1.Problem
In the context of cruise ship operations, the engine is the core power unit, and the flow conditions of the front and rear pipelines play a crucial role in evaluating the engine's operating efficiency, fuel consumption, and overall performance. Previously, a cruise ship company in France had long lacked effective means to accurately and real-time measure the total flow difference between the front and rear pipelines of the engine. This has led to significant blind spots in monitoring the engine's operating status and performance evaluation, making it impossible to promptly detect potential issues such as inefficiency and fuel waste, bringing numerous inconveniences and latent risks to the operation and maintenance of the cruise ship, and also being unfavorable for the company's precise control of operating costs.
2.Requirements
Customers urgently need a reliable measurement system to accurately obtain the total flow difference between the front and rear pipelines of the cruise ship engine. Based on this difference data, on the one hand, it can be used to evaluate the engine's working efficiency and determine whether the engine is operating in an optimal state; on the other hand, it can also provide a basis for optimizing fuel consumption, thereby reducing the operating costs of the cruise ship, while ensuring the long-term stable and efficient operation of the engine and safeguarding the normal operation rhythm of the cruise ship.
3.Challenges
The operating environment of cruise ships is extremely complex, with various adverse factors such as vibration, high temperature, humidity changes, and electromagnetic interference existing in the engine room. These factors place extremely high demands on the accuracy, stability, and anti-interference ability of measuring equipment. Ordinary flow measuring equipment often struggles to work continuously and accurately in such harsh environments, and is prone to data deviation or even equipment failure. In addition, due to the limited space and compact structure of cruise ships, the installation and wiring of measuring equipment also face significant challenges, requiring the equipment to have a small size and flexible installation methods to adapt to the special spatial layout of cruise ships.
Jujea conducted a comprehensive assessment and analysis of the client's overall needs, developed targeted solutions, and provided the client with guiding suggestions and methods.
4.1 Product Configuration
Quantity: 4 sets
Diameter：DN15
Flow Range：0.6 - 6m³/h
Accuracy：±1%
Connection：male thread
Power Supply）：24VDC
Signal Output：4 - 20mA
Body Material：SS304
Impler material：2Cr13
Pressure Level：6.3MPa
Quantity: 2 sets
Channels: 3 channels, of which 2 channels are 4 - 20mA input channels for connecting turbine flow meters; 1 channel is used to display the difference between channels 1 - 2, including the total flow difference and the instantaneous flow difference.
Functions: It has the function of total flow accumulation; is equipped with 2-channel relay outputs; the communication interface is
RS485 and supports USB functionality, with free PC software provided; it is powered by 24VDC; and uses an English version interface.
4.2 System Setup and Workflow
a. Equipment Installation: Install two jujea brand turbine flow meters on the front and rear pipelines of the cruise ship engine respectively, which are used to collect the flow data before and after the engine. The flow meters adopt external thread connection, which facilitates installation and fixation on the pipeline. Their main body material of SS304 and impeller material of 2Cr13 can withstand the complex environment inside the engine room, ensuring long-term stable operation and coping with adverse factors such as vibration and high temperature.
b. Data Transmission and Recording: Connect the turbine flow meters installed before and after the engine to the first and second channels of the jujea data recorder GT68R, respectively. The 4 - 20mA signals output by the flow meters are received by the data recorder, which, relying on its own flow accumulation function, records and accumulates the received flow data in real time, providing basic data support for subsequent difference calculations.
c. Difference Calculation and Display: The third channel of the data recorder automatically calculates the difference between the flow data collected by the first and second channels through a pre-set internal program formula, obtaining the total flow difference between the front and rear pipes of the engine, and clearly displays it on the recorder interface for easy real-time viewing by staff. Meanwhile, the RS485 communication interface and USB function of the recorder enable convenient data transmission to the PC, where further analysis and processing of the data can be performed via free PC software, such as generating data reports and conducting trend analysis, providing a more comprehensive basis for engine performance evaluation and operational decision-making.
5.Results
Through this measurement system consisting of a turbine flowmeter and a GT68R data recorder designed, developed, and produced by jujea Manufacturer, French customers have successfully achieved real-time and accurate measurement of the total flow difference between the front and rear pipelines of cruise ship engines. The precise flow difference data provides solid data support for the operation monitoring and performance evaluation of cruise ship engines. Based on this data, cruise ship companies can promptly adjust engine operating parameters, optimize fuel consumption strategies, significantly improve engine efficiency, and effectively reduce operating costs. For example, based on the flow difference data, staff discovered that the flow difference between the front and rear of the engine was abnormal during a certain period. After timely investigation, they found that it was caused by wear of internal engine components, and carried out targeted repairs, thus avoiding more serious failures and greater cost losses. In addition, during the long-term operation of cruise ships, this measurement system has demonstrated excellent stability and reliability, continuously and stably providing accurate flow data, fully meeting the customer's requirements for flow measurement, and has received high recognition and praise from customers. It has also accumulated a good reputation for the jujea brand in the international industrial measurement field and provided a good example for subsequent similar industrial measurement projects.
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