Exergy Analysis of Conventional and Low Exergy Systems for Heating and Cooling of Near Zero Energy Buildings

DOVJAK, Mateja ;SHUKUYA, Masanori ;KRAINER, Aleš .
Exergy Analysis of Conventional and Low Exergy Systems for Heating and Cooling of Near Zero Energy Buildings. 
Strojniški vestnik - Journal of Mechanical Engineering, [S.l.], v. 58, n.7-8, p. 453-461, june 2018. 
ISSN 0039-2480.
Available at: <https://www.sv-jme.eu/article/exergy-analysis-of-conventional-and-low-exergy-systems-for-heating-and-cooling-of-near-zero-energy-buildings/>. Date accessed: 25 apr. 2024. 
doi:http://dx.doi.org/10.5545/sv-jme.2011.158.

Dovjak, M., Shukuya, M., & Krainer, A.
(2012).
Exergy Analysis of Conventional and Low Exergy Systems for Heating and Cooling of Near Zero Energy Buildings.
Strojniški vestnik - Journal of Mechanical Engineering, 58(7-8), 453-461.
doi:http://dx.doi.org/10.5545/sv-jme.2011.158

@article{sv-jmesv-jme.2011.158,
	author = {Mateja  Dovjak and Masanori  Shukuya and Aleš  Krainer},
	title = {Exergy Analysis of Conventional and Low Exergy Systems for Heating and Cooling of Near Zero Energy Buildings},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {58},
	number = {7-8},
	year = {2012},
	keywords = {human body exergy; building heating and cooling; low exergy system; conventional system; building energy use; individual thermal comfort},
	abstract = {The purpose of the study is to compare two heating and cooling (H/C) systems regarding individual thermal comfort conditions and rational building energy use. Real test room is firstly equipped with low exergy (LowEx) system (i.e. heating-cooling ceiling radiative panels) and secondly with a conventional system (i.e. electric heaters, cooling split system with indoor unit). Additional case presents a thermally noninsulated room equipped with a conventional system. Individual thermal comfort conditionsare analyzed through the simulation of human body exergy balance (hbExB), human body exergy consumption (hbExC) rates and predicted mean votes (PMV) index. Measurements of energy use and control of temperature conditions are performed on an integrated control system (ICsIE) based on fuzzy logic. The results confirm that both systems create comfort conditions if the room is thermally well insulated. In case of non-insulated room there appears cool radiant exergy that often leads to discomfort conditions. More acceptable comfortable conditions (PMV closer to 0) do not always result in a lower hbExC rate. Individual characteristics with experimental conditions have a significant influence on separate parts of hbExB. LowEx system connected with ICsIE enables to set air temperature and mean radiant temperature and creates optimal thermal comfort conditions for individual user. The measured energy use for heating was by 11 to 27% lower for LowEx system than for the conventional system. The energy use for cooling was by 41 to 62% lower for LowEx system. The presented approach of reciprocal consideration of individual thermal comfort conditions and building energy use is important for the future design of H/C systems and for their application in near zero energy buildings.},
	issn = {0039-2480},	pages = {453-461},	doi = {10.5545/sv-jme.2011.158},
	url = {https://www.sv-jme.eu/article/exergy-analysis-of-conventional-and-low-exergy-systems-for-heating-and-cooling-of-near-zero-energy-buildings/}
}

Dovjak, M.,Shukuya, M.,Krainer, A.
2012 June 58. Exergy Analysis of Conventional and Low Exergy Systems for Heating and Cooling of Near Zero Energy Buildings. Strojniški vestnik - Journal of Mechanical Engineering. [Online] 58:7-8

%A Dovjak, Mateja 
%A Shukuya, Masanori 
%A Krainer, Aleš 
%D 2012
%T Exergy Analysis of Conventional and Low Exergy Systems for Heating and Cooling of Near Zero Energy Buildings
%B 2012
%9 human body exergy; building heating and cooling; low exergy system; conventional system; building energy use; individual thermal comfort
%! Exergy Analysis of Conventional and Low Exergy Systems for Heating and Cooling of Near Zero Energy Buildings
%K human body exergy; building heating and cooling; low exergy system; conventional system; building energy use; individual thermal comfort
%X The purpose of the study is to compare two heating and cooling (H/C) systems regarding individual thermal comfort conditions and rational building energy use. Real test room is firstly equipped with low exergy (LowEx) system (i.e. heating-cooling ceiling radiative panels) and secondly with a conventional system (i.e. electric heaters, cooling split system with indoor unit). Additional case presents a thermally noninsulated room equipped with a conventional system. Individual thermal comfort conditionsare analyzed through the simulation of human body exergy balance (hbExB), human body exergy consumption (hbExC) rates and predicted mean votes (PMV) index. Measurements of energy use and control of temperature conditions are performed on an integrated control system (ICsIE) based on fuzzy logic. The results confirm that both systems create comfort conditions if the room is thermally well insulated. In case of non-insulated room there appears cool radiant exergy that often leads to discomfort conditions. More acceptable comfortable conditions (PMV closer to 0) do not always result in a lower hbExC rate. Individual characteristics with experimental conditions have a significant influence on separate parts of hbExB. LowEx system connected with ICsIE enables to set air temperature and mean radiant temperature and creates optimal thermal comfort conditions for individual user. The measured energy use for heating was by 11 to 27% lower for LowEx system than for the conventional system. The energy use for cooling was by 41 to 62% lower for LowEx system. The presented approach of reciprocal consideration of individual thermal comfort conditions and building energy use is important for the future design of H/C systems and for their application in near zero energy buildings.
%U https://www.sv-jme.eu/article/exergy-analysis-of-conventional-and-low-exergy-systems-for-heating-and-cooling-of-near-zero-energy-buildings/
%0 Journal Article
%R 10.5545/sv-jme.2011.158
%& 453
%P 9
%J Strojniški vestnik - Journal of Mechanical Engineering
%V 58
%N 7-8
%@ 0039-2480
%8 2018-06-28
%7 2018-06-28

Dovjak, Mateja, Masanori  Shukuya, & Aleš  Krainer.
"Exergy Analysis of Conventional and Low Exergy Systems for Heating and Cooling of Near Zero Energy Buildings." Strojniški vestnik - Journal of Mechanical Engineering [Online], 58.7-8 (2012): 453-461. Web.  25 Apr. 2024

TY  - JOUR
AU  - Dovjak, Mateja 
AU  - Shukuya, Masanori 
AU  - Krainer, Aleš 
PY  - 2012
TI  - Exergy Analysis of Conventional and Low Exergy Systems for Heating and Cooling of Near Zero Energy Buildings
JF  - Strojniški vestnik - Journal of Mechanical Engineering
DO  - 10.5545/sv-jme.2011.158
KW  - human body exergy; building heating and cooling; low exergy system; conventional system; building energy use; individual thermal comfort
N2  - The purpose of the study is to compare two heating and cooling (H/C) systems regarding individual thermal comfort conditions and rational building energy use. Real test room is firstly equipped with low exergy (LowEx) system (i.e. heating-cooling ceiling radiative panels) and secondly with a conventional system (i.e. electric heaters, cooling split system with indoor unit). Additional case presents a thermally noninsulated room equipped with a conventional system. Individual thermal comfort conditionsare analyzed through the simulation of human body exergy balance (hbExB), human body exergy consumption (hbExC) rates and predicted mean votes (PMV) index. Measurements of energy use and control of temperature conditions are performed on an integrated control system (ICsIE) based on fuzzy logic. The results confirm that both systems create comfort conditions if the room is thermally well insulated. In case of non-insulated room there appears cool radiant exergy that often leads to discomfort conditions. More acceptable comfortable conditions (PMV closer to 0) do not always result in a lower hbExC rate. Individual characteristics with experimental conditions have a significant influence on separate parts of hbExB. LowEx system connected with ICsIE enables to set air temperature and mean radiant temperature and creates optimal thermal comfort conditions for individual user. The measured energy use for heating was by 11 to 27% lower for LowEx system than for the conventional system. The energy use for cooling was by 41 to 62% lower for LowEx system. The presented approach of reciprocal consideration of individual thermal comfort conditions and building energy use is important for the future design of H/C systems and for their application in near zero energy buildings.
UR  - https://www.sv-jme.eu/article/exergy-analysis-of-conventional-and-low-exergy-systems-for-heating-and-cooling-of-near-zero-energy-buildings/

@article{{sv-jme}{sv-jme.2011.158},
	author = {Dovjak, M., Shukuya, M., Krainer, A.},
	title = {Exergy Analysis of Conventional and Low Exergy Systems for Heating and Cooling of Near Zero Energy Buildings},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {58},
	number = {7-8},
	year = {2012},
	doi = {10.5545/sv-jme.2011.158},
	url = {https://www.sv-jme.eu/article/exergy-analysis-of-conventional-and-low-exergy-systems-for-heating-and-cooling-of-near-zero-energy-buildings/}
}

TY  - JOUR
AU  - Dovjak, Mateja 
AU  - Shukuya, Masanori 
AU  - Krainer, Aleš 
PY  - 2018/06/28
TI  - Exergy Analysis of Conventional and Low Exergy Systems for Heating and Cooling of Near Zero Energy Buildings
JF  - Strojniški vestnik - Journal of Mechanical Engineering; Vol 58, No 7-8 (2012): Strojniški vestnik - Journal of Mechanical Engineering
DO  - 10.5545/sv-jme.2011.158
KW  - human body exergy, building heating and cooling, low exergy system, conventional system, building energy use, individual thermal comfort
N2  - The purpose of the study is to compare two heating and cooling (H/C) systems regarding individual thermal comfort conditions and rational building energy use. Real test room is firstly equipped with low exergy (LowEx) system (i.e. heating-cooling ceiling radiative panels) and secondly with a conventional system (i.e. electric heaters, cooling split system with indoor unit). Additional case presents a thermally noninsulated room equipped with a conventional system. Individual thermal comfort conditionsare analyzed through the simulation of human body exergy balance (hbExB), human body exergy consumption (hbExC) rates and predicted mean votes (PMV) index. Measurements of energy use and control of temperature conditions are performed on an integrated control system (ICsIE) based on fuzzy logic. The results confirm that both systems create comfort conditions if the room is thermally well insulated. In case of non-insulated room there appears cool radiant exergy that often leads to discomfort conditions. More acceptable comfortable conditions (PMV closer to 0) do not always result in a lower hbExC rate. Individual characteristics with experimental conditions have a significant influence on separate parts of hbExB. LowEx system connected with ICsIE enables to set air temperature and mean radiant temperature and creates optimal thermal comfort conditions for individual user. The measured energy use for heating was by 11 to 27% lower for LowEx system than for the conventional system. The energy use for cooling was by 41 to 62% lower for LowEx system. The presented approach of reciprocal consideration of individual thermal comfort conditions and building energy use is important for the future design of H/C systems and for their application in near zero energy buildings.
UR  - https://www.sv-jme.eu/article/exergy-analysis-of-conventional-and-low-exergy-systems-for-heating-and-cooling-of-near-zero-energy-buildings/

Dovjak, Mateja, Shukuya, Masanori, AND Krainer, Aleš.
"Exergy Analysis of Conventional and Low Exergy Systems for Heating and Cooling of Near Zero Energy Buildings" Strojniški vestnik - Journal of Mechanical Engineering [Online], Volume 58 Number 7-8 (28 June 2018)