Results 51 to 64 of 64
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19-07-2008, 02:38 AM #51
Re: How to Design Refrigeration Systems
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19-07-2008, 02:40 AM #52
Re: How to Design Refrigeration Systems
Sorry posted twice.
Last edited by GXMPLX; 19-07-2008 at 02:42 AM. Reason: Repeated post
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19-07-2008, 04:32 AM #53
Re: How to Design Refrigeration Systems
I would say your temperature ranges are reasonably valid. Those are as good as anything I might suggest.
If all else fails, ask for help.
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19-07-2008, 05:14 AM #54
Re: How to Design Refrigeration Systems
Do you ever check your visitor messages?
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19-07-2008, 02:53 PM #55
Re: How to Design Refrigeration Systems
Thank you for explenation of tons.
it is interesting for me.
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23-07-2008, 08:46 AM #56
Re: How to Design Refrigeration Systems
Hi everyone, and thanks in advance, for the first time in my life I will work in transformer oil cooling system. I don’t know how to select perfect capacity and right machineries. The transformers capacity is 9250 KVA made by Tamini with seven ton of oil in each unit and they are used in iron alloys company. Oil temperature is now reaching 85ºc , it should drop 20ºc to stay in 65ºc. ambient temperature is 50ºc Jubail (Saudi Arabia)
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23-07-2008, 12:09 PM #57
Re: How to Design Refrigeration Systems
how to design air handling unit?
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23-07-2008, 12:11 PM #58
Re: How to Design Refrigeration Systems
how tod esign the air handling unit
How to do the base frame,filter frame calculations,how to calculate coil size area
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23-07-2008, 02:49 PM #59
Re: How to Design Refrigeration Systems
Interesting problem you should try a new post.
All the ideas I can think of maybe are not new to you.
- First check it has its full charge of oil and the right kind of oil.
- It should be kept clean of dust at least from the heat exchanger HE.
- Protect it from the sun. Protect the supporting metal structure with a highly reflective paint.
- If there is no wind you could try installing a sun powered fan (crazy he?)
- If there is wind check the temperature you could be getting hotter than ambient air if it is heated by near structures. In this case you need to protect it from hot air or enhance the HE surface. If you get no prevailing wind you still get air from local convective currents if they are hot you need to cut them for example installing metal sheets on the ground to break the current air pattern.
- If the ambient air temp is ok you might have an overloaded transformer or not the right HE for the conditios and this should be checked with the manufacturer.
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24-07-2008, 02:58 PM #60
Re: How to Design Refrigeration Systems
If I wanted to design my own evaporator for 0F deg, where do I start from? How do I select the tube length, diameter, and fins?
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24-07-2008, 03:15 PM #61
Re: How to Design Refrigeration Systems
I would start by reading one of the many books that come with EES!
You can read a good list in the reference section of this paper:
http://www.me.gatech.edu/energy/susan/papers/HEFAT.pdf
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24-07-2008, 04:14 PM #62
Re: How to Design Refrigeration Systems
hi how do desine -60 refrigeration
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24-07-2008, 04:21 PM #63
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24-07-2008, 04:27 PM #64
Re: How to Design Refrigeration Systems
[hi how to de sign -30c to -60c
[/quote]
cooler
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