Pro/Forums - View Single Post - can we agree on the basis of "C" in C/W ?

Les · 10-22-2005, 06:58 PM

1) Cannot recall you ever posting wb performance curves using LMTD or my suggestions that it should be changed to Twater.in
(2) For radiators suggested T(water.in) as being preferred to LMT(D)(water) when no T(air out) was measured(link) T(water out) was not being considered as an option at that point in the discussion.
My ultimate preference for system modeling was "Outlet + 2/3 metre of tubing" temperature(link)

For wbs prefer T(water.in) when using the term "C/W"; it easier for system modeling.
When describing the resistance/impedance would suggest using U; where U is the "Overall Heat Transfer Coefficient"
Q=UAdT(MTD)
A=wb/die interface area
dT(MTD)=LMTD= (Two -Twi)/lin((Tdie - Twi)/(Tdie-Two))

Not 100% that dT(MTD)=LMTD(needs checking).

10-22-2005, 06:58 PM	#6
Les Cooling Savant Join Date: Oct 2001 Location: Wigan UK Posts: 929	1) Cannot recall you ever posting wb performance curves using LMTD or my suggestions that it should be changed to Twater.in (2) For radiators suggested T(water.in) as being preferred to LMT(D)(water) when no T(air out) was measured(link) T(water out) was not being considered as an option at that point in the discussion. My ultimate preference for system modeling was "Outlet + 2/3 metre of tubing" temperature(link) For wbs prefer T(water.in) when using the term "C/W"; it easier for system modeling. When describing the resistance/impedance would suggest using U; where U is the "Overall Heat Transfer Coefficient" Q=UAdT(MTD) A=wb/die interface area dT(MTD)=LMTD= (Two -Twi)/lin((Tdie - Twi)/(Tdie-Two)) Not 100% that dT(MTD)=LMTD(needs checking).