Why is the sentence: “No ‘one size fits all” also applicable in the cargo vessel industry? In this blog we will compare an identical Platform Supply Vessel hull/design over multiple bulk handling systems, being:
- Pressure Tank System
- Sender Tank System
- Re-Loader System
Pressure Tank System / Sender Tank System / Re-Loader System
As a vessel owner you might not be interested to know what type of application will be used for your bulk handling system onboard or don’t even have a preference on the type of system, as long its met the requirements on convey capacity, weight, lead times, etc.
The naval architect will then select a preferred existing hull or design such accordingly based on the owners overall requirements/specs.
As the architect need to incorporate multiple cargo handling systems into one hull, each within its own category, limitations, requirements, specs. etc., there is “No ‘one size fits all” to select from the bulk handling suppliers…and here is why.
For an efficient use of area, we need to have look at the geometry of each system. Based on the footprint it might be interesting to go for a square design instead of a circular design. Or even the diameter of each individual circular design has an impact on the amount of tanks available within the given footprint. Besides the void spaces, during this evaluation also the maintenance area requirements need to be taking into account.
The available height limitations in the hull design need to be set apart for each system.
- Pressure tanks have dome shaped bottoms
- Sender tank systems require a sender tank
- Re-loader system requires extra space for the re-loader tanks, reducing the available area
Based on the given hull design, the 3 example models will be gaged against each other.
By evaluating, fitting, remodelling, resizing each system within the given hull parameters a summary of volumes are followed;
- Sender Tank system in 10 hoppers: 800 m3
- Re-Loader Tank system in 8 hoppers: 775 m3 (approx. -3%)
- Pressure Tank system in 6 tanks: 625 m3 (approx. -22%)
Recommendation to owner/naval architect
Based on the above volume summery where the owner puts a priority on maximum cargo carried onboard, the Sender Tank is then in favour. But once the attention is put on simplicity and not on amount of cargo onboard, it might be that the owner prefers to go forward with a Pressure Tank concept and accepts the cargo losses. Besides these volume and simplicity considerations, there are numerous amount of considerations to take into care, all within line of the vessel requirements, specs and preferences of the owner.
This is just a small example of reflections why there is such “No ‘one size fits all” situation in this type of industry compared to some products in the consumer goods industry.
If you have any questions about bulk handling feasibility studies or other consultancy services, our team will be ready to assist you. Let us know your bulk handling project or logistic challenge at http://www.lionbulkhandling.com/contact/