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The capacity calculation formulas for general cargo terminals and bulk liquid terminals are different. 1. For liquid berths, the capacity of a berth is calculated using the formulas specified in Article 7.1.2 of the industry standard \"Design Specifications for Loading and Unloading Processes at Petrochemical Terminals\" (JTS165-8-2007). In these formulas: Pt represents the annual capacity of the terminal berth in tons; αi—When both the ship type and the types of petrochemical products differ, αi represents the percentage of the annual volume of various petrochemical products loaded onto different ships, out of the total annual loading volume at that berth ; Psi—annual throughput capacity of the berth corresponding to αi (t) ; Ty————Number of operating days (days) ; G————Actual loading and unloading capacity of the designed ship type (t); the coefficient is set at 1.0 ; td——number of hours between day and night (24h) ; tz —— Time required to load and unload a ship of the designed type (h) ; tf — the sum of the time for loading/unloading assistance tasks and technical operations on the ship, along with the time required for the ship to dock and depart (in hours) ; tp——Time for an oil tanker to discharge ballast water ; ρ —— Berth utilization factor. 2. Calculation formula for general cargo berths: It is calculated using the relevant formulas in the \"Code for General Plan Design of Seaports\" (JTJ211-99). The formula is as follows: -----(Ⅰ), = -----(Ⅱ), where Pt represents the annual throughput capacity of the berth in tons ; Ty—annual operating days of the berth (d), taken as 309 days ; —Actual cargo capacity of the designed ship hull (t) ; p—efficiency during ship design (t/h) ; KB—Berth imbalance coefficient, taken as 1.3 ; —Time required to load and unload a designed ship type (h) ; —The sum of the auxiliary loading/unloading operations, technical operations, and the time required for the ship to dock and depart (in hours) is set at 7 hours ; —Number of hours per day and night (h), take 24 hours ; —The total non-production time during day and night (hours), including breaks, meal times, and shift handover times, is set at 3 hours ; Who has the methods for calculating the throughput of overseas ports? Could you share them?
They may seem different on the surface, but they’re actually pretty much the same. In practice, the petrochemical industry follows JTS165-8-2007, while other freight terminals follow either the general design specifications for river ports or those for seaports, depending on whether they are river ports or seaports. Standards are all copied from each other; it’s probably the same abroad as well.
Actually, there’s no need to worry too much about this issue; many of the values aren’t fixed in the first place.