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Published in: Energy Efficiency 4/2017

12-12-2016 | Original Article

Analysis of exergy demand for air heating of an air handling unit

Authors: Violeta Misevičiūtė, Kęstutis Valančius, Violeta Motuzienė, Genrika Rynkun

Published in: Energy Efficiency | Issue 4/2017

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Abstract

In modern buildings, an increasing amount of the consumed energy falls on ventilation systems. The amount of energy needed for ventilation depends on weather fluctuations, wind, interaction between natural gravity and air tightness of the building, heat exchangers used in ventilation systems, efficiency of other ventilation equipment, and operating mode of ventilation systems in the building. Ventilation systems are comprised of a variety of elements that facilitate processes using energy of different types. The main elements that use energy in ventilation systems are fans, heat exchangers, and heaters. They have a significant effect on both energy needs of a public building and the exergy efficiency of a system. In order to achieve a more efficient use of exergy in heat exchangers, it is recommended to execute processes under as little temperature difference as possible; however, this increases the area of heat exchangers. Results of the analysis show that it is recommended to design ventilation systems based on the temperature that corresponds with the maximum demand of exergy in order to use the heat recovery unit as much as possible in the system.

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Metadata
Title
Analysis of exergy demand for air heating of an air handling unit
Authors
Violeta Misevičiūtė
Kęstutis Valančius
Violeta Motuzienė
Genrika Rynkun
Publication date
12-12-2016
Publisher
Springer Netherlands
Published in
Energy Efficiency / Issue 4/2017
Print ISSN: 1570-646X
Electronic ISSN: 1570-6478
DOI
https://doi.org/10.1007/s12053-016-9499-7

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