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we are hoping to tender a 20 x 20 x 6 m freezer room and we would like to give the client something to contemplate.
So as it's a clean sheet operation we'd like to recommend things like (say)
screw compressors with inverters
floating head
heat recovery for water/underfloor heated by heat recovery
recommended insulation thickness?
etc etc
Anyone got any great ideas we can work on
Multisync
London
Good quality air lock type access, if you have the room for it.
For your own benefit - design it around the need for maintenance.
Quote:
Originally Posted by Brian_UK
Care to expand on the first one and the reasons why?
I suppose 'air lock' may be overkill but thinking of keeping the inside air in and the outside out.
It all helps to maintain conditions and can hold down running costs if you're not losing temperature through the access points.
The design depends of course on whether you need vehicle access or not
Absolutely right.Quote:
Originally Posted by Brian_UK
Sooner or later this will need service.
The air infiltration through the doors can be huge. Anything you can do to limit this might allow you to reduce the total installed refrigeration capacity.
Internal Dehumidifiers work well at keeping down the frost buildup. These a company here in Queensland who are using cascade CO2 systems in large low temp rooms which are high power, low energy and are getting good results. If you want to know more I'll shoot over the contact details.
Would we be able to use a Daikin convipak thingy ?
Dear Scramjetman
Can you post more details on that pl.
Contact me at richard@enviroenergysys.com and I'll forward the info you need.
Okay, been to site -roughly 3500 sq ft of freezer.We now are trying to find out about inverters and electronic valves and controls etc. However this seems slightly out of the range of the std wholesalers
I guess we are after 'supermarket' level of kit and control. So we need suggestions as to where/who we should contact for the whole refrigeration 'pack'
You are getting into an area where a highly specialized factory supplied system is required or one that is custom engineered and built from individual components by someone other than a manufacturer (a contractor perhaps?).Quote:
Originally Posted by multisync
artic circle down hereford,or accross to you :D they were developing there own inverter semi,s a few years ago so i would hope there ready for sale by now,there bussiness in building custom packs ;)but you will be a lucky chap if you can price on what you want to in this climate,best of luck;) ,
Of course price is an issue but as the customer spends 2.5k per month on leccy at just one of the two sites he's shutting, we hope to convince him of the old adage "Cheap to buy -dear to own"
An all singing all dancing may cost him 20%+ more but save 30% on running costs payback in less than 5 years is not out of possibility.
I suspect the supermarket bods should be up on where the market is going. We will shy away from CO2 as we do not have sufficient experience of it and if it goes wrong we would be bankrupted by penalty clauses
i install rooms of this size all the time in supermarkets for ease if i were you i would ask your local climate centre to quote you on 1 of there own built lt scroll packs they come with 4 zf18 scroll compressors and you would probally need 3 ks70 coolers or 2 km95 coolers these can be controlled through simple rdm coldroom panels which are very good they are cheap and reliable and can be configured for electronic or tev valves going for something like this is easy to install very cheap to run and very easy to fix when when it breaks also parts are easy to find.
Talk to Tony Mills at Space engineering. They do scroll packs utilising subcooled liquid, if you choose Danfoss control systems then you can have floating suction and discharge. We use them on Tesco and have proved they save at least 30% energy over a standard scroll pack!
Regards.
Quote:
Originally Posted by Silhouette
Sounds great but he's not going to want to help us out without taking over the job now is he?
We Supply packs to independants!!
great I shall contact them for their thoughts. Someone else mentioned Hubbard.....?Quote:
Originally Posted by coolhibby1875
Mel,Quote:
Originally Posted by Silhouette
Is he in Bristol -or do you have an email addy for him
tony.mills@space-engineering.co.uk he resides at Bristol Templemeads office and is the pack production manager. If you call Space engineering systems main number and ask for Tony Mills they will put you through. 0845 602 0670