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Re: Thermodynamics B/C Build

Posted: September 7th, 2018, 8:01 pm
by TheChiScientist
So what type of thermometers do you guys use for maximum accuracy? (I go digital)

Re: Thermodynamics B/C Build

Posted: September 7th, 2018, 8:42 pm
by UTF-8 U+6211 U+662F
TheChiScientist wrote:So what type of thermometers do you guys use for maximum accuracy? (I go digital)
I.. just use alcohol thermometers. Sure, they're not too accurate but hey they pretty much work.

Re: Thermodynamics B/C Build

Posted: September 16th, 2018, 8:27 am
by Jacobi
What kind of model do you use to predict temperature? I used a simple exponential model, but it was hard to correct for the specific heat of the device.

Any and all help appreciated.

Re: Thermodynamics B/C Build

Posted: September 16th, 2018, 8:35 am
by TheChiScientist
Jacobi wrote:What kind of model do you use to predict temperature? I used a simple exponential model, but it was hard to correct for the specific heat of the device.

Any and all help appreciated.
Is your exponential model based on a line of best fit or one data set only? I would recommend sticking to one data set as it is less time consuming and the use simple exponential model. That should make work easier... Not sure what else could be done but it did help me get 1st place at the ISO state tournament. :D Feel free to ask questions as I am happy to help. (Shame I ain't doing thermo this year...) :cry:

Re: Thermodynamics B/C Build

Posted: September 16th, 2018, 8:38 am
by Jacobi
TheChiScientist wrote:
Jacobi wrote:What kind of model do you use to predict temperature? I used a simple exponential model, but it was hard to correct for the specific heat of the device.

Any and all help appreciated.
Is your exponential model based on a line of best fit or one data set only? I would recommend sticking to one data set as it is less time consuming and the use simple exponential model. That should make work easier... Not sure what else could be done but it did help me get 1st place at the ISO state tournament. :D Feel free to ask questions as I am happy to help. (Shame I ain't doing thermo this year...) :cry:
We did lots of data sets on various runs.

Re: Thermodynamics B/C Build

Posted: September 16th, 2018, 8:45 am
by TheChiScientist
Jacobi wrote:
TheChiScientist wrote:
Jacobi wrote:What kind of model do you use to predict temperature? I used a simple exponential model, but it was hard to correct for the specific heat of the device.

Any and all help appreciated.
Is your exponential model based on a line of best fit or one data set only? I would recommend sticking to one data set as it is less time consuming and the use simple exponential model. That should make work easier... Not sure what else could be done but it did help me get 1st place at the ISO state tournament. :D Feel free to ask questions as I am happy to help. (Shame I ain't doing thermo this year...) :cry:
We did lots of data sets on various runs.
Hum. Ok then given that what you're doing is fine because it would help reduce error unless your standard deviation is too high...

Re: Thermodynamics B/C Build

Posted: September 17th, 2018, 8:24 am
by JoeyC
Jacobi wrote:
TheChiScientist wrote:
Jacobi wrote:What kind of model do you use to predict temperature? I used a simple exponential model, but it was hard to correct for the specific heat of the device.

Any and all help appreciated.
Is your exponential model based on a line of best fit or one data set only? I would recommend sticking to one data set as it is less time consuming and the use simple exponential model. That should make work easier... Not sure what else could be done but it did help me get 1st place at the ISO state tournament. :D Feel free to ask questions as I am happy to help. (Shame I ain't doing thermo this year...) :cry:
We did lots of data sets on various runs.
You should be fine. I personally use logarithmic because I think it makes more sense, but as long as you can predict a temperature with it, it should be fine; given the amount of mishaps that can occur when running, there is no 100% accurate (in practical terms) graph.

Re: Thermodynamics B/C Build

Posted: September 24th, 2018, 9:21 am
by DarkSparklyUnicorn
TheChiScientist wrote:So what type of thermometers do you guys use for maximum accuracy? (I go digital)
Since I'm a foodie, I have my trusty thermapen to use. It's fast, accurate, but also pretty expensive. Best food thermometer I've ever used.

Re: Thermodynamics B/C Build

Posted: September 29th, 2018, 9:41 am
by WhatScience?
Obviously, a common design in Div B is the box in a box design. I'm wondering if any of y'all have had success with that in Div C with the 15cm rule. What thickness of wood do you recommend for the boxes? Or if not what, what other material.

Thermodynamics B/C Build

Posted: September 29th, 2018, 12:23 pm
by someone1580
Just a quick question...


Are we allowed to use FOAMULAR? I believe it's made by the same company that makes fiberglass.