JP2015152265A5 - - Google Patents

Description

In the first embodiment , as illustrated in FIG. 1, the gas turbine 10 includes a compressor 11, a combustor 12, and a turbine 13. The gas turbine 10 is connected to a generator 14 and can generate power.

Here, the operation of the second heat exchangers 33 and 33A will be described in comparison with a conventional heat exchanger . FIG. 5 is a schematic diagram illustrating the operation of the conventional heat exchanger, and FIG. 6 is a schematic diagram illustrating the operation of the heat exchanger according to the first embodiment.

In addition, since the overheating of the fuel gas L is suppressed, a large heat load does not act on the constituent members (for example, heat transfer tubes) of the heat exchanging section 42 , and an increase in the plate thickness is unnecessary, resulting in a reduction in manufacturing cost. Increase can be suppressed. Further, since overheating of the fuel gas L is suppressed, no by-product (for example, iron sulfide: FeS) is generated, and the adverse effects of the by-product on the heat exchangers 33 and 33A can be prevented. it can.

The configuration of the second heat exchanger 33B is not limited to that described above. As shown in FIG. 8, the second heat exchanger 33C includes a fuel gas supply line 24, a cooling air line 28, a first heat exchange unit 41 and a second heat exchange unit 42, a bypass flow path 43, and a flow rate. The adjustment valve 47, the temperature sensor 45, and the control unit 46 are included.

Further, in the above embodiment, although the heat exchanger for heating the primary fluid by the secondary fluid may be a heat exchanger for cooling the primary fluid by the secondary fluid, in this case, over-cooling by the heat exchanger Can be suppressed.

Claims (5)

A primary flow path through which the primary fluid flows;
A secondary channel through which a secondary fluid flows in the primary channel;
A plurality of heat exchanging units for exchanging heat between the primary fluid and the secondary fluid;
A bypass flow path that bypasses at least one heat exchange section among the plurality of heat exchange sections;
A flow rate adjustment valve for adjusting the flow rate of the primary fluid flowing through the bypass flow path;
A temperature sensor for measuring the temperature of the primary fluid on the outlet side of the plurality of heat exchange units;
A controller that adjusts the opening of the flow rate adjusting valve according to the temperature of the primary fluid detected by the temperature sensor;
I have a,
The plurality of heat exchanging units include a first heat exchanging unit and a second heat exchanging unit connected in series, and one end of the bypass channel is connected to an inlet of the first heat exchanging unit, An end is connected to a connection part of the first heat exchange part and the second heat exchange part,
The first heat exchange part and the second heat exchange part are arranged in parallel, and an inlet part of the first heat exchange part and an outlet part of the second heat exchange part are arranged at one end, and the other end The connection part is arranged in the part,
A heat exchanger characterized by that. Said connection unit, the heat exchanger according to claim 1, wherein the upstream end of the second heat exchanger and the downstream end of the first heat exchanger is a header to be connected. Said connection unit, the heat exchanger according to claim 1, characterized in that a connection pipe connecting the upstream end of the second heat exchanger and the downstream end of the first heat exchanger . The heat exchanger according to any one of claims 1 to 3 , wherein the flow rate adjusting valve is provided in the bypass flow path. The heat exchanger according to any one of claims 1 to 3 , wherein the flow rate adjustment valve is a three-way valve provided at a branch portion between the primary flow path and the bypass flow path.

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