Can anyone tell me where I could find information on CO2 pipe sizing? More specifically gaseous CO2? I have a dry ice production facility that is fed liquid CO2 to the ice production. I was able to calculate the GPM of this based on the mass flow rate requirement on the machines and the...
Can anyone tell me what the industry standard is for a piping material for these fluids. All of the piping will be filed painted so I immediately thought schedule 40 black steel. However, the chassis grease pump is a Fire Ball 300 (50:1 ratio) model 226013. The manufacturers specifications...
I received a call from a school district we do quite a bit of work at about replacing their existing pumps within their bus yard. The pumps are dated and are in need of replacement. I've never done design/permit drawings for something like this but I am sure our firm is capable of this. This...
Hello everyone,
After working in the HVAC industry the last 14 years after graduating with BSME I'm am thinking of pursuing the PE. The first hurdle however will be the FE. In all honesty I am extremely nervous and intimidated since school was always a struggle for me and I haven't opened a...
Guys,
I have a client that operates a large condominium complex and he is getting complaints about marijuana odors migrating from 1 unit into the adjacent unit. I am in the process of analyzing the air flow and determining if the exhaust system is up to par and exhausting the required rates...
I keep hearing about this and keep getting lost in article after article but is there any new standard people are using? Our approach recently has been to reduce OA and provide bi-polar ionization along with higher MERV filters in the air handling equipment. Seems like increasing OA is going...
For Rheem residential style furnace there is no such thing as breaking the fans back correct? Fan is located at the bottom so air needs to travel through furnace element then DX coil and then into the duct so it should be fairly laminar flow leaving the DX coil at which point I want to 90 after...
Can anyone share they approach for a room of this type. ASHRAE requires 10-15 ACs per hour so I am looking at 600 cfm. I'm thinking 100% OA with all of the Covid concerns but not sure how to handle unoccupied situations. Are ERVs a safe approach without cross contamination to the OA? Do I go...
I have a project where they powder coat in a 12'x10'x8'room. There is only 1 worker and they warm small parts in a oven then dip in the powder that is in a pot and then a 2nd oven bakes the part. It is not a spray booth application. I cannot find anywhere in any ASHRAE literature where they...
I realize 2 fans in series can overcome more static pressure while fans in parallel would increase the flow rate however, what would the final flow rate be for 2 fans in series at different flow rates?
Guys,
I am laying out a radiant floor system for a fleet maintenance garage in a new building. The garage only has 1 exterior wall and roof and minor glass. It is 6200 sq. ft. The room is very well insulated and I am coming up with a calculated heat loss of about 25,000 BTU/HR. This number...
Suppose I have a 1500 gallon tank with 4 piping connections on it. On the left side I have a set of pumps and my chiller. On the right side I have a second set of pumps sending fluid to a process line in the field. I have 2 different flow rates and 2 different temperatures on each side of...
