How much Tonage I need

[qest233]

I have a 22x16x13 high room with 4in. insulated panels, how do I figure out , how big of a system do I need to put in , in order to maintain 28F or -2C in the room ????

[Brian_UK]

Ask a refrigeration specialist to give you a quote for it.

[cadwaladr]

meters,inches ,yards ,feet furlongs,heat gain,product in temperature give us a clue,the chrystal ball broke lol

[qest233]

meters,inches ,yards ,feet furlongs,heat gain,product in temperature  give us a clue,the chrystal ball broke lol 

Room size is in feet, product in at 34F, heat gain? whatever evaporator fans generate.

Ask a refrigeration specialist to give you a quote for it. 

The ones I know are nothing but a bunch of crooks, I need to do my homework before I start getting quotes.

[nike123]

The ones I know are nothing but a bunch of crooks, I need to do my homework before I start getting quotes.

Then learn about product load, air infiltration, heat gain thru walls, floor, roof, ambient temperature, heat of respiration, pull down time, etc.. which is relevant for calculation.

[qest233]

meters,inches ,yards ,feet furlongs,heat gain,product in temperature  give us a clue,the chrystal ball broke lol 

Room size is in feet, product in at 34F, heat gain? whatever evaporator fans generate.

Ask a refrigeration specialist to give you a quote for it. 

The ones I know are nothing but a bunch of crooks, I need to do my homework before I start getting quotes.

[ref717]

You need to know first your design conditions and calculations of heat loads (wall/ceiling/floor loads, air change load, miscelanneous loads like motors,lights,etc. and the most important the Product load.) As an estimate you can add all these loads and I suggest you use the BTU/hr unit and multiply a safety load factor of 1.15.

[Billy Ray]

come on chaps! give the man a rest! he's looking for help.

let me makle a guess 7.5kW....ishhhhhh

or somewhere in the region off.

Billy Ray

[Zpoint]

Qest233,

O.K., you want to know the tonnage required in order to keep your contractor honest?

If I may offer some advice, focus your efforts on finding a reputable contractor and let them focus on the requirements of your walk-in.

It sounds like you've had problems with all the "crooks" you have dealt with in the past.

Negotiate a contract, back off and let them do the work, (without you looking over their shoulder),
inspect job upon completion, pay the man.

" I am not a crook!"

Jeff P.

[nike123]

come on chaps! give the man a rest! he's looking for help.

let me makle a guess 7.5kW....ishhhhhh

or somewhere in the region off.

Billy Ray

Come on chap, what if pull down time is 2 hours?
Is it then still be in region of 7,5kW....ishhhhh?
Sorry if I sound rude but, I think that such prediction like your is just that what makes him to beleive that there are to many crooks in this business area.

[dougheret0]

Learn all about HVAC design by downloading for free my book HVAC Design Manual – A Mechanical Designer’s Guide to Design of Small Commercial and Institutional HVAC Systems at www.nettally.com/doughert

[sachin230]

For your requirement visit the site daikinindia.com on line solution plasa

[sachin230]

Due to some rule of this forum, previously I am not able to send you web link. please find

http://www.daikinindia.com/onlinesolutions_plaza.asp

[nike123]

Due to some rule of this forum, previously I am not able to send you web link. please find

http://www.daikinindia.com/onlinesolutions_plaza.asp

How this link helps in calculating cold room required refrigeration capacity.

[nike123]

Learn all about HVAC design by downloading for free my book HVAC Design Manual – A Mechanical Designer’s Guide to Design of Small Commercial and Institutional HVAC Systems at www.nettally.com/doughert

Hi Dug! From what I read in your book, it seems that your book doesn't deal with cold room design.

[ref717]

I believe you nike123, their references are basically for Airconditioning systems only. Refrigeration cold room design is a different scenario.