Where did the 27.5 come from if your dividing 12000 by 30.24? Which equals 396. 🧐 Ok never-mind I see where it comes from…. I think. So, we are using the sensible heat equation (Btu/h=1.1xCFMxTD) rearranged the solve for TD. So, TD=Btu/(1.1xCFM). 12,000/1.1x400=27.27*F…. Right?
@@mackenziegray2090 30 lbs / min needs to be multiplied by 60 min. / hour so it can work with 12000 btu / hour. This is why they need to show the units so we can follow along.
Great catch! He left out a number in the video. 12,000=(30 x 60 x .24) so 12,000/432 = 27.78 and then 27.78 x .75 (average SHR) = the magic 20 degree TD
Thanks all of you to share great knowledge with easier and simple way. So today i got the answered why 20* is rule of thumb, before it's scratches my head. If our scfm is change or flow issues,so delta t will be change.
Thanks Bryan and Adam. I was there when this was recorded, if you have the opportunity to attend a class at MeasureQuick, take advantage of it. Spending time with Jim and Joe, oh and waffles (can’t leave him out) is something I highly recommend.
The mic quality starting at ~7 minutes is too much to make the rest of the video worth watching. It's short enough the content could probably be recorded again.
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Where did the 27.5 come from if your dividing 12000 by 30.24? Which equals 396. 🧐
Ok never-mind I see where it comes from…. I think. So, we are using the sensible heat equation (Btu/h=1.1xCFMxTD) rearranged the solve for TD. So, TD=Btu/(1.1xCFM). 12,000/1.1x400=27.27*F…. Right?
@@mackenziegray2090 30 lbs / min needs to be multiplied by 60 min. / hour so it can work with 12000 btu / hour. This is why they need to show the units so we can follow along.
Great catch! He left out a number in the video. 12,000=(30 x 60 x .24) so 12,000/432 = 27.78 and then 27.78 x .75 (average SHR) = the magic 20 degree TD
You have to figure out what your sensible heat ratio is, there is an equation you can do figure that out. Jim didn’t mention that
@@HVACS Where did th "0.24"come from?¿ Can you explain that pls?¿
@@jose.cervera The specific heat of air is 0.24 BTU/Lb. of air.
Thanks all of you to share great knowledge with easier and simple way.
So today i got the answered why 20* is rule of thumb, before it's scratches my head.
If our scfm is change or flow issues,so delta t will be change.
Thanks Bryan and Adam. I was there when this was recorded, if you have the opportunity to attend a class at MeasureQuick, take advantage of it. Spending time with Jim and Joe, oh and waffles (can’t leave him out) is something I highly recommend.
Great video
Thank you very Much for your Video !!!
🥵🥶
Great video!
Fahrenheit ….
Is the ΔT in Fahrenheit the same as a ΔT in Celsius/Kelvin?
A change is gonna come
The mic quality starting at ~7 minutes is too much to make the rest of the video worth watching. It's short enough the content could probably be recorded again.
Lmao what. Use headphones. Didn’t have an issue understanding
Not seeing where this information is useful
It’s useful if he told you everything you needed to know…..