Process development and multi-criteria optimization of a biomass gasification unit combined with a novel CCHP model using helium gas turbine, kalina cycles, and dual-loop organic flash cycle

Du, Jingguo; Zou, Yunhe; Dahlak, Aida

doi:10.1016/j.energy.2024.130319

Cited by 4 publications

(8 citation statements)

References 42 publications

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“…Key reactions occurring during gasification include methane formation and water-gas shift reactions, with the equilibrium constants for these reactions provided as follows [ 15 , 23 , 24 ]:

…”

Section: Mathematical Modelingmentioning

confidence: 99%

“…The equilibrium constants for these reactions are denoted as follows [ 15 , 23 , 24 ]:

where P Ga is the pressure during gasification. K 1 and K 2 are derived from the Gibbs free energy changes associated with each reaction, calculated by [ 15 , 23 , 24 ]:

where

is the universal gas constant,

is the temperature within the gasifier.

and

are computed using the following equations [ 15 , 23 , 24 ]:

…”

Section: Mathematical Modelingmentioning

confidence: 99%

“…K 1 and K 2 are derived from the Gibbs free energy changes associated with each reaction, calculated by [ 15 , 23 , 24 ]:

where

is the universal gas constant,

is the temperature within the gasifier.

and

are computed using the following equations [ 15 , 23 , 24 ]:

…”

Section: Mathematical Modelingmentioning

confidence: 99%

“…Under the assumption of no heat loss in the gasifier, the energy balance equation governing the gasification process is outlined as follows [ 15 , 23 , 24 ]:

where

corresponds to the formation enthalpy of the j th component,

represents the variance in specific enthalpy of the j th component at the gasification temperature relative to the reference temperature T 0 .…”

Section: Mathematical Modelingmentioning

confidence: 99%

“…They reported that the optimal exergy efficiency and unit exergy cost could reach 17.64% and 26 USD/GJ respectively. Du et al [ 24 ] analyzed a biomass-driven multigeneration system comprising a gasification unit, a helium GT cycle, a Kalina cycle, a DWH, a refrigeration unit, and a dual-loop OFC. The results indicated that the system could reach an optimal exergy efficiency of 35.57%, a net present value (NPV) of 15.07 M USD, and a payback period of 3.97 years.…”

Section: Introductionmentioning

confidence: 99%

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Exergoeconomic Analysis and Optimization of a Biomass Integrated Gasification Combined Cycle Based on Externally Fired Gas Turbine, Steam Rankine Cycle, Organic Rankine Cycle, and Absorption Refrigeration Cycle

Ren,

Xu,

Qian

et al. 2024

Entropy

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Adopting biomass energy as an alternative to fossil fuels for electricity production presents a viable strategy to address the prevailing energy deficits and environmental concerns, although it faces challenges related to suboptimal energy efficiency levels. This study introduces a novel combined cooling and power (CCP) system, incorporating an externally fired gas turbine (EFGT), steam Rankine cycle (SRC), absorption refrigeration cycle (ARC), and organic Rankine cycle (ORC), aimed at boosting the efficiency of biomass integrated gasification combined cycle systems. Through the development of mathematical models, this research evaluates the system’s performance from both thermodynamic and exergoeconomic perspectives. Results show that the system could achieve the thermal efficiency, exergy efficiency, and levelized cost of exergy (LCOE) of 70.67%, 39.13%, and 11.67 USD/GJ, respectively. The analysis identifies the combustion chamber of the EFGT as the component with the highest rate of exergy destruction. Further analysis on parameters indicates that improvements in thermodynamic performance are achievable with increased air compressor pressure ratio and gas turbine inlet temperature, or reduced pinch point temperature difference, while the LCOE can be minimized through adjustments in these parameters. Optimized operation conditions demonstrate a potential 5.7% reduction in LCOE at the expense of a 2.5% decrease in exergy efficiency when compared to the baseline scenario.

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“…Key reactions occurring during gasification include methane formation and water-gas shift reactions, with the equilibrium constants for these reactions provided as follows [ 15 , 23 , 24 ]:

…”

Section: Mathematical Modelingmentioning

confidence: 99%

“…The equilibrium constants for these reactions are denoted as follows [ 15 , 23 , 24 ]:

where P Ga is the pressure during gasification. K 1 and K 2 are derived from the Gibbs free energy changes associated with each reaction, calculated by [ 15 , 23 , 24 ]:

where

is the universal gas constant,

is the temperature within the gasifier.

and

are computed using the following equations [ 15 , 23 , 24 ]:

…”

Section: Mathematical Modelingmentioning

confidence: 99%

“…K 1 and K 2 are derived from the Gibbs free energy changes associated with each reaction, calculated by [ 15 , 23 , 24 ]:

where

is the universal gas constant,

is the temperature within the gasifier.

and

are computed using the following equations [ 15 , 23 , 24 ]:

…”

Section: Mathematical Modelingmentioning

confidence: 99%

“…Under the assumption of no heat loss in the gasifier, the energy balance equation governing the gasification process is outlined as follows [ 15 , 23 , 24 ]:

where

corresponds to the formation enthalpy of the j th component,

represents the variance in specific enthalpy of the j th component at the gasification temperature relative to the reference temperature T 0 .…”

Section: Mathematical Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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