Experimental investigation of a scroll expander for an organic Rankine cycle

Tarique, Md.; Dinçer, İbrahim; Zamfirescu, Calin

doi:10.1002/er.3189

Cited by 22 publications

(16 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Oralli and Tarique investigate using a refrigeration scroll compressor as an expander for power generation applications using a Rankine cycle [35,36]. They develop a model applicable to using a scroll expander for determining the expansion process details, dissipation and leakage losses [36].…”

Section: Thermodynamic Analysismentioning

confidence: 99%

“…They develop a model applicable to using a scroll expander for determining the expansion process details, dissipation and leakage losses [36]. Figure 2 is the system diagram of the model proposed by Tarique [36]. The model considers isentropic expansion, which is limited by the built in volumetric ratio.…”

Section: Thermodynamic Analysismentioning

confidence: 99%

“…This is used to determine state 2v in Figure 2. The isochoric pressure building coefficient is defined as follows [36]:…”

Section: Thermodynamic Analysismentioning

confidence: 99%

See 2 more Smart Citations

Selection of Optimum Working Fluid for Organic Rankine Cycles by Exergy and Exergy-Economic Analyses

et al. 2015

View full text Add to dashboard Cite

Abstract:The thermodynamic performance of a regenerative organic Rankine cycle that utilizes low temperature heat sources to facilitate the selection of proper organic working fluids is simulated. Thermodynamic models are used to investigate thermodynamic parameters such as output power, and energy efficiency of the ORC (Organic Rankine Cycle). In addition, the cost rate of electricity is examined with exergo-economic analysis. Nine working fluids are considered as part of the investigation to assess which yields the highest output power and exergy efficiency, within system constraints. Exergy efficiency and cost rate of electricity are used as objective functions for system optimization, and each fluid is assessed in terms of the optimal operating condition. The degree of superheat and the pressure ratio are independent variables in the optimization. R134a and iso-butane are found to exhibit the highest energy and exergy efficiencies, while they have output powers in between the systems using other working fluids. For a source temperature was equal to 120 °C, the exergy efficiencies for the systems using R134a and iso-butane are observed to be 19.6% and 20.3%, respectively. The largest exergy destructions occur in the boiler and the expander. The electricity cost rates for the system vary from 0.08 USD/kWh to 0.12 USD/kWh, depending on the fuel input cost, for the system using R134a as a working fluid. OPEN ACCESSSustainability 2015, 7 15363

show abstract

Section: Thermodynamic Analysismentioning

confidence: 99%

Section: Thermodynamic Analysismentioning

confidence: 99%

See 1 more Smart Citation

Selection of Optimum Working Fluid for Organic Rankine Cycles by Exergy and Exergy-Economic Analyses

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Referring to Equation (12), the electrical efficiency of the ORC system relates to the performance characteristics of the scroll expander. To evaluate the effects of resistive load on scroll expander isentropic and volumetric efficiencies, the investigation is carried out under the optimal pressure ratio operating condition for the six resistive loads.…”

Section: Variations Of Electrical Efficiency and Scroll Expander Effimentioning

confidence: 99%

“…Qiu et al [11] evaluated several expansion devices for micro-CHP ORC systems including turbine, scroll, screw and vane expanders, and suggested that both scroll and vane expanders are suitable for micro-scale ORC systems with capacity ranging from 1kW to 10kW. Ali Tarique et al [12] stated that a scroll expander is the best choice for small capacities due to the more flexible operation characteristic. As a scroll expander is a positive displacement machine with a fixed expansion ratio, a high efficiency could be achieved at a specific pressure ratio [13].…”

Section: Introductionmentioning

confidence: 99%

Effect of resistive load on the performance of an organic Rankine cycle with a scroll expander

Zhu

Chen

Huang

et al. 2016

Energy

View full text Add to dashboard Cite

A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. AbstractAn experimental investigation is performed for an organic Rankine cycle system with different electrical resistive loads. The test rig is set up with a small scroll expander-generator unit, a boiler and a magnetically coupled pump. R134a is used as the working fluid in the system. The experimental results reveal that the resistive load coupled to the scroll expandergenerator unit affects the expander performance and power output characteristics. It is found that an optimum pressure ratio exists for the maximum power output. The optimal pressure ratio of the expander decreases markedly as the resistive load gets higher. The optimum pressure ratio of the scroll expander is 3.6 at a rotation speed of 3450 r/min for a resistive load of 18.6 Ω. The maximum electrical power output is 564.5W and corresponding isentropic and volumetric efficiencies are 78% and 83% respectively.

show abstract

A trapezoidal cycle with theoretical model based on organic Rankine cycle

2016

Int. J. Energy Res.

View full text Add to dashboard Cite

Summary Based on organic Rankine cycle (ORC), a trapezoidal cycle with theoretical model is proposed and built according to the trapezoidal configuration and the thermodynamic relation in T–s diagram. Simulations show that the relative deviation between trapezoidal cycle and ORC is lower than 5% within evaporation temperature of 5 °C lower than the critical temperature of the working fluids. Empirical equations to calculate the optimal evaporation temperature, the maximum net power output and the corresponding thermal efficiency are built, which relative deviations from ORC are lower than 4%. Trapezoidal cycle can break through the restrictions of the actual working fluids and the configuration of the ORC to extend the study of the ORC and investigate the general principle of the ORC (or the trapezoidal cycle). Trapezoidal cycle can develop to trilateral cycle or Carnot cycle, which are the boundary cycles of the trapezoidal cycle. Trapezoidal cycle can be used as a general cycle to investigate the relations and principles among the trilateral cycle, Carnot cycle and trapezoidal cycle (or ORC). The performance of these three cycles at maximum power and their relations are investigated in the same conditions of finite heat source. Results show that the maximum power and the corresponding thermal efficiency of the trapezoidal cycle are bounded between Carnot cycle and trilateral cycle. Copyright © 2016 John Wiley & Sons, Ltd.

show abstract

Experimental investigation of a scroll expander for an organic Rankine cycle

Cited by 22 publications

References 15 publications

Selection of Optimum Working Fluid for Organic Rankine Cycles by Exergy and Exergy-Economic Analyses

Selection of Optimum Working Fluid for Organic Rankine Cycles by Exergy and Exergy-Economic Analyses

Effect of resistive load on the performance of an organic Rankine cycle with a scroll expander

A trapezoidal cycle with theoretical model based on organic Rankine cycle

Contact Info

Product

Resources

About