Experimental verification of a rolling-piston expander that applied for low-temperature Organic Rankine Cycle

Zheng, Nan; Zhao, Li; Wang, X.D.; Tan, Yuting

doi:10.1016/j.apenergy.2012.12.030

Cited by 86 publications

(22 citation statements)

References 29 publications

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“…The expander power was 1.5 kW and the pumping work was still not reported. These are similar to the studies of Li et al [17] and Zheng et al [18], in which the expander power was obtained while there were no experimental results for the consumed pumping work. In conclusion, few papers have discussed both the expander power and the consumed pumping work.…”

Section: Introductionsupporting

confidence: 79%

Study on the Characteristics of Expander Power Output Used for Offsetting Pumping Work Consumption in Organic Rankine Cycles

Lei

et al. 2014

Energies

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Abstract:The circulation pump in an organic Rankine cycle (ORC) increases the pressure of the liquid working fluid from low condensing pressure to high evaporating pressure, and the expander utilizes the pressure difference to generate work. A portion of the expander output power is used to offset the consumed pumping work, and the rest of the expander power is exactly the net work produced by the ORC system. Because of the relatively great theoretical pumping work and very low efficiency of the circulation pump reported in previous papers, the characteristics of the expander power used for offsetting the pumping work need serious consideration. In particular, the present work examines those characteristics. It is found that the characteristics of the expander power used for offsetting the pumping work are satisfactory only under the condition that the working fluid absorbs sufficient heat in the evaporator and its specific volume at the evaporator outlet is larger than or equal to a threshold value. OPEN ACCESSEnergies 2014, 7 4958

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Section: Introductionsupporting

confidence: 79%

Study on the Characteristics of Expander Power Output Used for Offsetting Pumping Work Consumption in Organic Rankine Cycles

Lei

et al. 2014

Energies

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“…The issues concerning the rolling piston expander design and its application in the industrial systems utilizing waste or renewable energies are innovative, and not fully described scientifically. The results of initial experiments on a small power ORC system adopting the rolling piston expander system, are reported in [17]. The results of this experiments confirmed that it is possible to feed the rolling piston expander with low-boiling working fluid instead of air.…”

Section: Figuresupporting

confidence: 60%

“…As the use of rolling piston expanders in power systems, and in particular for the expansion of natural gas, is a novel and constantly evolving topic, finding publications containing a sufficient range of experimental data and description of machine geometrical dimensions was difficult. In [17], the results of experimental investigations on the operating conditions of a rolling piston expander applied in the ORC system were presented together with expanders' geometrical dimensions. Basing on data reported in [17] the authors decided to carry out additional computations for R245fa as a working fluid and the same boundary conditions, and the expanders' geometrical dimensions.…”

Section: Modeling Methods and Resultsmentioning

confidence: 99%

“…In [17], the results of experimental investigations on the operating conditions of a rolling piston expander applied in the ORC system were presented together with expanders' geometrical dimensions. Basing on data reported in [17] the authors decided to carry out additional computations for R245fa as a working fluid and the same boundary conditions, and the expanders' geometrical dimensions. For the purpose of the comparison, the shaft rotational speed was simulated in the range of n = 300-700 rpm, similar to the experiment.…”

Section: Modeling Methods and Resultsmentioning

confidence: 99%

“…Encouraged by the advantages of rolling piston expanders described above, as well as by promising experimental results [17], the authors decided to comprehensively assess the suitability of rolling piston expanders for natural gas pressure reduction.…”

Section: Figurementioning

confidence: 99%

See 2 more Smart Citations

Use of Rolling Piston Expanders for Energy Regeneration in Natural Gas Pressure Reduction Stations—Selected Thermodynamic Issues

et al. 2017

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Gas pressure reduction stations are commonly applied to decrease the pressure of natural gas in the transmission pipelines. In such stations, natural gas is expanded in throttling valves without producing any energy. Through the use of expander in natural gas pressure reduction stations, it is possible to recover the pressure energy of the natural gas during expansion, and drive the electrical generator. Possible solutions include turbines and volumetric expanders. However, turbines are complicated and expensive, while volumetric expanders are simple and cheap. This paper presents an analytical modeling of rolling piston expander work conditions when adopted to natural gas expansion. The main objective of this research was therefore a comprehensive analysis of influence of varied sizes of the expander components and natural gas thermal properties at the inlet and at the outlet of the expander, on the expander output power. The analysis presented in this paper indicates that the rolling piston expander is a good alternative to the turbines proposed for energy recovery in natural gas pressure reduction stations.

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Review of innovative approaches of thermo‐mechanical refrigeration systems using low grade heat

2020

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Cooling and refrigeration systems consume around 17% of the worldwide electricity. Enhancing the performance of these systems, using renewable energy resources and waste heat recovered from industrial processes, will lead to reduced fossil fuel consumption. Improvements of these systems using ecofriendly working fluids are of equal importance. Both options contribute to the minimization of the emissions of greenhouse gases and ozone depletion substances. In this paper, a detailed and comprehensive review of the innovative and improvement approaches of the thermo-mechanical refrigeration (TMR)

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Experimental verification of a rolling-piston expander that applied for low-temperature Organic Rankine Cycle

Cited by 86 publications

References 29 publications

Study on the Characteristics of Expander Power Output Used for Offsetting Pumping Work Consumption in Organic Rankine Cycles

Study on the Characteristics of Expander Power Output Used for Offsetting Pumping Work Consumption in Organic Rankine Cycles

Use of Rolling Piston Expanders for Energy Regeneration in Natural Gas Pressure Reduction Stations—Selected Thermodynamic Issues

Review of innovative approaches of thermo‐mechanical refrigeration systems using low grade heat

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