Reddit reviews Heat and Mass Transfer: Fundamentals and Applications

I recommend all books by Cengel including Heat and Mass Transfer: Fundamentals and Applications

This review from amazon is apt:

>Be very competent with differential equations, basic thermodynamics, and fluid mechanics, because winter is coming.

If you don't want to do the math then you either hope someone on reddit does it for free, or pay someone to do it, or forget the math and do some testing.

If you're in the aerospace industry, Spacecraft Thermal Control Handbook is a fantastic resource. Another text we use often in our thermal group is Handbook of Applied Thermal Design. These two in combination with a general university level heat transfer textbook (I use Heat and Mass Transfer just because I have it from undergrad) should cover what you need for the thermal side.

The reality is the differences in sensor data will NOT be that great unless you have a massive heat source and massive heat sink that are near each other and their temperatures differ a lot. Heat transfer resulting in temperature variation proportional to the thermal gradient.

Multiple sensors are only to get a single more accurate value or to do wet bulb/dry bulb data.

The averages are to remove the small variances you might still get.

Sometimes averaging is to remove sensor variances rather than actual air temperature variances because it can be cheaper to do "calibrate" that way than to add more circuitry to calibrate.

Or averaging is used to drop the noise floor of a cheap-ass sensor chosen for economic reasons that otherwise would not be accurate enough.

For meteorological measurements resulting in wide temperature variation between sensors are seldom the case.

You can see fronts move though a location because that can sometimes result in 10ºF-20ºF change within a 30-90 seconds window but otherwise temperature within a local area usually a very uniform thing. Temperature variations usually occur in the 10-90 minute range of times.

Temperature measurements for meteorology are explicitly defined to be in shade and not direct sun ever exactly for this reason. That's why most "professional" meteorological stations have the instruments in those little white boxes with the slats: they provide shade and still air. Both are required for accurate dry bulb and wet bulb temperature using old-timey meteorological instruments (web bulb is literally wet with water so air blowing over it screws up the data aka "convective heat transfer plus latent heat extraction").

These days we have ICs that can directly measure relative humidity though not as accurately as dry/wet bulb measurements.

On the other hand, cheapo weather stations will have more problems with this but averaging will NOT generally fix the problem of cheap sensor or not positioning the sensors in shade and still air.

If/when there is an issue of sensors not agreeing, YOU the engineer have to consider heat transfer theory/practice because that's how and why temperature can vary and give varying data on "otherwise identical" sensors. If there is a problem, that's how you know.

[Lienhard's Heat Transfer (pdf)](
http://www.engineering108.com/Data/Engineering/Mechanical/HMT/heat_transfer_John_H_Lienhard.pdf)

I also like Cengal:

[Heat and Mass Transfer: Fundamentals and Applications](
https://www.amazon.com/Heat-Mass-Transfer-Fundamentals-Applications/dp/0073398187/)

Heat transfer IMO is pretty fun but of course my father was an ME specializing in HVAC so a lot of his love and skills for it rubbed off on me.

If you do projects like this, it's useful to understand the basics of heat transfer. The key ways heat is moved from point A to point B are:

• Conductive Transfer
  
• Radiative Transfer
  
• Convective Transfer
  
  Different processes have different characteristics and are dominant if different situations. E.g. with temperature differences over 100-200C involving air, radiative transfer is far stronger than conductive transfer and even convective transfer (e.g. a wood stove transfers more watts of heat by radiation than by other means). Other situations are different.

Looking for Solution Manuals for:

Fundamentals of Chemical Engineering Thermodynamics 1st Edition by Kevin D. Dahm & Donald P. Visco

ISBN: 1111580707


Heat and Mass Transfer: Fundamentals and Applications 5th Edition by Yunus A. Cengel &‎ Afshin J. Ghajar

ISBN: 0073398187

Offer 10$ ... Thanks.