Temperature Reduction in Shaded Areas Under the Sun

What is the temperature of the steam?

The temperature of the Supply Air Stream inside the Duct does not matter as the Humidifier is a stand alone unit about 3 meters away, sitting under the bare Sun. The effort is to somehow by providing a metal enclosure or an insulated enclosure bring down the ambient 52 degree temp down to 40 degrees. These temperatures are experienced for about 3 months in the summer. The Unit is in operation throughout the year to deliver the required Humidity in the otherwise dry atmosphere where the Relative Humidity is about 10 to 15 percent much throughout the year.

What is the temperature of the steam? The forum still doesn't know!

You don't say where you are located. If this control sits there year-round, then even with shading, insulation and good ventilation the control could still experience temps exceeding 40C. Perhaps the water being send to the humidifier can be used to keep the control cool by means of a heat exchanger and fan. And/or maybe a thermoelectric cooler. Or, if you don't need the humidifier in the summer, shut it down and store the controller in an A/C'd storage location for those few months.

Or you could inquire from the manufacturer what max temp the controller is actually rated at, and then decide what to do.

This is the question. What temperature would be seen by the controls if they are under the shade or say in an enclosure. As stated previously the ambient still air temperature is 52 degrees celcius. The entire effort is to somehow bring down the temperature inside the enclosure to 40 degrees. These temperatures are experienced for about 3 months in the summer. The Unit is in operation throughout the year to deliver the required Humidity in the otherwise dry atmosphere where the Relative Humidity is about 10 to 15 percent much throughout the year.

To reword the question, if the ambient temperature is 52 degrees, how much would it be in a shaded place on the roof?

Usually ambient temperature is 52 measured in the shade.

In the sun it will be much hotter.

Old thread and I score an off topic. Haha how funny given that OP has been given that information in various other posts.

your behavior at the time was professional

You should see me at work!

I wonder how you work. On the computer or in the field or both.

Anyway wishing you the best.

Thanks for the response.

More another time.

What do you think?

Outdoor ambient temperatures are normally taken in shade, so I think you still get 52°C--unless you are measuring the ambient temperature differently.

In a dry climate, a small evaporative cooler could be used to cool the electronic controls.

Tornado's response is the closest hit. Forgetting the humidifier business for a moment and going to basics instead, the question is reworded as follows:

When the ambient temperature is 52 Degrees C in unshaded atmosphere, what would be the approximate temperature at sea level, still air conditions under a shade? How can this be calculated or is this purely empirical?

The problem is in the conviction that a temperature-measuring device exposed to direct solar radiation yields "ambient temperature" It doesn't. "Ambient temperature" is the air temperature measured in the manner suggested by Tornado. In the shade.

There is no simple relationship between the ambient temperature and a, say, surface exposed to the sun. Is the exposed surface of black steel or white painted wood?

The OP needs to focus on the ambient temperature and that will give the operating conditions within a properly designed enclosure. If this is in excess of what is desirable, then means of supplementary cooling can be considered

Okay: The ambient temperature of 52 degrees was air temperature measured in the Shade as per consensus of Baffled and Tornado. So what would be the temperature if the thermometer at that location was exposed directly to the Sun? What I am trying to do here is to correlate the two readings. Suppose the thermometer is filled with mercury or other fluid and the sensing bulb is the color of mercury (in case of mercury filled thermometer). Conversely, should it be taken as a close enough approximation (from empirical readings) that the difference between the two is 5 degrees? and is that difference constant for all temperatures? For example when under the shade measurement is 52, without the shade it can be taken as 57 and when the ambient is 25 degrees, can the directly exposed to Sun temperature be supposed to be 30 degrees?