Proposition of a critical design direct normal irradiance for solar thermal power plant

Liu, Jiangwei; Zeng, Zhiyong; Liu, Gang; Li, Yuqiang

doi:10.1002/er.4138

Cited by 6 publications

(2 citation statements)

References 27 publications

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“…Solar heat power generation stations usually adopt heat storage measures so as to solve solar energy instability problem. Therefore, in the solar thermal power generation unit, the heat storage technology plays an essential part, and capacity of its efficient heat storage as well as release is particularly important [5]. The solar thermal power generation unit can store the surplus heat by melting latent heat through solid-liquid phase change by adopting phase change heat storage technology [6].…”

Section: Introductionmentioning

confidence: 99%

Analysis of thermal storage performances of solar thermal power generation unit using computer numerical simulation analysis

2020

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Objective: In this study, the single tank inclined layer heat storage system is simulated and analyzed by computer, so as to explore the performance of the heat storage device of the solar thermal generator system. Method: First of all, for the phase change thermal storage unit, its physical model of is established. Heat transfer fluid is Hitec salt, and phase change material is potassium nitrate. Then, as for the phase change thermal storage unit, its numerical model of is established. The simulation results of the numerical model are verified. Finally, through numerical simulation, how do the inlet velocity of the heat exchange fluid and the ambient temperature influence the heat storage performance is analyzed. Results: The heat storage period of the regenerator will decrease when the inlet velocity of the heat exchange fluid increases, but the heat storage efficiency of the regenerator will decrease. Therefore, in this study, under the premise of ensuring a higher heat storage efficiency and a shorter heat storage cycle, it is more reasonable to choose 0.25 m/s as the inlet velocity. In winter and summer, it is necessary to insulate the tank. On the one hand, the heat loss can be reduced. On the other hand, the heat storage efficiency of single tank can be improved. Conclusion: Analysing the efficiency of the single tank thermal storage device can provide a reference for the optimal design of the solar heat plant thermal storage tank, and lay a certain foundation for its theoretical and experimental research.

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Section: Introductionmentioning

confidence: 99%

Analysis of thermal storage performances of solar thermal power generation unit using computer numerical simulation analysis

2020

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“…Insulation thickness was also found to only slightly prevent heat loss from the thermal storage tanks after the first 5 cm. Liu et al designed a model which used to analyze the effect of various factors like solar multiple, design direct normal irradiance (DNI), TES size, and dispatch fraction on solar energy usage efficiency. They found that critical design DNI can be reduced by increasing storage size and the dispatch fraction.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis of energy storage supported multigeneration system

et al. 2019

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This article investigates the thermodynamic performance of a solar‐powered integrated multigeneration system with thermal storage. It aims at evaluating the effect of thermal storage on the overall performance of a multigeneration system. A solar heliostat field system, thermal energy storage, Rankine power cycle, electrolyzer, and a double effect absorption chiller make up the multigeneration system. Energy and exergy analyses of the system are performed, and the energy and exergy efficiencies are found to be 35.03% and 27.9%, respectively. The solar heliostat and receiver system obtained 3500 kW of heat, the thermal storage system had a thermal efficiency of 87.4% with the capacity to store 2700 kWth energy for 12 hours, the Rankine cycle produced 1068 kW of electricity and the electrolyzer which receives 20% of the net power produced was able to generate 0.0009035 kg/s of hydrogen. The absorption chiller also produced 271.9 kW of cooling. Furthermore, a parametric study was carried out to observe the effect of varying factors like direct normal irradiance (DNI), the mass fraction of the steam bled from the turbine (j), the pressure of the high‐temperature generator (HTG) inlet steam, and a combination of the DNI and the pressure of the HTG inlet steam on the system performance. While an increase in the DNI led to an improved thermal and exergetic efficiency, the addition of storage led to an increase of 27.7% in the utilization factor of the multigeneration system which means that the performance of the system is increased over time.

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Techno and economic assessment of dry cooling option for concentrated solar power (CSP) plant in the desert region

Bhogilla

Sreekanth

2023

Materials Today: Proceedings

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Proposition of a critical design direct normal irradiance for solar thermal power plant

Cited by 6 publications

References 27 publications

Analysis of thermal storage performances of solar thermal power generation unit using computer numerical simulation analysis

Analysis of thermal storage performances of solar thermal power generation unit using computer numerical simulation analysis

Thermodynamic analysis of energy storage supported multigeneration system

Techno and economic assessment of dry cooling option for concentrated solar power (CSP) plant in the desert region

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