.... at typical combi flow rates?

I've seen this mentioned somewhere but damned if I can find it.
Just trying to get a ball-park figure for rads feedable from each size.
TIA

We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember "fred"  saying something
like:

>.... at typical combi flow rates?
>
>I've seen this mentioned somewhere but damned if I can find it.
>Just trying to get a ball-park figure for rads feedable from each size.
>TIA

Approximations:
22mm  24kW
15mm  12kW
10mm   6kW
-- 
Dave
GS850x2 XS650 SE6a

"It's a moron working with power tools.
 How much more suspenseful can you get?"
 - House

"Grimly Curmudgeon"  wrote in message 
news:g8i0vd$ck0$1@registered.motzarella.org...
> We were somewhere around Barstow, on the edge of the desert, when the
> drugs began to take hold. I remember "fred"  saying something
> like:
>
>>.... at typical combi flow rates?
>>
>>I've seen this mentioned somewhere but damned if I can find it.
>>Just trying to get a ball-park figure for rads feedable from each size.
>>TIA
>
> Approximations:
> 22mm  24kW
> 15mm  12kW
> 10mm   6kW
> -- 
> Dave
> GS850x2 XS650 SE6a
>
> "It's a moron working with power tools.
> How much more suspenseful can you get?"
> - House

Many thanks.

>
> Approximations:
> 22mm  24kW
> 15mm  12kW
> 10mm   6kW
> -- 
> Dave

Strange!!!, in the admittedly very old tables I have, it says:

For a flow velocity not exceeding 0.75 m/sec (recommended for domestic)
22mm  7.6kW
15mm  3.07kW
10mm    no figures.

For a flow velocity not exceeding 1m/sec (recommended for industrial)
22mm  14.65kW
15mm   4.7kW
10mm    no figures

These carrying capacities are calculated on a temperature drop of 11deg C in 
the system.

The figures are so far apart from the previous contributor there must be an 
error somewhere.

Don

"Donwill" <popple @diddle .dot> wrote in message 
news:48ad2d93$1_1@mk-nntp-2.news.uk.tiscali.com...
>
>>
>> Approximations:
>> 22mm  24kW
>> 15mm  12kW
>> 10mm   6kW
>> -- 
>> Dave
>
> Strange!!!, in the admittedly very old tables I have, it says:
>
> For a flow velocity not exceeding 0.75 m/sec (recommended for domestic)
> 22mm  7.6kW
> 15mm  3.07kW
> 10mm    no figures.
>
> For a flow velocity not exceeding 1m/sec (recommended for industrial)
> 22mm  14.65kW
> 15mm   4.7kW
> 10mm    no figures
>
> These carrying capacities are calculated on a temperature drop of 11deg C 
> in the system.
>
> The figures are so far apart from the previous contributor there must be 
> an error somewhere.

11 deg C drop.. condensing boilers need a bigger drop so the water has to 
give out more heat.

We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember "Donwill" <popple @diddle .dot>
saying something like:

>> Approximations:
>> 22mm  24kW
>> 15mm  12kW
>> 10mm   6kW
>> -- 
>> Dave
>
>Strange!!!, in the admittedly very old tables I have, it says:

Crap! Sorry, brainfart. That above should read

28mm  24kW
22mm  12kW
15mm   6kW
10mm   3kW

Used as a quick and dirty rule of thumb I've found this to be good
enough for general purposes.
It tallies much better with your figures (and no, I'm not just
correcting them to look better).

>For a flow velocity not exceeding 1m/sec (recommended for industrial)
>22mm  14.65kW
>15mm   4.7kW
>10mm    no figures
-- 
Dave
GS850x2 XS650 SE6a

"It's a moron working with power tools.
 How much more suspenseful can you get?"
 - House

In article <48ad2d93$1_1@mk-nntp-2.news.uk.tiscali.com>,
   Donwill <popple @diddle .dot> wrote:
> Strange!!!, in the admittedly very old tables I have, it says:

> For a flow velocity not exceeding 0.75 m/sec (recommended for domestic)
> 22mm  7.6kW
> 15mm  3.07kW
> 10mm    no figures.

Interesting; my new 28kW system boiler has 22mm outlets. Either it's
pushing the water round rather fast or it's not going to work when it's
cold.

-- 
*I just got lost in thought. It was unfamiliar territory*

    Dave Plowman        dave@davenoise.co.uk           London SW
                  To e-mail, change noise into sound.