working fluids are reviewed by Chen et al [7]. Fluids are grouped according to how dry or wet they are and an effort is made to determine the most appropriate cycle configuration for each group.…”

Section: Introductionmentioning

confidence: 99%

Organic Rankine cycles in waste heat recovery: a comparative study

Auld

Berson

Hogg

2013

Int. J. Low-Carbon Tech.

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A review of thermodynamic cycles and working fluids for the conversion of low-grade heat

Cited by 1,153 publications

References 63 publications

Nowe materiały i procesy w konwersji oraz przechowywaniu energii – wybrane zagadnienia

Nowe materiały i procesy w konwersji oraz przechowywaniu energii – wybrane zagadnienia

Thermodynamic performance of new thermofluidic feed pumps for Organic Rankine Cycle applications

Organic Rankine cycles in waste heat recovery: a comparative study

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