Hi Everyone.
I am adding a chilled water outside air unit to a exisitng project. This unit will handle around 3500 CFM of outside air. The unit will be equipped with a hot water re-heat coil from the factory so all we need to do is get some hot water to it. The problem is that the only hot...
Hi everyone, im having a little difficulty and was trying to get some help.
I am looking for a relationship between color temperature (kelvin) and wavelength in nanometers. I have seen that there is a relationship called "Wien's Law" basically it is Wavelength (nM)=3,000,000/Temp (K). I have a...
Hi everyone. Im working on a large house in Pakistan. My load calculation program has weather data from just about every place in the world however it doesen't have any data for Pakistan. The closest I can get is somewhere fairly close in India. Can anyone help me out with this? I am looking for...
Hello everyone. I wanted to get some opinions on this. We have a wood working/metal working shop that is part of a much larger building. The total shop area is about 1600 ft^2.
According to NFPA 664 chapter 1, standard 664 only applies to shops over 5,000 ft^2. Does this mean that if the shop...
Realistic hypothetical: Lets say you are designing an office with DX split systems and the load calc comes to:
35,700 sensible btu/h
3,500 latent btu/h
39,200 Total.
This could probably be covered nicely by a nominal 3.5 ton system pretty nicely. Now lets say the cooling cfm required...
Im working on a Jewelry store. Obviously the store part is pretty simple. Im just concerned about the backroom. The Jeweler stores a couple large tanks of oxygen that he uses for making jewelry, and also has a tank of acetylene. Im sure he uses these chemicals to weld, which means they are...
Hello everyone. I am trouble shooting a existing pizza oven that is having problems venting. The oven has no hood, it is just directly vented through a round duct. Anyone have any good resources for this? NFPA 96 and oven manufacturers don't seem to have much to offer. Any literature or rules of...
Hi everyone, working on a Laundromat, first time doing a new one. Each of the dryers exhausts 200CFM of air while running, the only thing is that I have 20 of these things in a 1500 sq ft space. This will equate to 2000 CFM of makeup air without even accounting for ventilation for the space. How...
Im looking for some ideas on what would cause a WSHP compressor to fail pre-maturely & repeatedly. I know the problem could be air flow or water flow, but these systems are actually ductless so I am all but eliminating the possibility of airflow.
Any ideas/references would be helpful.
Does anyone have a suggestion for a salon on what I could use for latent load per station while the hair dryer is running? Im using 1159 BTU/H for sensible heat gain. Thanks Guys
Does anyone have some good literature explaining the benefits of a two way vs a three way valve system for a chilled water application or can someone give me some bullet points?
What would be your thoughts on converting a existing three way valve system to a two way with a vfd running the...
Im replacing a small fan coil unit in a existing building for a exterior zone. I was thinking about using PRICE vav diffusers for some zone control. Ive noticed that on their website they always seem to use a pressure control valve VAV terminal between the supply/return. Would it be possible to...
Have a project with a DX split system, with hot-gas reheat for humidity control. The owner wants to know if a dehumidifier would be OK in lieu of the reheat because the reheat is a huge upgrade. I don't think it would work as well and see several downsides however I wanted to see if anyone here...
Does anyone have a good resource (ie. website or excel file etc) that contains latent & sensible heat gain values for kitchen equipment? Both hooded & non hooded...With a usage factor.
Thanks!
Going to consult on a job tomorrow for a apartment building. The original engineer had designed the apartments with two water heaters, one on the 2nd floor and one on the first. He showed a "typical" detail of a electrical water heater with a expansion tank. So naturally the plumber installed...
If you have the following conditions:
72 degree F drybulb
62% Relative Humidity
If the drybulb was changed to 75 degree F, what would be the new RH%?? I came up with 54-55%.
Thanks!!!!!!
Going to evaluate a newly renovated commercial building. The building has two sides. One half is fine, the other is experiencing elevated humidity somewhere around 60%. I haven't visited the site yet but my gut feeling is that the building is leaky and they probably dont have the thermostat low...
Im doing a senior living facility with 5 washers and 5 dryers. What would you suggest for the sensible/latent load for this room? Basically, does anyone have a good rule of thumb for sensible & latent load per washer/dryer? Should I apply diversity? Thanks
