Steam generation system operation optimization in parabolic trough concentrating solar power plants under cloudy conditions

Wang, Anming; Liu, Jiping; Zhang, Shunqi; Liu, Ming; Yan, Junjie

doi:10.1016/j.apenergy.2020.114790

Cited by 25 publications

(14 citation statements)

References 47 publications

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“…For the pump, the outlet enthalpy of the working fluid in the pump ( h out,pp ) and power consumption of the pump ( W pp ) are calculated in Equation (8) and (9). [ 33 ]

h_{out, pp} = h_{in, pp} + \frac{p_{out, pp} - p_{in, pp}}{ρ η_{normals}}

W_{pp} = \frac{h_{out, pp} - h_{in, pp}}{η_{normalm} η_{normale}}

where h out,pp and h in,pp are enthalpies of the working fluid at the outlet and inlet of the pump, kJ kg −1 ; p out,pp and p in,pp are pressures of the working fluid at the outlet and inlet of the pump, kPa; ρ is the density of the working fluid in the pump, kg m −3 ; η s is the isentropic efficiency of the pump; η m is the mechanical efficiency; and η e is the electrical efficiency.…”

Section: Steady‐state Characteristics Analyses Of Cspmentioning

confidence: 99%

“…The exergy efficiencies for power block, energy storage, and CSP are calculated in Equation (15)–(17), respectively. [ 33,38 ]

η_{EX, PB} = \frac{W_{ele}}{Δ E X_{PB}}

η_{EX, ES} = \frac{Δ E X_{ES}}{Δ E X_{ES 0}}

η_{EX, CSP} = \frac{W_{ele}}{E X_{sun}}

where η EX,PB , η EX,ES , and η EX,CSP are the exergy efficiencies for power block, energy storage, and the CSP; W ele is electrical power, W ; Δ EX ES is the specific exergy difference between hot and cold HTF in energy storage, kJ kg −1 ; Δ EX ES0 is the specific exergy difference of HTF in the thermal energy storage condition, kJ kg −1 ; Δ EX PB is the total exergy received by power block, W ; and EX sun is the total exergy received by the solar field, W .…”

Section: Steady‐state Characteristics Analyses Of Cspmentioning

confidence: 99%

“…In addition, the thermal oil branches of live and reheat steam are relatively independent in the parabolic trough CSP plants. [ 33 ] It also offers considerable space for optimization in improving the power block efficiency of CSP plants.…”

Section: Optimization Of Csp Plantmentioning

confidence: 99%

“…[32] For the pump, the outlet enthalpy of the working fluid in the pump (h out,pp ) and power consumption of the pump (W pp ) are calculated in Equation 8and (9). [33]…”

Section: Energy Analysis Modelmentioning

confidence: 99%

See 3 more Smart Citations

Review on Performance Analysis of the Power Block in Concentrated Solar Power Plants

et al. 2020

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“…For the pump, the outlet enthalpy of the working fluid in the pump ( h out,pp ) and power consumption of the pump ( W pp ) are calculated in Equation (8) and (9). [ 33 ]

h_{out, pp} = h_{in, pp} + \frac{p_{out, pp} - p_{in, pp}}{ρ η_{normals}}

W_{pp} = \frac{h_{out, pp} - h_{in, pp}}{η_{normalm} η_{normale}}

Section: Steady‐state Characteristics Analyses Of Cspmentioning

confidence: 99%

“…The exergy efficiencies for power block, energy storage, and CSP are calculated in Equation (15)–(17), respectively. [ 33,38 ]

η_{EX, PB} = \frac{W_{ele}}{Δ E X_{PB}}

η_{EX, ES} = \frac{Δ E X_{ES}}{Δ E X_{ES 0}}

η_{EX, CSP} = \frac{W_{ele}}{E X_{sun}}

Section: Steady‐state Characteristics Analyses Of Cspmentioning

confidence: 99%

Section: Optimization Of Csp Plantmentioning

confidence: 99%

“…[32] For the pump, the outlet enthalpy of the working fluid in the pump (h out,pp ) and power consumption of the pump (W pp ) are calculated in Equation 8and (9). [33]…”

Section: Energy Analysis Modelmentioning

confidence: 99%

See 2 more Smart Citations

Review on Performance Analysis of the Power Block in Concentrated Solar Power Plants

et al. 2020

Self Cite

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show abstract

“…They reported that the highest exergy is obtained in the heat exchangers and collectors by 50.23% and 38.18%. Wang et al [10] studied operation of steam generation system in the presence of a solar collector under cloudy conditions to optimize the system. They reported that the exergy efficiency of plant parasitic power consumption and the thermal energy storage system could change under cloudy conditions.…”

Section: Introductionmentioning

confidence: 99%

Energy and Exergy Analysis of Using Turbulator in a Parabolic Trough Solar Collector Filled with Mesoporous Silica Modified with Copper Nanoparticles Hybrid Nanofluid

et al. 2020

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Designing the most efficient parabolic trough solar collector (PTSC) is still a demanding and challenging research area in solar energy systems. Two effective recommended methods for this purpose that increase the thermal characteristics of PTSCs are adding turbulators and nanofluids. To study the effects of the two approaches on the energy efficiency of PTSCs, a stainless steel turbulator was used and solid nanoparticles of Cu/SBA-15 were added to the water with the volume concentrations of 0.019% to 0.075%. The generated turbulence in the fluid flow was modeled by the SST k–ω turbulent model. The results in daylight demonstrated that energy efficiency increases steadily by 11:30 a.m., and then, starts to drop gradually due to more irradiations at noon. It was observed that applying the turbulator to the studied PTSC has a significant influence on the enhancement of energy efficiency. Adding the nanoparticles augmented the average Nusselt number inside the solar collector in various studied Reynolds numbers. It was also found that the increase in volume concentrations of nanoparticles enhances heat transfer regularly.

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Study on highly efficient high‐temperature steam harvesting using waste energy

Kim

Cho

et al. 2021

Intl J of Energy Research

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In this study, a high-temperature steam generator (HTSG) of cyclone cylindrical type has been developed for energy harvesting applications. Solid refuse fuel (SRF) is considered the thermal energy source. The operating conditions are steam temperature of 773 K, steam pressure of 0.3 to 0.6 MPa, and mass flow rate of 10 to 35 kg/h. The pressure drop of steam in the HTSG is analyzed through numerical methods, which can control the outlet pressure of steam for hydrogen stack application based on the experimental results. The maximum heat transfer efficiency of the HTSG system is 66% at 0.3 MP and 35 kg/ h, which can generate 306 tons per year of high-temperature steam. Moreover, the produced steam can be converted to 15.3 tons of hydrogen. The HTSG system can harvest 767 MWh of energy per year, and it is expected to significantly reduce energy consumption while minimizing the environmental impact.

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Steam generation system operation optimization in parabolic trough concentrating solar power plants under cloudy conditions

Cited by 25 publications

References 47 publications

Review on Performance Analysis of the Power Block in Concentrated Solar Power Plants

Review on Performance Analysis of the Power Block in Concentrated Solar Power Plants

Energy and Exergy Analysis of Using Turbulator in a Parabolic Trough Solar Collector Filled with Mesoporous Silica Modified with Copper Nanoparticles Hybrid Nanofluid

Study on highly efficient high‐temperature steam harvesting using waste energy

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