I am designing a approx. 20000 sq. ft. building that will be served by 8 roof top units (RTUs) in ASHRAE climate Zone 6. The RTUs have not been selected yet.
Let us look at one RTU. This typical roof top unit might serve 4 closed offices, and 2 boardrooms.
In the shoulder seasons (Spring...
Hi,
I am designing a new 20 000 sq. ft single storey building with different roof slopes and an inner courtyard. We are going to use multiple roof-top units. Nothing too complicated from a load calc. point of view. For this reason, I want to use this project to use HAP for the first time.
I...
Hi,
I am currently working on my first chilled water plant design. For the condenser water circuit we are intending to use base-mounted centrifugal pumps. We are considering using suction guide on our pumps. I know that a centrifugal pump needs approx. 5 diameters of piping before pump inlet...
Hi,
I would like to know what is the threshold value at which the service and emergency generators typically have a pre-lube pumps.
By the way, I am typically involved with land-based units under 60 kW. We do not have such pre-lube pumps.
Thank you
Hi,
We have asked to have some pins fabricated using AISI 1018 steel. The machine shop is asking us if they can use AISI 1022 instead. I know the mechanical properties are actually better but more brittle due to slightly higher carbon content. But is there a chance of galvanic corrosion if...
Hi,
There seems to be many methods of continuously monitoring an aboveground double-wall tanks for leaks. We were thinking of using a Veeder-Root TLS 350 for both piping and the tanks.
These are a couple of 10 000 liters tanks feeding a power generator that is running continuously.
The...
Hi,
I was asked to research Codes, Regulations and Guidelines that are dealing with Flight Deck and Helicopter Hangar Fire Protection requirements. We have an old Transport Canada standard and there is also a IMO Resolution A.855 (20). But there is very little direction provided by these...
Hi,
So far, all the studies looking at the emissions improvements of biodiesel over petrodiesel seem to be skewed in that they do not consider the potential need to re-tune engine timing to account for different cetane number of these respective fuels.
Have the members of this Community ever...
Hi,
I work for the Canadian Government. Recently the Storage Tank Systems for Petroleum Products and Allied Petroleum Products Regulations were enacted. One of the requirements is to have a secondary containment system for both the tank and piping. While for the tank part it is easy, it is...
Hello all,
Recently the agencie I work for had to remediate a site due to diesel oil spillage. This spillage was due to the cracking of a diaphragm of a positive disp. pump. The pump was located on an unmanned remote site.
Is there any guidelines, codes or regulations available out there...
