Economical analysis of vessels’ shore power usage

doi:10.12006/j.issn.1673-1719.2021.237

Abstract

Abstract:

A mathematical model was constructed to analyze the economy of vessels’ shore power usage. In this model, a number of factors relevant to government policy, vessel operation, and port operation were considered. Additionally, both equivalent annual cost analysis and scenario analysis were employed. Based on this model, a case study was finished by taking a typical container vessel operated between Europe ports and Shanghai Port (particularly Yangshan phase III terminal). The results show that if all else under the reference scenario is held constant and no subsidy is provided, the cost of using shore power by vessels would definitely be higher than that of using auxiliary power, regardless of whether environmental protection tax (EPT) is levied. Then shipping companies would face uneconomical situation when they use shore power in this case. To make the use of shore power is economical, the vessel’s residual life should not be shorter than five years, or the subsidy standard should be higher than or equal to CNY 0.55 per kW∙h. To meet same requirement, the increase of EPT rate should not be lower than 458% of the assumed rate if only EPT is levied without subsidy, or the utilization rate of shore power should be bigger than or equal to 39%, or the supply time of shore power should be longer than or equal to 11.8 hours. However, it is almost impossible for shipping companies to use shore power if the charging standard of shore power is greater than or equal to CNY 1.73 per kW∙h, or the fuel consumption intensity is below 158.70 g/(kW∙h), or the price of compliant fuel oil is lower than CNY 2841 per t.

Key words: Shore power, Economical analysis, Subsidy, Environmental protection tax, Scenario analysis

TAO Xue-Zong, WANG Qian-Yi, LI Han-Qing. Economical analysis of vessels’ shore power usage[J]. Climate Change Research, 2022, 18(4): 492-502.

Figures/Tables 8

Table 1 Determination of main parameter values for the model

Table 2 Specification of assumed scenarios

Table 3 The electricity cost of the vessel at berth under different scenarios

Fig. 1 The trends of economical indicator of shore power under different scenarios

Fig. 2 The impact of vessel’s residual life on the economical indicator of shore power (a) and the latest installation of shore power system on ship (b)

Fig. 3 The impact of policy factors on the economical indicator of shore power. (a) Subsidy of using cost, (b) subsidy rate of installing cost, (c) rate of environmental protection tax, and (d) emission factors of compliant fuel

Fig. 4 The impact of non-policy factors on the economical indicator of shore power. (a) Installing cost of shore power, (b) utilization rate of shore power, (c) fuel consumption rate, and (d) fuel price

Fig. 5 The impact of non-policy factors of port on the economical indicator of shore power. (a) Toll standard, (b) emission factors, (c) supply time, and (d) operation time of shore power

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