Exergy Analysis of a Bio-System: Soil–Plant Interaction

Abstract

This paper explains a thorough exergy analysis of the most important reactions in soil–plant interactions. Soil, which is a prime mover of gases, metals, structural crystals, and electrolytes, constantly resembles an electric field of charge and discharge. The second law of thermodynamics reflects the deterioration of resources through the destruction of exergy. In this study, we developed a new method to assess the exergy of soil and plant formation processes. Depending on the types of soil, one may assess the efficiency and degradation of resources by incorporating or using biomass storage. According to the results of this study, during different processes from the mineralization process to nutrient uptake by the plant, about 62.5% of the input exergy will be destroyed because of the soil solution reactions. Most of the exergy destruction occurs in the biota–atmosphere subsystem, especially in the photosynthesis reaction, due to its low efficiency (about 15%). Humus and protonation reactions, with 14% and 13% exergy destruction, respectively, are the most exergy destroying reactions. Respiratory, weathering, and reverse weathering reactions account for the lowest percentage of exergy destruction and less than one percent of total exergy destruction in the soil system. The total exergy yield of the soil system is estimated at about 37.45%.

Nature as a Teacher for Abiota Self-Organization in Terms of Entropy Analysis

“…This 'state of disorder" is characterized by the amount of disordered energy and its temperature level. In the case of reversible heat transfer between two systems, both systems would be at the same temperature and the amount of increase in one's disorder matches the amount of decrease in the other's disorder [19].…”

Model development and energy and exergy analysis of the biomass gasification process (Based on the various biomass sources)

“…Esto puede realizarse a partir de la sostenible mediante la aplicación del análisis exergético de ciclo de vida (ELCA) determinación composición química en las fases de crecimiento. En estudios como los presentados por Bararzadeh et al [169] en el 2008, y Rasoolizadeh et al [170] en el 2020, se observa cómo obtener la exergía asociada a las fases de crecimiento en el cultivo, e identificar las reacciones o principales insumos sobre los cuales puede presentarse las mayores destrucciones de exergía.…”

“…Identificación de etapas a optimizar en la gasificación de biomasa para producción de energía sostenible mediante la aplicación del análisis exergético de ciclo de vida (ELCA) Las bajas eficiencias exergéticas en procesos biológicos, tal como mencionan Bararzadeh et al [169] en el año 2020, están relacionados a procesos que van desde la mineralización hasta la absorción de nutrientes por la planta. En su investigación muestran cómo hasta un 62,5% de la exergía destruida es debido a reacciones de disolución en el suelo, humus, protonación y fotosíntesis, esta última siendo la más determinante con una baja eficiencia energética (cerca del 15%).…”

Exergy Analysis of Coal-Based 2 X 7 MW Steam Power Plant

“…Maximum exergy destruction was found to occur in the boiler [17], [18]. Therefore, efforts to improve power plant performance must be directed at improving boiler performance, because this will lead to the greatest increase in plant efficiency [19]- [21]. The purpose of this research is to analyze one unit of steam power plant with coal fuel in terms of exergy which includes destructive exergy so that it is known which equipment experiences the largest energy loss and knows the efficiency value of the equipment used.…”