Oh you, ... odometric snob

Odiferous, too. Especially in high humidity.

 

One thing that helped me grasp the psychrometric chart is the realization that two vital physical concepts are brought together in one chart

Hey, now I remember! ... the last time I saw that chart I was in college, when studying thermodynamics ... but you gotta cut me some slack, that was 30 years ago! ... and that field is one of my weak spots (more like an entire sector than just a spot). That's why I find this discussion so fascinating.

 

Maybe she'll listen to the app

Just don't tell her that you were the one who wrote it, and things should be fine....

 

Just don't tell her that you were the one who wrote it, and things should be fine....

Absolutely! I've met so many women that believe all men are always lying that I learned to bring written proof that was written by a woman. If you want to control the windows in your house, you need an app created by women and documentation to prove it was created by women.

The thing about the psychrometric chart is that it shows an amazing number of interactions, based on only two substances. Like, no wonder I couldn't intuitively figure out atmospheric moisture. It isn't simple at all, especially when you're riding the line where condensation happens in an air conditioner.

 

I feel so left out because I never was allowed to have a psychrowatsit chart.

 

Like, no wonder I couldn't intuitively figure out atmospheric moisture.

Intuition???? ask a woman!

 

I feel so left out because I never was allowed to have a psychrowatsit chart.

I sent you a free chart in post #979

 

Intuition???? ask a woman!

That's what wayneh is fighting...the intuition of his wife.
Her intuition says the only thing that matters is the dry bulb temperature, not enthalpy.

 

Yeah, it seems like women in general sweat less and therefore are more sensitive to dry bulb. We sweaty beasts care about the wet bulb. And then there are personal preferences. I hate muggy weather but the wife will run out to do her landscaping on the muggiest days of the year. I go down to the basement and fix the dehumidifier.

 

Right now, I'm waiting until 8PM when the heat index goes below 90 so I can work outside.

 

Water vapor does increase temperature density. No doubt. I still can't get over a smartphone app being able to accurately measure DP. Having trouble finding one.

 

...temperate density...

I still don't know what this means.

 

Check out this radar. We're getting all kinds of warnings on the tv.

http://www.wdbj7.com/weather/

 

Check out this radar. We're getting all kinds of warnings on the tv.

http://www.wdbj7.com/weather/

Keep it at your place! I'm working outside tonight.

 

In Tucson, my shaded thermometer reads 100 deg F. Nice breeze though.

This weekend they are expecting record breaking temperatures: 111 to 116 deg. F.

I will have cold beer and spare run and start capacitors for the air conditioner.

 

Today the temp peaked at 39°C (102°F) ... not even the lizards were comfortable under the sun today

 

Water vapor does increase temperature density. No doubt. I still can't get over a smartphone app being able to accurately measure DP. Having trouble finding one.

Software can't measure anything, but it can talk to things that can.

 

That storm turned out be a dud, at least here.

So now you are saying that I can not download an app, go into my root cellar and measure the DP. Right?
I would need more sensors, right?

The reason I'm asking is because there have been times where measuring DP has been a real problem, on past projects. I wasn't directly involved, but it held up my projects. This has been awhile back.

I thought maybe someone had come up with an ACCURATE way to measure DP electronically with sensors.

 

That storm turned out be a dud, at least here.

So now you are saying that I can not download an app, go into my root cellar and measure the DP. Right?
I would need more sensors, right?

The reason I'm asking is because there have been times where measuring DP has been a real problem, on past projects. I wasn't directly involved, but it held up my projects. This has been awhile back.

I thought maybe someone had come up with an ACCURATE way to measure DP electronically with sensors.

If you know both ambient temperature and relative humidity, computing DP is trivial. In fact, I Googled and found this:

http://us.phonegg.com/list/302-Cell-Phones-with-Humidity-Sensor

Now, how fast and accurate the sensors are would be my first question. My second is, is the RH (and Ta) in your pocket or near your face the same as in the local environment?

 

BTW, years ago I developed a little, and highly accurate, temperature/humidity sensor module. It's about an inch by an inch and a half, and uses a one-wire interface to connect to a host MCU. It utilizes a Humerel VC501 humidity sensor, a Microchip MCP9701 thermal sensor, and a PIC16F616 for local processing. I could package this up as a project here on AAC. But only if someone is really interested.





Edit: Sorry. The humidity sensor is Humerel HS1101LF.