JPS6219520Y2 - - Google Patents

Description

[Detailed explanation of the idea] Regardless of whether it is a turbine ship or a diesel ship, engine room ventilation fans are generally started and stopped manually, so once started, the person in charge of the engine department deems it unnecessary and leaves it running until it is stopped. . On the other hand, the amount of air required in the engine room varies depending on the load conditions of the main engine, boiler, generator, diesel, etc., and it is wasteful to operate all the ventilation fans until the load on these is low. .

This invention is based on the load status of each equipment in the engine room.
The aim is to reduce energy consumption by operating only the minimum number of fans that provide the necessary and sufficient amount of ventilation. In other words, the required air volume in the engine room is determined by the load status of each device, so this is easily processed as an input signal, and the output signal is a 2-3 step digital signal that automatically controls the number of operating engine room ventilation fans. The idea is to let it happen.

Therefore, the present invention is designed for ships equipped with a diesel main engine, main boiler, auxiliary boiler, power generation engine, etc. in the engine room, and multiple ventilation fans exclusively for the engine room, except for gas turbine-powered ships that directly take in outside air. It can be applied to all ships with

Next, embodiments of the present invention will be described with reference to the drawings.
Reference numerals A to E in the figure are function generators, which receive input of various conditions in the engine room and output respective required airflow volumes. To be more specific, (A) Main engine: In the case of a diesel ship, the amount of air required strictly depends on the FO composition, etc.
Here, it is linked to the rotation speed. Therefore, an analog signal is taken from the inboard main engine rotation indicator.

(B) Boilers: There are various types such as main boilers for turbine ships, auxiliary boilers for diesel tankers, and donkey boilers for diesel ships, but large-capacity boilers take an analog signal linked to the amount of FO. The signal can be obtained from an automatic combustion device. For small capacity boilers, ignition and extinguishing
A two-step ON/OFF signal is sufficient.

(C) Generator: A digital signal linked to the number of units in operation may be used.

(D) Cooling elements: If the temperature in the engine room increases, it is necessary to increase the amount of ventilation, and this is linked to the temperature in the engine room. Simply, it may be a two-stage digital signal with a certain temperature as the boundary.

(E) Differential pressure with the atmosphere: It is undesirable if the engine room pressure becomes excessively negative or pressurized relative to the atmosphere, so a method of backing up by incorporating a differential pressure element is adopted.

Next, (F) is a setting device that sets the minimum ventilation amount by taking ventilation factors and other factors into consideration, and provides the minimum value of the ventilation amount as a bias amount, which is input manually. Further, 1 is an adder for the input signal. 2 quantizes the added analog signal, and if it is desired to control the engine room ventilator in n stages, an n stage comparator is provided and output signals are output in n stages. 3 is a so-called output signal matching device, and the motor starter is suitable for providing start/stop signals. 4 is a starter for the ventilator, and 5 is a ventilator motor. It works automatically so that the total air volume of the operating ventilation fans always matches the air volume required for the engine room.

[Brief explanation of the drawing]

The accompanying drawings are block diagrams showing one embodiment of the present invention. A to E are function generators, E is a minimum air flow setting device, 1 is an adder, 2 is an n-stage comparator, 3 is an output signal matching device, 4 is a starter for the ventilator, and 5 is a ventilator motor.

Claims (1)

[Scope of utility model registration request] The number of revolutions of the main engine, the amount of fuel supplied to the main engine or main boiler, the number of generators in operation, the engine room temperature, and the differential pressure between the engine room pressure and atmospheric pressure are each input, and the required ventilation amount corresponding to these inputs. 5 function generators that output signals; Minimum ventilation volume setting device that sets the minimum ventilation volume; The output signals of the above 5 function setting devices and the minimum ventilation volume setting device are used as input signals, and these inputs are added. an adder that takes the output signal of the above adder as input and divides it into multiple stages according to the value of the input; and a comparator that takes the output signal of the above comparator as input and outputs the A device for controlling the number of operating ventilators in a ship's engine room, characterized by comprising an output signal matching device that gives a start/stop signal to a starter.