Thermo-economic optimization of RSORC (regenerative solar organic Rankine cycle) considering hourly analysis

Hajabdollahi, Hassan; Ganjehkaviri, A.; Jaafar, Mohammad Nazri Mohd.

doi:10.1016/j.energy.2015.04.113

Cited by 55 publications

(15 citation statements)

References 32 publications

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“…To obtain an efficient ORC, the organic fluid should be carefully selected. A number of researches [12][13][14][15][16] have studied the selection of the ORC system. One of the typical recommended organic fluid types used to operate the ORC is R245fa.…”

Section: System Descriptionsmentioning

confidence: 99%

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Exergy Analysis of Two Kinds of Solar-Driven Cogeneration Systems in Lhasa, Tibet, China

Zhang

Lei

et al. 2018

International Journal of Photoenergy

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In this study, an exergy analysis of two kinds of solar-driven cogeneration systems consisting of solar collectors and an organic Rankine cycle (ORC) is presented for series mode and parallel mode. Three kinds of solar collectors are considered: flat-plate collectors (FPC), evacuated tube collectors (ETC), and parabolic trough collectors (PTC). This study mainly compares the exergy output of the two kinds of solar cogeneration systems under different temperatures of the return heating water and different inlet temperatures of the solar collectors. This study shows that, from the perspective of Wnet or E̲n, the parallel mode is superior to the series mode. From the perspective of Ez, the parallel mode is superior to the series mode when the solar collector is FPC; however, the series mode is superior to the parallel mode when the solar collector is PTC. When the solar collector is ETC, the result depends on the temperature of the return heating water. When the temperature of the return heating water is low (below 46°C), the series mode is better, and when the temperature of the return heating water is high (above 46°C), the parallel mode is better.

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Section: System Descriptionsmentioning

confidence: 99%

“…A large part of the heat exchanged by the condenser comes from the evaporating water, so an evaporative condenser is mainly a wet bulb sensitive device [22]. The condensing temperature can be calculated by (16), where T wb is the web bulb temperature of the outside air.…”

Section: System Descriptionsmentioning

confidence: 99%

Exergy Analysis of Two Kinds of Solar-Driven Cogeneration Systems in Lhasa, Tibet, China

Zhang

Lei

et al. 2018

International Journal of Photoenergy

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“…ORC were modeled by the means of different supplier in some researches. Regenerative solar ORC as well as ORC for diesel engine waste heat recovery was modeled and optimized by Hajabdollahi et al [21,22]. The design parameters were nominal capacity of diesel engine, diesel operating partial load, evaporator pressure, condenser pressure and refrigerant mass flow rate.…”

Section: Introductionmentioning

confidence: 99%

Investigating the effects of load demands on selection of optimum CCHP-ORC plant

Hajabdollahi

2015

Applied Thermal Engineering

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“…Some studies have been focused on the dynamic model of the SORC. Hajabdollahi et al [13] optimized the RSORC by hourly analysis considering evaporator pressure, condenser pressure, refrigerant mass flow rate, number of solar panel (solar collector), and storage capacity. Bamgbopa et al [14] found that the evaporator and the condenser are critical components of the simplified transient modeling using R245fa.…”

Section: Introductionmentioning

confidence: 99%

Dynamic performance analysis of solar organic Rankine cycle with thermal energy storage

2018

Applied Thermal Engineering

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HighlightsA dynamic model of SORC was developed considering time-varying solar radiation. The factor FSR was defined to reflect the effect of TES on dynamic impact. Resonance occurs by the combined effect of TES capacity and solar disturbance. AbstractThis paper discusses the dynamic performance in a small-scale solar organic Rankine cycle (SORC) with thermal energy storage (TES) considering solar disturbance. A dynamic model of SORC is developed. The factor FSR (Fluctuation Suppression Ratio) is defined to reflect the effect of TES on suppressing the dynamic impact. The dynamics of the SORC are found to contain resonance characteristics. With the interaction between solar disturbances and system thermal inertia (mainly determined by TES capacity), the energy superposition could cause dynamic resonance. In order to study the dynamic performance of the SORC, the influence factor including TES capacity, solar fluctuation (period, amplitude, average solar) and evaporation temperature were analysed, while FSR and the total system efficiency were the indicators which represent the system stability and performance respectively. The simulation result shows that within a certain solar period, there is a specific TES capacity range leading to resonance. The proper TES capacity should be selected according to local solar fluctuations to effectively suppress dynamic impact in the initial design phase.

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Thermo-economic optimization of RSORC (regenerative solar organic Rankine cycle) considering hourly analysis

Cited by 55 publications

References 32 publications

Exergy Analysis of Two Kinds of Solar-Driven Cogeneration Systems in Lhasa, Tibet, China

Exergy Analysis of Two Kinds of Solar-Driven Cogeneration Systems in Lhasa, Tibet, China

Investigating the effects of load demands on selection of optimum CCHP-ORC plant

Dynamic performance analysis of solar organic Rankine cycle with thermal energy storage

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