Hello.
I'm working on providing general ventilation to a pump room. The pumps and motors are below and do not impart any heat to the space. The ventilation I'm providing is just general ventilation. I'm looking to provide 5 ACH per rules of thumb for pump rooms. I'm going to use an intake...
I'm doing an analysis for hydrostatic testing failure modes. I need to know how to estimate the initial velocity of a hose coupling upon failure. I have all the data nessesary of the goemetry of the hose and the pressure at failure.
Thank you.
I'm trying to control humidity in a space using a conventional 5 ton DX split system. The system will have an electric heating coil and a wall mounted thermostat.
My question is, will dehumidification be possible? Do they make a thermostat that has a dehumidification cycle built in?
I have a scenario where the client wants 50% redundancy using 2 constant volume units. This means I have 2 units each sized for 75% of the TOTAL load. My question is what airflow do I use for sizing the duct? There will be a common duct and I will use a horizontal mounted back draft damper on...
I have a space that houses electrical switchgear. I'm planning on specifying a conventional split system to do the job. I'm wondering if I need to bring in OA by way of a duct (this would increase the cost of the total system). Section 401.3 of IMC 2009 states that ventilation is required...
I have a question regarding the temperature rise of a pump and VFD room. I used some software to calculate the heat load of the space. The software gave me this output.
Sensible gain = 28270 btuh
Latent gain = 9980 btuh
Supply Air = 1336 cfm
Coil LAT = 61 F
Now the equipment I specified can...
I have a situation where I have to provide cooling to a bathroom group that is located within a non-cooled warehouse. The heat load on the room will be satisfied with a residential grade packaged wall AC unit. Now, by code I have to provide 200-300 cfm of exhaust. My question is what is the...
Can anyone explain how to account for the pressure drop through a return air plenum above the ceiling? Some say, just add 0.5", but I want to know how it is actually calculated. In this return plenum, there are walls that go to deck, so I will have to put in transfer ducts and rectangular...
Does anyone know what criteria to use to select an air handler for either cooling or dehumidification? I used two design conditions using ASHRAE Fundamentals handbook.
Thanks
I'm trying to draw in AutoCAD a LR 45 elbow in plan view that is rolled to one side at 45 degrees. I need to find out if there are any resources that would explain the geometry or construction sequence associated with drafting such a thing.
I have a room with 20 canopy hoods (10 per branch) mani-folded to a common exhaust fan. The owner is concerned with unnecessary conditioned air leaving the building and is interested in a VFD drive for the exhaust fan. Where would the best location be for a static pressure sensor to be...
I'm designing a ventilation system for an oven room and need to know what is the best way to account for the heat gain into the room from the ovens.
There are 5 ovens that are rated at 47kW and one gas fired at 250,000 btu/hr. I think that using the rated input will yield too much cfm's, so...
