scholarly journals ENERGY AND EXERGY ANALYSIS OF SHAKARGANJ LIMITED JHANG THERMAL POWER PLANT

2020 ◽  
Vol 35 (2) ◽  
pp. 7
Author(s):  
Tanveer ul Ul Islam
Keyword(s):  
Power Plant ◽  
Exergy Analysis ◽  
Thermal Power ◽  
Combustion Process ◽  
Exergy Loss ◽  
Second Law ◽  
Outlet Temperature ◽  
Energy And Exergy ◽  
Energy And Exergy Analysis ◽  
Actual Flow

Exergy analysis has sparked interest within the scientific community to require a more in-depth check up on the energy conversation devices. Exergy analysis gives entropy generation, irreversibility percentage exergy loss and second law efficiency. The exergy loss or irreversibility is the maximum at boiler. Thus to know about actual flow of exergy in the cycle thermodynamic analysis based on second law is desirable. In this report exergy analysis of operating condition of boiler has been carried out based on mass and exergy balance. The power plant boiler was simulated based on the measured operating data and the thermodynamic states of the plant components. . It has been found that maximum exergy destruction occurs due to combustion process. Exergy efficiency of boiler according to second law analysis and the exergy analysis of back pressure steam turbine is performed. It is found that at minimum flue gas outlet temperature second law efficiency is the maximum.

Energy and Exergy Analysis of Operating Thermal Power Plant at 50MWe Grid Load

2009 ◽  
Vol 4 (2) ◽  
pp. 34-40
Author(s):  
T. Ganapathy ◽  
◽  
R.P. Gakkhar ◽  
Krishnan Murugesan ◽  
N. Alagumurthi ◽  
...  
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Exergy Analysis ◽  
Thermal Power ◽  
Energy And Exergy ◽  
Energy And Exergy Analysis ◽  
Grid Load

Energy and Exergy Analysis of a Biomass Power Plant

2016 ◽  
Author(s):  
João Silva ◽  
Senhorinha F. Teixeira ◽  
Simone Preziati ◽  
José Carlos Teixeira
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Exergy Analysis ◽  
Thermal Power ◽  
Normal Operation ◽  
Strong Incentive ◽  
Energy And Exergy ◽  
Energy And Exergy Analysis ◽  
Dry Climates ◽  
Biomass Power Plant

The fulfilment of energy targets regarding the use of renewable energy has been a strong incentive to the development of dedicated power plants using biomass. Because these facilities operate with low value residues, this orientation has also received a strong incentive by the quest to reduce the amount of fuel in the woods and lowering the risk of fire. This issue is a major problem in dry climates. Although the number of plants planned for Portugal was very large, the actual number of units in operation is small. The first plant to enter production in Portugal was the thermal power plant of Mortágua. In this paper the energy and exergy analysis in this plant is presented. The objective of this work is to develop an analysis for the energy conversion in the plant. This is based on parameters that were retrieved during its normal operation and include: biomass and air flow rate, temperature measurements of the flue gases throughout the facility including the economizer, the two superheaters and flue gas composition. The elemental analysis of the biomass resulting from a blend of various sources was measured in addition to its moisture (ranging between 20 and 45% depending on the sources). The analysis was carried out for a fuel batch with a moisture of 35%. The plant was operated at three loads (full load, 80% and 65% load) and from the energy/mass balances the overall efficiency was calculated to be approximately 26%. The data were also used to perform a second law analysis of the plant which enables the calculation of the exergy destruction in the various components of the facility, including the external irreversibility. It was observed that the combustion chamber is the prime contributor to the overall loss of efficiency. The exergy efficiency was found approximately 22%.

Experimental Evaluation of the Thermal Behavior of a Vertical Solar Tank Using Energy and Exergy Analysis

2005 ◽  
Author(s):  
Ali A. Dehghan ◽  
Mohammad H. Hosni ◽  
S. Hoda Shiryazdi
Keyword(s):  
Temperature Distribution ◽  
Flow Rate ◽  
Storage Tank ◽  
Thermal Stratification ◽  
Exergy Analysis ◽  
Hot Water ◽  
Second Law ◽  
Energy And Exergy ◽  
Energy And Exergy Analysis ◽  
Hot Water Supply

The thermal performance of a Thermosyphon Domestic Solar Water Heater (DSWH) with a vertical storage tank is investigated experimentally. The system is installed on a roof - top of a four person family house and its thermal characteristics is evaluated by means of carefully measuring the temperature distribution of water inside the storage tank, solar collector flow rate and its inlet and outlet temperatures as well as load/consumption outlet and inlet temperatures and the corresponding water flow rate under a realistic operating conditions. The measurements are conducted every hour starting from morning until late night on a daily basis and continued for about 120 days during August until November 2004. It is seen that thermal stratification is well established inside the tank from 11 AM until 10 PM especially during August to September enabling the tank to provide the necessary amount of hot water at an acceptable temperature. However, thermal stratification is observed to start degrading from mid-night until morning when there is no hot water supply from the collector and due to the diffusion of heat from the top hot water layers to the bottom cold region and conduction through tank’s wall. The thermal behavior of the storage tank is also assessed based on both energy and exergy analysis and its first and second law efficiencies are calculated. It is observed that the storage tank under study has an average first law efficiency of 47.8% and is able to supply the required amount of hot water at a proper temperature. The average second law efficiency of the storage tank is observed to be 28.7% and, although is less than its first low efficiency, but is high enough to ensure that the quality of the hot water supply is well preserved. The proper level of second law efficiency is due to the preservation of the thermal stratification inside the storage tank, leading to supply of hot water at highest possible temperature and hence highest possible energy potential. Experiments are also done for no-load conditions when the storage tank only interacts with the collector, without hot water withdrawal from the tank. It is seen that for no-load condition, thermal stratification continuously develops from morning until around 16 PM after which no noticeable changes in the temperature distribution inside the tank is observed.

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