JPS6238B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power generation device for a diesel ship.

The power generation equipment in conventional diesel ships generally relies on the following combinations.

(a) One main shaft drive generator (if the propeller is a variable pitch propeller (CPP), only a synchronous generator;
For fixed pitch propellers (FPP), a combination of a synchronous generator and a thyristor converter/inverter) and two to three independent diesel engine-driven generators; (b) one exhaust gas turbo-driven generator and two to three independent diesel engine-driven generators; Combination with 2 or 3 independent diesel engine-driven generators (c) If only 2 or 3 independent diesel engine-driven generators are adopted (a), the main shaft drive generator will be used primarily during the voyage, and the diesel engine will be used as an auxiliary generator. A generator is used, and only the diesel engine-driven generator is used while at anchor.In this case, the propeller can be a variable pitch propeller with the main shaft rotating at a constant speed, or a fixed pitch propeller can be used to change the rotation speed of the main shaft. The main method is to generate electricity at a frequency proportional to , convert it to direct current (converter), and then convert it into a constant frequency power source using a thyristor inverter. This increases equipment costs for variable pitch propeller devices and thyristor converters/inverters, and for this reason, the use of main shaft drive generators is avoided. In the case of (b), during voyage, an exhaust gas turbo-driven generator using the exhaust gas emitted from the main engine is used as an auxiliary, and a diesel engine-driven generator is used as an auxiliary, and only the diesel engine-driven generator is used while at anchor. . In case (c), a diesel engine-driven generator will be used both during the voyage and while at anchor.

The present invention provides a main shaft driven induction generator (S/IG) 1
and exhaust gas turbo drive synchronous generator (T/SG)
Equipped with one or several independent diesel engine-driven synchronous generators (D/SG), the S/IG and T/SG operate in parallel during voyage, resulting in significant fuel savings and equipment costs. The present invention proposes a power generation device that is inexpensive and can supply stable power.

In order to achieve the object of the present invention, a water supply heater whose heat source is heat generated by a secondary resistance inserted in a main shaft drive induction generator is interposed in the water supply path of an exhaust gas turbo mechanism.

An embodiment of the present invention will be described below based on the drawings. In Figure 1, 1 is a spindle-driven induction generator (S/IG), and since the rotation speed fluctuates as the rotation of the spindle changes, for example, the operating range is relative to the synchronous rotation speed (rotation speed when slip is zero). is selected to be 105-120%. Figure 2 shows the characteristics of an induction generator. 2
is a secondary resistance R inserted in order to operate the main shaft drive induction generator 1 stably in response to a wide range of rotational fluctuations, and is configured to be variable;
Heat loss occurs due to 3 is an exhaust gas turbo-driven synchronous generator (T/SG) that is driven using the exhaust gas of the main engine, and uses the heat generated by the secondary resistor 2 as a heat source for the feed water heater (FWH) (Fig. 3). , aiming to recover power losses. 4 is an excitation device for the exhaust gas turbo-driven synchronous generator 3. During the voyage, the main shaft drive induction generator 1 and the exhaust gas turbo drive synchronous generator 3 are operated in parallel. 5 is one or two independent diesel engine-driven synchronous generators, which are used primarily during berth and auxiliary use during voyage. 6 is an excitation device for the independent diesel engine driven synchronous generator 5.

Next, the drive mechanism of the exhaust gas turbo drive synchronous generator 3 will be explained with reference to FIG. The amount of heat generated by the secondary resistor 2 in FIG. 1 is used as a heat source for the feed water heater 7 to heat water sent from the water tank 8 to the auxiliary boiler 10 by the water pump 9, thereby recovering power loss. The hot water heated by the water supply heater 7 is transferred to the main engine 11.
The exhaust gas is heated to a high temperature and evaporated in the exhaust gas boiler 12 connected to the exhaust gas boiler 12, which drives the turbine 13 and rotationally drives the exhaust gas turbo drive synchronous generator 3. The steam exiting the turbine 13 is condensed in a condenser 14 and then sent to a condensate pump 1.
5 is returned to the water supply tank 8. 16 is a boiler circulating water pump.

As described above, according to the present invention, a main shaft-driven generator with a main engine having relatively low fuel consumption is employed, an induction generator is used as the generator, and an exhaust gas turbo-driven synchronous generator that utilizes the exhaust gas of the main engine is used in combination. In particular, the amount of heat generated in the secondary resistor inserted for stable operation of the induction generator is used as a heat source for the feed water heater of the exhaust gas turbo drive mechanism, and the power loss is recovered, which reduces equipment costs. Its industrial value is extremely large because it can efficiently supply stable power and contribute to energy conservation.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing one embodiment of the present invention, and FIG.
The figure is a characteristic diagram of the induction generator, and FIG. 3 is a configuration diagram showing the drive mechanism of the exhaust gas turbo-driven synchronous generator. 1...Main shaft drive induction generator, 2...Secondary resistance,
3...Exhaust gas turbo drive synchronous generator, 5...Independent diesel engine drive synchronous generator, 7...Feed water heater, 10...Auxiliary boiler, 11...Main engine, 1
2...Exhaust gas boiler.

Claims (1)

[Claims] 1. A main shaft-driven induction generator driven by the main engine, an exhaust gas turbo-driven synchronous generator driven using the exhaust gas of the main engine, and an independent diesel engine-driven synchronous generator, the main shaft-driven induction generator A power generation device for a diesel ship, characterized in that a water supply heater whose heat source is heat generated by an inserted secondary resistor is interposed in a water supply path of an exhaust gas turbo mechanism.