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Analysis of seasonal exergy efficiency of an air handling unit
Ventilation systems play an important role for providing suitable indoor climate in buildings. Improving these systems allows promoting energy efficiency in building sector, which is responsible for a large percentage of global energy consumption. Therefore, this work focuses on assessment of ventilation air handling unit (AHU) using thermodynamics. The exergy analysis is used to evaluate the performance of an AHU. Special attention is made about seasonally varying exergy flows of a system. As efficiency of a ventilation system is closely linked to local climate, especially to the varying reference temperature. The paper presents an approach for calculating the seasonal exergy efficiency and gives the results of the AHU analysis. The case study reveals that the highest exergy consumption is when the outdoor temperature is –2.5 ºC. The AHU case with heat recovery and water heater is the most efficient comparing to other cases investigated. The use of this methodology may be extended for determining of the seasonal exergy efficiency of any other HVAC equipment.
Analysis of seasonal exergy efficiency of an air handling unit
Ventilation systems play an important role for providing suitable indoor climate in buildings. Improving these systems allows promoting energy efficiency in building sector, which is responsible for a large percentage of global energy consumption. Therefore, this work focuses on assessment of ventilation air handling unit (AHU) using thermodynamics. The exergy analysis is used to evaluate the performance of an AHU. Special attention is made about seasonally varying exergy flows of a system. As efficiency of a ventilation system is closely linked to local climate, especially to the varying reference temperature. The paper presents an approach for calculating the seasonal exergy efficiency and gives the results of the AHU analysis. The case study reveals that the highest exergy consumption is when the outdoor temperature is –2.5 ºC. The AHU case with heat recovery and water heater is the most efficient comparing to other cases investigated. The use of this methodology may be extended for determining of the seasonal exergy efficiency of any other HVAC equipment.
Analysis of seasonal exergy efficiency of an air handling unit
Streckienė, Giedrė (author) / Martinaitis, Vytautas (author) / Bielskus, Juozas (author)
2017-01-01
AIP conference proceedings, Vol. 1884. The 2nd international conference on energy engineering and smart materials: ICEESM 2017, 7–9 July 2017, Lyon, France, Melville, NY : American Institute of Physics, 2017, art. no. 020005, p. 1-4 ; ISSN 0094-243X ; ISBN 9780735415645
Article (Journal)
Electronic Resource
English
DDC:
690
Primary exergy efficiency—Effect of system efficiency environment to benefits of exergy savings
| Online Contents | 2016