Does anyone know how to calculate the output of:

a) Hospital type rads
b) Old style panel rads, (their the ones without fins)

I guess it will be proportional to the area, but apart from that!!!!

Thanks.
jaycee

On 22 Feb 2006 11:48:57 -0800, "jaycee"
wrote:

Does anyone know how to calculate the output of:

a) Hospital type rads
b) Old style panel rads, (their the ones without fins)

I guess it will be proportional to the area, but apart from that!!!!

Thanks.
jaycee


You can only find old data sheets and go from there, scaling as
appropriate

--

..andy

In an earlier contribution to this discussion,
jaycee wrote:

Does anyone know how to calculate the output of:

a) Hospital type rads
b) Old style panel rads, (their the ones without fins)

I guess it will be proportional to the area, but apart from that!!!!

Thanks.
jaycee

I don't know about (a), but I can give some approx figures for (b) - based
on the calculations which I did in the 1960's for my previous house!

At that time, I was using 182 BTU/Hr per square foot, based on a 100 degF
difference between mean radiator temperature and room temperature.

If my calculations are correct, that translates into about 573 watts per M^2
for a delta T of 55 degC - based on the *total* (both sides) area of the
radiator.

On that basis, a radiator measuring 1000 x 600 (total area 1.2 M^2) would
produce about 688 watts - compared with about 1100 watts produced by a
modern finned radiator of the same size.

A delta T of 55 corresponds to flow/return temperatures of 80/70 and a room
temperature of 20. For any other delta T value, the radiator output needs to
be scaled up or down accordingly - slightly non linearly, but linear is ok
for a first approximation.
--
Cheers,
Roger
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