A quantitative relationship between heat gain and local cooling load in a general non-uniform indoor environment

Chao Liang, Xianting Li*, Arsen Krikor Melikov, Xiaoliang Shao, Baoming Li

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Reasonable quantification of space cooling load is helpful to utilize effectively the ventilation systems in a built environment. Studies have shown that the local cooling load (LCL) in a general non-uniform indoor environment is typically not equal to the heat gain. However, the quantitative relationship between heat gain and LCL is still unclear. Based on the analytical expression of non-uniform air temperature distribution, a quantitative relational expression between them is derived theoretically in this study. Experiments are conducted for validation, and six cases are designed for further demonstration. The results indicate that the LCL is equal to the sum of the products of the individual heat gain and its influence to local zone. The influence of one heat gain to local zone is described with the average accessibility of heat source (AAHS), and it can be less than, equal to or greater than 1. The air distribution system, heat sources distribution, and target zone have a big impact on the AAHS, which ranges from 0.40 to 1.67 in six cases. The established quantitative relationship between heat gain and LCL can provide theoretical guidance for designing air terminals and reducing the air-conditioning load in a general non-uniform indoor environment.
Original languageEnglish
JournalEnergy
Volume182
Pages (from-to)412-423
ISSN0360-5442
DOIs
Publication statusPublished - 2019

Keywords

  • Non-uniform indoor environment
  • Local cooling load
  • Temperature distribution
  • Ventilation
  • Local air conditioning
  • Accessibility of heat source

Cite this

Liang, Chao ; Li, Xianting ; Melikov, Arsen Krikor ; Shao, Xiaoliang ; Li, Baoming. / A quantitative relationship between heat gain and local cooling load in a general non-uniform indoor environment. In: Energy. 2019 ; Vol. 182. pp. 412-423.
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title = "A quantitative relationship between heat gain and local cooling load in a general non-uniform indoor environment",
abstract = "Reasonable quantification of space cooling load is helpful to utilize effectively the ventilation systems in a built environment. Studies have shown that the local cooling load (LCL) in a general non-uniform indoor environment is typically not equal to the heat gain. However, the quantitative relationship between heat gain and LCL is still unclear. Based on the analytical expression of non-uniform air temperature distribution, a quantitative relational expression between them is derived theoretically in this study. Experiments are conducted for validation, and six cases are designed for further demonstration. The results indicate that the LCL is equal to the sum of the products of the individual heat gain and its influence to local zone. The influence of one heat gain to local zone is described with the average accessibility of heat source (AAHS), and it can be less than, equal to or greater than 1. The air distribution system, heat sources distribution, and target zone have a big impact on the AAHS, which ranges from 0.40 to 1.67 in six cases. The established quantitative relationship between heat gain and LCL can provide theoretical guidance for designing air terminals and reducing the air-conditioning load in a general non-uniform indoor environment.",
keywords = "Non-uniform indoor environment, Local cooling load, Temperature distribution, Ventilation, Local air conditioning, Accessibility of heat source",
author = "Chao Liang and Xianting Li and Melikov, {Arsen Krikor} and Xiaoliang Shao and Baoming Li",
year = "2019",
doi = "10.1016/j.energy.2019.06.055",
language = "English",
volume = "182",
pages = "412--423",
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A quantitative relationship between heat gain and local cooling load in a general non-uniform indoor environment. / Liang, Chao; Li, Xianting; Melikov, Arsen Krikor; Shao, Xiaoliang; Li, Baoming.

In: Energy, Vol. 182, 2019, p. 412-423.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - A quantitative relationship between heat gain and local cooling load in a general non-uniform indoor environment

AU - Liang, Chao

AU - Li, Xianting

AU - Melikov, Arsen Krikor

AU - Shao, Xiaoliang

AU - Li, Baoming

PY - 2019

Y1 - 2019

N2 - Reasonable quantification of space cooling load is helpful to utilize effectively the ventilation systems in a built environment. Studies have shown that the local cooling load (LCL) in a general non-uniform indoor environment is typically not equal to the heat gain. However, the quantitative relationship between heat gain and LCL is still unclear. Based on the analytical expression of non-uniform air temperature distribution, a quantitative relational expression between them is derived theoretically in this study. Experiments are conducted for validation, and six cases are designed for further demonstration. The results indicate that the LCL is equal to the sum of the products of the individual heat gain and its influence to local zone. The influence of one heat gain to local zone is described with the average accessibility of heat source (AAHS), and it can be less than, equal to or greater than 1. The air distribution system, heat sources distribution, and target zone have a big impact on the AAHS, which ranges from 0.40 to 1.67 in six cases. The established quantitative relationship between heat gain and LCL can provide theoretical guidance for designing air terminals and reducing the air-conditioning load in a general non-uniform indoor environment.

AB - Reasonable quantification of space cooling load is helpful to utilize effectively the ventilation systems in a built environment. Studies have shown that the local cooling load (LCL) in a general non-uniform indoor environment is typically not equal to the heat gain. However, the quantitative relationship between heat gain and LCL is still unclear. Based on the analytical expression of non-uniform air temperature distribution, a quantitative relational expression between them is derived theoretically in this study. Experiments are conducted for validation, and six cases are designed for further demonstration. The results indicate that the LCL is equal to the sum of the products of the individual heat gain and its influence to local zone. The influence of one heat gain to local zone is described with the average accessibility of heat source (AAHS), and it can be less than, equal to or greater than 1. The air distribution system, heat sources distribution, and target zone have a big impact on the AAHS, which ranges from 0.40 to 1.67 in six cases. The established quantitative relationship between heat gain and LCL can provide theoretical guidance for designing air terminals and reducing the air-conditioning load in a general non-uniform indoor environment.

KW - Non-uniform indoor environment

KW - Local cooling load

KW - Temperature distribution

KW - Ventilation

KW - Local air conditioning

KW - Accessibility of heat source

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