Thermodynamic analysis of an idealised solar tower thermal power plant

Zheng, Hongfei; Xu, Yuanli; Su, Yuehong; Riffat, Saffa; Xiong, Jianyin

doi:10.1016/j.applthermaleng.2015.02.005

Cited by 24 publications

(8 citation statements)

References 14 publications

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“…In the system shown in Figure 1, it is assumed that the solar irradiance input to the heliostat field of the STPP system is denoted by I s , the concentration ratio of the system is denoted by C, the light entrance area of the receiver is A R , the absorptivity of the receiver is α R , the surface operating temperature of the receiver is T R , the ambient temperature is T 0 , and the radiation heat transfer from the environment to the receiver surface is negligible. The useful heat that can be obtained by the receiver can be written as [11]:…”

Section: Theoretical Model Of Solar Power Tower Plant Combined With Mmentioning

confidence: 99%

“…where ε R is emissivity of the receiver surface, h c is convective heat transfer coefficient between receiver and environment, and σ is the Stefan-Boltzmann constant. Reference [11] gives a thermodynamic analysis for an idealized solar tower power plant, and proposes a relation between power output and system operating or structural parameters:…”

Section: Theoretical Model Of Solar Power Tower Plant Combined With Mmentioning

confidence: 99%

“…In this paper, a set of low-temperature multi-effect seawater desalination system is adopted to substitute the condenser to achieve the dual-purpose power plant. Based on the endoreversible heat engine model in Reference [11], the heat released from the system is calculated as:…”

Section: Thermo-economic Modelmentioning

confidence: 99%

“…Yang [9] and Behar [10] compared and analyzed the economics of STPPs in actual operation and presented the optimum operating conditions for specific power plants. Zheng et al [11] proposed an ideal model for STPPs, and analyzed its performance based on the endoreversible engine model, to give the optimum operating condition, including the optimum receiver temperature and the optimum efficiency of an endoreversible heat engine. Ye et al [12] discussed the economics for a power plant based on an ideal STPP model, to calculate the most economical operating condition.…”

Section: Introductionmentioning

confidence: 99%

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Thermo-Economic Optimization of an Idealized Solar Tower Power Plant Combined with MED System

Zheng

Zhao

Liang

et al. 2018

Entropy

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Based on the reversible heat engine model, theoretical analysis is carried out for economic performance of a solar tower power plant (STPP) combined with multi-effect desalination (MED). Taking total revenue of the output power and the fresh water yield per unit investment cost as the economic objective function, the most economical working condition of the system is given by analyzing the influence of the system investment composition, the receiver operating temperature, the concentration ratio, the efficiency of the endoreversible heat engine, and the relative water price on the economic parameters of the system. The variation curves of the economic objective function are given out when the main parameter is changed. The results show that the ratio of water price to electricity price, or relative price index, has a significant impact on system economy. When the water price is relatively low, with the effect numbers of the desalination system increasing, and the economic efficiency of the overall system worsens. Only when the price of fresh water rises to a certain value does it make sense to increase the effect. Additionally, the threshold of the fresh water price to the electricity price ratio is 0.22. Under the conditions of the current price index and the heliostat (or reflector), the cost ratio and the system economy can be maximized by selecting the optimum receiver temperature, the endoreversible heat engine efficiency, and the optimum concentration ratio. Given the receiver surface temperature and the endoreversible heat engine efficiency, increasing the system concentration ratio of the heliostat will be in favor of the system economy.

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Section: Theoretical Model Of Solar Power Tower Plant Combined With Mmentioning

confidence: 99%

Section: Theoretical Model Of Solar Power Tower Plant Combined With Mmentioning

confidence: 99%

Section: Thermo-economic Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermo-Economic Optimization of an Idealized Solar Tower Power Plant Combined with MED System

Zheng

Zhao

Liang

et al. 2018

Entropy

Self Cite

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“…They found out that, the part with the most irreversibility in boilers is the combustion chamber. In 2015, Zheng et al analyzed thermodynamically a thermal power plant with a solar tower. They studied the effects of various parameters on the exergy performance of a power plant.…”

Section: Introductionmentioning

confidence: 99%

Exergy analysis of a hybrid solar‐fossil fuel power plant

Vakilabadi

Bidi

Najafi

et al. 2019

Energy Science & Engineering

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In this study, exergy analysis, energy analysis, and mathematical modeling are performed in a 35 MW solar‐fossil fuel power plant. The losses of exergy and energy in different components and also changes of the efficiency of exergy and energy are analyzed at a specific day, 20th June. The assumed power plant in this study is Solar Electric Generating Station VI (SEGS VI), located in California's Mojave Desert. A parametric study, under different working conditions, including different working pressures, temperatures, collector output temperature, steam flow rate, and heat transfer fluid (HTF) flow rate is studied and the effect of variation of parameters on the performance of the plant is investigated. Authors found that, the maximum exergy loss happens in the collector and the maximum energy loss occurs in the condenser. Energy analysis shows that 47% of the total loss energy in the cycle happens in the condenser, as the main component that wastes energy. From exergy analysis, the collector and then boiler are the main components wasting exergy where 68.32% of total exergy loss occurs in these two components in hybrid mode (solar‐fossil fuel). Exergy and Energy efficiency variations throughout the day show that minimum exergy efficiency (32.7%) and maximum energy efficiency (23%) occurs at 12 am. Exergy efficiency variation versus turbine inlet pressure shows that the maximum exergy efficiency (26%) accure at 95 bar. The changes of the absorbed heat and solar irradiation of the 20th of June shows a good agreement with the measured data in validated reference.

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Performance assessment of a solar tower‐based multigeneration system with thermal energy storage

2019

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In this study, a thermodynamic analysis of a newly developed solar power tower‐based multigeneration plant is presented. This plant is integrated with thermal energy storage option in order to overcome intermittency of solar radiation. The proposed integrated multigenerational plant consists of the solar tower with thermal energy storage, Rankine cycle, organic Rankine cycle, absorption cooling cycle, hydrogen production and compression unit, hot water production and drying process. The overall energy and exergy efficiencies of integrated plant are determined as 54.15% and 51.28%, respectively. Also, some parametric analyses are carried out to investigate how the system variables affect the performance of the present system.

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Thermodynamic analysis of an idealised solar tower thermal power plant

Cited by 24 publications

References 14 publications

Thermo-Economic Optimization of an Idealized Solar Tower Power Plant Combined with MED System

Thermo-Economic Optimization of an Idealized Solar Tower Power Plant Combined with MED System

Exergy analysis of a hybrid solar‐fossil fuel power plant

Performance assessment of a solar tower‐based multigeneration system with thermal energy storage

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