Plate heat exchanger and Indirect Cylinder

[redapple]

Hi I was wondering if I might be able to get some help. I currently have a gravity system and a indirect Cylinder. I noticed that their is for sale unvented indirect cylinders with heat exchangers attached to increase recovery . mcdonald-engineers powerflow cylinders. I would convert to a unvented system but need to upgrade street mains and it would cost me nearly £2000-3000. which in the current climate is not possible for maybe at a later date. I wondering if it possible to attached a plate heat exchanger to a vented indirect cyclinder to increase recovery time. I came up with a design. Not sure if its right. any advice would be much appreciated.



http://i48.tinypic.com/2cgc2sn.jpg - for large picture

 

[ecowarm]

You really need to get a professional in mate

 

[mountainman]

Good advice from Ecowarm IMO.

 

[redapple]

You really need to get a professional in mate

thanks will do or will probably get one of those Fast recovery cylinders.

 

[mountainman]

Now, that's a good and safe solution.

 

[redapple]

Now, that's a good and safe solution.

Any chance you recommend a cylinder for a shower 12l/min 400mm Rose head. for 3 people. Boiler 30kw ?

thank you

 

[mountainman]

Have a look at indirect high recovery cylinders. There are quite a few on the market.

 

[redapple]

Have a look at indirect high recovery cylinders. There are quite a few on the market.

thanks, i was looking at albion superduty High recovery 250L? is this too big or too small to meet my demands. thank you for the help. current tank is about 110l and running out too quickly and taking too long to recover

 

[mountainman]

The theory is simple but the practice is less so.

Only you know what your hot water demand is and you may find a small HR cylinder perfectly adequate for one shower used several times in quick succession. Also the smaller the storage capacity the more cost effective the installation and running costs would be.

If you have more than one shower and a house full of teenage daughters you may need to go for a bigger capacity cylinder and low flow aerated shower heads.
Remember that buying fresh and disposing of waste water is getting really expensive nowadays.