|dc.description.abstract||This thesis has been carried out in cooperation with Solvang ASA, as a part of Energy Management in Practice 2 (EMIP-2). EMIP?s vision is to enable a robust knowledge and innovation platform related to energy efficiency on ships, with rational utilization of limited resources and a strong focus on verification of practical energy efficiency measures, contributing to increasing Norwegian shipping's competitive edge and environmental performance.
This study focuses on the operation and operation costs of the ship equipment powered by electricity generated by the generators. Solvang operates 16 LPG carriers, where the fuel consumption of the generators, powering the ship equipment, often represents more than 15% of the total fuel consumption for the vessels. In this thesis a model to establish and review the operation and operation costs have been proposed. The model is based on the running hours for the equipment (currently only used for maintenance planning), the power ratings and specifications of the equipment and the specific fuel consumption of the generators.
Comparing the registered fuel consumption of the generators to the estimated theoretical fuel consumption of all ship equipment, an average accuracy of 99.2%, ranging from an average deviation of -0.8% to 2.7%, was found for the vessels using the model proposed in the report.
The data gathered was used to further analyze three types of equipment being heavy consumers and showing potential for improvement. Potential savings ranging from 20,000 USD to excess of 80,000 USD per year per vessel were found. The total minimum savings for the nine vessels for the equipment investigated were estimated to 473,000 USD on average, ranging from a minimum of 291,000 USD to nearly 700,000 USD maximum per year.
On the 1st of January 2013 the Ship Energy Efficiency Management Plan (SEEMP) for vessels over 400 gross ton (GT) was enforced by the International Maritime Organization (IMO). The SEEMP is a regulation intended to improve the energy efficiency of a ship in a cost-effective manner, where every vessel is required to have a document or manual containing operational measures to improve efficiency. The model proposed to determine operation and operation costs is highly relevant in the work to establish a high quality SEEMP, as the following parameters are provided:
? Data of the operation and operation costs for the equipment
? A platform to identify equipment that is run efficient or inefficient
? A tool to monitor the measures implemented in the SEEMP.
The data gathered for the ship equipment on the nine vessels in this report are used to establish a Ship Equipment Cost Overview and Performance Report (SECOPR). The SECOPR is intended to be used by onshore employees for evaluation, validation and comparison of ship equipment operation. In addition, the report is intended to be issued to the crew for feedback, making them able to track their operational performance.
In addition, the SECOPR is intended to complement the SEEMP and to be used as a monitoring tool. For owners that do not have software or systems that can monitor SEEMP measures, IMO has proposed using the Energy Efficiency Operational Indicator (EEOI). The EEOI quantifies the energy efficiency in terms of actual CO2 emissions per unit of transport work as it is influenced by the operational features of the ship. The EEOI is useful to determine the overall operational efficiency of the vessel, but is not best suited for monitoring specific measures carried out on ship equipment.
The model proposed and the SECOPR requires an extensive amount of data and the possibility of automatizing this process by use of Kongsberg?s Ship@Web system has been reviewed.
All the nine vessels analyzed in this report are anonymous.||