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Type: Posts; User: WAYNE3298

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  1. Replies
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    You have the right place R600a. I couldn't find...

    You have the right place R600a. I couldn't find photos of the engine generators on what you posted but I didn't find a lot on my own either. One thing that was interesting about this facility that...
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    I didn't post pictures because wasn't sure there...

    I didn't post pictures because wasn't sure there would be any interest. In this facility if the technology existed and was needed it was included. The painting cost $7,000,000 and was done two times.
  3. The two main causes of this problem are excessive...

    The two main causes of this problem are excessive negative pressure and high velocity across the coil.
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    Library of Congress Historic Record

    The first job I did a lot of design on is included in the library of congress historic engineering record. It is the Perimeter Acquisition Radar Power Plant (PARPP). There are photos but I couldn't...
  5. Check the air velocity across the cooling coil.

    Check the air velocity across the cooling coil.
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    No matter the job DO YOUR RESEARCH. By doing the...

    No matter the job DO YOUR RESEARCH. By doing the leg work you not only learn but start knowing the question you need to ask and who can most likely answer them. You can't expect to be handed an...
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    Orifice sizes for any purpose are calculated by...

    Orifice sizes for any purpose are calculated by the orifice manufacturer. It is a fairly long process and they do it but you can check their sizing if you get the factors from them that only they...
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    Nobody likes to be wrong or make mistakes. Where...

    Nobody likes to be wrong or make mistakes. Where ego is destructive is when you refuse to admit you are wrong no matter the cost to anyone. Engineers are the worst offenders of that in my experience....
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    Ego is kind of a sensitive subject to me because...

    Ego is kind of a sensitive subject to me because a bosses ego got me fired from my engineering job. I haven't shared this with many because there was no reason to do so. In 1969 I started my job as a...
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    Scoobie ego has nothing to do with not being able...

    Scoobie ego has nothing to do with not being able to do your job because someone else didn't do theirs. TAB has no choice but to make a punch list if the HVAC can't be balanced to within that...
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    A famous great boxer once said "IT AIN'T BRAGGING...

    A famous great boxer once said "IT AIN'T BRAGGING IF YOU CAN DO IT". I say it ain't whining if you can prove it. I never made an accusation without proving it.
    When the TAB guy has a problem it's...
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    I agree this type of thing can be frustrating....

    I agree this type of thing can be frustrating. TAB is frustrating also because everyone knows more about how it should be done from the design engineer to the installer. Informing everyone in writing...
  13. Thread: Test.

    by WAYNE3298
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    This is a great site. I'm a retired me with not...

    This is a great site. I'm a retired me with not much to contribute but these guys have tolerated me and actually made me feel welcome. No matter your problems if even remotely related to HVAC you...
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    A democrat!!

    A democrat!!
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    I have never seen a powered flow hood and didn't...

    I have never seen a powered flow hood and didn't know there was such a thing. It will be interesting to see if anyone here has used one.
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    szw21 By powered I assume you mean digital. If so...

    szw21 By powered I assume you mean digital. If so in this situation they are worse. One of my competitors read a railroad signal house airflow with a digital hood and the controls overheated when...
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    Your post Artrose demonstrates my point about low...

    Your post Artrose demonstrates my point about low pressure systems especially when read with digital flow hoods. High airflows in a low pressure system will make you pull out your hair. You can't...
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    The diffuser design airflows exceeded the hood...

    The diffuser design airflows exceeded the hood capacity. They tried to read half the diffuser at a time. That was bad enough but they had to cut a cardboard and install it on the hood to fit the hood...
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    I respect your opinion Artrose. I suggested the...

    I respect your opinion Artrose. I suggested the incline because there is no calibration expense and because they are not as easily fooled as any other gage. When doing a traverse the biggest...
  20. Thread: The future

    by WAYNE3298
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    1,134

    HVAC test and balance is fun except you are...

    HVAC test and balance is fun except you are constantly telling others their part of the job sucks. You have to tell that to everyone from time to time from the engineer to the owner and everyone in...
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    I had an advantage when I got into TAB because I...

    I had an advantage when I got into TAB because I did design for 25 years, mostly water and steam. Because of that I have books up the rear. If you join NEBB they have a lot of info that is useful but...
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    Having a flow hood is a good idea. You need to...

    Having a flow hood is a good idea. You need to learn how to use it because for some applications they are useless. For your use the old analog hood would be best. Digital hoods have more problems...
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    I'm not up to date on this stuff. You can find...

    I'm not up to date on this stuff. You can find the required K factors but may have to get them from the control contractor rather than the control program. I would tell the control contractor that if...
  24. Thread: The future

    by WAYNE3298
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    Teach him that his education is his tool box....

    Teach him that his education is his tool box. Your tool box allows you to do your job but doesn't make you high and mighty. I have known several engineers that didn't understand that and none of them...
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    Ammoniadog that reminds me of a new chiller...

    Ammoniadog that reminds me of a new chiller installation that the owner didn't think was doing design cooling of the water. I knew the chiller guys boss very well because I mentored him during his...
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    I don't know exactly where he is going with this...

    I don't know exactly where he is going with this but I do know he thinks the critical race theory is racist. He thinks it urges us to hate each other. I think he wants to point out using humor to...
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    Critical Superiority Theory

    My brother has come up with the idea of creating a critical superiority theory. It starts with the premise that some people are basically stupid and can't be reasoned with. I think his idea is...
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    Call the chiller plant engineer. The best way to...

    Call the chiller plant engineer. The best way to control the water is variable speed pumps with the chilled water flow controlled by the load and the condenser water flow controlled by the chiller...
  29. It gets better with age adam75 because you forget...

    It gets better with age adam75 because you forget what you forgot.
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    Plug fans are used in industrial applications and...

    Plug fans are used in industrial applications and can handle a wide variety of conditions. My old Greenheck sizing program indicates they can move from 600 CFM to 70,000 CFM at up to 8 inches static...
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    In small systems short radius ells don't matter a...

    In small systems short radius ells don't matter a great deal. I like what BBeerme did because it looks great and reduces the probability of leaks. In commercial hydraulic systems and steam the use of...
  32. In a case like this I didn't know whether to be...

    In a case like this I didn't know whether to be glad I hadn't forgot or pissed that I wasted my time going back.
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    Long radius elbows have less pressure drop and...

    Long radius elbows have less pressure drop and are preferred for that reason. Short radius can be used where necessary.
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    The explanation of this gets pretty long and to...

    The explanation of this gets pretty long and to be perfectly honest my memory is no longer good enough. Try the HVAC School site I think you will like it. I'm not trying to avoid your question just...
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    You guys are too smart on this thread and I'm...

    You guys are too smart on this thread and I'm always impressed here. I would love to witness when some wise ass engineer trying to bullshit you guys.
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    This motor when wired 208 operates as single...

    This motor when wired 208 operates as single phase because only two legs are connected without a neutral and it therefore runs less efficient on 208 than 230 single phase. It also produces less...
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    In my opinion you strive for perfection but be...

    In my opinion you strive for perfection but be big enough to fully recognize your short comings. Just because you did it doesn't mean it has to be right. Do the job with the confidence it is right...
  38. In commercial the last time I looked it was 15...

    In commercial the last time I looked it was 15 CFM per person unless you had windows that would open then it was 7.5 CFM per person. That was some time ago.
  39. Google will answer your question.

    Google will answer your question.
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    I just found out this project is part of the...

    I just found out this project is part of the national engineering historic ******. Don't remember the full name. This was my first design assignment.
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    Per post #12 the first thing you need to do is...

    Per post #12 the first thing you need to do is get the specified control sequence and thoroughly understand the entire intent. We could probably guess pretty close but that isn't good enough. If all...
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    Relieving air when not economizing is a complete...

    Relieving air when not economizing is a complete waste of energy. If that is necessary for air quality you should and almost certainly would have an ERV to recover as much of the energy as possible....
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    Too much of the drawing is unreadable for me to...

    Too much of the drawing is unreadable for me to tell what they are trying to do. It looks like a large supply grid at the bottom. They really don't show any diffusers. Looks like a trick question to...
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    When the return fan CFM is specified less than...

    When the return fan CFM is specified less than the supply fan CFM by the amount of the outside air required the return fan's job (in non econ mode) is to reduce the negative static created by the...
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    In your case in post #5 the engineer probably...

    In your case in post #5 the engineer probably didn't word the spec right. One thing to remember is buildings that are occupied with live people have to have fresh air which has to be drawn in or in...
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    The setup and configuration can be a challenge...

    The setup and configuration can be a challenge for a TAB guy. After a while you get a feel for how to start the setup which helps. Most designs have little or no consideration of how the TAB is going...
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    Welcome aboard Justin you will love this site....

    Welcome aboard Justin you will love this site. The answer to your question is yes the return fan should be delivering 8605 within the specified balance tolerance (normally +/- 10%). If properly set...
  48. Talk to York about controlling tower water flow...

    Talk to York about controlling tower water flow using condensing head pressure that results in maximum efficiency. This should show the energy that can be saved and lead to possible changes in the...
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    I have a home made one. It consists of a 3/8"...

    I have a home made one. It consists of a 3/8" cross with pipe on one outlet that has a quick connect for a gage, vent valve on another and two ball valves for inlet pressure.
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    Ashcroft sells them. They make great gages as...

    Ashcroft sells them. They make great gages as well.
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