JPH0932578A - Liquid air supply method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To install a driving device such as a motor-driven pump, dispense with motive power or the like for it, and significantly save electric power by turing liquid air into air having high enthalpy by heating it by a chilling unit and a regenerative heat exchanger, and supplying the liquid air by driving a turbo pump by this air. SOLUTION: A liquid air manufacturing device 1 liquefies air by using nighttime electric power, and stores manufactured liquid air in a tank 5. When a generator 13 is started, a pressurizing device 6 and a motor-driven pump 14 are driven, and the liquid air in the tank 5 is discharged after being pressurized, and after it is started, the liquid air is supplied by a turbo pump 7. The supplied liquid air is supplied to a regenerative heat exchanger 9 after cold air is generated by a chilling unit 8, and is supplied to the turbo pump 7 after heat exchange with turbine exhaust gas is performed. After pressure is increased here, it is burnt in a combustion chamber 11 together with fuel from a fuel tank 10, and the genarator 13 is actuated by driving a power generating turbine 12 by generated high pressure gas.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of supplying liquid air in a system such as a gas turbine power generator which utilizes liquid air in the operating system of related equipment.

[0002]

2. Description of the Related Art FIG. 2 illustrates an apparatus for cooling and heating and gas turbine power generation using liquid air conventionally used.

A liquid air manufacturing facility 1 liquefies the air by using electric power at night and the like, and the heat component obtained in the process is collected into hot water in a heat exchanger 2 and stored in a hot water storage tank 3.

On the other hand, the produced liquid air is stored in the liquid air tank 5.

In the daytime, the liquid air stored in the liquid air tank 5 is taken out by the electric pump 14 and supplied to the subsequent operating system. That is, the liquid air is the heat exchanger 21 first.
Then, the temperature is raised in the air conditioner 8 or the heater 15 which is selectively switched to operate, then enters another heat exchanger 22 and is further raised in temperature to be aerated, and finally supplied to the refuse incinerator 16. Acts as combustion air.

The combustion exhaust gas generated in the incinerator 16 in the presence of combustion air is supplied to the turbine 12 and the generator 13
To obtain electric energy.

[0007]

The prior art is constructed as described above, and since the liquid air is supplied into the system by the electric pump 14, the driving power becomes large, There is a problem that the output of the power generator is consumed by oneself, and the generated power decreases.

In addition, the turbine 12 is selected according to the load of the output system.
There is a problem in that controlling the operation of (1) also changes the air supply and requires a control mechanism therefor. An object of the present invention is to solve such a problem.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, in which liquid air is heated by a cooling device and a regenerative heat exchanger into high enthalpy air, and this air drives a turbo pump. And a liquid air supply method for supplying liquid air.

Further, the present invention provides a liquid air supply method in which liquid air is supplied by a supply device attached to a liquid air tank at the time of start-up and gradually switched to supply by a turbo pump.

That is, in the present invention, the liquid air receives heat from the air at room temperature to increase its own enthalpy in the cooling device, and the regenerative heat exchanger receives exhaust heat from the power generation turbine or the like to increase the enthalpy. In this way, a turbo pump driven by air given a high enthalpy can easily pressurize liquid air and supply it to the system.

At the time of start-up, when the supply of liquid air is started by an appropriate supply device attached to the liquid-air tank to start the turbo pump and the like, and then the power generation turbine and the like are also started, the temperature of the regenerative heat exchanger also rises and rotates. As a result, a cycle in which the driving force of the turbo pump also increases will be completed.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. In order to facilitate understanding, the portions functionally corresponding to those of the conventional technique described above with reference to FIG. 2 are denoted by the same reference numerals.

Reference numeral 1 is a liquid air producing apparatus, which liquefies air by utilizing nighttime electric power. The heat generated at that time is heat-exchanged by the heat exchanger 2 and stored in the hot water storage tank 3. The produced liquid air is stored in the liquid air tank 5 through the control valve 4.

The power generator is started by the pressurizing device 6 or 1 attached to the liquid air tank 5 as a supply device for starting.
It is performed by pressurizing and discharging liquid air with the electric pump of 4. Pressurization and supply of liquid air after startup is performed using the turbo pump 7 described above.

The pressurized liquid air is supplied to the air conditioner 8 to exchange heat with the room temperature air to enhance the enthalpy. The pressurized air that has exited the cooling device of 8 is then supplied to the regenerative heat exchanger of 9 and exchanges heat with the turbine exhaust gas to further raise the enthalpy, and is supplied to the turbine portion of the turbo pump of 7.

The air exiting the turbine section of the turbo pump 7 and the fuel supplied from the fuel tank 10 burn in the combustion chamber 11 to drive the generator turbine 12 to operate the generator 13 .

As described above, in this embodiment, the seven turbo pumps are used for supplying the liquid air, and the seven turbo pumps are driven by utilizing the exhaust heat of the twelve power generation turbines. Therefore, the driving power of the turbo pump 7 for supplying the liquid air can be greatly saved.

Although the present invention has been described with reference to the illustrated embodiments, the present invention is not limited to these embodiments.
It goes without saying that various modifications may be made to the specific structure within the scope of the present invention.

[0020]

As described above, according to the present invention, a turbo pump is used for supplying liquid air, and in this turbo pump, liquid air itself receives heat input through a cooling device in a system path, and regenerative heat exchange. It is driven by high enthalpy air that effectively utilizes exhaust heat of the power generation turbine after passing through the reactor.Therefore, it is not necessary to install a drive device such as an electric pump and power for that purpose. The electric power required for the operation of the system was greatly saved.

Further, even if there is a leak from the pump side of the turbo pump to the turbine side, since it is eventually supplied to the combustion chamber, there is no loss in the flow rate.

Further, according to the second aspect of the invention, at the time of start-up, liquid air is supplied by the tank pressurization or the electric pump to start rotating the rotary system, and the driving force of the turbo pump increases as the combustion load increases. Therefore, it is possible to obtain the effect that the complicated control that is required when using the electric pump is not necessary.

[Brief description of drawings]

FIG. 1 is a system diagram showing one embodiment of the present invention.

FIG. 2 is a system diagram showing a conventional technique.

[Explanation of symbols]

 1 Liquid Air Manufacturing Device 5 Liquid Air Tank 6 Pressurizing Device 7 Turbo Pump 8 Cooling Device 9 Regenerative Heat Exchanger

Claims (2)

[Claims] 1. A liquid air supply characterized in that liquid air is heated by a cooling device and a regenerative heat exchanger to obtain high enthalpy air, and a turbo pump is driven by this air to supply the liquid air. Method. 2. The liquid air supply method according to claim 1, wherein liquid air is supplied by a supply device attached to the liquid air tank at the time of start-up, and gradually switched to supply by a turbo pump.