Hot Tub Forum

Original => Hot Tub Forum => Topic started by: drb on June 05, 2004, 01:55:47 am

Title: Spa heating calculation spreadsheet
Post by: drb on June 05, 2004, 01:55:47 am

OK, so work has been just a hair slow lately... ;)

Anyway, I came up with a spreadsheet that lets you look at the effect of running the motor inside the interstitial space, along with a comparison to a full-foam spa.  You can also turn the motor on and off, so you can see the effect either way.

It's not real straightforward.  Since there's heat going to and from the water, and to and from the cabinet, along with the heat (or not) from the motor, it's just a hair on the awkward side.  But it does work....

It also lets you simulate the effect of a forced air ventilation fan in the cabinet, at variable cfm - one suspects that certain spas (the Name That Cannot Be Mentioned  :o ) use something similar.

If you are fairly geeky and into heat transfer, R-values, and BTUs, I'd be glad to send you a copy for your comments.  You'll need probably Excel 2000 or later.

Let me know.

Title: Re: Spa heating calculation spreadsheet
Post by: Chas on June 05, 2004, 09:08:15 am

I would love to see it.

Proof of geekiness -> 8)

Title: Re: Spa heating calculation spreadsheet
Post by: Starlight on June 05, 2004, 08:31:58 pm

I too would like to see this.

Title: Re: Spa heating calculation spreadsheet
Post by: doodoo on June 08, 2004, 09:19:31 am

As would I.

I'm not a geek but have several working for me and this should be a fun topic to discuss. :P

Title: Re: Spa heating calculation spreadsheet
Post by: Gary on June 08, 2004, 09:46:36 am

Please send me a copy.

Gary

Title: Re: Spa heating calculation spreadsheet
Post by: Julie on June 08, 2004, 09:50:42 am

I would like a copy too, since I'm a geek girl!  Sending my e-mail address over by private message.