Hi,
I'm in the process of updating my control sequences to include dynamic demand controlled ventilation.
I'm wondering if anyone has experience with "people counters"? Not occupancy sensors, but devices that actually count people going into or out of a space. I'm looking for a counter that...
I would think HAP would be acceptable for calculating loads at any place on the planet, if you can define the design conditions. After all, load calcs are mostly just a mass and energy balance calculation based on design conditions and envelope parameters.
What about HAP makes it unfit for...
Thanks for the replies. Yes, these restrooms will be fully conditioned.
One reason for I'm tossing the the wheel around is that this will be a ground coupled water source heat pump job, and every bit of energy recovery saves me well field. Obviously wheels are a bit more efficient than plates...
I'm considering using a total energy wheel in a system which will serve an interstate reststop bathroom and state tourism facility. (~3500 cfm of vent. air)
I'm worried about odor carryover and wanted to solicite opinions for using a total energy wheel in this application. It would be awful for...
AF2,
RSMeans is updated every year with factors for project location and most of the variables are accounted for in the yearly realease. It's worth the $99 to get the book because, with a little study and work you can get the ballpark estimate you need from the publication.
GB
I'm looking for help and guidance for selecting air separators for use in hydronic systems both chilled and hot water.
If you take a look at your Bell and Gossett catalog there are several different types if air separators for which to choose. Using B&G nomenclature these include: Rolairtrol...
You could also add a high efficiency condensing gas furnace and a fossil fuel kit to cut out the HP at low temperatures and use gas heat. This option would obviously have to be examined in light of local gas and electricity rates vs first cost to determine if it's a viable option for decent payback.
Try these tools from McQuay: http://www.mcquay.com/eprise/main/mcquaycom/designsolutions/designtools/MQC_designtools
I try and size return ductwork at .05/100ft and 500-700 fpm at the air device inlet as a general rule. Your milage may vary, of course
Here is a link to an online calculator:
http://www.connel.com/freeware/psychart.shtml
Or like Mint* pointed out, Chapter 6 2001 ASHRAE Fundamentals. If you go this route don't expect an easy answer! Most engineering libraries have a copy, and my local public library also has one...
Very first thing: I would identify the method of water entry to the basement and correct this issue. Obviously, it's impossible to dehumidify with an active source of water entry. If it's a leaky basement, waterproof the space as best possible. If it's infiltration, seal the holes in the...
Hello all, (sorry so long of a post)
I'd like to solicit opinions and ideas on how to organize our vast, unorganized, and undocumented detail "library" into something I can use and find stuff quickly.
--Background:
I'm working to try and develop an organizational system to identify and locate...
In the same boat. I found this tutorial (http://www.ider.herts.ac.uk/cad/tutorial1.html).
I'd love to hear about other migration users and how they learned the tools...
I use Carrier's HAP (Hourly Analysis) for modeling, load determination, and system analysis: http://www.eere.energy.gov/buildings/tools_directory/software/hap.htm
As for duct design, I find doing it manually is the best for my by way of the HAP data and a good 'ol ductulator.
Good Luck!
Try: www.bellgossett.com
You will have to register with them to gain access to their "TEH Manuals" but there is everyting you need to get started. As I am new to the HVAC field also they have helped me understand the process and to ask the right follow on questions that come up in practice...
James,
If you own a HP48GX you already own the best calculator in the world, IMHO of course. A chair got sat on the display of my 48 and broke it so I tried the TI-89. Wrong move for me. Being so use to the HP spoiled me on RPN and the stack also, the TI's just can't cut it for me for...
I have a complex sketch in a part that I'd like to use in other parts. I remember in prior versions of Pro, of being able to save sketches out to disk and then reuse them in another part. Could someone help me out with trying to perform this operation in 2001??
For example, I scketch out...
Could anyone provide some direction to obtaining decent reference material in regards to vibration testing and fixture design. I realize that much of this type of knowledge is somewhat "tribal" or specific to the particular type of testing being done, but any info would be...
Would any kind soul wish to recommend to a new mechanical engineer decent reference material for understanding the art of welding and how to specify welding on drawings. I have a copy of Machinery's Handbook already. Some specific info that I would like easy access to is:<br>
<br>
1. What weld...
