Abstract
This paper investigates transient temperature fields of thin metal foil heaters recorded with high-speed infra-red thermography during saturated pool boiling of water at atmospheric pressure. Three different thin heaters were tested: stainless steel (SS316), titanium (Ti) and copper with oxidized superhydrophilic surface (CuO). Experimentally acquired temperature fields were analysed using statistical approach. Samples with lower values of wall-temperature standard deviation and skewness and high values of kurtosis are found to perform better during nucleate boiling regime by providing higher heat transfer coefficient. The same samples had narrower heater-wall temperature distributions with higher peaks. The stainless steel sample exhibited bimodal temperature distributions, which resulted from occurrence of bubbles with relatively large contact diameters and long growth times. In addition to that, it was confirmed that wall temperature distributions are effective tool to distinguish between active nucleation sites and non-active single-phase convection area and also to qualify different bubble evolution cycles.
| Language | English (US) |
|---|---|
| Pages | 205-214 |
| Number of pages | 10 |
| Journal | Experimental Thermal and Fluid Science |
| DOIs | |
| State | Published - Apr 1 2019 |
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Keywords
- Heater-wall temperature distribution
- High-speed IR thermography
- Nucleate pool boiling
- Statistical parameters
ASJC Scopus subject areas
- Chemical Engineering(all)
- Nuclear Energy and Engineering
- Aerospace Engineering
- Mechanical Engineering
- Fluid Flow and Transfer Processes
Cite this
Analysis of heater-wall temperature distributions during the saturated pool boiling of water. / Voglar, Jure; Zupančič, Matevž; Peperko, Aljoša; Birbarah, Patrick; Miljkovic, Nenad; Golobič, Iztok.
In: Experimental Thermal and Fluid Science, 01.04.2019, p. 205-214.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Analysis of heater-wall temperature distributions during the saturated pool boiling of water
AU - Voglar, Jure
AU - Zupančič, Matevž
AU - Peperko, Aljoša
AU - Birbarah, Patrick
AU - Miljkovic, Nenad
AU - Golobič, Iztok
PY - 2019/4/1
Y1 - 2019/4/1
N2 - This paper investigates transient temperature fields of thin metal foil heaters recorded with high-speed infra-red thermography during saturated pool boiling of water at atmospheric pressure. Three different thin heaters were tested: stainless steel (SS316), titanium (Ti) and copper with oxidized superhydrophilic surface (CuO). Experimentally acquired temperature fields were analysed using statistical approach. Samples with lower values of wall-temperature standard deviation and skewness and high values of kurtosis are found to perform better during nucleate boiling regime by providing higher heat transfer coefficient. The same samples had narrower heater-wall temperature distributions with higher peaks. The stainless steel sample exhibited bimodal temperature distributions, which resulted from occurrence of bubbles with relatively large contact diameters and long growth times. In addition to that, it was confirmed that wall temperature distributions are effective tool to distinguish between active nucleation sites and non-active single-phase convection area and also to qualify different bubble evolution cycles.
AB - This paper investigates transient temperature fields of thin metal foil heaters recorded with high-speed infra-red thermography during saturated pool boiling of water at atmospheric pressure. Three different thin heaters were tested: stainless steel (SS316), titanium (Ti) and copper with oxidized superhydrophilic surface (CuO). Experimentally acquired temperature fields were analysed using statistical approach. Samples with lower values of wall-temperature standard deviation and skewness and high values of kurtosis are found to perform better during nucleate boiling regime by providing higher heat transfer coefficient. The same samples had narrower heater-wall temperature distributions with higher peaks. The stainless steel sample exhibited bimodal temperature distributions, which resulted from occurrence of bubbles with relatively large contact diameters and long growth times. In addition to that, it was confirmed that wall temperature distributions are effective tool to distinguish between active nucleation sites and non-active single-phase convection area and also to qualify different bubble evolution cycles.
KW - Heater-wall temperature distribution
KW - High-speed IR thermography
KW - Nucleate pool boiling
KW - Statistical parameters
UR - http://www.scopus.com/inward/record.url?scp=85057458554&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85057458554&partnerID=8YFLogxK
U2 - 10.1016/j.expthermflusci.2018.11.012
DO - 10.1016/j.expthermflusci.2018.11.012
M3 - Article
SP - 205
EP - 214
JO - Experimental Thermal and Fluid Science
T2 - Experimental Thermal and Fluid Science
JF - Experimental Thermal and Fluid Science
SN - 0894-1777
ER -