Biomass boiler energy conversion system analysis with the aid of exergy-based methods

Chang-chun, LI; Gillum, Craig; Toupin, Kevin; Donaldson, Burl

doi:10.1016/j.enconman.2015.07.014

Cited by 60 publications

(24 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Different improvement measures have been suggested by the past studies in order to reduce exergy destruction. Though excess air is needed for complete combustion, the amount should be minimized because an increase in excess air will reduce the adiabatic flame temperature and decrease the exergy efficiency of the boiler [67] as well as the overall exergy efficiency of the plant [53]. Installation of feedwater heaters will decrease the temperature difference of the flue gas and feedwater, and will reduce irreversibilities encountered in the boiler heat exchanger.…”

Section: Discussionmentioning

confidence: 99%

“…The decrease in pressure of the condenser as well as increase in steam pressure and temperature will reduce exergy destruction and increase the overall system performance. However, increase in the temperature is limited by the boiler tube's oxidation temperature and allowable stress [67]. Moreover, the benefit of higher revenue as a result of increase in performance of the plant due to the increase in temperature and installation of feedwater heaters should be balanced against the increase in the capital cost to ensure that the pay-back period on the investment is favourable [23].…”

Section: Discussionmentioning

confidence: 99%

“…The reduction in the use of coal fuels, and the need to find alternatives to fossil fuels in order to decrease CO 2 emissions, have attracted more interest in using biomass fuels as the energy carrier since biomass is perceived as being a carbon-neutral source [67,68]: biomass is thus regarded a suitable source of energy [69]. However, the overall efficiencies of biomass-fired power plants are relatively low [19,70].…”

Section: Heat and Power Plants Fired By Biomass-based Fuelsmentioning

confidence: 99%

“…Li et al [67] used conventional exergy analysis to find the sources of irreversibilities and to identify exergy destruction in the various different components of the biomass boiler. They also used advanced exergy analysis to provide comprehensive information about the avoidable exergy destruction for each component, as well as for the whole system.…”

Section: Heat and Power Plants Fired By Biomass-based Fuelsmentioning

confidence: 99%

See 3 more Smart Citations

Exergy Analysis of Solid Fuel-Fired Heat and Power Plants: A Review

2017

View full text Add to dashboard Cite

Abstract:The growing demand for energy is particularly important to engineers with respect to how the energy produced by heat and power plants can be used efficiently. Formerly, performance evaluation of thermal power plants was done through energy analysis. However, the energy method does not account for irreversibilities within the system. An effective method to measure and improve efficiency of thermal power plant is exergy analysis. Exergy analysis is used to evaluate the performance of a system and its main advantage is enhancement of the energy conversion process. It helps identify the main points of exergy destruction, the quantity and causes of this destruction, as well as show which areas in the system and components have potential for improvements. The current study is a comprehensive review of exergy analyses applied in the solid fuels heat and power sector, which includes coal, biomass and a combination of these feedstocks as fuels. The methods for the evaluation of the exergy efficiency and the exergy destruction are surveyed in each part of the plant. The current review is expected to advance understanding of exergy analysis and its usefulness in the energy and power sectors: it will assist in the performance assessment, analysis, optimization and cost effectiveness of the design of heat and power plant systems in these sectors.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Heat and Power Plants Fired By Biomass-based Fuelsmentioning

confidence: 99%

Section: Heat and Power Plants Fired By Biomass-based Fuelsmentioning

confidence: 99%

See 2 more Smart Citations

Exergy Analysis of Solid Fuel-Fired Heat and Power Plants: A Review

2017

View full text Add to dashboard Cite

show abstract

“…It also worth noting that 0.5 % to 3 % of ash is formed by burning the timber [17], while for some coals, this figure may reach 50 % [18]. Accordingly, it can be said that the creation of energy efficiency and perspective from ecology point of view boiler units working on wood waste, is one of the most perspective trends in modern energy technology [19].…”

Section: Introductionmentioning

confidence: 99%