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HOPE Cloud (Tool for simple estimation of ship performance)

HOPE Cloud is a easy-to-use estimation tool of the propulsion performance (power curves in calm water and in waves) of a ship from its basic information (principal dimensions: length, breadth, and draft). NMRI's hull form database accumulated over many years ensures accurate estimation of this app.This tool has a wide range of uses, such as ship operation analysis, basic design, and fleet planning.

Outline

HOPE Cloud is a tool based on NMRI's hull form database for simple estimation of the propulsion performance (power curves in calm water and in waves) of a ship from its basic information (main particulars: length, breadth, and draft). This tool has a wide range of uses, such as ship operation analysis, basic design and fleet planning.

HOPE Cloud enables companies and individuals without their own ship databases to measure the performance of their ships. It also enables companies with ship databases to measure the performance of their ships in conditions in which the ships have not been operated.

Ship performance estimation tool "HOPE Light" had been developed as Microsoft Excel-based application. For HOPE Cloud, the web interface and the cloud computing technique improve the user-friendliness (usable anywhere any time) and linkage with other cloud services.


Interface

As a web application, HOPE Cloud allows the acquisition of data via its interface, as shown below. NMRI currently plans to provide data through an API interface suitable for data analysis of users' big data.

InputInterface

InputInterface

Output Interface

Output Interface

Comparison with previous calculation results

HOPE Cloud Output Data

Detailed information of ship's hull (wetted surface area, optimal longitudinal position of the center of buoyancy, etc.)

Resistance and propulsion performance (power requirement, form factor, wave drag coefficient, self-propulsion factor)

Ship performance in actual seas (added resistance in waves (waves/winds), power increment, increment of ship speed reduction), etc.


Example of analysis

Parametric Study of Principal Particulars of Ship Hull

The example below shows the results of a parametric study of the principal particulars of the hull of a 70,000-ton class bulk carrier conducted in the range of L/B = 5.0 – 8.0 and Cb = 0.80 – 0. The results show the difference in the sensitivity of power to the main particulars in calm water and B.F.6 waves and the difference in the optimal points of EEDI, which is related to deadweight and fuel efficiency, and power.

  • Horse power in calm sea.

    Horse power in calm sea.

  • Horse Power in actual sea.

    Horse Power in actual sea.

  • Approximate value of EEDI(fw=1.0)

    Approximate value of EEDI(fw=1.0)


To use this application

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