What are some good numbers for making some preliminary estimates with regards to bunkers for the following?
Assuming the actual numbers are not known:
Convert DO or MGO metric tons to cubic meters?
Ballpark? 306 gallons per MT for MGO/DO. Obviously it depends on the temperature and density. It’s ballpark… Cubic meter is always 264.2 gallons So… 0.863 MT/m3
Same for conversion for HFO?
HFO varies too much to be accurate but I remember, IFO380 I used to use 275 gallons/MT so that is 0.96 MT/m3. LSFO is obviously lighter and the new VLSFO is like dirty MGO.
What percent would would be consider a tank full while bunkering?
Depends on who your asking and the tank configuration, expansion from > temperature after bunkering if HFO. Above 90% and it’s tough to defend if it’s too much for the tank. I didn’t normally go more than 85% unless I had to.
What is the maximum percent allowable remaining in a tank to avoid mixing issues with HFO? HFO is cracked with different, sometimes non-compatible agents. This can cause separation of cat fines, lubricities or even have a violent reaction to one another. I believe DNV Bunker Master recommends no more that 20% by volume ROB. I never went more than 10% or your cleaning the auto filter regularly.
Also temps - acceptable max / min for HFO?
Impossible to calculate without the BDN. Download DNV Bunker Master. There’s a free version that will do all of this for you.