Detailed heat balance analysis of the thermal load variations depending on the blind location and glazing type

Yeo Beom Yoon, Dong Soo Kim, Kwang Ho Lee

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Nowadays, curtain wall is the norm, due to which there is an increase in direct solar gain and heat loss through the window inside the building, causing massive thermal load. Use of blinds has been one of the best counter measures for this. In this study, EnergyPlus modeling has been used to measure the effect of reflectance of blind on heating and cooling load when the blind is located inside or outside for winter and summer condition. Modeling showed that in summer, as blind reflectance increased, cooling load decreased in case of internal blind and increased in case of external blind whereas in winter, the opposite was true for heating load. However, solar energy transmittance increased proportionately with the increase in reflectance of blind irrespective of position in either season. In addition, the heating load profiles under different window material compositions were determined mainly by the U-value variations, which were directly connected to the infrared and convective heat flows from the window into the space. SHGC also showed effect on the heating load to some extent by affecting the solar transmittance and convective and radiant heat flows from the blind into the space.

Original languageEnglish
Pages (from-to)84-95
Number of pages12
JournalEnergy and Buildings
Volume75
DOIs
Publication statusPublished - 2014 Jun 1
Externally publishedYes

Fingerprint

Thermal load
Heating
Heat transfer
Cooling
Heat losses
Solar energy
Infrared radiation
Hot Temperature
Chemical analysis

Keywords

  • Cooling load
  • EnergyPlus
  • External blind
  • Heating load
  • Internal blind
  • Low-E window
  • SHGC
  • U-value

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Cite this

Detailed heat balance analysis of the thermal load variations depending on the blind location and glazing type. / Yoon, Yeo Beom; Kim, Dong Soo; Lee, Kwang Ho.

In: Energy and Buildings, Vol. 75, 01.06.2014, p. 84-95.

Research output: Contribution to journalArticle

@article{db4f306df0c04faca7738940a6653c67,
title = "Detailed heat balance analysis of the thermal load variations depending on the blind location and glazing type",
abstract = "Nowadays, curtain wall is the norm, due to which there is an increase in direct solar gain and heat loss through the window inside the building, causing massive thermal load. Use of blinds has been one of the best counter measures for this. In this study, EnergyPlus modeling has been used to measure the effect of reflectance of blind on heating and cooling load when the blind is located inside or outside for winter and summer condition. Modeling showed that in summer, as blind reflectance increased, cooling load decreased in case of internal blind and increased in case of external blind whereas in winter, the opposite was true for heating load. However, solar energy transmittance increased proportionately with the increase in reflectance of blind irrespective of position in either season. In addition, the heating load profiles under different window material compositions were determined mainly by the U-value variations, which were directly connected to the infrared and convective heat flows from the window into the space. SHGC also showed effect on the heating load to some extent by affecting the solar transmittance and convective and radiant heat flows from the blind into the space.",
keywords = "Cooling load, EnergyPlus, External blind, Heating load, Internal blind, Low-E window, SHGC, U-value",
author = "Yoon, {Yeo Beom} and Kim, {Dong Soo} and Lee, {Kwang Ho}",
year = "2014",
month = "6",
day = "1",
doi = "10.1016/j.enbuild.2014.02.002",
language = "English",
volume = "75",
pages = "84--95",
journal = "Energy and Buildings",
issn = "0378-7788",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Detailed heat balance analysis of the thermal load variations depending on the blind location and glazing type

AU - Yoon, Yeo Beom

AU - Kim, Dong Soo

AU - Lee, Kwang Ho

PY - 2014/6/1

Y1 - 2014/6/1

N2 - Nowadays, curtain wall is the norm, due to which there is an increase in direct solar gain and heat loss through the window inside the building, causing massive thermal load. Use of blinds has been one of the best counter measures for this. In this study, EnergyPlus modeling has been used to measure the effect of reflectance of blind on heating and cooling load when the blind is located inside or outside for winter and summer condition. Modeling showed that in summer, as blind reflectance increased, cooling load decreased in case of internal blind and increased in case of external blind whereas in winter, the opposite was true for heating load. However, solar energy transmittance increased proportionately with the increase in reflectance of blind irrespective of position in either season. In addition, the heating load profiles under different window material compositions were determined mainly by the U-value variations, which were directly connected to the infrared and convective heat flows from the window into the space. SHGC also showed effect on the heating load to some extent by affecting the solar transmittance and convective and radiant heat flows from the blind into the space.

AB - Nowadays, curtain wall is the norm, due to which there is an increase in direct solar gain and heat loss through the window inside the building, causing massive thermal load. Use of blinds has been one of the best counter measures for this. In this study, EnergyPlus modeling has been used to measure the effect of reflectance of blind on heating and cooling load when the blind is located inside or outside for winter and summer condition. Modeling showed that in summer, as blind reflectance increased, cooling load decreased in case of internal blind and increased in case of external blind whereas in winter, the opposite was true for heating load. However, solar energy transmittance increased proportionately with the increase in reflectance of blind irrespective of position in either season. In addition, the heating load profiles under different window material compositions were determined mainly by the U-value variations, which were directly connected to the infrared and convective heat flows from the window into the space. SHGC also showed effect on the heating load to some extent by affecting the solar transmittance and convective and radiant heat flows from the blind into the space.

KW - Cooling load

KW - EnergyPlus

KW - External blind

KW - Heating load

KW - Internal blind

KW - Low-E window

KW - SHGC

KW - U-value

UR - http://www.scopus.com/inward/record.url?scp=84897795254&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84897795254&partnerID=8YFLogxK

U2 - 10.1016/j.enbuild.2014.02.002

DO - 10.1016/j.enbuild.2014.02.002

M3 - Article

AN - SCOPUS:84897795254

VL - 75

SP - 84

EP - 95

JO - Energy and Buildings

JF - Energy and Buildings

SN - 0378-7788

ER -