Exergetische Analyse und Bewertung verfahrenstechnischer Prozesse mit einem Flow‐Sheeting‐Programm

Abstract

Exergy analysis and assessment of process plants with flow-sheeting systems. Mass and enthalpy balances are necessary for the calculation and assessment of process plants. The economic and ecological results cannot be optimal because the different value of energy according to the Second Law of Thermodynamics and the influence of the environment are not included. This is accomplished by exergetic analysis and assessment. The aim is to obtain an exergy analysis and assessment of any procesSplant through combination with a flowsheeting system. Because the exergy is dependent on the choice of a reference state, an environmental model is proposed which is suitable in regard to the above-mentioned aim.

Exergetical Evaluation of Biobased Synthesis Pathways

“…The molar exergy content of a material flow is composed of three terms [16], namely the chemical exergy E chem , the physical exergy E phys , and the mixing exergy E mix : chem phys mix…”

Application of Advanced Exergetic Analysis for the Improvement of Chemical Processes

“…The problems associated with the last objection can be effectively addressed. Specific proposals and methodologies for defining a reference environment are available , , . For technical analyses, reference environment definitions based on abundant reference substances are used , .…”

“…Another major advantage of exergy analysis is its easy integration into simulation programs , . However, different studies have shown that exergy analysis provides rather small benefits in combination with computer‐based mathematical optimization procedures , .…”

Biomass as Feedstock in the Chemical Industry – An Examination from an Exergetic Point of View

“…Hence, there is very little information available about possible chemical processes as a basis for quantitative evaluation. The exergy of a material flow can be divided into three parts: chemical exergy, physical exergy, and exergy upon mixing [20][21][22]: However, material and energy balances are not sufficient for an initial evaluation because, e.g., the quality of various energy forms is not considered.…”

“…In this paper, T 0 = 298.15 K and p 0 = 101 325 Pa as temperature and pressure of the environment are assumed. The exergy of a material flow can be divided into three parts: chemical exergy, physical exergy, and exergy upon mixing [20][21][22]:…”