High volume water heating

[bcraig]

Can someone please tell me, what would be the cheapest method of heating 36oC water to 45oC at the rate of 80 Litres per minute for 15 minutes and then maintaining this temperature for an hour? All to be repeated every hour.

I will have multiple 1200 Litre baths that will fill within 15 minutes then drain after an hour session.
The baths will bet set to be either 36, 40 or 45 degrees but the majority will be 36 degrees. A 10,000L storage tank will maintain 36 degrees with a heat pump. So the majority of the bath refills will simply use the stored, 36 degree water. But I need to top up the temperature for the two other temperature settings.
Solar is not an option.

 

[chris watkins]

Yes you can physically maintain water at 36 degrees. But, if you don't want to give the occupants legionella, you will need to store it above 60 degrees.

So how do they do it in a swimming pool, hot tub or in this case a spar ?

 

[gasmanrob]

You ever bathed in a swimming pool?

 

[bcraig]

Lol why would this be a wind up?
Ozone and chlorine will manage legionella. You all act like spa baths don't exist..
Thank you for your suggestion of Andrews water heaters. I am looking through their massive selection of units.
All I was after was an insight into what people consider would be the most efficient method to achieve a temperature rise in the required time.
If it helps then let's say the water is stored at 60 degrees. Do you have any experience or educated advice towards a specific method/unit/combination of units for heating this water by a further 9 degrees at a rate of 80L/min.

 

[lame plumber]

I just cant imagine taking a nice hot spa bath and breathing in all the chlorine as it evaporated off into my lungs, I woldnt go back for a second try

 

[Chalked]

The op knows it all!

 

[bcraig]

I just cant imagine taking a nice hot spa bath and breathing in all the chlorine as it evaporated off into my lungs, I woldnt go back for a second try

Most spa baths use chlorine and the ones that don't will use other chemicals that smell worse. There's never enough chlorine to really notice or at least irritate the user. I will also be using ozone to reduce the volume of chlorine needed which is more cost effective.

 

[Dotty]

Lol why would this be a wind up?
Ozone and chlorine will manage legionella. You all act like spa baths don't exist..
Thank you for your suggestion of Andrews water heaters. I am looking through their massive selection of units.
All I was after was an insight into what people consider would be the most efficient method to achieve a temperature rise in the required time.
If it helps then let's say the water is stored at 60 degrees. Do you have any experience or educated advice towards a specific method/unit/combination of units for heating this water by a further 9 degrees at a rate of 80L/min.

Yes. Quite a lot.

But rather than try and guess at a solution for you you'd best be getting a suitably qualified consultant in to design this properly for you.

Doing a job like this on the cheap never ends well.

 

[bcraig]

See this link regarding HotSpring Spa's water care...
hotspring.co.nz/spa-buying-guide

 

[Dotty]

That's new Zealand. Doesn't count or even come into the equation in the UK.

 

[Dotty]

Actually. I've just checked your ip.

Why are you asking a UK forum? Don't you trust kiwi plumbers?

 

[bcraig]

Yes. Quite a lot.

But rather than try and guess at a solution for you you'd best be getting a suitably qualified consultant in to design this properly for you.

Doing a job like this on the cheap never ends well.

I will most defiantly approach professionals when I decided to build this project and I'm not looking to build this on the cheap. I am trying to do as much research about potential setups for the best efficiency so I can educate myself and have a better idea of the ROUGH running costs to heat water in my hypothetical setup. When I eventually call on an engineer and begin to hand over my money I would like to be able to understand my options and the current technologies available.

Ignore everthhing else you may imagine. Just focus on the simple need to increase a mass of flowing water by 9 degrees at a rate of 80L/min. Do you know of a specific unit type that would be the most efficient to do this?, that you know of.

 

[bcraig]

Actually. I've just checked your ip.

Why are you asking a UK forum? Don't you trust kiwi plumbers?

Wow I am beginning to think I should report you for trolling me. NZ doesn't haven't a forum to the scale of this one. I need a water heater.. It will be very likely that it will be sourced internationally..

 

[Dotty]

It's called moderation pal. When something doesn't look right I look into it.

Report away. It only goes to me.....

 

[bcraig]

Can you then please remove yourself from this thread. You're not contributing in any positive way at all.

 

[Best]

Can you then please remove yourself from this thread. You're not contributing in any positive way at all.

:behead: Death sentence. But I did enjoy your posts!

 

[Dotty]

Nope. I'll be removing you.

You failed to read the forum rules and abide by them. Plus you're on a wind up.

 

[PlumbBobBob]

i see he gave himself a death sentence lol

 

[Dotty]

Plank.

 

[Dotty]

Not you Steve! Lol

 

[Best]

Think he has gone down under! :grin:

 

[Riley]

Hooray we haven't had a good banning for a while

 

[Chalked]

Saw that one coming.
:ack2:

 

[Gray0689]

Can you then please remove yourself from this thread. You're not contributing in any positive way at all.

Neither are you

Get a consultant in he/she will give you all the info you require

Ps your attitude won't make you a lot of friends on here

 

[hammers4spanner]

Only a slightly different note reference swimming pools/spa's water samples are taken every hour in public baths to monitor state of water from dirt to more serious contaminants.

 

[Dotty]

He was probably making a large sheep dip to keep his lovers clean. ...