What Is TorqueSense ShaPoLi (Shaft Power Limiter)?
TorqueSense ShaPoLi stands out as a cutting-edge shaft power limiter, seamlessly incorporating the TorqueSense system for efficient power regulation. TorqueSense, known for its versatility, can be easily installed on any shaft, offering a significant advantage over traditional strain gauges. It plays a pivotal role in a comprehensive strategy aimed at boosting fuel efficiency and curbing greenhouse gas emissions.
The shaft power limiters are strategically employed to optimize power transmission within the ship’s propulsion system, ensuring the engine operates within its designated efficiency range. By averting excessive loads on the propulsion system during varying operational conditions, ShaPoLi minimizes fuel consumption, enhancing overall energy efficiency. This becomes particularly crucial for compliance with regulations like the Energy Efficiency Existing Ship Index (EEXI).
What Is EEXI, and What Role Does ShaPoLi Play in It?
The EEXI Regulation, a component of the International Maritime Organization’s (IMO) measures to combat greenhouse gas emissions in shipping, establishes efficiency standards for existing ships. As of December 2023, all operational merchant, cruise, and ferry vessels with a gross tonnage exceeding 400 GT* engaged in global trade are mandated to adhere to the specifications outlined in the International Maritime Organization’s Energy Efficiency Existing Ship Index (EEXI). This index sets a baseline for the minimum energy efficiency standards these vessels must meet (applicable under the jurisdiction of MARPOL Annex VI).
Ships surpassing specified emission thresholds must implement measures to enhance their energy efficiency, and optimizing power transmission through the use of shaft power limiters, such as ShaPoLi, is a key strategy. By aligning with EEXI requirements and improving fuel efficiency, ships can reduce their carbon footprint, contributing to sustainable maritime practices.
The shaft power limiters are strategically employed to optimize power transmission within the ship’s propulsion system, ensuring the engine operates within its designated efficiency range. By averting excessive loads on the propulsion system during varying operational conditions, ShaPoLi minimizes fuel consumption, enhancing overall energy efficiency. This becomes particularly crucial for compliance with regulations like the Energy Efficiency Existing Ship Index (EEXI).
What Sets It Apart From Its Competitors?
Strain Gauges Vs TorqueSense
| Torque Measurement using Strain Gauges | TorqueSense | |
|---|---|---|
| Installation | Transmitting an electrical signal from the strain gauge on a rotating shaft to the control unit is always challenging. | Our system is non-invasive, and it can be easily installed without the need for customization, making it more convenient and versatile. |
| Ease of Use | This method may require specialised knowledge and expertise for customization and installation. It may also involve additional steps, such as calibration. | TorqueSense is designed to be user-friendly and easy to install. It provides an interactive dashboard that allows for effortless monitoring and analysis of torque data. |
| Methodology | In this technique, strain is measured on the shaft to derive the twist angle, which is then used to calculate the torque. | In this technique, the twist angle is directly measured, and from this measurement, the torque is calculated. |
| Accuracy and Precision | Torque monitoring using strain gauges can provide accurate torque measurements when properly installed and calibrated. | Our system is designed to be a reliable method for calculating torque. It provides accurate and precise torque angle calculations, ensuring the integrity of the measured data. |
| Compatibility | This method is typically customised for a specific shaft. Once installed, it primarily monitors the torque on that particular shaft. | This solution offers compatibility with any shaft, making it more versatile. It can be used for different types of shafts without the need for customization. |
| Speed Limitations | At low to moderate speeds, they provide accurate and reliable measurements | The system has no speed restrictions. Regardless of the speed, torque sense delivers consistent and precise results. |
How Does It Help You?
Installation Setup:
- Install two pole bands on the shaft at a distance of 3.5 times the diameter of the shaft.
- Mount Hall Effect or MPU sensors on the brackets.
Basic Requirements:
- Two non-invasive MPU Sensors
- Two Poll Bands
How does TorqueSense ShaPoLi work?
These sensors transmit data to our intelligent controller. The controller acquires data for 45 to 90 seconds, depending on the shaft RPM, and then analyzes it for the next 20–40 seconds. Torque and power are displayed on the screen, and through an Ethernet switch, data can also be transmitted to the cloud.
The system measures the twist in the marine propeller shaft, providing real-time and direct measurement of torque and power. TorqueSense ShaPoLi utilizes this torque information to regulate power by adjusting the RPM of electronically controlled engines. By dynamically controlling power transmission, ShaPoLi optimizes efficiency, limits emissions, and contributes to environmental sustainability in maritime operations. This innovative solution enhances both operational performance and compliance with environmental regulations, making it a valuable tool for the maritime industry.
Applications of TorqueSense
Torque Measurement
To monitor the power and torque transmitted by the shaft.
Torque Limiter
In certain cases, it may be essential to limit the torque and Power on the drive equipment to maintain efficiency, fuel consumption, or emissions. The system can give an output signal if torque falls outside a specified range.
Indicators of TorqueSense
Technical Specifications of TorqueSense
| Nominal Input Voltage | 24 VDC |
|---|---|
| Operating Temperature | -40° to +70° C |
| Communication Interfaces | Ethernet RJ45 USB 2.0 CAN 2.0B |
| Speed Sensor Input Voltage | Analog: -24 V upto +24 V Digital: 0 V up to 12 V |
| Maximum Power Consumption | 10 W |
| Certifications | EN50155 |
| Speed Sensor | Jacquet Greenline MPU |
| Sensor Head | IP67 |
| Cable Outlet | IP68 |
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Certifications
IR Class – Approval For TorqueSense ShaPoLi (Shaft Power Limiter)