A review of the surface heat transfer coefficients of radiant heating and cooling systems

Jun Shinoda*, Ongun Berk Kazanci, Shin-ichi Tanabe, Bjarne W. Olesen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Heat transfer coefficients are often used to describe the thermal behavior of radiant systems in buildings and how they transfer heat between their cooled/heated surfaces and the room. In addition to current standards, several studies have been conducted to determine such heat transfer coefficients by means of experiments and simulations. Inconsistency is evident in the values and expressions derived for this purpose. The present study investigated possible sources of discrepancy in an extensive literature review of articles, standards and guidelines that focus on the heat transfer coefficients of cooled/heated surfaces. Measurement data provided by different authors were analyzed to compare both the amount of heat transfer and the estimated heat transfer coefficients. These estimated values and expressions were used to predict the measured data reported in other articles, to examine their accuracy. Larger deviations and prediction errors were found in the total and convective heat transfer values than in radiant heat transfer, which had a range of errors within ±20% throughout the literature. The major sources of error were shown to be the calculation procedure for each heat transfer mechanism, the choice of reference temperature and its measurement height and position, and room dimensions. It is suggested that heat transfer coefficients should be chosen by matching the calculation/measurement conditions in which they were obtained to the purpose and conditions in which they will be applied.
Original languageEnglish
Article number106156
JournalBuilding and Environment
Volume159
Number of pages14
ISSN0360-1323
DOIs
Publication statusPublished - 2019

Keywords

  • Radiant heating and cooling
  • Surface heat transfer coefficient
  • Reference temperature
  • Measurement conditions
  • Radiation
  • Convection

Cite this

@article{9ab8ba4feed2415a93e1ad541d964b40,
title = "A review of the surface heat transfer coefficients of radiant heating and cooling systems",
abstract = "Heat transfer coefficients are often used to describe the thermal behavior of radiant systems in buildings and how they transfer heat between their cooled/heated surfaces and the room. In addition to current standards, several studies have been conducted to determine such heat transfer coefficients by means of experiments and simulations. Inconsistency is evident in the values and expressions derived for this purpose. The present study investigated possible sources of discrepancy in an extensive literature review of articles, standards and guidelines that focus on the heat transfer coefficients of cooled/heated surfaces. Measurement data provided by different authors were analyzed to compare both the amount of heat transfer and the estimated heat transfer coefficients. These estimated values and expressions were used to predict the measured data reported in other articles, to examine their accuracy. Larger deviations and prediction errors were found in the total and convective heat transfer values than in radiant heat transfer, which had a range of errors within ±20{\%} throughout the literature. The major sources of error were shown to be the calculation procedure for each heat transfer mechanism, the choice of reference temperature and its measurement height and position, and room dimensions. It is suggested that heat transfer coefficients should be chosen by matching the calculation/measurement conditions in which they were obtained to the purpose and conditions in which they will be applied.",
keywords = "Radiant heating and cooling, Surface heat transfer coefficient, Reference temperature, Measurement conditions, Radiation, Convection",
author = "Jun Shinoda and Kazanci, {Ongun Berk} and Shin-ichi Tanabe and Olesen, {Bjarne W.}",
year = "2019",
doi = "10.1016/j.buildenv.2019.05.034",
language = "English",
volume = "159",
journal = "Building and Environment",
issn = "0360-1323",
publisher = "Pergamon Press",

}

A review of the surface heat transfer coefficients of radiant heating and cooling systems. / Shinoda, Jun; Kazanci, Ongun Berk; Tanabe, Shin-ichi; Olesen, Bjarne W.

In: Building and Environment, Vol. 159, 106156, 2019.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - A review of the surface heat transfer coefficients of radiant heating and cooling systems

AU - Shinoda, Jun

AU - Kazanci, Ongun Berk

AU - Tanabe, Shin-ichi

AU - Olesen, Bjarne W.

PY - 2019

Y1 - 2019

N2 - Heat transfer coefficients are often used to describe the thermal behavior of radiant systems in buildings and how they transfer heat between their cooled/heated surfaces and the room. In addition to current standards, several studies have been conducted to determine such heat transfer coefficients by means of experiments and simulations. Inconsistency is evident in the values and expressions derived for this purpose. The present study investigated possible sources of discrepancy in an extensive literature review of articles, standards and guidelines that focus on the heat transfer coefficients of cooled/heated surfaces. Measurement data provided by different authors were analyzed to compare both the amount of heat transfer and the estimated heat transfer coefficients. These estimated values and expressions were used to predict the measured data reported in other articles, to examine their accuracy. Larger deviations and prediction errors were found in the total and convective heat transfer values than in radiant heat transfer, which had a range of errors within ±20% throughout the literature. The major sources of error were shown to be the calculation procedure for each heat transfer mechanism, the choice of reference temperature and its measurement height and position, and room dimensions. It is suggested that heat transfer coefficients should be chosen by matching the calculation/measurement conditions in which they were obtained to the purpose and conditions in which they will be applied.

AB - Heat transfer coefficients are often used to describe the thermal behavior of radiant systems in buildings and how they transfer heat between their cooled/heated surfaces and the room. In addition to current standards, several studies have been conducted to determine such heat transfer coefficients by means of experiments and simulations. Inconsistency is evident in the values and expressions derived for this purpose. The present study investigated possible sources of discrepancy in an extensive literature review of articles, standards and guidelines that focus on the heat transfer coefficients of cooled/heated surfaces. Measurement data provided by different authors were analyzed to compare both the amount of heat transfer and the estimated heat transfer coefficients. These estimated values and expressions were used to predict the measured data reported in other articles, to examine their accuracy. Larger deviations and prediction errors were found in the total and convective heat transfer values than in radiant heat transfer, which had a range of errors within ±20% throughout the literature. The major sources of error were shown to be the calculation procedure for each heat transfer mechanism, the choice of reference temperature and its measurement height and position, and room dimensions. It is suggested that heat transfer coefficients should be chosen by matching the calculation/measurement conditions in which they were obtained to the purpose and conditions in which they will be applied.

KW - Radiant heating and cooling

KW - Surface heat transfer coefficient

KW - Reference temperature

KW - Measurement conditions

KW - Radiation

KW - Convection

U2 - 10.1016/j.buildenv.2019.05.034

DO - 10.1016/j.buildenv.2019.05.034

M3 - Journal article

VL - 159

JO - Building and Environment

JF - Building and Environment

SN - 0360-1323

M1 - 106156

ER -