Thermoeconomic analysis of a CO2 plume geothermal and supercritical CO2 Brayton combined cycle using solar energy as auxiliary heat source

2020 ◽  
Vol 256 ◽  
pp. 120374 ◽  
Author(s):  
Zongliang Qiao ◽  
Yue Cao ◽  
Peiyu Li ◽  
Xingchao Wang ◽  
Carlos E. Romero ◽  
...  
Keyword(s):  
Solar Energy ◽  
Heat Source ◽  
Supercritical Co2 ◽  
Combined Cycle ◽  
Co2 Plume

scholarly journals Thermodynamic analysis and simulation of a new combined power and refrigeration cycle using artificial neural network

2011 ◽  
Vol 15 (1) ◽  
pp. 29-41 ◽  
Author(s):  
Abdolreza Fazeli ◽  
Hossein Rezvantalab ◽  
Farshad Kowsary
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Heat Source ◽  
Exergy Efficiency ◽  
Combined Cycle ◽  
Cycle Performance ◽  
Working Fluid ◽  
Refrigeration Cycle ◽  
Water Mixture ◽  
Artificial Neural

In this study, a new combined power and refrigeration cycle is proposed, which combines the Rankine and absorption refrigeration cycles. Using a binary ammonia-water mixture as the working fluid, this combined cycle produces both power and refrigeration output simultaneously by employing only one external heat source. In order to achieve the highest possible exergy efficiency, a secondary turbine is inserted to expand the hot weak solution leaving the boiler. Moreover, an artificial neural network (ANN) is used to simulate the thermodynamic properties and the relationship between the input thermodynamic variables on the cycle performance. It is shown that turbine inlet pressure, as well as heat source and refrigeration temperatures have significant effects on the net power output, refrigeration output and exergy efficiency of the combined cycle. In addition, the results of ANN are in excellent agreement with the mathematical simulation and cover a wider range for evaluation of cycle performance.

scholarly journals Performance Study of a Novel Integrated Solar Combined Cycle System

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3400 ◽  
Author(s):  
Liqiang Duan ◽  
Zhen Wang
Keyword(s):  
Solar Energy ◽  
Meteorological Data ◽  
Lithium Bromide ◽  
Combined Cycle ◽  
Air Cooling ◽  
Absorption Refrigeration ◽  
Performance Study ◽  
Levelized Cost Of Electricity ◽  
Cycle System ◽  
New System

Based on a traditional integrated solar combined cycle system, a novel integrated solar combined cycle (ISCC) system is proposed, which preferentially integrates the solar energy driven lithium bromide absorption refrigeration system that is used to cool the gas turbine inlet air in this paper. Both the Aspen Plus and EBSILON softwares are used to build the models of the overall system. Both the thermodynamic performance and economic performance of the new system are compared with those of the traditional ISCC system without the inlet air cooling process. The new system can regulate the proportions of solar energy integrated in the refrigerator and the heat recovery steam generator (HRSG) based on the daily meteorological data, and the benefits of the solar energy integrated with the absorption refrigeration are greater than with the HRSG. The results of both the typical day performance and annual performance of different systems show that the new system has higher daily and annual system thermal efficiencies (52.90% and 57.00%, respectively), higher daily and annual solar photoelectric efficiencies (31.10% and 22.31%, respectively), and higher daily and annual solar photoelectric exergy efficiencies (33.30% and 23.87%, respectively) than the traditional ISCC system. The solar energy levelized cost of electricity of the new ISCC system is 0.181 $/kW·h, which is 0.061 $/kW·h lower than that of the traditional ISCC system.

Study on Solar Assisted Different Heat Source Heating for School Building in Rural of Gansu

2014 ◽  
Vol 587-589 ◽  
pp. 315-319
Author(s):  
Cai Qin Hou ◽  
Hui Hou
Keyword(s):  
Carbon Dioxide ◽  
Solar Energy ◽  
Heat Source ◽  
Water Supply ◽  
Carbon Dioxide Emissions ◽  
Residential Buildings ◽  
Gansu Province ◽  
Hot Water ◽  
Depth Analysis ◽  
Hot Water Supply

Gansu province is rich in solar energy resources ,solar energy is clean and reproducible energy,it has an important advantage once we use solar energy in heating,supplying hot water in residential buildings. In the vast rural areas of Gansu, carbon emissions is huge because of slow way of heating and dirty fuel,such as briquette ,straw and so on. In this paper, we have a in-depth analysis on different forms of solar assisted heat source for hot water supply and heating, focusing on energy-saving effect, carbon dioxide emissions,and total energy deficit.The results show solar assisted biomass boiler is a worthy manner for heating and hot water supply ,it can save energy more than 60%. More important is it can reduce carbon dioxide emissions large extently.

Regeneration Characteristics of Adsorbent in the Integrated Desiccant/Collector

1993 ◽  
Vol 115 (3) ◽  
pp. 169-175 ◽  
Author(s):  
Y. Saito
Keyword(s):  
Solar Radiation ◽  
Solar Energy ◽  
Heat Source ◽  
Silica Gel ◽  
Solar Collector ◽  
Efficient Regeneration

This study presents a solar desiccant system using an adsorbent in an “integrated desiccant/solar collector” that uses direct solar energy as a heat source for efficient regeneration of the adsorbent. The objective of this study is to investigate an integrated desiccant/collector in which the adsorbent absorbs solar radiation fully and is heated for regeneration. Another objective is to obtain the regeneration characteristics in the equipment proposed by both experiments and simulations. Throughout this study, silica gel is used as the adsorbent.

Analysis of a Combined Power and Refrigeration Cycle Working on Solar Energy

2008 ◽  
Author(s):  
Bijan Kumar Mandal ◽  
Kousik Sadhukhan ◽  
Achin Kumar Chowdhuri ◽  
Arup Jyoti Bhowal
Keyword(s):  
Solar Energy ◽  
Working Conditions ◽  
Exergy Efficiency ◽  
Combined Cycle ◽  
Cooling Effect ◽  
Second Law ◽  
Carnot Cycle ◽  
Refrigeration Cycle ◽  
Water Mixture ◽  
The Ideal

Thermodynamic analysis of a combined cycle producing power and refrigeration (cooling) effect simultaneously using solar energy has been analyzed. The working substance of the cycle is a binary mixture of ammonia and water. The effect of variation of absorber pressure, boiler pressure, boiler temperature and superheater temperature on the turbine work, refrigeration (cooling) effect and net output has been investigated. For different conditions of the above variables, the first law efficiency, the second law efficiency and the exergy efficiency of the cycle have been investigated. Since the ammonia water mixture boils at varying temperatures, Lorenz cycle instead of Carnot cycle is considered as the ideal cycle for this analysis. It is observed that the first law and the second law efficiencies are maximum under the same working conditions, but the exergy efficiency is maximum at some other working conditions. The maximum values of the first law, the second law and the exergy efficiencies are found to be 21.72%, 27.30% and 62.53% respectively.

Performance Evaluation of an Integrated Solar Combined Cycle

2012 ◽  
Author(s):  
Collins O. Ojo ◽  
Damien Pont ◽  
Enrico Conte ◽  
Richard Carroni
Keyword(s):  
Solar Energy ◽  
Capital Investment ◽  
Power Plants ◽  
Solar Power ◽  
Combined Cycle ◽  
Electricity Production ◽  
Water Steam ◽  
Plant Operator ◽  
Central Receiver ◽  
Solar Field

The integration of steam from a central-receiver solar field into a combined cycle power plant (CCPP) provides an option to convert solar energy into electricity at the highest possible efficiency, because of the high pressure and temperature conditions of the solar steam, and at the lowest capital investment, because the water-steam cycle of the CCPP is in shared use with the solar field. From the operational point of view, the plant operator has the option to compensate the variability of the solar energy with fossil fuel electricity production, to use the solar energy to save fuel and to boost the plant power output, while reducing the environmental footprint of the plant operation. Alstom is able to integrate very large amounts of solar energy in its new combined-cycle power plants, in the range of the largest solar field ever built (Ivanpah Solar Power Facility, California, 3 units, total 392 MWel). The performance potential of such integration is analyzed both at base load and at part load operation of the plant. Additionally, the potential for solar retrofit of existing combined-cycle power plants is assessed. In this case, other types of concentrating solar power technologies than central receiver (linear Fresnel and trough) may be best suited to the specific conditions. Alstom is able to integrate any of these technologies into existing combined-cycle power plants.

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