scholarly journals Leveraging Energy Storage in a Solar-Tower and Combined Cycle Hybrid Power Plant

Energies ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 40 ◽  
Author(s):  
Kevin Ellingwood ◽  
Seyed Safdarnejad ◽  
Khalid Rashid ◽  
Kody Powell
Keyword(s):  
Solar Activity ◽  
Power Plant ◽  
Solar Energy ◽  
Combined Cycle ◽  
Energy Utilization ◽  
Base Case ◽  
Solar Fraction ◽  
Charging Rate ◽  
Solar Energy Utilization ◽  
Collector Temperature

A method is presented to enhance solar penetration of a hybrid solar-combined cycle power plant integrated with a packed-bed thermal energy storage system. The hybrid plant is modeled using Simulink and employs systems-level automation. Feedback control regulates net power, collector temperature, and turbine firing temperature. A base-case plant is presented, and plant design is systematically modified to improve solar energy utilization. A novel recycling configuration enables robust control of collector temperature and net power during times of high solar activity. Recycling allows for improved solar energy utilization and a yearly solar fraction over 30%, while maintaining power control. During significant solar activity, excessive collector temperature and power setpoint mismatch are still observed with the proposed recycling configuration. A storage bypass is integrated with recycling, to lower storage charging rate. This operation results in diverting only a fraction of air flow to storage, which lowers the storage charging rate and improves solar energy utilization. Recycling with a storage bypass can handle larger solar inputs and a solar fraction over 70% occurs when following a drastic peaking power load. The novel plant configuration is estimated to reduce levelized cost of the plant by over 4% compared to the base-case plant.

Study on a New Solar Thermal Energy Complementary Power Generation System Based on Gas-Steam Combined Cycle

2019 ◽  
Author(s):  
Duan Liqiang ◽  
Lv Zhipeng ◽  
Wang Zhen
Keyword(s):  
Power Generation ◽  
Solar Energy ◽  
Thermal Efficiency ◽  
Combined Cycle ◽  
Energy Utilization ◽  
Solar Thermal ◽  
Solar Power Generation ◽  
Cycle System ◽  
Solar Energy Utilization ◽  
New System

Abstract The integrated solar energy-driven chiller combined cycle system (SCCC) has a problem of low annual solar energy utilization. The solar thermal efficiency and power output of the traditional integrated solar combined cycle system (ISCC) are limited by the integrated solar mirror field area and Rankine cycle efficiency. This paper presents a new system, on the basis of the combined cycle system with the three pressure HRSG with reheat, the solar energy is integrated into the chiller for cooling the compressor inlet air of gas turbine and the heat recovery steam generator (HRSG) for increasing the power output simultaneously. The Aspen Plus, TRNSYS and EBSILON softwares are applied in this paper to build the models of the overall system. The solar thermal efficiency, annual solar power generation and annual solar thermal efficiency are used to evaluate the performances of the new system, the traditional ISCC system and SCCC system. During the summer solstice, the proportions of solar energy used in cooling and heating are set as 40% and 60% in new system, respectively. The research results show that the new system has a higher power output (406.37MW), thermal cycle efficiency (53.61%) and solar thermal efficiency (48.85%) compared with the traditional ISCC system (385.63MW, 51.67%, and 24.43%, respectively) at the design point. The new system can regulates the proportions of solar energy used in the chiller and HRSG based on the monthly meteorological data, in order to maximize the annual solar energy utilization and annual solar power generation. The new system’s annual solar energy utilization hours (2071h) and solar power generation (25.863GW·h) are far greater than those of SCCC system (1498h, 18.185GW·h, respectively). Therefore, the proposed new system with the simultaneous integrations of solar energy with both the chiller and HRSG not only greatly increases the utilization rate of solar energy, but also has the significant thermodynamic advantages.

scholarly journals HYDROGEN PRODUCED BY SOLAR ENERGY AND THEIR USE AS CLEAN FUEL FOR POWER GENERATION IN A COMBINED CYCLE POWER PLANT

2016 ◽  
Vol 15 (1) ◽  
pp. 41
Author(s):  
J. C. Restrepo ◽  
O. J. Venturini ◽  
E. E. Silva ◽  
L. A. Cortabarria
Keyword(s):  
Power Generation ◽  
Power Plant ◽  
Solar Energy ◽  
Electricity Generation ◽  
Combined Cycle ◽  
Energy Utilization ◽  
Main Process ◽  
Clean Fuel ◽  
Combined Cycle Power Plant ◽  
Production Of Hydrogen

The solar energy is one of the most promising energy sources expected for the future, due at their huge potential and the wide availability around the world. However, nowadays this important source of energy is not being harnessed or even addressed in their full potential. According to the last statements, it is important to develop solar energy conversion systems of high efficiency, as well as spreading its use in other forms besides the traditional systems of electric power generation or heating systems. For this reason, in this paper, it is explored the production of hydrogen through solar energy utilization, and the later electrical energy production by burning the produced hydrogen in a combined cycle power plant. The process was modelled for 3 MWe of electricity generation, and using the organic Rankine cycle. The main process for producing hydrogen from water using solar energy is based on a two steps redox thermochemical cycle, which has a theoretical conversion efficiencies of 54% at 1600 K. It is expected that this paper could contributed to the development of ways to enable a better integration of the solar energy with the current electricity generation technologies, as well as to incentive the use of the hydrogen as a clean fuel.

Sandwich hydrogel with confined plasmonic Cu/carbon cells for efficient solar water purification

2021 ◽  
Author(s):  
Cheng Tian ◽  
Chengcheng Li ◽  
Delun Chen ◽  
Yifan Li ◽  
LEI XING ◽  
...  
Keyword(s):  
Solar Energy ◽  
Water Purification ◽  
Low Cost ◽  
Energy Utilization ◽  
Solar Water ◽  
Solar Energy Utilization

Designing low-cost and efficient evaporation system to maximize solar energy utilization is of great importance for the emerging solar water purification technologies. Herein, we demonstrate a universal sandwich hydrogel by...

Nanowire-based zinc-doped tin oxide microtubes for enhanced solar energy utilization efficiency

2017 ◽  
Vol 43 (9) ◽  
pp. 6822-6830 ◽  
Author(s):  
Wutao Mao ◽  
Zhengdao Li ◽  
Keyan Bao ◽  
Kaijun Zhang ◽  
Weibo Wang ◽  
...  
Keyword(s):  
Solar Energy ◽  
Tin Oxide ◽  
Energy Utilization ◽  
Utilization Efficiency ◽  
Solar Energy Utilization

Light manipulation in a dually ordered porous TiO2–rGO composite for efficient solar energy utilization

2017 ◽  
Vol 4 (4) ◽  
pp. 578-580 ◽  
Author(s):  
Xiaoyong Lai
Keyword(s):  
Solar Energy ◽  
Light Response ◽  
Energy Utilization ◽  
Porous Tio2 ◽  
Light Manipulation ◽  
Solar Energy Utilization ◽  
Ordered Porous

A dually ordered macro-mesoporous TiO2–rGO composite with tunable light response was developed for efficient solar energy utilization.

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