The energy system is one of the major sub-sectors of the economy in every society in which both supply with high reliability and compatibility of the energy sector with the environment is a necessity in the process of economic reconstruction and sustainable development. The energy system has...

The aim of this paper is to analyze the mutual interdependencies and trade-offs between heat storage and district heating network considering economic and ecological aspects. Therefore, a MILP (mixed integer linear programming) problem of a distributed energy system is formulated with a weighted...

Conventional exergy-based methods pinpoint components and processes with high irreversibilities. However, they lack certain insight. For a given advanced technological state, there is a minimum level of exergy destruction related to technological and/or economic constraints that is unavoidable....

Combined heat and power (CHP) plants are characterized by high fuel efficiency and are therefore usually the thermal power producing units of choice within a district heating network. The operation of CHP units is typically controlled by the current heat demand and thus delimits the range of...

Based on the concepts of avoidable/unavoidable exergy destructions and investment costs, this article presents an exergy analysis and an exergoeconomic evaluation to identify the potential energy savings in distillation processes. Methods for calculating the avoidable/unavoidable exergy...

A systematic and general methodology for defining and calculating exergetic efficiencies and exergy related costs in thermal systems is proposed. The methodology is based on the Specific Exergy Costing (SPECO) approach, in which (a) the fuel and product of a component are defined by taking a...

An advanced exergoenvironmental analysis combines an advanced exergetic analysis with a life cycle assessment. This allows the environmental impacts of an energy conversion system to be split into avoidable/unavoidable and endogenous/exogenous parts, revealing improvement potential and component...

This paper presents the definitions of some terms used in exergy analysis and exergy costing, discusses options for the symbols to be used for exergy and some exergoeconomic variables, and presents the nomenclature for the remaining terms.