Experimental and Theoretical Study on the Internal Convective and Radiative Heat Transfer Coefficients for a Vertical Wall in a Residential Building
Experimental studies on internal convective (CHTC) and radiative (RHTC) heat transfer coefficients are very rarely conducted in real conditions during the normal use of buildings. This study presents the results of measurements of CHTC and RHTC for a vertical wall, taken in a selected room of a sing...
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MDPI AG
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| Online Access: | https://www.mdpi.com/1996-1073/14/18/5953 |
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| author | Piotr Michalak |
| author_facet | Piotr Michalak |
| author_sort | Piotr Michalak |
| collection | DOAJ |
| description | Experimental studies on internal convective (CHTC) and radiative (RHTC) heat transfer coefficients are very rarely conducted in real conditions during the normal use of buildings. This study presents the results of measurements of CHTC and RHTC for a vertical wall, taken in a selected room of a single-family building during its everyday use. Measurements were performed using HFP01 heat flux plates, Pt1000 sensors for internal air and wall surface temperatures and a globe thermometer for mean radiant temperature measured in 10 min intervals. Measured average CHTC and RHTC amounted to 1.15 W/m<sup>2</sup>K and 5.45 W/m<sup>2</sup>K, compared to the 2.50 W/m<sup>2</sup>K and 5.42 W/m<sup>2</sup>K recommended by the EN ISO 6946, respectively. To compare with calculated CHTC, 14 correlations based on the temperature difference were applied. Obtained values were from 1.31 W/m<sup>2</sup>K (given by Min et al.) to 3.33 W/m<sup>2</sup>K (Wilkes and Peterson), and in all cases were greater than the 1.15 W/m<sup>2</sup>K from measurements. The average value from all models amounted to 2.02 W/m<sup>2</sup>K, and was greater than measurements by 75.6%. The quality of models was also estimated using average absolute error (AAE), average biased error (ABE), mean absolute error (MAE) and mean bias error (MBE). Based on these techniques, the model of Fohanno and Polidori was identified as the best with AAE = 68%, ABE = 52%, MAE = 0.41 W/m<sup>2</sup>K and MBE = 0.12 W/m<sup>2</sup>K. |
| first_indexed | 2024-03-10T07:42:37Z |
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| id | doaj.art-74fe4f83f0654a3db6d2a7082e2a957a |
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| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T07:42:37Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-74fe4f83f0654a3db6d2a7082e2a957a2023-11-22T12:55:36ZengMDPI AGEnergies1996-10732021-09-011418595310.3390/en14185953Experimental and Theoretical Study on the Internal Convective and Radiative Heat Transfer Coefficients for a Vertical Wall in a Residential BuildingPiotr Michalak0Department of Power Systems and Environmental Protection Facilities, Faculty of Mechanical Engineering and Robotics, AGH University of Science and Technology, Mickiewicza 30, 30-059 Kraków, PolandExperimental studies on internal convective (CHTC) and radiative (RHTC) heat transfer coefficients are very rarely conducted in real conditions during the normal use of buildings. This study presents the results of measurements of CHTC and RHTC for a vertical wall, taken in a selected room of a single-family building during its everyday use. Measurements were performed using HFP01 heat flux plates, Pt1000 sensors for internal air and wall surface temperatures and a globe thermometer for mean radiant temperature measured in 10 min intervals. Measured average CHTC and RHTC amounted to 1.15 W/m<sup>2</sup>K and 5.45 W/m<sup>2</sup>K, compared to the 2.50 W/m<sup>2</sup>K and 5.42 W/m<sup>2</sup>K recommended by the EN ISO 6946, respectively. To compare with calculated CHTC, 14 correlations based on the temperature difference were applied. Obtained values were from 1.31 W/m<sup>2</sup>K (given by Min et al.) to 3.33 W/m<sup>2</sup>K (Wilkes and Peterson), and in all cases were greater than the 1.15 W/m<sup>2</sup>K from measurements. The average value from all models amounted to 2.02 W/m<sup>2</sup>K, and was greater than measurements by 75.6%. The quality of models was also estimated using average absolute error (AAE), average biased error (ABE), mean absolute error (MAE) and mean bias error (MBE). Based on these techniques, the model of Fohanno and Polidori was identified as the best with AAE = 68%, ABE = 52%, MAE = 0.41 W/m<sup>2</sup>K and MBE = 0.12 W/m<sup>2</sup>K.https://www.mdpi.com/1996-1073/14/18/5953convectionradiationheat transfer coefficientcorrelation |
| spellingShingle | Piotr Michalak Experimental and Theoretical Study on the Internal Convective and Radiative Heat Transfer Coefficients for a Vertical Wall in a Residential Building Energies convection radiation heat transfer coefficient correlation |
| title | Experimental and Theoretical Study on the Internal Convective and Radiative Heat Transfer Coefficients for a Vertical Wall in a Residential Building |
| title_full | Experimental and Theoretical Study on the Internal Convective and Radiative Heat Transfer Coefficients for a Vertical Wall in a Residential Building |
| title_fullStr | Experimental and Theoretical Study on the Internal Convective and Radiative Heat Transfer Coefficients for a Vertical Wall in a Residential Building |
| title_full_unstemmed | Experimental and Theoretical Study on the Internal Convective and Radiative Heat Transfer Coefficients for a Vertical Wall in a Residential Building |
| title_short | Experimental and Theoretical Study on the Internal Convective and Radiative Heat Transfer Coefficients for a Vertical Wall in a Residential Building |
| title_sort | experimental and theoretical study on the internal convective and radiative heat transfer coefficients for a vertical wall in a residential building |
| topic | convection radiation heat transfer coefficient correlation |
| url | https://www.mdpi.com/1996-1073/14/18/5953 |
| work_keys_str_mv | AT piotrmichalak experimentalandtheoreticalstudyontheinternalconvectiveandradiativeheattransfercoefficientsforaverticalwallinaresidentialbuilding |