Infrared thermography

Maintenance of process installation is still a necessity to realise high process reliability. Infrared thermography is becoming more and more an useful tool for predictive maintenance in the process and electrical industry. 

These advantages makes infrared thermography the fasted growing NDT method in now a days industry. 

Reliable micro-scale measurement and control of the temperature are required in developing thermal micro-devices. Available measurement techniques can be largely classified into contact and non-contact groups. While the resistance thermometer, thermocouples, thermodiodes, and thermotransistors measure temperature at specific points in contact with them, infrared thermography, thermochromic liquid crystals (TLC), and temperature-sensitive fluorescent dyes cover the whole temperature field (Yoo 2006). 

Relative Quantification of Catalytic Activity in Combinatorial Libraries by Emissivity-Corrected Infrared Thermography... 

Out-of-limit temperatures for rotating mechanical components and systems are usually based on values established by the manufacturers. Pump and compressor equipment that could benefit from an infrared thermography inspection program include motor gears, bearings, shafts, couplings, V—belts, pulleys, compressors, vacuum pumps, and clutches. 

Heat loss in buildings has been estimated by several techniques. Some recent approaches utilize instruments that relate infrared surface radiation to heat flow. Infrared thermography... 

Snell. John R. Jr., The Power of Infrared Thermography Seeing New Solutions to Old Problems, Plant Services 16, no. 4, April 1995 pp. 79-82. 

Thus, we take advantage of the accuracy, robustness and efficiency of the direct problem solution, to tackle the associated inverse heat transfer problem analysis [26, 27] towards the simultaneous estimation of momentum and thermal accommodation coefficients in micro-channel flows with velocity slip and temperature jump. A Bayesian inference approach is adopted in the solution of the identification problem, based on the Monte Carlo Markov Chain method (MCMC) and the Metropolis-Hastings algorithm [28-30]. Only simulated temperature measurements at the external faces of the channel walls, obtained for instance via infrared thermography [30], are used in the inverse analysis in order to demonstrate the capabilities of the proposed approach. A sensitivity analysis allows for the inspection of the identification problem behavior when the external wall Biot number is also included among the parameters to be estimated. 

Next, the inverse problem solution is illustrated, by adopting the governing parameters as indicated in Ref [24], related to N2 flow in a silicon channel, with the representative values Pv = 1.5, Pt = 2.0, Kn = 0.025, and Bi = 1.0. Only wall temperature measurements, obtained from simulated data, are employed in this work, which may be obtained for instance through infrared thermography [30]. 

The dynamic phenomena associated with the rhodium-catalyzed oxidation of carbon monoxide, methane and propane have been studied by in-situ infrared thermography. High-resolution temperature maps of the reacting catalyst revealed the mobility of the reaction front during ignition and extinction of the CO oxidation, and the development of thermokinetic oscillations. The catalytic oxidation of methane and propane produced weaker dynamics. Chemisorption and kinetic experiments suggest that the competitive adsorption of the reactants and the occurrence of self-inhibition, represent key factors in the development of the observed transient effects. 

Infrared imaging was utilized in several studies of spatial effects in exothermic catalytic reactions over model catalysts, such as isolated particles, wafers, plates, discs [2]. Our approach has been to characterize the catalysts directly in a packed-bed microreactor, under realistic reaction conditions. In-situ measurements by infrared thermography of the adsorption properties of catalytic materials have been previously reported [6]. In the present study, the catalytic oxidation of compounds having different chemical properties was investigated by the same technique, with the aim of obtaining comparative data useful to better understand the factors governing the complex phenomena associated with catalytic combustion. 

This paper highlighted the recent efforts to apply three NDT methods, i.e., the infrared thermography. X-ray radiography, and industrial computed tomography (CT), to detect the blind holes in a C/SiC composite panel, and then to evaluate the abilities of these used NDT techniques for detecting the artificial defects. 

Infrared thermography Infrared imaging has been used to identify the location and spatial variability of SGD by exploiting the temperature difference between surface water and groundwater at certain times of the year. While this technique is quite useful for identifying spatial discharge patterns, it has not yet been applied to estimating flow rates. 

Infrared thermography is a very attractive method for the detection of catalytic activity 15). As it is an optical inspection , it can be applied to all kinds of libraries and screening reactions. The detection of catalytic activity is based on reaction enthalpy (negative or positive) 16). As most oxidation reactions are significantly exothermic, IR thermography lends itself very well as a sensitive tool for the discovery of oxidation catalysts (see Section II. C) 17). 

Infrared thermography, 1614 Inheritance (OOP), 71-72, 291, 292, 1328 Initial-condition bias, 2477-2483 direction of, 2479-2483 remedial measures for, 2478-2479 Initial graphics exchange specification (IGES), 192-193... 

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