Original scientific paper

https://doi.org/10.17559/TV-20150702122617

The techno-economic justification for the changing of a system for separate heating/cooling and electrical energy production with a CCHP system with a micro-turbine and absorption refrigeration unit

Ivica Glavan orcid.org/0000-0002-7067-4460 ; Maritime department, University of Zadar, dr. Mihovila Pavlinovića 1, HR-23000 Zadar, Croatia
Zmagoslav Prelec ; Department of Thermodynamic and Energy Engineering, Faculty of Engineering, University of Rijeka, Vukovarska 58, HR-51000 Rijeka, Croatia
Branimir Pavković orcid.org/0000-0002-6738-4083 ; Department of Thermodynamic and Energy Engineering, Faculty of Engineering, University of Rijeka, Vukovarska 58, HR-51000 Rijeka, Croatia

Abstract

The system of separate production of heat energy from a boiler and cooling energy from a compression refrigeration unit powered with electrical energy from an external network can be replaced with a CCHP system based on the operation of a gas turbine and absorption refrigeration unit. For this purpose, models of the system were derived through the use of the object-oriented programming language Modelica, on the basis of which steady-state simulations were carried out, as well as technical-economic and the sensitivity analysis of the system, in relation to the changes of influential parameters such as coefficient of performance, the boiler efficiency, the ratio of the electric load, costs of electrical energy, fuel prices and investment costs. Developed system model is intended to be used in further research for dynamic simulations with implemented dynamic boundary conditions.

Keywords

absorption refrigeration unit; CCHP; compression refrigeration unit; micro-turbine; Modelica; sensitivity analysis; SimulationX

Hrčak ID:

153161

URI

https://hrcak.srce.hr/153161

Publication date:

19.2.2016.

Article data in other languages: croatian

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