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Last week I talked about how to move yourself and your imager into the best position to get good thermal data. Another big part of being successful is understanding and following professional thermography standards. Like a good time-tested recipe, these help us get high quality, consistent results. As I’ve said before, I’ve made plenty of mistakes [...] We’ve spent the past several weeks discussing heat transfer. Radiation is a special mode of transfer because that is the mode by which energy is transferred from surfaces to our imagers. All of what we see in the thermal image is nearly always based on the amount of radiation emitted from or reflected by the surface. [...] As we continue the discussion about convective heat transfer, it is useful to define two types of convection, natural and forced. When quantities of fluids are moved in either way, we also use the term “bulk energy transfer” because it is really the movement of the fluid itself, and the energy inherent in it, that [...] As thermography professionals, we must be well grounded in the basics of heat transfer. If not, we’ll make mistakes in understanding, interpreting, and presenting our data. If you don’t feel 100% confident in your understanding, I urge you to move in that direction and will offer these posts as simple starting points. Convection happens in [...] Last week, we talked about that mug of coffee and transient heat flow. The temperature of many surfaces is constantly changing because of an imbalance in the transfer of energy with the surroundings. When things balance, reaching what we call steady-state transfer, then temperatures stabilize. We have all heard about the three modes of heat transfer: [...] Last week we talked about that mug of coffee and the notion of thermal capacitance. Thermal persistence is another way to think of this concept. To one degree or another things are slow to change temperature. This is due to both the way heat is transferred (convection is rapid while conduction tends to be slower)and the [...] As I’ve written about over the past two weeks, there are a number of factors that determine what the temperature of a surface will be beside the energy inherent to it. We need to understand them so that we can make a valid analysis of what is really going on. As an example, imagine an abnormally [...] Have you been hearing about the benefits of thermal imaging, but aren’t quite sure exactly what it is or how it can help you? In this short video, we take a step back and explain what thermal imaging actually is. We cover the basic principles of how the camera works and a few of the [...] A tea cozy keeps a pot of tea warmer longer by reducing heat transfer, primarily conductive transfer. My blog last week was changed at the last minute to talk about Hurricane Irene. Although she “cooled” compared to what was predicted, the damage was significant, especially here in Vermont where 7 inches of rain in our [...] Buildings and equipment do not maintain themselves. When it comes to preventive maintenance, you have to proactively seek out problems before they occur to prevent unplanned downtime. Thermography can be an invaluable tool to prolong equipment life, save money and increase the safety of your workforce. If it’s your job to keep everything running smoothly [...] |
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