This paper presents an abbreviated method for estimating exergy destruction in a heat exchanger, requiring only black-box data of the exchanger’s inputs and outputs, and eliminating part of the mathematical difficulties associated with the calculations. A well-known model for temperature distributions in an exchanger is adapted for this case, and is used to distinguish between the contributions...

Energetic and exergetic analyses as well as optimization studies of a transcritical carbon dioxide heat pump system are presented in this article. A computer code has been developed to obtain sub-critical and super-critical thermodynamic and transport properties of carbon dioxide. Estimates for irreversibilities of individual components of the system lead to possible measures for performance im...

The Exergetic Port-Hamiltonian Systems modeling language combines a graphical syntax inspired by bond graphs with port-Hamiltonian semantics akin to the GENERIC formalism. enables modular and hierarchical specification of composition pattern lumped distributed-parameter models. reflects first second law thermodynamics as structural properties. Interconnected hierarchically defined models multip...

A soft~are packcage for both the thermodynamic properties computa-~ic~and tne analysis of usual vapor compression plant schemes is anusefu: tool for air conditioning and refrigeration researchers and mani-facture>s. At ~hePresent time, it could sUPPlY an important contribu-tion to search for CFCs substitutes; in fact, comparisons between two ormore ~o•king fluids...

Abstract With the constant increase of energy costs and environmental impacts, improving process efficiency is considered a priority issue for manufacturing field. A wide knowledge about materials, energy, machinery, auxiliary equipment required in order to optimize overall performance processes. Sustainability needs be assessed find an optimal compromise between technical quality products comp...