JPH094419A - Actual head and actual fall testing device - Google Patents

Abstract

PURPOSE: To adopt excessive heat energy to driving of a steam turbine by arranging a heat recovering heat exchanger on a water circulation passage, arranging a low boiling point medium circulation passage between the heat recovering heat exchanger and a steam turbine, and arranging a low boiling point medium press-feeding pump and a low boiling point medium heating heat exchanger on the low boiling point medium circulation passage. CONSTITUTION: A pump 1 is driven by an output of a turbine shaft 10 and a steam turbine shaft 11. The pump 1 gives head to a turbine 2 through a water circulation passage 7, and also gives rotation. Water fed out from the turbine 2 returns to the pump 1. During this circulation, loss is generated and converted into thermal energy in the water circulation piping 7. Low boiling point medium which is fed out from a steam turbine 3 and liquefied is press-fed by means of a low boiling point medium pump 6 in a low boiling point medium circulation passage 8. It is then heated by a heating heat exchanger 5 recovering heat inside the water circulation passage 7 by means of a heat recovering heat exchanger 4 for vaporization. It is then fed to the steam turbine 3 for driving it. The low boiling point medium fed out from the steam turbine 3 is gradually liquidified, and press-fed by a pump 6 again for circulation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a test apparatus applied to an actual head and head test of a water turbine and a pump.

[0002]

2. Description of the Related Art FIG. 2 is a system diagram of a conventional actual head and actual head test device. This device is used to check the structure of the turbine or pump and to check the vibration condition under the same conditions as in actual operation. In the figure, 1 is a pump, 2 is a water turbine, 3 is a steam turbine, 9 is a pump drive shaft,
Reference numeral 10 is a water turbine shaft, 11 is a steam turbine shaft, and 12 is a gear attached to each of the shafts, which are meshed with each other as shown in the drawing. 14 is a heat exchanger for cooling, 7 is a pump 1
From the water turbine 2 to the pump 1 via the water turbine 2 and the heat exchanger 14, and 13 is a steam pipeline from the boiler (not shown) to send steam to the steam turbine 3 and back to the boiler.

In this apparatus, the pump 1 gives a head to the water turbine 2 by the rotation of the impeller, and the water turbine 2 inputs the shaft output obtained by the rotation to the pump drive shaft 9 via the water turbine shaft 10 to drive the pump 1. Use as power. However, the output of the water turbine 2 is smaller than the input required by the pump 1 due to line loss and the like, and it is necessary to add the output of the steam turbine 3 to the output of the water turbine 2 in order for the pump 1 to generate the required head. . Therefore, steam is sent from the steam pipe 13, the steam turbine 3 is driven, and it is used as a part of the driving force of the pump 1. Since the pipe loss in the water circulation pipe is almost heat, the heat is absorbed and discharged by the heat exchanger 14 for cooling. In the apparatus having such a configuration, the water turbine 2 is the specimen, and its inlet pressure, outlet pressure,
A pressure gauge, a tachometer, and a flow meter are installed to measure the rotation speed and the flow rate in the pipeline, and the test situation is confirmed by these. The above configuration is the configuration for the turbine test, but when performing the pump test, the positions of the pump 1 and the turbine 2 are exchanged, and the pump test is performed at the original position of the turbine.

[0004]

In the conventional apparatus, the heat energy was taken out and discarded in order to suppress the temperature rise of the water circulation circuit. Also, heat energy was supplied from the outside to drive the steam turbine. Therefore, the heat energy was wasted.

The present invention aims to solve the above-mentioned drawbacks of the prior art and to effectively use the thermal energy by using the discarded thermal energy for driving the steam turbine to improve the overall thermal efficiency of the test apparatus. To do.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems and includes a pump, a water turbine, and a steam turbine, which are arranged so as to be interlocked with each other by meshing gears provided on respective rotary shafts, and In the actual head actual head test device for testing the pump or the water turbine, which is provided with a water circulation pipe provided between the pump and the water turbine, and supplies the heated medium to the steam turbine to rotate the water circulation pipe to the water circulation pipe. A heat recovery heat exchanger is provided, and a low boiling point medium circulation pipeline is provided between the heat recovery heat exchanger and the steam turbine.
Further, the present invention relates to an actual head and actual head difference test device characterized in that a pump for feeding a low boiling point medium and a heat exchanger for heating the low boiling point medium are provided in the low boiling point medium circulation pipe line.

[0007]

[Operation] The heat energy generated by the line loss in the water circulation line is recovered by the heat recovery heat exchanger, and the low boiling point medium is collected together with the heat applied from the outside to the low boiling point medium heating heat exchanger. It vaporizes and drives a steam turbine. Conventionally, the heat generated in the water circulation pipe has been discarded, but in the present invention, since there is no heat to be discarded, it is possible to effectively utilize thermal energy.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a system diagram of an actual head and actual head test device according to an embodiment of the present invention. In the figure, the arrangement configuration of the pump 1, the water turbine 2, the steam turbine 3, the pump drive shaft 9, the water turbine shaft 10, the steam turbine shaft 11, the gear 12, and the water circulation pipeline 7 is the same as that of the conventional technique (FIG. 2). Reference numeral 4 denotes a heat recovery heat exchanger provided on a pipe line 7 for water returning from the water turbine 2 to the pump 1, and 8 denotes the heat recovery heat exchanger 4 to the steam turbine 3
Via the low boiling point medium circulation pipe returning to the heat recovery heat exchanger 4 again, 6 is a low boiling point medium pump provided in the return side pipe line of the pipe line 5, and 5 is also the same line 8 It is a heat exchanger for heating provided in the return side pipe, and heat is supplied from the outside for heating the low boiling point medium.

In this apparatus, the pump drive shaft 9 is driven via the gear 12 by the outputs of the water turbine shaft 10 and the steam turbine shaft 11. This drives the pump 1. The pump 1 gives a head to the water turbine 2 through a water circulation pipe line 7 to give a rotational force. The water leaving the water turbine 2 returns to the pump 1 again, but a loss occurs in this circulation, and is converted into thermal energy in the water circulation pipe line 7.

In the low-boiling-point medium circulation pipe 8, the low-boiling-point medium liquefied from the steam turbine 3 is pumped by the low-boiling-point medium pump 6, heated by the heating heat exchanger 5, and further heat recovery heat exchange. The heat in the water circulation pipe 7 is recovered and vaporized by the vessel 4 and sent to the steam turbine 3 to drive it. The low boiling point medium that has left the steam turbine 3 is gradually liquefied, and is pumped again by the pump 6 to circulate.

In this embodiment, the thermal energy which has been conventionally discarded can be effectively returned to the cycle, and the total efficiency of the actual head and actual head difference test can be improved. Therefore, it is possible to significantly reduce the running cost of the test.

[0012]

In the actual head and actual head test device of the present invention, a heat recovery heat exchanger is provided in the water circulation pipe, and a low boiling point medium circulation is provided between the heat recovery heat exchanger and the steam turbine. Since a pipe line is provided and a pump for pumping a low boiling point medium and a heat exchanger for heating a low boiling point medium are provided in the low boiling point medium circulation line, the heat generated in the water circulating pipe line that was conventionally discarded is recovered. However, since it is used for driving a steam turbine, energy is effectively used, and the overall thermal efficiency of the test apparatus can be improved.

[Brief description of drawings]

FIG. 1 is a system diagram of an actual head and actual head test device according to an embodiment of the present invention.

FIG. 2 is a system diagram of a conventional actual head and actual head test device.

[Explanation of symbols]

 1 Pump 2 Water Turbine 3 Steam Turbine 4 Heat Recovery Heat Exchanger 5 Heating Heat Exchanger 6 Low Boiling Medium Pump 7 Water Circulation Pipeline 8 Low Boiling Medium Circulation Pipeline 9 Pump Drive Shaft 10 Water Turbine Shaft 11 Steam Turbine Shaft 12 Gear 13 steam line 14 heat exchanger for cooling

Claims (1)

[Claims] 1. A pump, a water turbine, which is arranged so as to interlock with each other by meshing gears provided on respective rotary shafts,
And a steam turbine, and a water circulation pipe line provided between the pump and the water turbine, and an actual head actual head test device for testing the pump or the water turbine by supplying a heated medium to the steam turbine to rotate the medium. , A heat recovery heat exchanger is provided in the water circulation pipe, a low boiling medium circulation pipe is provided between the heat recovery heat exchanger and the steam turbine, and a low boiling medium circulation pipe is provided in the low boiling medium circulation pipe. An actual head lifting test apparatus, which is equipped with a medium pressure pump and a heat exchanger for heating a low boiling point medium.