Shaft Power Limitation (ShaPoLi) is a measure for limiting the propulsion power of ships that is used as part of international efforts to reduce CO₂ emissions and increase the energy efficiency of ships. By limiting the maximum shaft power of the main propulsion system, ships can significantly reduce their fuel consumption and thus their emissions.
ShaPoLi is particularly relevant in the context of the requirements of the International Maritime Organization (IMO) to comply with the Energy Efficiency Existing Ship Index (EEXI) and helps to minimize the environmental impact of the global shipping industry.
Our Shaft Power Limitation (ShaPoLi) with alarm on the bridge and subsequent manual power limitation by the nautical personnel.
shapoli report simulated
measurement Shapoli with EEXI limit
load diagram Shapoli
Description
Scope of supply
The TXM ShaPoLi system Shaft Power Limitation solution as optional equipment for the TORXmeter® shaft power meter or any other manufacturer for shaft power meter. The system is a highly accurate and cost-effective measurement system in comparison with other power limitation solutions, e.g., engine power limitation (EPL).
The system is developed according to the latest EEXI Implementation Guidelines, published by the International Association of Classification Societies (IACS) in Rec. No. 172, which refers to the MEPC.335 (76). Our system is the reduced solution with an alarm on the bridge and, afterwards, manual power limitation by the nautical personnel.
The system constantly displays the actual shaft power. Any override of power limitation is visually and acoustically indicated on the bridge in the form of an alarm, forcing the ship’s master or officer in charge of navigational watch (OICNW) to manually reduce the power to reach the limits again. However, if unlimited power is necessary and confirmed with valid reason, the event is logged in a safe format. This logged data can always be viewed subsequently.
When ordering the system, TX Marine Messsysteme GmbH will ask for a questionnaire. This is used to the setup of the Display with ShaPoLi solution and the completion of the OMM (onboard management manual), which is also a part of the scope of supply. In this questionnaire, all necessary data are requested.
1. TXM ShaPoLi Display WH (Wheelhouse)
2. Additional hardware for integration of nautical data or shaft power sensors. Possible additional equipment:
a. 5NMEA Multiplexer
b. 8NMEA Multiplexer
c. BRC Baud rate converter