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sbkvelocity
03-02-2008, 08:08 PM
Hello everyone,
I am an under graduate Mechanical Engineering student, and right now working in a project, for which its required that i will have to assemble all the components of the refrigerator R134a based, since i am very much new to this field, i dont have much practical experience, i need your help in component analysis and component matching. It would be very helpful for me if u can tell me various sites and e-books related to it.In short How to start the assembling of a refrigerator?..Thanks for your Valuable time.

Brian_UK
04-02-2008, 01:55 AM
So you would like us to perform your research for you then ?

sbkvelocity
04-02-2008, 03:29 PM
No not all, i am just asking for your guidance, tips, etc only. I told you I am new to this field,and internet is just one of the medium to start my research work, so I did.

Brian_UK
04-02-2008, 10:33 PM
Fair comment :)

taz24
04-02-2008, 11:36 PM
No not all, i am just asking for your guidance, tips, etc only. I told you I am new to this field,and internet is just one of the medium to start my research work, so I did.


Try this

http://www.danfoss.com/United_Kingdom/BusinessAreas/Refrigeration+and+Air+Conditioning/EducationAndTraining/The+Fridge.htm

http://www.danfoss.com/United_Kingdom/BusinessAreas/Refrigeration+and+Air+Conditioning/EducationAndTraining/The+Fridge.htm

http://www.sciencemuseum.org.uk/objects/domestic_appliances/1971-66.aspx

http://www.mtprog.com/ApprovedBriefingNotes/PDF/MTP_BNC11_2007May2.pdf

taz

sbkvelocity
05-02-2008, 03:52 PM
Thanks a lot for inputs Taz..I am aware of the basics, i just need help in the balancing of the system, that is what type of compressor is suited to what what type condensing unit, dimension of the capillary tube, in short I have to assemble the refrigerator and hence need to have knowledge about balancing of the system.

nike123
05-02-2008, 04:09 PM
I am aware of the basics, i just need help in the balancing of the system, that is what type of compressor is suited to what what type condensing unit, dimension of the capillary tube, in short I have to assemble the refrigerator and hence need to have knowledge about balancing of the system.

Then go there:
http://tinyurl.com/2fv2vq

You have plenty of tools for your needs there, and by studying every tool you should learn more about selection and balancing of refrigeration circuit components.

sbkvelocity
05-02-2008, 07:56 PM
Thanks a lot buddy, u send me just the right information I was looking for...thanks a lot.

jahangir.ahmad
13-02-2008, 01:23 PM
hii
i 'm also working on it
i want to ask a question to u
can this sites help can u read it

jahangir.ahmad
20-02-2008, 02:10 PM
hi MR. india where r u
can u find ans of ur reply me
thanks

makramtufail
23-02-2008, 11:35 AM
Dear Jahangir,

This is danfoss site, you can check out the danfoss official website for these selection and calculating tools.

akram

jahangir.ahmad
17-04-2008, 08:16 AM
HI MR . AKRAM

I 'M VERY HAPPY TO SEE A PAKISTANI IN THIS SITE

IN WHICH COMPANY U R WORKING I'M WORKING IN LAHORE
OK COME TO THE POINT
WHICH SITE HELP FUL TO ME RIGHT IT AGAIN

THANKS

JAHANGIR AHMAD KHAN
ASSISTANT ENGINEER
HAIER PAKISTAN LTD.

jahangir.ahmad
17-04-2008, 09:08 AM
Now Io Want To Calculate The Heat Load In Freezer

If I Put 6 Liters Water In Freezer How Many Btu Required To Make It Ice
Thats My Question
Could The Danfoss Site Help Me Regarding This Problem
Can
Ans Me Fast
I'm Waiting For Reply

SPEACIALY TO MR. JOSIP
Jahangir Ahmad Khan
Lahore Pakistan

nike123
17-04-2008, 11:41 AM
Now Io Want To Calculate The Heat Load In Freezer

If I Put 6 Liters Water In Freezer How Many Btu Required To Make It Ice
Thats My Question
Could The Danfoss Site Help Me Regarding This Problem
Can
Ans Me Fast
I'm Waiting For Reply

SPEACIALY TO MR. JOSIP
Jahangir Ahmad Khan
Lahore Pakistan


For your calculation you need more information.
What is entering temperature of water?
What is desired temperature of Ice.
What is desired time for ice production.
What is heat gain in freezer from surrounding.
What is heat gain in freezer from fan motor and lighting.
What is Ice form
What is air circulation heat gain from opening freezer

jahangir.ahmad
17-04-2008, 12:51 PM
HI NIKE GOOOD AFTER OON

THANKS FOR INTREST



What is entering temperature of water?
Ans= 20c

What is desired temperature of Ice.
Ans= -18c

What is desired time for ice production.

Ans =24/hr

What is heat gain in freezer from surrounding.
ans= i can't understand it explain it details (ambiant temp)(43c)


What is heat gain in freezer from fan motor and lighting.
ans=there is no fan and light in freezer (dircet coolrefrigerator)


What is Ice form
Ans= i can't understand it explain it in details


What is air circulation heat gain from opening freezer
Ans= i can't understand it explain it in details


Thanks and best regards

jahangir ahmad khan
Lahore Pakistan

nike123
17-04-2008, 02:32 PM
What is heat gain in freezer from surrounding.
ans= i can't understand it explain it details (ambiant temp)(43c)

That is calculation of heat ingress from surrounding in freezer at designed ambient and freezer temperature.
Because the freezer is in surrounding that is at higher temperature than his internal temperature and because your insulation is not perfect you must add that heat to total cooling load.
That mean that you need to calculate how much heat is coming from surrounding thru freezer insulation panels at your operating temperature and highest ambient temperature.


What is heat gain in freezer from fan motor and lighting.
ans=there is no fan and light in freezer (dircet coolrefrigerator)

Than you maybe have defrost heater. Again, if any part inside generate heat ,you need to add that to calculation.



What is Ice form
Ans= i can't understand it explain it in details


If you are going to freeze one ice cube, or 100 small cubes, there is no same time for freezing them, because ice is heat insulator, and core of one big Ice cube will freeze slower than core of small cube. Amount of heat load is same for both but time for freezing is not the same.


What is air circulation heat gain from opening freezer
Ans= i can't understand it explain it in details

When you open door of freezer, you allowing some amount of hot air to enter in freezer. That is heat load which evaporator need to extract. Therefore, in your calculation, you need to add that to total load at evaporator.

Do you have any tutor (teacher, older engineer) in your company? :eek:
I ask this, because these questions you should ask him, and he should be able to explain them to you in much easier way and at concrete examples.

Unless, he is deaf, blind, dumb and speaks Hungarian language.:D:D

jahangir.ahmad
24-04-2008, 01:28 PM
mr.IBRAHEEM
i can't take a usefull information from these sites
http://tinyurl.com/2fv2vq like this
i can't understand it
how could i find the btu/hr
i'm confused
help me

speacialy to MR.josip

thanks in advance

jahangir ahmad khan
lahore pakistan

nike123
24-04-2008, 02:36 PM
mr.IBRAHEEM
i can't take a usefull information from these sites
http://tinyurl.com/2fv2vq like this
i can't understand it


This is same on English:
http://tinyurl.com/586gnm

jahangir.ahmad
02-05-2008, 01:54 PM
hi every one
dearest MR. NIKE
in this sites i'm just found the software there is not enough information about how to calculate the btu/hr
can u tell me another site
thanks
i'm waiting for your reply

jahangir ahmad khan
lahore Pakistan

nike123
02-05-2008, 10:54 PM
Dear Jahangir, my impression is that your knowledge about physics and other disciplines needed in this industry is not suitable for tasks you are challenged with.:(
It is obvious that you don't have basic knowledge how to convert one unit system to other unit system and that is something what any engineer need to know when you wake him in middle of night.;)
Today, with help of internet, there is no excuse to some engineer that he could not convert any unit in other unit, no matter of his expertize.
It is just matter of basic engineer knowledge as it is calculation as 2+2=4.:eek::eek:
Don't be dejected by this taught, but I think that you need serious tutoring.

jahangir.ahmad
03-05-2008, 08:38 AM
HI GOOD MORNING MR.NIKE

I'M VERY HAPPY TO SEE YOUR COMMENTS ABOUT

I'M AGREE ABOUT WHAT U SAY

BUT ONE THING REMEMBER IF U NOW THAT HOW TO CALCULATE THE
BTU/hr?

why u don't tell us

i'm now the basic of refrigeration for your kind information if u any no#
(cell no#)to call i 'll ans u on the spot about basic
now guide me how to find the btu/hr

this is my last request to u

please understand my problem except telling me to hair any teacher

thanks for your kindness

jahangir ahmad khan
lahore pakistan

nike123
04-05-2008, 09:36 AM
BUT ONE THING REMEMBER IF U NOW THAT HOW TO CALCULATE THE
BTU/hr?

why u don't tell us


Ok I give you example:2141

jahangir.ahmad
06-05-2008, 01:54 PM
GOOD EVENING

BANDLE OF THANKS FOR U MR.NIKE
YOU ARE SUCH A GREAT TEACHER

I 'VE NO WORDS TO SAY THANKS

THANKS AGAIN

AND BEST REGRADS FOR YOUR WHOLE LIFE

JAHANGIR AHMAD KHAN
LAHORE PAKISTAN