Energy, exergy and economic analysis for ON/OFF cycle and VFD HVAC cooling systems

Waleed M.A. Hamanah; Mahmoud Kassas; Ahmet Z. Sahin; Ibrahim M. El-Amin

doi:10.1504/IJEX.2019.099293

Energy, exergy and economic analysis for ON/OFF cycle and VFD HVAC cooling systems

Waleed M.A. Hamanah
, Mahmoud Kassas^*
, Ahmet Z. Sahin
, Ibrahim M. El-Amin

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

A comparison of energy, exergy rate and economic analyses for an air conditioning ON/OFF cycle and variable frequency drive (VFD) HVAC systems with heat-mass exchange calculations were performed. The study considered several key performance parameters including; energy consumption, energy saving, exergy destruction rate, exergy efficiency, CO₂ emission, the coefficient of performance (COP), and cost analysis for both HVAC systems. The total energy consumption, exergy destruction, and CO2 emission are lower when a VFD HVAC is used, as compared with an ON/OFF cycle HVAC system. The total exergy destruction decreases by more than 20%, on average, when a VFD is used when compared with the case of the ON/OFF cycle. Thus, this study reveals that, when a VFD is used, the energy efficiency and exergy efficiency increase by more than 37% and 10%, respectively.

Original language	English
Pages (from-to)	355-379
Number of pages	25
Journal	International Journal of Exergy
Volume	28
Issue number	4
DOIs	https://doi.org/10.1504/IJEX.2019.099293
State	Published - 2019

Bibliographical note

Publisher Copyright:
Copyright © 2019 Inderscience Enterprises Ltd.

Keywords

And air conditioning
Energy savings
Exergy destruction
FD ON/OFF cycle
HVAC
Heating
Variable frequency drives
Ventilation

ASJC Scopus subject areas

General Energy

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1504/IJEX.2019.099293

Cite this

@article{679a1a2bc7a441bd888b7318eee5755e,

title = "Energy, exergy and economic analysis for ON/OFF cycle and VFD HVAC cooling systems",

abstract = "A comparison of energy, exergy rate and economic analyses for an air conditioning ON/OFF cycle and variable frequency drive (VFD) HVAC systems with heat-mass exchange calculations were performed. The study considered several key performance parameters including; energy consumption, energy saving, exergy destruction rate, exergy efficiency, CO2 emission, the coefficient of performance (COP), and cost analysis for both HVAC systems. The total energy consumption, exergy destruction, and CO2 emission are lower when a VFD HVAC is used, as compared with an ON/OFF cycle HVAC system. The total exergy destruction decreases by more than 20\%, on average, when a VFD is used when compared with the case of the ON/OFF cycle. Thus, this study reveals that, when a VFD is used, the energy efficiency and exergy efficiency increase by more than 37\% and 10\%, respectively.",

keywords = "And air conditioning, Energy savings, Exergy destruction, FD ON/OFF cycle, HVAC, Heating, Variable frequency drives, Ventilation",

author = "Hamanah, \{Waleed M.A.\} and Mahmoud Kassas and Sahin, \{Ahmet Z.\} and El-Amin, \{Ibrahim M.\}",

note = "Publisher Copyright: Copyright {\textcopyright} 2019 Inderscience Enterprises Ltd.",

year = "2019",

doi = "10.1504/IJEX.2019.099293",

language = "English",

volume = "28",

pages = "355--379",

journal = "International Journal of Exergy",

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T1 - Energy, exergy and economic analysis for ON/OFF cycle and VFD HVAC cooling systems

AU - Hamanah, Waleed M.A.

AU - Kassas, Mahmoud

AU - Sahin, Ahmet Z.

AU - El-Amin, Ibrahim M.

PY - 2019

Y1 - 2019

N2 - A comparison of energy, exergy rate and economic analyses for an air conditioning ON/OFF cycle and variable frequency drive (VFD) HVAC systems with heat-mass exchange calculations were performed. The study considered several key performance parameters including; energy consumption, energy saving, exergy destruction rate, exergy efficiency, CO2 emission, the coefficient of performance (COP), and cost analysis for both HVAC systems. The total energy consumption, exergy destruction, and CO2 emission are lower when a VFD HVAC is used, as compared with an ON/OFF cycle HVAC system. The total exergy destruction decreases by more than 20%, on average, when a VFD is used when compared with the case of the ON/OFF cycle. Thus, this study reveals that, when a VFD is used, the energy efficiency and exergy efficiency increase by more than 37% and 10%, respectively.

AB - A comparison of energy, exergy rate and economic analyses for an air conditioning ON/OFF cycle and variable frequency drive (VFD) HVAC systems with heat-mass exchange calculations were performed. The study considered several key performance parameters including; energy consumption, energy saving, exergy destruction rate, exergy efficiency, CO2 emission, the coefficient of performance (COP), and cost analysis for both HVAC systems. The total energy consumption, exergy destruction, and CO2 emission are lower when a VFD HVAC is used, as compared with an ON/OFF cycle HVAC system. The total exergy destruction decreases by more than 20%, on average, when a VFD is used when compared with the case of the ON/OFF cycle. Thus, this study reveals that, when a VFD is used, the energy efficiency and exergy efficiency increase by more than 37% and 10%, respectively.

KW - And air conditioning

KW - Energy savings

KW - Exergy destruction

KW - FD ON/OFF cycle

KW - HVAC

KW - Heating

KW - Variable frequency drives

KW - Ventilation

UR - https://www.scopus.com/pages/publications/85064988699

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DO - 10.1504/IJEX.2019.099293

M3 - Article

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SN - 1742-8297

VL - 28

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EP - 379

JO - International Journal of Exergy

JF - International Journal of Exergy

IS - 4

ER -

Energy, exergy and economic analysis for ON/OFF cycle and VFD HVAC cooling systems

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

Access to Document

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Cite this