Regulation law of turbine and generator in organic Rankine cycle power generation experimental system

Pan, Lisheng; Wang, Huaixin; Shi, Weixiu

doi:10.1007/s12209-014-2220-z

Cited by 6 publications

(4 citation statements)

References 12 publications

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“…Axis clearance leakage in the turbine rose with the increase of turbine inlet pressure, which leads to a decrease in turbine isentropic efficiency with the increase of turbine inlet pressure. When the turbine speed and generator speed were kept constant, the generator efficiency increased with the decrease of load resistance [38]. The load resistance decreased with the rise of evaporating pressure, so the transmission-generation efficiency increases with the increase of evaporating pressure.…”

Section: Performance Versus Evaporating Pressure With Constant Condenmentioning

confidence: 99%

Experimental Investigation on Performance of an Organic Rankine Cycle System Integrated with a Radial Flow Turbine

Pan

Wang

2019

Energies

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An experimental method is used to investigate the performance of a small-scale organic Rankine cycle (ORC) system which is integrated with a radial flow turbine, using 90 °C hot water as a heat source. The considered working fluids are R245fa and R123. The relationship between cycle performance and the operation parameters is obtained. With constant condensing pressure (temperature), the outlet temperature of the hot water, the mass flow rate of the hot water and the evaporator heat transfer rate increase with increasing evaporating pressure. Turbine isentropic efficiency decreases and transmission-generation efficiency increases with rising evaporating pressure. In the considered conditions, the maximum specific energy is 1.28 kJ/kg, with optimal fluid of R245fa and an optimal evaporating temperature of 69.2 °C. When the evaporating pressure (temperature) is constant, the outlet temperature of the cooling water increases, and the mass flow rate of the cooling water decreases with increasing condensing pressure. Turbine isentropic efficiency increases and transmission-generation efficiency decreases with the rise of condensing pressure. In the considered conditions, the maximum specific energy is 0.89 kJ/kg, with optimal fluid of R245fa and an optimal condensing temperature of 29.1 °C. Turbine efficiency is impacted by the working fluid type, operation parameters and nozzle type.

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Section: Performance Versus Evaporating Pressure With Constant Condenmentioning

confidence: 99%

Experimental Investigation on Performance of an Organic Rankine Cycle System Integrated with a Radial Flow Turbine

Pan

Wang

2019

Energies

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“…In the stable operating condition of the expander, mechanical power outputted by the expander is equal to the power consumed by the load resistance and the losses. Then the load resistance has great relation with the expander rotational speed and the expander torque [4]. This section gives the influence of the load resistance on the operating parameters.…”

Section: Influence Of the Load Resistancementioning

confidence: 99%

“…Pan et al [3] improved the theoretical analysis method of ORC based on radial flow turbine and gave performance of several fluids for ORC using 90 C hot water as heat source. Pan et al [4] also analyzed the regulation method for ORC power generation experimental system. CO 2 and NH 3 are the representatives of the inorganic fluid.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on the CO 2 transcritical power cycle

Pan

Wei

et al. 2016

Energy

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“…A radial outflow turbine also attracted researchers' attention for an ORC power plant [21]. Pan et al [22] used an experimental method to study regulation method in an ORC power generation experimental system and provided regularities in the relationships among turbine speed, load resistance and transmission-generator efficiency.…”

Section: Introductionmentioning

confidence: 99%

Optimization Study on Fluids for the Gravity-Driven Organic Power Cycle

Shi

Pan

2019

Energies

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The organic Rankine cycle (ORC) is efficient in using low-grade heat energy, while low pump efficiency and high pump leakage are usually serious problems. A gravity-driven organic power cycle (GDOPC) uses gravity instead of a pump to pressurize working fluid and has the potential to avoid problems associated with the pump. A theoretical method is used to study the performance and suitability of several fluids for GDOPC. The results show that the flow efficiency in high vertical pipes and the pump efficiency determine whether GDOPC gives better performance than ORC or not. When R245fa is selected as working fluid and evaporating temperature is 62 °C, specific energy of GDOPC (flow efficiency is 80%) is 2.5% higher than that of ORC (pump efficiency is 60%). The improvement degree of specific energy and the liquid column height increase with increasing evaporating temperature. R1234yf and R227ea give good performance with specific energy of 4.84 kJ/kg and 4.82 kJ/kg, respectively, while they need a liquid column as much as 76.55 m and 45.65 m, respectively. Although R365mfc and cyclopentane do not give the most excellent cycle performance, they need liquid column height as low as 9.04 m and 10.88 m, respectively. Fluid with low saturated pressure and high density may need low liquid column height and has the advantage to be used in practical applications.

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Regulation law of turbine and generator in organic Rankine cycle power generation experimental system

Cited by 6 publications

References 12 publications

Experimental Investigation on Performance of an Organic Rankine Cycle System Integrated with a Radial Flow Turbine

Experimental Investigation on Performance of an Organic Rankine Cycle System Integrated with a Radial Flow Turbine

Experimental investigation on the CO 2 transcritical power cycle

Optimization Study on Fluids for the Gravity-Driven Organic Power Cycle

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