Correlations for Heat Transport by Natural Convection of Cylindrical Surfaces Situated One above the Other
The paper presents a new criterion equation for calculating the Nusselt number for heat transport by natural convection from different numbers of cylindrical surfaces of heating sources. Horizontal cylindrical surfaces are situated one above the other and each of them is independently electrically h...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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University of Žilina
2015-08-01
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| Series: | Communications |
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| Online Access: | https://komunikacie.uniza.sk/artkey/csl-201503-0001_correlations-for-heat-transport-by-natural-convection-of-cylindrical-surfaces-situated-one-above-the-other.php |
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| author | Milan Malcho Jozef Jandacka Tadeas Ochodek Jan Kolonicny |
| author_facet | Milan Malcho Jozef Jandacka Tadeas Ochodek Jan Kolonicny |
| author_sort | Milan Malcho |
| collection | DOAJ |
| description | The paper presents a new criterion equation for calculating the Nusselt number for heat transport by natural convection from different numbers of cylindrical surfaces of heating sources. Horizontal cylindrical surfaces are situated one above the other and each of them is independently electrically heated by constant power output of Joule heating. Correlation relationships were derived on the basis of tens of measurements of heat outputs of the system of electrically heated horizontal cylindrical surfaces in a thermostatic chamber under defined conditions. The number of cylindrical surfaces, their distance and heat output to the horizontal cylinder varied during measurements. The derived criterion equation is significantly simpler compared to equations corrected by polynomial regression. |
| first_indexed | 2024-04-09T18:02:54Z |
| format | Article |
| id | doaj.art-ed68d2ee2d5944619d8061f5bd0b5418 |
| institution | Directory Open Access Journal |
| issn | 1335-4205 2585-7878 |
| language | English |
| last_indexed | 2024-04-09T18:02:54Z |
| publishDate | 2015-08-01 |
| publisher | University of Žilina |
| record_format | Article |
| series | Communications |
| spelling | doaj.art-ed68d2ee2d5944619d8061f5bd0b54182023-04-14T06:31:00ZengUniversity of ŽilinaCommunications1335-42052585-78782015-08-0117341110.26552/com.C.2015.3.4-11csl-201503-0001Correlations for Heat Transport by Natural Convection of Cylindrical Surfaces Situated One above the OtherMilan Malcho0Jozef Jandacka1Tadeas Ochodek2Jan Kolonicny3Department of Power Engineering, Faculty of Mechanical Engineering, University of Zilina, SlovakiaDepartment of Power Engineering, Faculty of Mechanical Engineering, University of Zilina, SlovakiaEnergy Research Center, VSB - Technical University of Ostrava, Ostrava - Poruba, Czech RepublicEnergy Research Center, VSB - Technical University of Ostrava, Ostrava - Poruba, Czech RepublicThe paper presents a new criterion equation for calculating the Nusselt number for heat transport by natural convection from different numbers of cylindrical surfaces of heating sources. Horizontal cylindrical surfaces are situated one above the other and each of them is independently electrically heated by constant power output of Joule heating. Correlation relationships were derived on the basis of tens of measurements of heat outputs of the system of electrically heated horizontal cylindrical surfaces in a thermostatic chamber under defined conditions. The number of cylindrical surfaces, their distance and heat output to the horizontal cylinder varied during measurements. The derived criterion equation is significantly simpler compared to equations corrected by polynomial regression.https://komunikacie.uniza.sk/artkey/csl-201503-0001_correlations-for-heat-transport-by-natural-convection-of-cylindrical-surfaces-situated-one-above-the-other.phpnatural convectioncylindrical surfaces one above the othercriterial equations |
| spellingShingle | Milan Malcho Jozef Jandacka Tadeas Ochodek Jan Kolonicny Correlations for Heat Transport by Natural Convection of Cylindrical Surfaces Situated One above the Other Communications natural convection cylindrical surfaces one above the other criterial equations |
| title | Correlations for Heat Transport by Natural Convection of Cylindrical Surfaces Situated One above the Other |
| title_full | Correlations for Heat Transport by Natural Convection of Cylindrical Surfaces Situated One above the Other |
| title_fullStr | Correlations for Heat Transport by Natural Convection of Cylindrical Surfaces Situated One above the Other |
| title_full_unstemmed | Correlations for Heat Transport by Natural Convection of Cylindrical Surfaces Situated One above the Other |
| title_short | Correlations for Heat Transport by Natural Convection of Cylindrical Surfaces Situated One above the Other |
| title_sort | correlations for heat transport by natural convection of cylindrical surfaces situated one above the other |
| topic | natural convection cylindrical surfaces one above the other criterial equations |
| url | https://komunikacie.uniza.sk/artkey/csl-201503-0001_correlations-for-heat-transport-by-natural-convection-of-cylindrical-surfaces-situated-one-above-the-other.php |
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