JPS61204527A - Measuring instrument for gas temperature at exit of exhaust flue of heat engine - Google Patents

Abstract

PURPOSE:To measure the temperature of exhaust gas with high precision at low cost by calculating heating values from data on temperatures and flow rates of exhaustion and suction, and finding the temperature of exhaust gas at the exit of a flue from the sum of the heating values. CONSTITUTION:Respective measurement data of gas turbine exhaustion temperature and flow rate detectors 1 and 2, package exhaustion temperature and flow rate detectors 3 and 4, generator exhaustion temperature and flow rate detectors 5 and 6, and cooling suction temperature and flow rate detectors 7 and 7 are supplied to the CPU 11 of a measuring instrument body 9. The CPU 11 calculates the heating values of exhaustion and suction from those data according to a program which is inputted previously, and calculates the temperature of gas at the flue exit from the sum of the heating values to display it on a display device 13. Consequently, the exhaustion temperature at the flue exit is calculated with high precision and numbers of thermometers need not be installed, so that a measurement is taken at low cost.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a heat engine exhaust flue outlet gas temperature measuring device for measuring the temperature of exhaust flue exit gas in a heat engine such as a gas turbine power generator. be.

[Conventional technology]

FIG. 4 is a configuration diagram of a gas turbine exhaust flue outlet gas temperature measuring device in the case of a conventional gas turbine power generation device shown in Densetsu Kogyo, July 1982 issue, pages 48-49. In the figure, 1 is a gas turbine exhaust temperature detector, 32
13 is a temperature converter that converts the temperature signal detected by the gas turbine exhaust temperature sensor a1, and 13 is a display device that displays the gas turbine exhaust temperature based on the output signal from the temperature converter 32.

Next, the operation will be explained. The temperature signal detected by the gas turbine exhaust temperature detector 1 is converted into a signal by the temperature converter 32, and the converted signal is input to the display device 13, making it possible to measure the gas turbine exhaust temperature.

[Problem that the invention seeks to solve]

The conventional gas turbine exhaust flue outlet gas temperature measuring device is
With the above configuration, only the high temperature exhaust gas at the gas turbine exhaust port can be measured, and the temperature at the flue outlet has not been measured. In addition, conventionally, if temperature was to be measured at the exhaust flue outlet, accurate temperature measurement could not be achieved by measuring at one point because the flue outlet has a large cross-sectional area and is easily influenced by outside air. In order to perform accurate measurements, it is necessary to use a large number of temperature detectors and calculate the average value, which has the disadvantage of being expensive. Furthermore, in order to measure the temperature at the flue outlet, the distance between the measurement point and the monitoring location is long, so there is a drawback that the temperature is easily affected by noise and the like.

This invention was made to solve the above-mentioned problems, and provides an inexpensive heat engine exhaust flue outlet gas temperature measuring device that can accurately measure the exhaust temperature of a heat engine at the heat engine exhaust flue outlet. The purpose is to

[Means for solving problems]

A heat engine exhaust flue outlet gas temperature measuring device according to the present invention measures the temperature of exhaust gas generated from various parts of a heat engine.

The temperature and flow rate of the intake air used for the purpose of cooling the exhaust air are measured, and each of these data is processed in a computer system to calculate the amount of heat of each exhaust air and intake air. The gas temperature at the flue outlet is determined from the total amount of heat at the outlet.

[Function] The heat engine exhaust flue outlet gas temperature measuring device according to the present invention measures the temperature at the flue outlet based on the amount of heat generated by the heat engine, so that the temperature at the flue outlet is measured.

Highly accurate temperature measurement can be achieved without being affected by temperature fluctuations.

〔Example〕

An embodiment in which the present invention is applied to a turbine exhaust flue outlet gas temperature measuring device will be described below with reference to the drawings. In FIG. 1, 1 is a gas turbine exhaust temperature detector, 2 is a gas turbine exhaust flow rate detector, 3 is a package exhaust temperature detector, 4 is a package exhaust flow rate detector, 5 is a generator exhaust temperature detector, and 6 is a generator exhaust temperature detector. Generator exhaust flow rate detector, 7 is a cooling intake air temperature detector, 8 is a cooling intake air flow rate detector %, 9 is the main body of the gas turbine exhaust flue outlet gas temperature measuring device, 10 is each detector 1
The signal detected by ~8 is taken in and converted to 5C by A/D conversion.
An input device 11 is used to convert each data input via the input device 10 into a signal that can be processed by the PUL l, and outputs the gas temperature at the flue outlet according to the contents of a pre-input program. CP to execute
U, 12 is an output device for outputting output data processed by the CPU 11 to a display device 13, and 13 is a display device for externally displaying the flue outlet temperature.

Further, FIG. 2 shows the configuration of the gas turbine power generator and the flows of each exhaust and intake air. 14 is a building in which the gas turbine generator is installed; 15 is an intake port for taking in cooling intake air from outside air; 16 is an exhaust flue outlet for discharging the exhaust gas generated from the gas turbine generator to the outside; 17 is a gas turbine A generator package, 18 a gas turbine, 19 a speed reducer, 20 a generator, 21 a package 17
Exhaust fan inside the package for exhausting the air inside, 2
2 is an intake fan for sucking cooling intake air from the outside and mixing it with each exhaust, 23 is a gas turbine exhaust flow, 24 is a package exhaust flow, 25 is a generator exhaust flow, 26
indicates cooling intake air.

Next, details of the operation of one embodiment of the present invention will be explained. Each of the exhaust gases 23 to 25 is mixed with the cooling intake air 26 and discharged to the outside from the exhaust flue outlet 16.
~25. The total amount of heat of the cooling intake air 26 is the exhaust flue outlet 16.
equal to the amount of heat in Further, since the amount of heat and the temperature can be expressed by a constant function, the temperature at the exhaust flue outlet 16 can be determined in a linear manner.

Exhaust outlet temperature Tθ: r (I) Here, T is T/Talby at the exhaust flue outlet 16, and is expressed as. Here, gl(Q4.T1) ~ to 4(Q
4, Ta) is for each exhaust 23-25. It indicates the amount of heat of the intake air 26. Q1 to Q4 indicate the amount of heat of each exhaust gas 23 to 25.
．． This is the flow rate of the intake air 26, and is detected by the flow rate detectors 2, 4, and 6.8, respectively. T1 to T4 are each exhaust 23 to 25,
This is the temperature of the intake air 26, and is detected by temperature detectors 1 and 3°5.7.

In this invention, as shown in the flowchart of FIG.
a, T+ to T4 are input to the CPU II via the input device 10.
The temperature at the exhaust flue outlet 16 is calculated by performing the above matter=dimension calculation process, and the exhaust flue outlet temperature Tθ is output to the display device 13 via the output device 12.

Furthermore, although the above embodiments have been described with respect to a gas turbine power generation device, the present invention can be similarly applied to measurement of the exhaust flue outlet temperature of other heat engines.

〔Effect of the invention〕

As described above, in this invention, the temperature and flow rate of the exhaust gas generated from various parts of the heat engine and the temperature and flow rate of the intake air that cools the exhaust gas are detected, and the amount of heat of each exhaust air and intake air is calculated from these detected data, and the Since the gas temperature at the flue outlet is determined from the sum of the above-mentioned amounts of heat at the exhaust flue exit, highly accurate measurement is possible regardless of the influence of outside air temperature at the exhaust flue exit or large errors due to temperature unevenness at the measurement location. It has the effect of being able to achieve this at a low cost.

[Brief explanation of drawings]

FIG. 1 is a block configuration diagram showing the configuration of a heat engine exhaust flue outlet temperature measuring device according to an embodiment of the present invention, and FIG. A schematic diagram showing the flow of intake air, FIG. 3 is a flowchart showing the operation of a heat engine exhaust flue outlet gas temperature measuring device according to an embodiment of the present invention, and FIG. 4 is a flowchart showing the operation of a conventional gas turbine exhaust gas temperature measuring device. FIG. 2 is a block configuration diagram showing the configuration. 1 is a gas turbine exhaust temperature detector, 2 is a gas turbine exhaust flow rate detector, 3 is a package exhaust temperature detector, 4 is a package exhaust flow rate detector, 5 is a generator exhaust temperature detector,
6 is a generator exhaust flow rate detector. 7 is an intake air temperature detector, 8 is an intake air flow rate detector, 9 is a measuring device main body, 10 is an input device, 11 is a CPU, 12 is an output device, and 13 is a display device. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Figure 1 +I: CPU Figure 2 Figure 3rM Figure 4

Claims (1)

[Claims] A plurality of detectors measure the temperature and flow rate of the exhaust gas generated from various parts of the heat engine and the temperature and flow rate of the intake air that cools the exhaust gas, and each data from each of the detectors is input to calculate the amount of heat of each exhaust gas and intake air. A heat engine exhaust flue exit gas temperature measuring device comprising a measuring device main body that calculates and calculates the gas temperature at the flue outlet from the sum of the respective amounts of heat at the flue exit.