Here's a "simpler" equation:
t = (X*H^.1.33)/release rate^(.33)
Unfortunately, X is something fairly complex...
That said (and I'll likely do the math for someone's benefit), it looks like the response time is under 1 second...
Here's a "simpler" equation:
t = (X*H^.1.33)/release rate^(.33)
Unfortunately, X is something fairly complex...
That said (and I'll likely do the math for someone's benefit), it looks like the response time is under 1 second...
Milke
t = (X*H^.1.33)/release rate^(.33)
X=4.6*10^-4*Y^2+2.7*10^-15*Y^6
where Y = DeltaT(given)*H^5/3/release rate^2/3
(Hey, you firefighters donna messaroun', you know dat?)
• The Heat Release Rate 250 BTU/s.
• The inside temperature is 75 degrees F
• The detector alarm temperature is 135 degrees F.
• The ceiling height in the living room is 10 ft
• The heat detector is located on the living room ceiling, approximately 2 ft. from the centerline of the fire.
• The Response Time Index (RTI) of the heat detector is 100.
• The fire can be assumed to be Steady State.
Okay: I think the release rate conversion: 1 BTU/second equals 1.0542 kilowatt; 250 BTUs = 264kw
Required temp rise = 135 - 75 = 60 degrees
Y = 60*10ft^(5/3)/264kw^(2/3) = 67.7
X=4.6*10^-4*Y^2+2.7*10^-15*Y^6
X= 2.1
t = (X*H^.1.33)/release rate^(.33)
t = ~7 seconds
*whew*
"Math is Hard"; "Let's go shopping!"
If'n y'all believe my calcs, I'd like ta think the first guy to verify and cut/paste would be a lucky feller!
"We're at NOW now... everything that's hapening now... is happening NOW!"
~ Col. Sanders ~
"I guess all we need to do now is give a shit what you think. I'll work on that."
~ ashauler ~
A... troll? I dinna say, e.g., "Obama is the greatest President evah!" Nor even "Don't you know cigars'll KILL YA?" You know... classic trolls.
As suggested by the OP: "Show your work." In other words, how, exactly, am I trolling?
Edit:
But, since the OP himself objects, I guess I'll move along.
(Oh: OP: I wazna tryin' to show how smaht *I* am, but how tuff it mus' be to pass the fireman's exam...)
Sorry to bust in on your party. Friendly site y'all got here...
Last edited by dajones; 01-06-2010 at 10:31 AM. Reason: update
Hey Buzz..
You may want to edit the contest... we need to factor in a 5,000 BTU Flaming Asshat into the equation!
"We're at NOW now... everything that's hapening now... is happening NOW!"
~ Col. Sanders ~
"I guess all we need to do now is give a shit what you think. I'll work on that."
~ ashauler ~
Look man, right after I said to show your work (which you paid attention to) I said you had to have at least 50 posts (which you are ignoring) - that is not appreciated at all.
That would be appreciated.
Yeah sure, that is exactly what you were doing.
This site is very friendly to those who contribute positively to it.
-Buzz
You aren't being called a troll for WHAT you said, but because you came in and participated in a contest that you clearly did not qualify for. When prompted about the number of posts needed to play, you posted your guesses anyway...even when you knew you were not qualified to do so.
That is why your are being considered a troll.
Now, go away!!
*YAWN*
You're not even funny. At least you're succeeding in getting the youngsters all worked up. Maybe you'll type something that makes me laugh soon, well, at least more than the BOTL and PUFF admissions did.
Dude, seriously - what the hell are you thinking? This contest is meant to be a fun thing for the contributing members of this site. There are rules listed at the top for a reason. Your attempt to show how smart you are is not appreciated, nor is the disrespect that you have shown me and this forum.
Go away.
-Buzz
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