Abstract
Shore power can be used to effectively reduce air pollutant emission of vessels at ports when the vessels are docked at the berth. However, at present, due to investment income imbalance, enthusiasm for the construction of port and vessel enterprises and to utilize shore power is low, which causes that use proportion for shore power is low. Economy for shore power is one of the most important factors to affect the construction proportion and use of shore power. In the Paper, the influence of service charge, power price and maintenance cost of shore power on shore power economy were systematically analyzed, and investment and income of shore power were analyzed and compared. Economic indexes for payback period etc. were calculated and analyzed, and relation and influence for related factors of shore power economy were deeply analyzed. Finally, related suggestions for promoting shore power use of vessels are docked at berth were proposed from the perspective of economy.
Highlights
Shore power use while vessels are docked at berth is to replace auxiliary diesel engines on vessels with onshore power supply to power up electrical equipment for vessels during the berthing period of vessels
Economy for vessels connected to shore power includes two aspects, investment and income, of which investment mainly includes equipment investment and later maintenance cost input; income mainly includes saved expenses compared with using shore power and auxiliary engines and financial incentives from the government, of which saved expenses compared with utilizing shore power and auxiliary engines are related to service charge of shore power charged by ports and power price
Apart from power price based on the amount of use, it is needed to pay the basic power price according to transformer capacity or the maximum demand, which causes that current auxiliary engine electricity generation cost for vessels is lower than power supply cost for shore power at port
Summary
Shore power use while vessels are docked at berth is to replace auxiliary diesel engines on vessels with onshore power supply to power up electrical equipment for vessels during the berthing period of vessels. Economy for shore power includes two aspects, investment and income, of which investment mainly includes equipment investment and later maintenance cost input; income mainly includes service charge for shore power and subsidiary awards granted by government. Economy for vessels connected to shore power includes two aspects, investment and income, of which investment mainly includes equipment investment and later maintenance cost input; income mainly includes saved expenses compared with using shore power and auxiliary engines and financial incentives from the government, of which saved expenses compared with utilizing shore power and auxiliary engines are related to service charge of shore power charged by ports and power price. Apart from power price based on the amount of use, it is needed to pay the basic power price according to transformer capacity or the maximum demand, which causes that current auxiliary engine electricity generation cost for vessels is lower than power supply cost for shore power at port. Related suggestions for promoting shore power use while vessels are docked at berth were proposed from the perspective of economy
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