JPH075053A - Calorimeter - Google Patents

Abstract

PURPOSE:To measure calorie consumed by a heat-consuming source accurately by measuring average temperature of a fluid which flows into or out of the heat consumption source even when the temperature distribution of the fluid flowing through a piping is uneven due to a larger diameter of a piping to be connected to the heat consuming source. CONSTITUTION:Average temperature of a fluid flowing through a piping 1 is detected by a temperature detecting section 5 into which a plurality of temperature sensors are buried while the average temperature of the fluid flowing through the piping 3 is detected by an earth ring 19 into which a plurality of temperature sensors are buried. Moreover, the flow rate of the fluid flowing through the piping 3 is detected by an electromagnetic flowmeter 6 inserted into the piping 3 to compute calorie to be consumed by a heat consumption source 2 with a calorie computing device 7 based on the results of measurement.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a calorimeter for measuring the calorific value of a fluid flowing in a pipe arranged in a plant or the like.

[0002]

2. Description of the Related Art In a plant or the like, a calorimeter is arranged at a portion where it is necessary to measure the amount of heat of a fluid flowing in a pipe, and the calorimeter measures the flow rate and temperature of cold water or hot water flowing in the pipe. Then, the consumed heat amount is calculated, and a preset instruction or transmission is performed based on the instantaneous value of the heat amount obtained by this calculation process or the integrated value obtained by integrating the instantaneous values.

FIG. 11 is a block diagram showing an example of a plant using a calorimeter for measuring the calorific value of a fluid flowing through such a pipe.

The plant shown in this figure has a pipe 101 for taking in a fluid such as cold water or hot water, a heat consumption source 102 that is heated or cooled by a fluid supplied through this pipe 101, and this heat consumption source. Piping 103 for guiding the fluid that has passed through 102 to the outside, and each of these pipings 101,
And a calorimeter 104 for measuring a heat quantity difference (heat quantity consumed by the heat consumption source 102) of fluids flowing in and out via 103, and heat generated by the fluid supplied through the pipe 101 on the inflow side. The consumption source 102 is heated or cooled, and the flow rate and the amount of heat of each fluid flowing through the pipes 101 and 103 are measured by the calorimeter 104 and consumed by the heat consumption source 102 based on the measurement results. Measure the amount of heat generated.

The calorimeter 104 is provided in the pipe 101 on the inflow side, is provided in the temperature detecting unit 105 for measuring the temperature of the fluid flowing in the pipe 101, and is installed in the pipe 103 on the outflow side and flows in the pipe 103. Electromagnetic, impeller, or vortex flowmeter 106 for measuring the flow rate of the fluid, and a temperature detector 1 for measuring the temperature of the fluid flowing in the pipe 103.
07, and the respective pipes 10 based on the outputs of the temperature detecting units 105 and 107 and the flow meter 106.
1, a heat quantity calculator 108 for calculating a heat quantity difference between the fluids flowing through the pipe 103, the flowmeter 106 measures the flow rate of the fluid flowing through the pipe 103, and the temperature detecting units 105 and 107 measure the flow rate. Each of the pipes 10
1, the temperature of the fluid flowing in 103 is measured, and the heat quantity consumed by the heat consumption source 102 is calculated based on the measurement result of the flow meter 106 by the heat quantity calculator 108 and the measurement result of the temperature detection sections 105 and 107. Calculate and output the calculation result to the outside.

In this case, the calorie calculator 108 calculates the volume (flow rate) of the fluid passing in a unit time and the heat consumption source 102.
The calculation shown in the following equation is performed based on the temperature difference between the fluids flowing in and out to calculate the amount of heat consumed by the heat consumption source 102.

Q = kQ (T1-T2) (1) where q: heat quantity consumed by the heat consumption source 102 k: preset coefficient Q: inflow / outflow to the heat consumption source 102 Volume of fluid T1: Temperature of fluid flowing out from heat consumption source 102 T2: Temperature of fluid flowing into heat consumption source 102

[0008]

The conventional calorimeter 104 described above has the following problems.

That is, as shown in FIG. 12, the temperature detecting portions 105 and 107 used in the calorimeter 104 have a cylindrical mounting pipe 110 formed so as to communicate with the pipes 101 and 103, and the mounting pipe 110. It is composed of a closing plate 111 that closes the opening of the pipe 110, and a single temperature sensor 112 that is attached so as to penetrate the closing plate 111 and project into the pipes 101 and 103 as shown in FIG. There is.

Therefore, when the diameter of the pipes 101 and 103 is relatively small, the temperature of the fluid flowing through the pipes 101 and 103 can be accurately detected, but the pipe 10
When the diameters of 1 and 103 are large and the temperature distribution of the fluid flowing through the pipes 101 and 103 is non-uniform, the temperature sensor 11
In many cases, the temperature of the fluid obtained by 2 does not become the average temperature of the fluid flowing in the pipes 101 and 103.

Therefore, there is a problem that the amount of heat consumed by the heat consumption source 102 obtained by the calorimeter 104 becomes inaccurate.

In view of the above-mentioned circumstances, the present invention provides heat dissipation even when the temperature distribution of the fluid flowing through the pipe is uneven, such as when the diameter of the pipe connected to the heat consumption source is large. It is an object of the present invention to provide a calorimeter capable of accurately measuring the average temperature of each fluid flowing in and out of a heat source and thereby accurately measuring the amount of heat consumed by the heat consuming source.

[0013]

In order to achieve the above object, the present invention provides a temperature of a fluid flowing into a heat consumption source, a temperature of a fluid flowing out of the heat consumption source, and a flow rate of each fluid. In a calorimeter for measuring the amount of heat consumed by the heat consumption source based on, a plurality of temperature sensors or linear temperature sensor is inserted in the inflow side pipe of the heat consumption source, in the inflow side pipe An average of the fluid flowing in the outflow side pipe, which has a ring-shaped temperature detection unit for detecting the average temperature of the flowing fluid and a plurality of temperature sensors or linear temperature sensors inserted in the outflow side pipe of the heat consumption source. A ring-shaped temperature detecting unit for detecting a temperature, a flow rate detecting unit interposed in the inflow side pipe or the outflow side pipe and detecting a flow rate of a fluid flowing into or out of the heat consumption source, and the flow rate detecting unit. Obtained flow rate and before It is characterized in that a heat calculator for calculating the amount of heat consumed in the heat source consumption based on the temperature and obtained by the ring-shaped temperature detection unit.

[0014]

In the above structure, the flow rate of the fluid flowing into and out of the heat consumption source is detected by the flow rate detecting section inserted in the inflow side pipe or the outflow side pipe, and the inflow side pipe and the outflow side are detected. Each temperature of the fluid flowing in the inflow side pipe and the fluid flowing in the outflow side pipe is detected by each ring-shaped temperature detecting section inserted in each of the pipes, and based on the flow rate and each temperature by the calorific value calculating section. The amount of heat consumed by the heat consumption source is calculated.

[0015]

1 is a block diagram showing an example of a plant using an embodiment of a calorimeter according to the present invention.

In the plant shown in this figure, a pipe 1 for taking in a fluid such as cold water or hot water, a heat consumption source 2 that is heated or cooled by a fluid supplied through this pipe 1, and this heat consumption source A pipe 3 that guides the fluid that has passed through 2 to the outside, and a calorimeter 4 that measures the heat quantity difference (heat quantity consumed by the heat consumption source 2) between the fluids that flow in and out through these pipes 1 and 3. And heats and cools the heat consumption source 2 with the fluid supplied through the inflow side pipe 1, and the flow rate of each fluid flowing through each of the pipes 1 and 3 by the calorimeter 4. Calorie and
The amount of heat consumed by the heat consumption source 2 is measured based on these measurement results.

The calorimeter 4 is provided in the pipe 1 on the inflow side, and is provided in the temperature detecting unit 5 for measuring the temperature of the fluid flowing in the pipe 1 and the pipe 3 on the outflow side, and flows in the pipe 3. Electromagnetic flow meter 6 for measuring fluid flow rate and temperature
And a calorie calculator 7 that calculates a calorific value difference between the fluids flowing through the pipes 1 and 3 based on the outputs of the temperature detecting unit 5 and the electromagnetic flowmeter 6. The flow rate and the temperature of the fluid flowing in the pipe 3 are measured by 6 and the temperature of the fluid flowing in the pipe 1 is measured by the temperature detecting unit 5, and a calorie calculator 7 is used.
Calculates the amount of heat consumed by the heat consumption source 2 based on the measurement result of the electromagnetic flow meter 6 and the measurement result of the temperature detection unit 5, and outputs the calculation result to the outside.

As shown in FIG. 2, the electromagnetic flow meter 6 has the pipe 3
And a short cylindrical measuring tube 10 inserted in the cut portion of FIG.
As shown in FIG. 3, cylindrical electromagnet storage containers 11 and 12 are provided so as to face the outside of the measuring tube 10, a transmitter storage container 13 is provided in one of the electromagnet storage containers 11, and the electromagnet storage containers 11 are provided. 12 and electromagnets 14 and 15 for generating a magnetic field in the measuring tube 10 when the driving tube is supplied with a driving current, and the electromagnets 14 and 15 arranged to face the inside of the measuring tube 10. Two electrodes 16, 17 for detecting an electromotive voltage generated in the fluid flowing therein,
Each of the electrodes 1 is housed in the transmitter housing 13
A transmitter 18 that takes in the electromotive force obtained by 6 and 17 to generate a flow rate detection signal that indicates the flow rate of fluid, and a fluid that is provided at both ends of the measurement tube 10 and that has a ground potential to the fluid that flows in the measurement tube 10. Two earth rings 19 and 20 to give
And one earth ring 19 as shown in FIG. 4 and FIG.
A plurality of temperature sensors 21 configured by resistance temperature detectors or thermistors embedded in the inside, and a temperature detection signal housed in the transmitter housing 13 and taken in by the temperature detection signals obtained by the temperature sensors 21 to collect the fluid. And an arithmetic unit 22 for obtaining the average temperature.

When a driving current is supplied, a magnetic field is generated in the measuring tube 10 by the electromagnets 14 and 15, and a fluid is discharged from the heat consumption source 2 and passes through the measuring tube 10. , A flow rate detection signal indicating the flow rate of the fluid is output from the transmitter 18 based on the electromotive voltage generated in each electrode 16, 17 and is supplied to the calorie calculator 7 and embedded in the earth ring 19. Each temperature sensor 21 detects the temperature of the fluid to generate a temperature detection signal, which is averaged by the calculator 22 and supplied to the heat quantity calculator 7.

Further, the temperature detecting section 5 is a ring 25 inserted in the cut portion of the pipe 1 as shown in FIGS. 6 and 7.
And a plurality of temperature sensors 2 configured by a resistance temperature detector or a thermistor embedded in the ring 25.
6 and an arithmetic unit 2 for obtaining the average temperature of the fluid by taking in the temperature detection signals obtained by the respective temperature sensors 26.
7, a temperature sensor 26 embedded in the ring 25 detects the temperature of the fluid to generate a temperature detection signal, which is averaged by a calculator 27 and supplied to the heat quantity calculator 7. To do.

The calorific value calculator 7 is equipped with a plurality of calculators for performing various kinds of calculation processing, and the flow rate detection signal and the temperature detection signal output from the electromagnetic flow meter 6 and the temperature output from the temperature detection unit 5 are output. Based on the detection signal, the volume (flow rate) of the fluid passing through in a unit time and the temperature difference between the fluids flowing into and out of the heat consumption source 2 are obtained, and the calculation shown in the following equation is performed to calculate the heat consumption. Calculate the amount of heat consumed by Source 2.

Q = kQ (T1-T2) (2) where q: the amount of heat consumed by the heat consumption source 2 k: a preset coefficient Q: flows in and out of the heat consumption source 2 Volume of fluid T1: Temperature of fluid flowing out from heat consumption source 2 T2: Temperature of fluid flowing into heat consumption source 2 In this case, the temperature detection signal output from the electromagnetic flow meter 6 and the temperature detection unit 5 output Since the temperature detection signal generated is the average temperature of the fluids flowing in the pipes 1 and 3, even if the temperature distribution of the fluids flowing in the pipes 1 and 3 is uneven, the heat consumption source 2 The amount of heat consumed by can be accurately obtained.

As described above, in this embodiment, the temperature of the fluid flowing in each of the pipes 1 and 3 is constituted by the earth ring 19 having the plurality of temperature sensors 21 embedded therein and the ring 25 having the plurality of temperature sensors 26 embedded therein. Is detected, the temperature detection signals obtained by this detection operation are averaged, and the average temperature of the fluid flowing into the heat consumption source 2 and the heat consumption source 2
Since the average temperature of the fluid flowing out from the pipe is accurately measured, the temperature distribution of the fluid flowing in the pipes 1 and 3 is large, such as when the pipes 1 and 3 connected to the heat consumption source 2 have large diameters. Even when the heat consumption source 2 is non-uniform, the average temperature of each fluid flowing in and out of the heat consumption source 2 can be accurately measured, thereby accurately measuring the amount of heat consumed by the heat consumption source 2. can do.

FIG. 8 is a block diagram showing an example of a plant using another embodiment of the calorimeter according to the present invention.

The plant shown in this figure is different from the plant shown in FIG. 1 in that a normal electromagnetic flowmeter 30 is attached to the pipe 3 to detect only the flow rate, and the pipe 3 is the same as the temperature detecting section 5. That is, the temperature detecting unit 34 is provided and the temperature of the fluid flowing in the pipe 3 is detected by the temperature detecting unit 34.

Even in this case, the temperature of each portion of the fluid flowing in the pipe 3 is detected by the temperature detecting portion 34 provided in the pipe 3 and the temperature is averaged. Therefore, similar to the above-described embodiment. , Pipes 1 and 3 connected to the heat consumption source 2
Even if the temperature distribution of the fluid flowing through the pipes 1 and 3 is uneven, such as when the diameter of the fluid is large, the average temperature of each fluid flowing into and out of the heat consumption source 2 is accurately measured. Therefore, the amount of heat consumed by the heat consumption source 2 can be accurately measured.

Further, in the above-described embodiment, a plurality of temperature sensors 21 are provided in the earth ring 19 and the ring 25.
The temperature of the fluid flowing in each of the pipes 1 and 3 is measured by embedding 26 and the arithmetic units 22 and 27 are used to average the temperature. However, as shown in FIG. 9 and FIG.
Ring 35 which is inserted in the cut portion of 3 and this ring 3
Temperature resistance wire 36 wrapped around the inner surface of the wetted body 5 of 1 or more times
The temperature of the fluid flowing in each of the pipes 1 and 3 may be detected by using.

As a result, the resistance value of the temperature measuring resistance wire 36 itself corresponds to the average temperature of the fluid flowing in each of the pipes 1 and 3, so that an arithmetic unit for averaging the temperature detection signals is not required and the system is eliminated. The entire structure can be simplified.

[0029]

As described above, according to the present invention, even when the temperature distribution of the fluid flowing through the pipe is uneven, such as when the diameter of the pipe connected to the heat consumption source is large. The average temperature of each fluid flowing into and out of the heat consumption source can be accurately measured, and thus the amount of heat consumed by the heat consumption source can be accurately measured.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of a plant using an embodiment of a calorimeter according to the present invention.

FIG. 2 is a partially cut front view showing a detailed configuration example of the electromagnetic flow meter shown in FIG.

FIG. 3 is a side view showing a detailed configuration example of the electromagnetic flow meter shown in FIG.

FIG. 4 is a side view showing a detailed configuration example of an earth ring portion that constitutes the electromagnetic flow meter shown in FIG. 1.

5 is a front view showing a detailed configuration example of an earth ring portion constituting the electromagnetic flow meter shown in FIG. 1. FIG.

FIG. 6 is a side view showing a detailed configuration example of a temperature detection unit shown in FIG.

FIG. 7 is a front view showing a detailed configuration example of a temperature detection unit shown in FIG.

FIG. 8 is a block diagram showing an example of a plant using another embodiment of the calorimeter according to the present invention.

FIG. 9 is a side view showing another configuration example of the earth ring and the temperature detection unit of the electromagnetic flow meter used in the present invention.

FIG. 10 is a front view of the earth ring and the temperature detection unit shown in FIG.

FIG. 11 is a block diagram showing an example of a plant using a calorimeter for measuring the amount of heat of a fluid flowing in a pipe.

12 is a cross-sectional view in the piping direction showing a detailed configuration example of the temperature detection unit shown in FIG.

FIG. 13 is a cross-sectional view showing a detailed configuration example of the temperature detection unit shown in FIG. 11 in a direction perpendicular to the piping direction.

[Explanation of symbols] 1 piping (inflow side piping) 2 heat consumption source 3 piping (outflow side piping) 4 calorimeter 5 temperature detector (ring-shaped temperature detector) 6 electromagnetic flowmeter (flow rate detector) 7 calorie calculator (Heat amount calculation unit) 10 Measuring tube 12 Electromagnet storage container 13 Transmitter storage container 14, 15 Electromagnet 16, 17 Electrode 18 Transmitter 19 Earth ring (ring-shaped temperature detection unit) 20 Earth ring 21 Temperature sensor 22 Computing device 25 Ring 26 Temperature sensor 27 Computing device 35 Ring 36 Temperature measuring resistance wire (linear temperature sensor)

Claims (1)

[Claims] 1. A heat quantity for measuring the heat quantity consumed by the heat consumption source based on the temperature of the fluid flowing into the heat consumption source, the temperature of the fluid flowing out of the heat consumption source, and the flow rate of each of the fluids. In the meter, a ring-shaped temperature detection unit having a plurality of temperature sensors or linear temperature sensors inserted in the inflow side pipe of the heat consumption source, for detecting the average temperature of the fluid flowing in the inflow side pipe, A ring-shaped temperature detector having a plurality of temperature sensors or linear temperature sensors inserted in the outflow side pipe of the heat consumption source, and detecting the average temperature of the fluid flowing in the outflow side pipe, the inflow side pipe or A flow rate detection unit that is inserted in the outflow side pipe and detects the flow rate of the fluid flowing in or out of the heat consumption source, and the flow rate obtained by this flow rate detection unit and each of the ring-shaped temperature detection units. At each temperature Calorimeter being characterized in that and a heat calculator for calculating the amount of heat consumed in the heat source consumption Zui.