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Conductive Heat Transfer

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: […]

Heating Up, But Slowly

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 […]

Cold and Getting Colder (at least north of the equator)

We’ve turned the calendar to a new month and year—Happy New Year readers! We’ve also turned the corner of the Winter Solstice, at least here in the Northern Hemisphere, and are headed to longer days.

We may be getting more daylight, but it will be about six more weeks until the average temperature begins to increase. […]

Learning From Each Other

One of my Thermal Resolutions for 2011 was as follows:
“I’ve learned nearly all I know about thermography from others and have, honestly, barely scratched the surface, so I resolve to learn more from my professional colleagues.”

I was fortunate to visit the home of Sir William Herschel in the Fall of 2010. Here I am […]

Accurate but not Exact

As we inevitably move into winter here in Vermont, talk often turns to the weather, and in particular, the temperature. We all live with some unrealistic illusions about temperature. For instance, people can be tricked into thinking they are comfortable simply by adjusting a thermometer to show a slightly higher temperature, and in fact they […]

Winter Arrives

I captured this photograph last week at sunrise showing that winter has come to the small town of Montpelier, Vermont where I live. The golden dome of our statehouse can be seen in the lower right against a backdrop of the Green Mountains.

Here in Vermont, as well as in much of the rest of […]

Predicting the IR Market

One year ago I made some predictions about where I thought the market might be headed (click here to read full post). It is useful, I think, to see how today’s reality compares with yesterday’s dreams.

• A $1,000 imager

We are close, but thankfully not yet there. Sales of lower-cost systems continue to grow. This has […]

Energy Balance

The Thanksgiving feast was delicious and the leftovers were too. I’m certain my calorie intake over the past week is quite out of balance with my use of energy.

A wooden kitchen match, burned entirely, gives off approximately on British Thermal Unit (Btu) of energy. One Calorie is the energy equivalent of burning four kitchen […]

Chip Wade Inspects a Commercial Property

Many of the same principles of a thermal inspection in a home can be applied to a commercial property inspection.  In this video, Chip Wade shows you how you can take your business to the next level by offering commercial property inspections. He spots a problem in a warehouse that is being converted to an […]

Things Get Hot for our Friend

We left our friend, Mr. Turkey, warm and happy in last week’s blog post.

Last week we left our wildlife friend, Mr. Turkey, exposed and thermally obvious. You can imagine what happened between then and this week.

So let’s talk again talk about capacitance , the thermal concept so fundamental to much of our work. Whether […]