CN115326243A - Measurement system for heat dissipation power of general electronic equipment - Google Patents
Measurement system for heat dissipation power of general electronic equipment Download PDFInfo
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- CN115326243A CN115326243A CN202210916962.6A CN202210916962A CN115326243A CN 115326243 A CN115326243 A CN 115326243A CN 202210916962 A CN202210916962 A CN 202210916962A CN 115326243 A CN115326243 A CN 115326243A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K17/00—Measuring quantity of heat
- G01K17/06—Measuring quantity of heat conveyed by flowing media, e.g. in heating systems e.g. the quantity of heat in a transporting medium, delivered to or consumed in an expenditure device
- G01K17/08—Measuring quantity of heat conveyed by flowing media, e.g. in heating systems e.g. the quantity of heat in a transporting medium, delivered to or consumed in an expenditure device based upon measurement of temperature difference or of a temperature
- G01K17/10—Measuring quantity of heat conveyed by flowing media, e.g. in heating systems e.g. the quantity of heat in a transporting medium, delivered to or consumed in an expenditure device based upon measurement of temperature difference or of a temperature between an inlet and an outlet point, combined with measurement of rate of flow of the medium if such, by integration during a certain time-interval
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention discloses a measuring system for heat dissipation power of general electronic equipment, which comprises an air source part for providing clean, dry, constant-pressure, constant-current and constant-temperature compressed air, a measuring part for measuring the temperature of the measured electronic equipment in a closed heat-preservation cavity, and a data acquisition part for measuring the temperature of the compressed air at an inlet and an outlet of the cavity, the surface of the measured electronic equipment and the mass flow of the compressed air at the outlet of the cavity and performing centralized acquisition processing. According to the invention, electronic equipment in a normal working state is placed on a measuring part according to the heat dissipation power measurement requirement of general electronic equipment, firstly, the temperature, the pressure and the flow of compressed air entering the measuring part are ensured by a gas source part, then, the temperature of the compressed air at an inlet and an outlet of a closed heat-insulating cavity and the mass flow of the compressed air at the outlet are measured by a data acquisition part, and the heat dissipation power of the tested electronic equipment is calculated according to the specific heat capacity corresponding to the compressed air in an experiment. The measuring system can measure the heat dissipation power of different electronic devices under normal working conditions with high precision.
Description
Technical Field
The invention relates to the field of heat dissipation tests, in particular to a measuring system for heat dissipation power of general electronic equipment.
Background
With the development of high-performance electronic devices toward integration and miniaturization, the size and the structure of the high-performance electronic devices are becoming smaller and more complex, and the functions of the high-performance electronic devices are becoming more and more diversified, that is, the power density is becoming higher and higher. The heat management is more and more important, especially for high-precision electronic equipment, when the high-precision electronic equipment normally works, due to the high power density of the high-power heat management equipment, a large amount of heat can be emitted to the surrounding environment, and heat sensitive devices in the whole system can be influenced. However, an improper thermal management may result in unexpected system performance and even overall system failure. In order to further control the influence of the heat dissipation power of the electronic device on the surrounding heat-sensitive devices, a measurement system is urgently needed to measure the heat dissipated to the surrounding environment in the normal working state of the general electronic device with high precision.
Disclosure of Invention
The invention aims to provide a measuring system for the heat dissipation power of general electronic equipment under the conditions of smaller heat dissipation power and higher measurement precision requirement, which has the advantages of high measurement precision and wide application range.
In order to achieve the above purpose, the invention provides the following design scheme: the measuring system for the heat dissipation power of the universal electronic equipment is designed, the temperature of compressed air at an air inlet and an air outlet of a closed heat-preservation cavity in the measuring system and the mass flow of the compressed air at the outlet are measured, and then the heat dissipation power of the universal electronic equipment to be measured is calculated according to the specific heat capacity corresponding to the compressed air in an experiment.
The invention provides a measuring system for heat dissipation power of general electronic equipment, which comprises an air source part, a gas storage tank, a pressure regulating valve, a speed regulating valve, an air dryer, a gas turbine flowmeter, a high-precision gas-liquid heat exchanger, a temperature rise testing platform and an industrial water chiller, wherein the air source part is composed of a filter, an air compressor, a gas storage tank, a pressure regulating valve, a speed regulating valve, an air dryer, a gas turbine flowmeter, a high-precision gas-liquid heat exchanger, a temperature rise testing platform and an industrial water chiller, and clean, dry, constant-pressure, constant-current and constant-temperature compressed air is provided for a subsequent measuring part.
The invention provides a measuring system for heat dissipation power of general electronic equipment, which comprises a measuring part and a measuring part, wherein the measuring part consists of a direct current stabilized voltage power supply, the electronic equipment to be measured and a closed heat preservation cavity, the closed heat preservation cavity provides a closed heat preservation environment required by measurement, and an industrial water cooler is deionized water with constant temperature and constant current of a high-precision gas-liquid heat exchanger in an air source part.
The invention provides a measuring system of general electronic equipment, wherein a data acquisition part of the measuring system consists of a high-precision thermal mass flow meter, a plurality of high-precision temperature sensors and a multi-channel high-precision acquisition device, wherein the high-precision thermal mass flow meter is used for measuring the mass flow of compressed air at the outlet of a closed heat-preservation cavity
The high-precision temperature sensors are arranged at the air inlet and the air outlet of the sealed heat-insulating cavity and on the surface of the tested general electronic equipment, the number of the temperature sensors arranged at the air inlet and the air outlet of the sealed heat-insulating tank body is 3, the temperature sensors are uniformly arranged, and the temperature T of the compressed air at the air inlet is respectively measured 1 And the temperature T of the compressed air at the air outlet 2 (ii) a The temperature sensors arranged on the surface of the tested universal electronic equipment are uniformly arranged, and the number of the temperature sensors is determined by the structure and the size of the tested universal electronic equipment.
The invention provides a measuring system for heat dissipation power of general electronic equipment, which has a heat dissipation rate calculation formula as follows:
wherein: c P Is the constant pressure specific heat capacity of air;
T 2 the average temperature of the air at the outlet of the closed heat-preservation tank body;
T 1 is the average temperature of the air at the inlet of the closed insulation tank.
Drawings
FIG. 1 is a schematic diagram of the connection of the present invention;
in the figure: the system comprises a filter 1, an air compressor 2, an air storage tank 3, a pressure regulating valve 4, a speed regulating valve 5, an air dryer 6, a gas turbine flowmeter 7, a high-precision gas-liquid heat exchanger 8, a temperature rise test platform 9, an industrial water chiller 10, a direct-current stabilized power supply 11, a tested electronic device 12, a closed heat insulation cavity 13, a high-precision thermal mass flowmeter 14, a high-precision temperature sensor 15 and a multi-channel high-precision collector 16
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
the measuring system consists of an air source part, a measuring part and a data acquisition part, wherein the air source part comprises a filter 1, an air compressor 2, an air storage tank 3, a pressure regulating valve 4, a speed regulating valve 5, an air dryer 6, a gas turbine flowmeter 7, a high-precision gas-liquid heat exchanger 8, a temperature rise testing platform 9 and an industrial water cooler 10, and the air source part, the air compressor 2, the air storage tank 3, the pressure regulating valve 4, the speed regulating valve 5, the air dryer 6, the industrial water cooler 10 are connected with one another by hard PU pipes or metal corrugated pipes; the measuring part comprises a direct current stabilized power supply 11, electronic equipment to be measured 12 and a closed heat preservation cavity 13; the data acquisition part comprises a high-precision thermal mass flow meter 14, a plurality of high-precision temperature sensors 15 arranged at the inlet and the outlet of the closed heat-preservation cavity 13 and the surface of the tested general electronic equipment, and a multi-channel high-precision acquisition device 16.
The specific measurement process of the measurement system is as follows:
before measurement starts, determining the surface average temperature value of the tested universal electronic equipment when the tested universal electronic equipment works normally; establishing a simulation model of a closed heat-preservation cavity and the tested universal electronic equipment, performing numerical simulation by using a direct-current stabilized voltage power supply to give the normal working power of the tested universal electronic equipment as a known condition and using the heat insulation of the closed heat-preservation cavity as a boundary condition, and determining the volume flow of cooling air required for cooling the surface average temperature of the tested universal electronic equipment to be consistent with the plane average temperature of the tested universal electronic equipment in a normal working state;
after the average surface temperature value and the volume flow of the cooling air needed to be measured of the universal electronic equipment are determined, the experimental measurement is started:
firstly, placing the tested general electronic equipment into a closed heat-insulating cavity 13, connecting a power line of the tested general electronic equipment with a high-precision temperature sensor arranged on the surface of the tested general electronic equipment, and then checking the sealing property of the whole system;
after the tightness of the whole measuring system is ensured, the air compressor 2 and the industrial water chiller 10 are opened, so that air in the environment enters the air compressor through the filter 1, is stored in the air storage tank 3 at a certain pressure, and the conditions that the use pressure of the air compressor 2 is constant and the deionized water in the industrial water chiller 10 reaches a preset temperature value are waited;
opening a valve of a gas outlet of a gas storage tank 3, allowing compressed air output from the gas storage tank 3 to enter a gas turbine flowmeter 7 through a pressure regulating valve 4, a speed regulating valve 5 and an air dryer 6, and monitoring whether the compressed air is regulated to a pressure value and a flow value determined in simulation by the pressure regulating valve 4 and the speed regulating valve 5;
the compressed air with the determined pressure value and flow value can exchange heat in the high-precision gas-liquid heat exchanger 8 and the constant-temperature deionized water from the water chiller 10 with the pressure and flow well regulated by monitoring through the temperature rise test platform 9, so that the compressed air entering the closed constant-temperature cavity 13 can reach clean, dry, constant-pressure, constant-current and constant-temperature compressed air, and the heat balance is achieved in the closed constant-temperature cavity 13;
using a direct current stabilized voltage power supply 11 to supply power to the tested universal electronic equipment 12 during normal operation, and continuously observing the average value of the temperature measured by the high-precision temperature sensor 15 on the surface of the tested universal electronic equipment 12; when the value is stable, the value is compared with the surface average temperature value of the tested universal electronic equipment in the normal working state determined before the experiment, and if the measured value is smaller than the determined value before the experiment, the speed regulating valve 5 is correspondingly regulated to reduce the air flow provided by the air source part; if the measured value is larger than the determined value before the experiment, the speed regulating valve 5 is correspondingly regulated to increase the air flow provided by the air source part; after the average temperature value of the measured surface to be measured is stable after adjustment, comparing again, and carrying out corresponding air flow adjustment until the two average temperature values are consistent;
after the measured average temperature value of the surface of the universal electronic equipment to be measured is consistent with the determined value before the experiment, the average temperature value T measured by the high-precision temperature sensor 15 at the inlet and the outlet of the closed heat-preserving cavity 13 and displayed on the multi-channel high-precision acquisition card 16 is recorded 1 、T 2 And the mass flow of the compressed air at the outlet of the closed heat-preservation cavity 13 measured by a high-precision thermal mass flowmeter 14
And calculating the heat dissipation rate of the tested universal electronic device 12 according to the following formula:
wherein: c P Is the constant pressure specific heat capacity of air;
T 2 is the average temperature of the air at the outlet of the closed heat-insulating tank body;
T 1 the average temperature of the air at the inlet of the closed heat-preservation tank body is obtained.
Claims (7)
1. The system for measuring the heat dissipation power of the universal electronic equipment consists of an air source part, a measuring part and a data acquisition part. The heat dissipation power of the electronic equipment is calculated by measuring the temperature of compressed air at the inlet and outlet of the closed heat preservation cavity in which the electronic equipment to be tested is placed under a normal working state and the mass flow of the compressed air at the outlet.
2. The system for measuring the heat dissipation power of the universal electronic equipment as claimed in claim 1, wherein the air source part comprises a filter, an air compressor, an air storage tank, a pressure regulating valve, a speed regulating valve, an air dryer, a gas turbine flowmeter, a high-precision gas-liquid heat exchanger, a temperature rise test platform and an industrial water chiller, and clean, dry, constant-pressure, constant-current and constant-temperature compressed air is provided for a subsequent measurement part.
3. The system for measuring the heat dissipation power of the universal electronic equipment as claimed in claim 1, wherein the measuring part is composed of a direct current stabilized power supply, the universal electronic equipment to be measured and a closed heat preservation measuring cavity.
4. The system for measuring the heat dissipation power of the universal electronic device as recited in claim 1, wherein the data acquisition part comprises a high-precision thermal mass flow meter, a plurality of high-precision temperature sensors and a multi-channel high-precision collector.
5. The system for measuring the heat dissipation power of the universal electronic device as claimed in claim 2, wherein the filter in the air source part is used to filter out impurities such as oil, water and dust in the compressed air, so as to provide clean and impurity-free air for the subsequent air compressor, thereby facilitating data measurement and processing; the air compressor in the air source part is an ultra-silent oilless air compressor, can meet indoor use and provides compressed air required by measurement; the gas storage tank in the gas source part is used for storing gas and has the function of stabilizing the pressure of the system. The compressed air deposits accumulated water in the air storage tank, the air pressure fluctuation of pneumatic equipment caused by unbalanced air consumption is adjusted, the pressure stability of the pneumatic equipment is increased, or a part of compressed air is stored, and when the air compressor fails, the part of compressed air is used for emergency treatment of the pneumatic equipment or a pneumatic control system; the pressure regulating valve in the air source part is used for regulating the pressure of compressed air entering the closed heat insulation cavity and providing the compressed air with certain pressure required by the subsequent measurement part; the speed regulating valve in the air source part is used for regulating the pressure of compressed air entering the closed heat-insulating cavity and providing the compressed air with a certain flow required by the subsequent measurement part; the air dryer in the air source part is used for absorbing liquid gas such as water vapor and the like generated by air compression and expansion, providing dry compressed air for subsequent measurement and facilitating acquisition and processing of subsequent data; the gas turbine flowmeter in the gas source part is used for measuring the volume flow of the compressed air provided by the gas source part for the measuring part and providing a reference for regulating the flow of the compressed air; the high-precision gas-liquid heat exchanger in the gas source part exchanges heat between deionized water from a water cooler and compressed air from a gas turbine flowmeter, so that the temperature of the compressed air input from the front end and the temperature of the deionized water are controlled to be +/-0.01 ℃; the temperature rise test platform in the gas source part is used for controlling and monitoring the pressure and flow of the deionized water led to the high-precision gas-liquid heat exchanger and providing the deionized water with constant pressure and constant flow for the high-precision gas-liquid heat exchanger; the industrial water chiller in the gas source part provides deionized water with constant temperature for the high-precision gas-liquid heat exchanger, and the precision can be guaranteed to be +/-0.1 ℃.
6. The system for measuring the heat dissipation power of the universal electromechanical device according to claim 3, wherein the DC voltage-stabilized power supply in the measuring part is used for supplying the same current and voltage to the electromechanical device to be measured as the electromechanical device to be measured in normal operation; the tested general electromechanical equipment in the measuring part generally refers to mechanical equipment, electric equipment and electric automation equipment; the sealed heat-insulating cavity in the measuring part is cylindrical on the whole and mainly comprises two heat-insulating layers, the inner layer is vacuumized, and the outer layer is filled with heat-insulating materials (comprising polyurethane, EPS, XPS and other materials) so as to ensure that the tank body is in a heat-insulating state under the closed condition.
7. The system for measuring the heat dissipation power of the universal electronic device as recited in claim 4, wherein the high-precision thermal mass flow meter in the data collection portion is a flow meter for measuring the mass flow of the fluid by using the temperature field variation generated when the fluid flows through the pipeline heated by the external heat source, or by using the relationship between the energy required for the temperature of the fluid to rise to a certain value when the fluid is heated and the mass of the fluid, and the high-precision thermal mass flow meter should have a certain distance from the outlet of the closed thermal insulation cavity to avoid influencing the precision of the temperature measured by the temperature sensor at the outlet due to the working principle; high-precision temperature sensors in the data acquisition part are respectively arranged at an inlet and an outlet of the closed heat-preservation cavity and the surface of the tested general electronic equipment, the number of the high-precision temperature sensors arranged on the surface of the tested general electronic equipment is determined by the specific structure and size of the tested general electronic equipment, and the precision can reach +/-0.01 ℃; the multi-channel high-precision collector in the data collection part is used for collecting temperature data on the plurality of high-precision temperature sensors, is used for drawing a temperature-time curve better, is convenient for judging the stability of the system, and can collect temperature data with the precision of +/-0.01 ℃.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210780433 | 2022-07-04 | ||
| CN2022107804338 | 2022-07-04 |
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| Publication Number | Publication Date |
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| CN115326243A true CN115326243A (en) | 2022-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210916962.6A Pending CN115326243A (en) | 2022-07-04 | 2022-08-01 | Measurement system for heat dissipation power of general electronic equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024036652A1 (en) * | 2022-08-16 | 2024-02-22 | 北京华卓精科科技股份有限公司 | Apparatus for measuring heat dissipation of liquid-cooling device |
| CN118468761A (en) * | 2024-07-10 | 2024-08-09 | 中国电建集团西北勘测设计研究院有限公司 | Method for calculating volume of energy storage tank body of compressed air energy storage system and application |
-
2022
- 2022-08-01 CN CN202210916962.6A patent/CN115326243A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024036652A1 (en) * | 2022-08-16 | 2024-02-22 | 北京华卓精科科技股份有限公司 | Apparatus for measuring heat dissipation of liquid-cooling device |
| CN118468761A (en) * | 2024-07-10 | 2024-08-09 | 中国电建集团西北勘测设计研究院有限公司 | Method for calculating volume of energy storage tank body of compressed air energy storage system and application |
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