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Grizzly
01-11-2011, 05:22 PM
OK. Guys.
Say we have a Suction Temperature of 4c and a SST of -2c.

Mathematically the answer of 4 and -2 added together is 2

However 4 to -2 is a 6c split.
So which is the answer from a superheat perspective?
Grizzly

mikeref
01-11-2011, 05:43 PM
Grizzly, +4 and -2 =6. As in 0 to +4*c sensible heat, then add the -2 to 0*c as well as it is is also sensible heat.

mbc
01-11-2011, 06:16 PM
+4 -(-2)= +4+2 = +6

Quality
01-11-2011, 06:19 PM
Either point crosses the 0 Datum hence it`s 6 k

james10
01-11-2011, 07:53 PM
Since superheat Is ^t of sst and st then it's 6C

Quality
01-11-2011, 08:18 PM
OK. Guys.
Say we have a Suction Temperature of 4c and a SST of -2c.

Mathematically the answer of 4 and -2 added together is 2

However 4 to -2 is a 6c split.
So which is the answer from a superheat perspective?
Grizzly

I now understand your question and will explain the thoery of the one you will know---- It -4 +2 = -2 so +6 being the dt = 4 sst = +2 which is 6 -4 square which is -2
So the final figure is an dtla figure

brian connolly
01-11-2011, 08:32 PM
sorry lads. just looking to find out how to start a new post

Quality
01-11-2011, 08:38 PM
go to home select forum and then start new thread thats my method

Ps good site you have found here

brian connolly
01-11-2011, 08:40 PM
cheers quality

brian connolly
01-11-2011, 08:44 PM
hey quality, home and forum are beside each other, went in both and cant see anywhere to start new thread

Quality
01-11-2011, 08:51 PM
You need to select a form to post in click the forum and I normaly find the post new thread at the boottom

frank
02-11-2011, 10:22 AM
sorry lads. just looking to find out how to start a new post
Click on the 'FORUM' button at the top
Scroll down until you find the correct section title, i.e. 'Fundamentals'
Open the selected section and the 'New Thread' button is at the top

Sturt
02-11-2011, 10:55 AM
Hey Grizzly
The superheat is 6.
I look at it this way - forget + and - numbers and work as if they are all 1 increments on a rule and count the difference between the two points.
Thats my story anyway.

Grizzly
02-11-2011, 05:55 PM
OK. Guys "Hands Up"!
I already knew the answer, only I watched a chap calculating a superheat value recently and he took the negative value away from the positive.

When I pointed out the correct method (as everyone else on this post!).

I though "what a good topic for the forum"!

Sadly you are all to clever.
Some interesting way of explaining all the same.
Thanks Grizzly