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Page 16 IFEU Heidelberg, Öko-Institut, IVE, RMCON Payload capacity for selected vehicles and vessels In the expert mode, a particular vehicle and vessel size class and type may be chosen. For land-based transports those size classes are based on commonly used vehicles. For air transport the payload capacity depends on type of chosen aircraft. For marine vessels the size classes were chosen according to common definitions for bulk carriers (e.g. Handysize). For a better understanding, container vessels were also labelled e.g. “like handysize” (~ = like). The following table shows key figures for empty weight, payload and TEU capacity of different vessel types in EcoTransIT World. For marine vessels it lists the vessel types and classes as well as the range of empty weight, maximum DWT and container capacities of those classes. The emission factors were developed by building weighted averages from the list of individual sample vessels. Inland vessel emission factors were built by aggregating the size ships typically found on rivers of class IV to VI. Table 8 Empty weight and payload capacity of selected transport vessels Vehicle/ vessel Vehicle/vessel type Empty weight [tonnes] Payload capacity [tonnes] TEU capcity [TEU] Max. total weight [tonnes] Truck 24-40 gross tonnes 14 26 2 40 (44) 12-24 gross tonnes 10 12 1 24 7.5-12 tonnes 6 6 - 12
IFEU Heidelberg, Öko-Institut, IVE, RMCON Page 17 3.2.2 Definition of capacity utilisation In EcoTransIT World the capacity utilisation is defined as the ratio between freight mass transported (including empty trips) and payload capacity. Elements of the definition are: Abbr. Definition/Formula Unit M Mass of freight [net tonne] CP Payload capacity [tonne] LFNC Load Factor: mass of weight / payload capacity [net tonnes/tonne capacity]; LFNC = M / CP [%] ET Empty trip factor: Additional distance the vehicle/vessel runs empty related to [km empty/km loaded], [%] loaded distance allocated to the transport. ET = Distance empty / Distance loaded With these definitions capacity utilisation can be expressed with the following formula: Abbr Definition/Formula Unit CUNC Capacity utilisation = Load factor / (1 + empty trip factor) [%] CUNC = LFNC / (1+ET) Capacity utilisation for trains For railway transport the load factor in the given definition is often no figure which is statistically available. Normally railway companies report net tonne kilometre and gross tonne kilometre. Thus the ratio between net tonne kilometre and gross tonne kilometre is the key figure for the capacity utilisation of trains. In EcoTransIT World capacity utilisation is needed as input. For energy and emission calculation capacity utilisation is transformed to net-grossrelation according the following rules: Abbr. Definition Unit EW Empty weight of wagon [tonne] CP Payload capacity [tonnes] CUNC Capacity utilisation [%] Abbr. CUNG Formula Net-gross relation = capacity utilisation / (capacity utilisation + empty wagon weight / mass capacity wagon). CUNG = CUNC/(CUNC + EW/CP) [net tonnes/gross tonne] In EcotransIT World empty wagon weight and payload capacity of rail wagons are defined (see chapter 3.2.1), thus the formula for the transformation of capacity utilisation into netgross-relation is: Abr Formula Unit CUNG CUNG = CUNC/(CUNC + 23/61) [net tonnes/gross tonne] EcoTransIT World: Methodology and Data – July 15 th , 2010
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