Application of temperature-sensitive paint for surface temperature measurement in heat transfer enhancement applications

Abstract The paper presents practical aspects of determining the amount of heat flow by measuring the distribution of surface temperature using the Temperature Sensitive Paint (TSP) method. The quantity measured directly with TSP is the intensity of the excited radiation, which is then converted to surface temperature. The article briefly presents three different methods for determining the heat transfer coefficient. Each of these methods is based on a separate set of assumptions and significantly influences the construction of the measuring station. The advantages of each of the presented methods are their individual properties, allowing to improve accuracy, reduce the cost of testing or the possibility of using them in tests of highly complex objects. For each method a mathematical model used to calculate the heat transfer coefficient is presented. For the steady state heat transfer test method that uses a heater of constant and known thermal power, examples of the results of our own research are presented, together with a comparison of the results with available data and a discussion of the accuracy of the results obtained.

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Investigation of Pre-and Post-Dryout Heat Transfer in Upward Steam-Water Two-Phase Flow at Low Flow Rate with Improved Surface Temperature Measurement

Journal of Nuclear Science and Technology ◽

10.1080/18811248.1984.9731141 ◽

1984 ◽

Vol 21 (12) ◽

pp. 965-968

Author(s):

Yasuo KOIZUMI ◽

Hiroshige KUMAMARU ◽

Kanji TASAKA

Keyword(s):

Heat Transfer ◽

Surface Temperature ◽

Temperature Measurement ◽

Flow Rate ◽

Two Phase Flow ◽

Low Flow ◽

Phase Flow ◽

Two Phase ◽

Surface Temperature Measurement ◽

Low Flow Rate

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Numerical investigation on heat transfer enhancement and surface temperature non-uniformity improvement of spray cooling

International Journal of Thermal Sciences ◽

10.1016/j.ijthermalsci.2021.107374 ◽

2021 ◽

pp. 107374

Author(s):

Tao Yang ◽

Wei Zhang ◽

Jianyou Wang ◽

Chuang Liu ◽

Mengzhou Yuan

Keyword(s):

Heat Transfer ◽

Surface Temperature ◽

Heat Transfer Enhancement ◽

Numerical Investigation ◽

Spray Cooling ◽

Transfer Enhancement

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Temperature-Sensitive Paint Applications in the Heat Transfer Analysis of 90° Elbow Microchannel Flow with Sharp and Curved Turns

Journal of Mechanics ◽

10.1017/jmech.2019.71 ◽

2020 ◽

Vol 36 (4) ◽

pp. 551-565

Author(s):

Chih-Yung Huang ◽

Jhih-Ren Lin ◽

Tong-Miin Liou

Keyword(s):

Heat Transfer ◽

Surface Temperature ◽

Constant Heat Flux ◽

Heat Transfer Analysis ◽

Temperature Sensitive ◽

Microchannel Flow ◽

Flux Boundary Condition ◽

Micro Heat Exchanger ◽

Axial Heat ◽

Temperature Sensitive Paint

ABSTRACTThis study presents the heat transfer analysis of 90° elbow microchannel flow with sharp and curved turn designs. Experimental technique of temperature-sensitive paint was adapted in the experiment for measuring both fluid and surface temperature. The detailed information of fluid and surface temperature data were successfully acquired with a microscope system at Reynolds number varying from 50.5 to 101.1. Micro heaters were fabricated and positioned underneath the microchannel to provide the constant heat flux boundary condition. The utilization of micro heaters can prevent the axial heat conduction. The Nusselt number contours were obtained in this study with sharp and curved corners, which can provide detailed information of localized region with high and low heat transfer. The experimental approach performed in this study could be applied in the future for micro heat exchanger or heat sink design with complex microchannel systems.

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