A New Exergy Disaggregation Approach for Complexity Reduction and Dissipative Equipment Isolation in Thermoeconomics

Santos, Rodrigo Guedes dos; Lourenço, Atilio; Faria, Pedro Rosseto de; Barone,; Santos, José Joaquim Conceição Soares

doi:10.3390/e24111672

Cited by 6 publications

(5 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The A&F Model [9] is a recent thermoeconomic approach, it was developed with the premise of reducing the complexity and computational efforts compared to other methodologies that are capable of isolating (defining input and output) dissipative equipment, such as a valve. This model also uses the physical exergy disaggregation and the definition of its terms are Helmholtz energy E A and flow work E F .…”

Section: Aandf Modelmentioning

confidence: 99%

“…Nevertheless, there is a consequent increase in the complexity of thermoeconomic modeling [5]. In this paper, five thermoeconomic models are studied: E, E T & E M [6], H&S [7], UFS [8] and the recent A&F Model [9]. The plant chosen for the analysis allows the approach of a very latent theme in thermoeconomics which is the waste cost allocation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Comparative Study of the Recent A&F Model with Conventional Thermoeconomic Methodologies in the Waste Treatment in a Regenerative Gas Turbine Cogeneration System

Santos

Lourenço

Faria

et al. 2023

Proceedings of the XV Ibero-American Congress of Mechanical Engineering

Self Cite

View full text Add to dashboard Cite

Thermoeconomics is a science that reconciles thermodynamic and economic concepts. It can be divided into three fields of action: cost allocation, diagnosis and optimization. Most thermoeconomicists agree that exergy is the most appropriate thermodynamic magnitude to associate with cost. In some applications, exergy disaggregation is required. Literature shows several thermoeconomic methodologies. Despite the wide use and their respective fields of action, all models have limitations in the dissipative equipment isolation and waste treatment or an increase in complexity in thermoeconomic modeling. In order to fill part of this scientific gap in thermoeconomics, a recent methodology, the A&F Model, is proposed. This new approach disaggregates physical exergy into just two terms, namely Helmholtz energy and flow work. This work presents for the first time the use of this new approach, through a cost allocation, in a cogeneration system with regenerative gas turbine, and compares it with conventional thermoeconomic methodologies.

show abstract

Section: Aandf Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Comparative Study of the Recent A&F Model with Conventional Thermoeconomic Methodologies in the Waste Treatment in a Regenerative Gas Turbine Cogeneration System

Santos

Lourenço

Faria

et al. 2023

Proceedings of the XV Ibero-American Congress of Mechanical Engineering

Self Cite

View full text Add to dashboard Cite

show abstract

“…The diagram depicted in Figure 8 showcases the use of the A&F Model [22] in the heat pump system for the isolation of valves and the determination of their products and fuels via the utilization of Helmholtz energy (E A ) and flow work (E F ) terms.…”

Section: Aandf Modelmentioning

confidence: 99%

“…However, it can incur a loss in the accuracy of the results. Finally, the latest thermoeconomic methodology presented in the literature is the A&F model [22], a methodology proposed to isolate dissipative components with less modelling complexity.…”

Section: Introductionmentioning

confidence: 99%

Thermoeconomic Cost Allocation Approaches in a Simultaneous Heating and Cooling Heat Pump System.

Santos

Lozano

Serra

et al. 2023

36th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 20

View full text Add to dashboard Cite

Thermoeconomics is a branch of engineering that combines concepts from thermodynamics and economics to tackle problems that are hard or cannot be solved by these sciences, separately. The main applications of thermoeconomics are cost allocation, optimization, and malfunction diagnosis of energy systems. Defining the productive structure plays a critical role in thermoeconomic modeling, and exergy is a highly appropriate thermodynamic quantity to correlate with costs. For systems containing dissipative equipment, the use of total exergy in conventional productive diagrams need a subsequent decision, by the analysts, on how to define its fuel and product. In some applications, exergy disaggregation can be elegant options, mostly to deal with dissipative components. Nevertheless, all of them increase the complexity in thermoeconomic modelling. In this work, thermoeconomic cost allocation approaches in a simultaneous heating and cooling heat pump system were performed from the application of some thermoeconomics methodologies. The studied system has one dissipative component (valve) and generates no waste. There are three specific objectives. Firstly, to present the different possibilities to treat and isolate the valve in the thermoeconomics modelling. Secondly, to compare the methodologies presented from the thermoeconomic point of view through the cost allocation in a simultaneous heating and cooling heat pump system. And finally, to show the pros and cons of each methodology applied in this study to support future decision-makings in thermoeconomic modelling. The research demonstrates that the differences between the methodologies used were not significant, and the choice of methodology should depend on factors such as the need for disaggregated equipment. In conclusion, the findings of this study indicate that without certain models that may overestimate the cost of particular components, the thermoeconomic results fall within a narrow range of 4% of the solution line. This suggests that the methodologies used did not yield significantly different results.

show abstract

“…Conversely, when considering the cost of acquiring environmental control/treatment equipment, this model would need to depict such equipment in the physical and productive diagrams to facilitate appropriate cost allocation. However, these devices are dissipative, and several studies [32][33][34] have already demonstrated that Model E is not adequate for isolating them within the productive structure and thus analyzing them in a separate and appropriate manner.…”

mentioning

confidence: 99%

Thermoeconomic Modeling as a Tool for Internalizing Carbon Credits into Multiproduct System Analysis

Santos,

Faria,

Chaves Belisario

et al. 2024

Processes

Self Cite

View full text Add to dashboard Cite

In the context of emissions, carbon dioxide constitutes a predominant portion of greenhouse gases (GHGs), leading to the use of the term “carbon” interchangeably with these gases in climate-related discussions. The carbon market has emerged as a pivotal mechanism for emission regulation, allowing industries that struggle to meet emission reduction targets to acquire credits from those who have successfully curbed their emissions below stipulated levels. Thermoeconomics serves as a tool for analyzing multiproduct systems prevalent in diverse sectors, including sugarcane and alcohol mills, paper and pulp industries, steel mills, and cogeneration plants. These systems necessitate frameworks for equitable cost/emission allocation. This study is motivated by the need to expand the scope of thermoeconomic modeling to encompass expenses or revenues linked with the carbon market. By utilizing a cogeneration system as a representative case, this research aims to demonstrate how such modeling can facilitate the allocation of carbon market costs to final products. Moreover, it underscores the adaptability of this approach for internalizing other pertinent costs, encompassing expenses associated with environmental control devices, licenses, and permits. Although certain exergy disaggregation models depict an environmental component within diagrams, which is integral for addressing environmental burdens, even models without explicit environmental devices can effectively internalize carbon credits and allocate them to final products. The integration of carbon credits within thermoeconomic modeling introduces the capability to assess both the financial and environmental implications of emissions. This integration further incentivizes the reduction in GHGs and supports optimization endeavors concerning system design and operation. In summary, this study delves into the incorporation of carbon market dynamics into thermoeconomic modeling. It demonstrates the potential to allocate carbon-related costs, facilitates comprehensive cost analysis, encourages emission reduction, and provides a platform for enhancing system efficiency across industrial sectors.

show abstract

A New Exergy Disaggregation Approach for Complexity Reduction and Dissipative Equipment Isolation in Thermoeconomics

Cited by 6 publications

References 29 publications

A Comparative Study of the Recent A&F Model with Conventional Thermoeconomic Methodologies in the Waste Treatment in a Regenerative Gas Turbine Cogeneration System

A Comparative Study of the Recent A&F Model with Conventional Thermoeconomic Methodologies in the Waste Treatment in a Regenerative Gas Turbine Cogeneration System

Thermoeconomic Cost Allocation Approaches in a Simultaneous Heating and Cooling Heat Pump System.

Thermoeconomic Modeling as a Tool for Internalizing Carbon Credits into Multiproduct System Analysis

Contact Info

Product

Resources

About