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Re: Re:Re: (erielack) Feedwater heaters [was New Photos on Websi
Thanks for the info, RB, on the Coffin feedwater heater. Do you know exactly how the Coffin type extracted the heat from the exhaust steam? I think that some brands used a coiled pipe that was just above the blast pipe. The cold water was fed through this coil, and the steam and exhaust gasses from the blast pipe went in the middle and perhaps around the outsides of the coil. The cold water inside the coil absorbed the heat. Was the Coffin similar in design? Is there a good resource that describes the different feedwater heater designs?
T
- -------------------------------------------------------------------------------------------------------
- ----- Original Message -----
From: Janet & Randy Brown <jananran_@_mymailstation.com>
Date: Thursday, August 3, 2006 6:01 pm
Subject: Re:Re: (erielack) Feedwater heaters [was New Photos on Websi
> Most Coffin heaters were in the form of a bent box to conform to
> the shape of the boiler. They could be mounted externally, on the
> front of the smokebox (B&M Berkshires) or internally, within the
> smokebox (some NYC Hudsons)>
>
> All heaters worked basically the same: they took water from the
> tender, heated it with boiler steam, and pumped it into the boiler
> already hot, to increase the efficiency of the steam-making
> process. Sinc they had to overcome the pressure within the boiler,
> they were very sturdy affairs.
>
> Randy Brown
> --------------------------------------------------------------
> Coffin made feedwater heaters also, a weird horseshoe-shaped tube
> that was mounted in front of the smoke box, not sure how this
> device worked.
>
> T
>
>
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