Results 1 to 16 of 16
  1. #1
    Join Date
    Dec 2008
    Location
    China
    Posts
    87
    Rep Power
    16

    How to write make a study of a HVAC component?



    Hello! Hope you guys can help me solve this problem.
    Here is the question:
    Our company is using a kind of filter drier,but it's too expensive, we wanna replace them by another brand. How to make a feasibility report? What kind of things should I consider? Pressure drop? Seal? Under which pressure will it explode? Any other things?

    In VAVE, there should some ways to replace the present accessory of a refrigerant system, especially in a big company? Can any guys tell me?

    Thanks a million? Sincerely waiting your reply!



  2. #2
    Join Date
    Sep 2007
    Location
    Split Croatia
    Age
    57
    Posts
    6,175
    Blog Entries
    6
    Rep Power
    36

    Re: How to write make a study of a HVAC component?


    Too expensive, you say!
    How cheap do you want it to be?
    If that cheap could destroy really expensive compressor, do you still going to think that previous "too expensive" is still too expensive?

    Sorry, I don't know anything about feasibility, but I know something about bad link in chain.

  3. #3
    Join Date
    Dec 2008
    Location
    China
    Posts
    87
    Rep Power
    16

    Re: How to write make a study of a HVAC component?

    Quote Originally Posted by nike123 View Post

    Too expensive, you say!
    How cheap do you want it to be?
    If that cheap could destroy really expensive compressor, do you still going to think that previous "too expensive" is still too expensive?

    Sorry, I don't know anything about feasibility, but I know something about bad link in chain.
    __________________
    Changing the band of a accessory is quite normal.Sometimes it's not just the money problem. There are some other reasons.

    Just as you mentioned, I know compressor is very expensive, so I need to make a deep study to make sure this replacement is feasible and will not affect the present system?

    Anyway thanks for your reply!

  4. #4
    Brian_UK's Avatar
    Brian_UK is offline Moderator I am starting to push the Mods: of RE Site Moderator : and general nice guy
    Join Date
    Mar 2001
    Location
    Dorset
    Age
    76
    Posts
    11,192
    Rep Power
    60

    Re: How to write make a study of a HVAC component?

    If you use a reputable manufacturer then there should not be any problems.

    If you are unsure of your present supplier then stop using them and transfer to a better company with a good quality history.
    Brian - Newton Abbot, Devon, UK
    Retired March 2015

  5. #5
    Join Date
    Dec 2008
    Location
    China
    Posts
    87
    Rep Power
    16

    Re: How to write make a study of a HVAC component?

    Quote Originally Posted by Brian_UK View Post
    If you use a reputable manufacturer then there should not be any problems.

    If you are unsure of your present supplier then stop using them and transfer to a better company with a good quality history.
    _______________________

    Thank you,Brian!

    It's true that a good company will do his job on the product, but as an air-conditioner manufacturer, we also need to do our job to evaluate the product.

    If some works in a big company and doing R&D job, he will know much about this.

    It's all about VAVE or project mangagement.

  6. #6
    Join Date
    Oct 2006
    Location
    England
    Posts
    1,847
    Rep Power
    21

    Re: How to write make a study of a HVAC component?

    Quote Originally Posted by wilsoncheung View Post
    Hello! Hope you guys can help me solve this problem.
    Here is the question:
    Our company is using a kind of filter drier,but it's too expensive, we wanna replace them by another brand. How to make a feasibility report? What kind of things should I consider? Pressure drop? Seal? Under which pressure will it explode? Any other things?

    In VAVE, there should some ways to replace the present accessory of a refrigerant system, especially in a big company? Can any guys tell me?

    Thanks a million? Sincerely waiting your reply!

    Companies producing components will provide specification data that is required for their product.
    Get intouch with different producers of simmilar products and compare their data.

    Then if you wanted to you could run a sample product on test and evaluate its performance and see if it compares with your original.

    taz.

  7. #7
    Brian_UK's Avatar
    Brian_UK is offline Moderator I am starting to push the Mods: of RE Site Moderator : and general nice guy
    Join Date
    Mar 2001
    Location
    Dorset
    Age
    76
    Posts
    11,192
    Rep Power
    60

    Re: How to write make a study of a HVAC component?

    If you are using VAVE then what are the results telling you about the products that you have tested?
    Brian - Newton Abbot, Devon, UK
    Retired March 2015

  8. #8
    Join Date
    Jan 2009
    Location
    Canada
    Posts
    8
    Rep Power
    0

    Re: How to write make a study of a HVAC component?

    Quote Originally Posted by wilsoncheung View Post
    Hello! Hope you guys can help me solve this problem.
    Here is the question:
    Our company is using a kind of filter drier,but it's too expensive, we wanna replace them by another brand. How to make a feasibility report? What kind of things should I consider? Pressure drop? Seal? Under which pressure will it explode? Any other things?

    In VAVE, there should some ways to replace the present accessory of a refrigerant system, especially in a big company? Can any guys tell me?

    Thanks a million? Sincerely waiting your reply!
    Hi, I supose you already know the size of the drier in capacity and the connection type (sweat/Flare), though do you need to consider the type of Filter drier?
    Different types of Driers function to do different jobs. There are such types as;
    Molecular Sieve-----Water
    Silica gel-----Water/Wax
    Activated Charcoal-----Acid
    Activated Alumina -----Water/Acid

    I'm a bit foggy on this but if I'm wrong I'm sure someone in the collective will correct me, hope this helps.....

  9. #9
    Join Date
    Dec 2008
    Location
    China
    Posts
    87
    Rep Power
    16

    Re: How to write make a study of a HVAC component?

    Quote Originally Posted by taz24 View Post
    Companies producing components will provide specification data that is required for their product.
    Get intouch with different producers of simmilar products and compare their data.

    Then if you wanted to you could run a sample product on test and evaluate its performance and see if it compares with your original.

    taz.
    _______________________
    Thanks, Taz!
    It's true that the companies will give me all kinds of specification data, but as air-conditioner manufacturer, I still need to check out whether their data is corect.

    I will also compare different producers about their products.

    And still I will ask them for a sample and test. That's what I have been doing.

    Now I just wanna know if there is a better way of doing this. I want methodology.That's what I was talking VAVE-Value analysis and Value Engineering. It's quite popular all over the world.

    When you are carrying out "cost down" project, it may include change a brand of a component, but how you evaluate the potential components?

    Any guys that know about VAVE.

  10. #10
    Join Date
    Dec 2008
    Location
    China
    Posts
    87
    Rep Power
    16

    Re: How to write make a study of a HVAC component?

    Quote Originally Posted by Brian_UK View Post
    If you are using VAVE then what are the results telling you about the products that you have tested?
    __________________________
    Hey, Brian! It's nice that you look back this question.
    I know little about VAVE, I've just started to read some books on VAVE. It seems that you know VAVE, would u pls tell me something about it?
    Thanks!
    Wilson

  11. #11
    Join Date
    Jan 2007
    Location
    UK
    Posts
    24
    Rep Power
    0

    Re: How to write make a study of a HVAC component?

    Value engineering usually starts at how long you want the component and product to last. Then each component is analysed to last for at least that time limit. The component manufacture, all the way through to the finished product manufacturer will have an internal document specifying the minimum time spans. The materials are then tested and reduced to find the failure time limit. So the starting point is to compare specifications and then ask the component manufacturer the anticipated life span of the component and then test.
    This saves a penny here, a penny there, and then multiply by a few thousand components and hey presto a reduced price unit.
    This then opens the question which manufacture has valued engineered? Another poll?

  12. #12
    Join Date
    Oct 2007
    Location
    india
    Age
    50
    Posts
    16
    Rep Power
    0

    Re: How to write make a study of a HVAC component?

    Hi Dear members,

    plz guide me that how to calculate the capacity of filter drier to installed in a commercial application of refrigeration system.
    plz

  13. #13
    Brian_UK's Avatar
    Brian_UK is offline Moderator I am starting to push the Mods: of RE Site Moderator : and general nice guy
    Join Date
    Mar 2001
    Location
    Dorset
    Age
    76
    Posts
    11,192
    Rep Power
    60

    Re: How to write make a study of a HVAC component?

    Quote Originally Posted by wilsoncheung View Post
    __________________________
    Hey, Brian! It's nice that you look back this question.
    I know little about VAVE, I've just started to read some books on VAVE. It seems that you know VAVE, would u pls tell me something about it?
    Thanks!
    Wilson
    I'm sorry, I misunderstood - I thought that you were already using the VAVE system in house -oops
    Brian - Newton Abbot, Devon, UK
    Retired March 2015

  14. #14
    Brian_UK's Avatar
    Brian_UK is offline Moderator I am starting to push the Mods: of RE Site Moderator : and general nice guy
    Join Date
    Mar 2001
    Location
    Dorset
    Age
    76
    Posts
    11,192
    Rep Power
    60

    Re: How to write make a study of a HVAC component?

    Quote Originally Posted by mehtag View Post
    Hi Dear members,

    plz guide me that how to calculate the capacity of filter drier to installed in a commercial application of refrigeration system.
    plz
    The sizing is based on the capacity of the system.

    See here for some examples....
    http://www.sporlan.net/product.asp?i...n_i=110&type=s

    Please in future start your own topic thread and do not hijack someone else's.
    Brian - Newton Abbot, Devon, UK
    Retired March 2015

  15. #15
    Join Date
    Dec 2008
    Location
    China
    Posts
    87
    Rep Power
    16

    Re: How to write make a study of a HVAC component?

    Quote Originally Posted by l'robot View Post
    Value engineering usually starts at how long you want the component and product to last. Then each component is analysed to last for at least that time limit. The component manufacture, all the way through to the finished product manufacturer will have an internal document specifying the minimum time spans. The materials are then tested and reduced to find the failure time limit. So the starting point is to compare specifications and then ask the component manufacturer the anticipated life span of the component and then test.
    This saves a penny here, a penny there, and then multiply by a few thousand components and hey presto a reduced price unit.
    This then opens the question which manufacture has valued engineered? Another poll?
    覧覧覧覧覧覧覧覧覧覧覧覧覧覧裕hanks,l'robot!
    I wonder if you are doing VAVE. If you do,would tell me more about VAVE. What you said may just be one part of VAVE. It's not all the thing. Or would you introduce some books?
    Thanks again!
    Wilson

  16. #16
    Join Date
    Dec 2008
    Location
    Australia
    Age
    61
    Posts
    44
    Rep Power
    0

    Re: How to write make a study of a HVAC component?

    VAVE what a crock these days most manufacturers offer five year warranty (on small domestic splits , refrigerators etc.) and after that the system becomes disposable.I could see the sense in VAVE being used by commercial manufacturers, as for methodology seems right compare manufacturers test results, check for reputable test laboratories. discard the ones that don't meet your specifications then compare pricing on the remaining products

Similar Threads

  1. Leak Testing?
    By Thana in forum Trouble Shooting
    Replies: 36
    Last Post: 31-08-2010, 02:57 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •