CN115597898A - Heat load device for testing heat exchange coefficient of plate heat exchanger and testing method thereof - Google Patents
Heat load device for testing heat exchange coefficient of plate heat exchanger and testing method thereof Download PDFInfo
- Publication number
- CN115597898A CN115597898A CN202211242525.7A CN202211242525A CN115597898A CN 115597898 A CN115597898 A CN 115597898A CN 202211242525 A CN202211242525 A CN 202211242525A CN 115597898 A CN115597898 A CN 115597898A
- Authority
- CN
- China
- Prior art keywords
- heat
- circulation pipeline
- heat exchanger
- fluid medium
- pipeline system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
Abstract
The invention discloses a heat load device for testing heat exchange coefficient of a plate heat exchanger and a testing method thereof, wherein the device comprises: the system comprises a heat production device, an internal circulation pipeline system, an external circulation pipeline system and a heat dissipation device; the heat production device, the internal circulation pipeline system, the plate heat exchanger to be tested, the external circulation pipeline system and the heat dissipation device are sequentially connected; the plate heat exchanger to be tested is provided with two hot side interfaces and two cold side interfaces; the internal circulation pipeline system is connected into two hot side interfaces of the plate heat exchanger to be tested, and the external circulation pipeline system is connected into two cold side interfaces of the plate heat exchanger to be tested. The invention can simulate the use condition of an engineering field to test the heat exchange performance of the plate heat exchanger before leaving a factory, and ensure that the heat exchange capacity of the plate heat exchanger meets the design requirement.
Description
Technical Field
The invention relates to the technical field of frequency converter testing, in particular to a heat load device for testing the heat exchange coefficient of a plate heat exchanger and a testing method thereof.
Background
With the overall advance of basic construction in China, particularly the construction of basic facilities such as high-speed rails, subways and highways, the application of shield tunnel boring machines is more and more common. The water-cooling frequency conversion device has the advantages of enabling the cutter head motor to run stably without impact, being in place slowly, prolonging the service life, improving the safety of the motor and the like, and the application of the water-cooling frequency conversion device on the shield tunnel boring machine is promoted to be more and more popular.
At present, the assembled water-cooling frequency conversion device is generally tested before leaving the factory, the core component of the water-cooling heat transfer device is a plate heat exchanger, the plate heat exchanger is a theoretical calculation value when the design and the selection are carried out, and a testing device for the plate heat exchanger is lacked before assembly, so that if the water-cooling frequency conversion device is unqualified in test, the disassembly and analysis are needed, and time and labor are wasted. Therefore, it is necessary to test the heat exchange coefficient of the core component plate heat exchanger in advance when designing the shield water-cooling frequency conversion device, and to avoid that the heat exchange capacity of the equipment can not meet the design requirements in the actual operation process at the later stage.
Disclosure of Invention
In view of this, the invention provides a heat load device for testing a heat exchange coefficient of a plate heat exchanger and a testing method thereof, which can simulate the use condition of an engineering field to test the heat exchange performance of the plate heat exchanger before leaving a factory, and ensure that the heat exchange capability of the plate heat exchanger meets the design requirement.
In order to achieve the purpose, the invention adopts the following technical scheme:
a heat load device for testing the heat exchange coefficient of a plate heat exchanger comprises: the system comprises a heat production device, an internal circulation pipeline system, an external circulation pipeline system and a heat dissipation device; the heat production device, the internal circulation pipeline system, the plate heat exchanger to be tested, the external circulation pipeline system and the heat dissipation device are sequentially connected; the plate heat exchanger to be tested is provided with two hot side interfaces and two cold side interfaces; the internal circulation pipeline system is connected into two hot side interfaces of the plate heat exchanger to be tested, and the external circulation pipeline system is connected into two cold side interfaces of the plate heat exchanger to be tested;
the heat generating device is used for heating the fluid medium in the internal circulation pipeline system; the plate heat exchanger to be tested is used for exchanging heat between the fluid medium of the internal circulation pipeline system and the fluid medium of the external circulation pipeline system; the internal circulation pipeline system and the external circulation pipeline system are respectively used for monitoring related parameters of the fluid medium before and after heat exchange; the heat dissipation device is used for dissipating heat of fluid media in the external circulation pipeline system.
Further, the internal circulation pipe system includes: the system comprises an internal circulation pipeline, and an internal circulation water pump, an internal circulation water supply thermometer, an internal circulation water return thermometer and an internal circulation flowmeter which are arranged on the internal circulation pipeline; the internal circulation pipeline is of a closed structure; the two hot side interfaces of the plate heat exchanger to be tested are respectively a hot side water supply interface and a hot side water return interface; the internal circulation water supply thermometer is arranged close to the hot side water supply interface; the internal circulation return water thermometer is installed close to the hot side return water interface.
Further, the external circulation pipe system includes: the system comprises an external circulation pipeline, and an external circulation water pump, an external circulation water supply thermometer, an external circulation water return thermometer and an external circulation flowmeter which are arranged on the external circulation pipeline; the two cold side interfaces of the plate heat exchanger to be tested are respectively a cold side water supply interface and a cold side water return interface; the external circulation water supply thermometer is installed close to the cold side water supply interface, and the external circulation water return thermometer is installed close to the cold side water return interface; the outer circulation pipeline is of an open structure, and the open end of the outer circulation pipeline is connected into the heat dissipation device.
Furthermore, the heat dissipation device comprises a cooling tower, a spray head and a cooling fan; the open ends of the external circulation pipeline are respectively a water supply end and a water return end, the water supply end of the external circulation pipeline extends into the fluid medium in the cooling tower, and the water return end is provided with the spray head; the cooling fan is arranged close to the spray head and used for evaporating and radiating fluid media sprayed by the spray head.
Further, the heat generating device comprises a plurality of electric heat generating devices.
The invention also provides a test method of the heat load device for testing the heat exchange coefficient of the plate heat exchanger, which comprises the following steps:
calculating heat generation power of the heat generation device by heat according to the theory of the plate heat exchanger to be measured;
when the heat of the heat generating device, the heat exchange device and the heat dissipation device is in a relative balance state, collecting multiple groups of related parameters of fluid media in the internal circulation pipeline system and the external circulation pipeline system at preset time intervals;
and calculating the heat exchange coefficient of the plate heat exchanger to be measured according to the average value of the related parameters of the multiple groups of fluid media.
8. Further, the calculation formula of the heat exchange coefficient of the plate heat exchanger to be measured is as follows:
Q 1 ＝C 1 ·q m1 ·ΔT m1 ＝C 1 ·ρ 1 ·F 25 ·(T 23 -T 24 )
Q 2 ＝C 2 ·q m2 ·ΔT m2 ＝C 2 ·ρ 2 ·F 45 ·(T 44 -T 43 )
Q 1 ＝Q 2 ＝Q 3
wherein Q 1 For the heat production of heat-producing devices, Q 2 For the heat-dissipating capacity of the heat-dissipating device, Q 3 The heat exchange quantity of the plate heat exchanger to be measured is obtained; c 1 Is the specific heat capacity of the internally circulating fluid medium, q m1 Is the mass flow, Δ T, of the internally circulating fluid medium m1 Temperature difference, rho, between supply and return of fluid medium for internal circulation 1 Density of the internal circulating fluid medium, F 25 For the flow rate of the internally circulating fluid medium, T 23 Temperature, T, of the supply of the internally circulating fluid medium 24 The return temperature of the internal circulation fluid medium; c 2 Q is the specific heat capacity of the externally circulating fluid medium m2 For the mass flow of the externally circulating fluid medium, Δ T m2 Temperature difference, rho, between supply and return of externally circulating fluid medium 2 Density of the externally circulating fluid medium, F 45 For the flow of the externally circulating fluid medium, T 43 For supply temperature, T, of externally circulating fluid medium 44 The temperature of the return liquid of the externally circulating fluid medium; delta T m3 Is the log mean temperature difference; k is the heat exchange coefficient, f is a correction factor, and A is the heat exchange area of the plate heat exchanger.
According to the technical scheme, compared with the prior art, the heat load device for testing the heat exchange coefficient of the plate heat exchanger is provided, the heat exchange coefficient of the plate heat exchanger is tested in advance by simulating the use working condition of a project site before products leave a factory, so that the heat exchange capacity of the plate heat exchanger can meet the design requirement, and the situation that a water-cooled frequency converter sends a high-temperature signal (early warning) and even possibly sends a trip signal (stop) due to the fact that the heat exchange capacity of equipment does not meet the design requirement in the actual operation process at the later stage is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a heat load device for testing a heat exchange coefficient of a plate heat exchanger provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, an embodiment of the present invention discloses a thermal load device for testing a heat exchange coefficient of a plate heat exchanger, including: the system comprises a heat generating device 1, an internal circulation pipeline system 2, an external circulation pipeline system 4 and a heat radiating device 5; the heat production device 1, the internal circulation pipeline system 2, the plate heat exchanger 3 to be tested, the external circulation pipeline system 4 and the heat dissipation device 5 are sequentially connected; the plate heat exchanger 3 to be tested is provided with two hot side interfaces and two cold side interfaces; the internal circulation pipeline system 2 is connected to two hot side interfaces of the plate heat exchanger 3 to be tested, and the external circulation pipeline system 4 is connected to two cold side interfaces of the plate heat exchanger 3 to be tested;
the heat generating device 1 is used for heating fluid medium in the internal circulation pipeline system 2; the plate heat exchanger 3 to be tested is used for exchanging heat between the fluid medium of the internal circulation pipeline system 2 and the fluid medium of the external circulation pipeline system 4; the internal circulation pipeline system 2 and the external circulation pipeline system 4 are respectively used for monitoring related parameters of fluid media before and after heat exchange; the heat sink 5 is used for dissipating heat of the fluid medium in the external circulation pipe system 4.
Wherein the heat generating device 1 comprises a plurality of electric heating means 6. The electric heating device 6 with rated power continuously outputs heat, the heat is transferred to the plate heat exchanger 3 to be tested through the internal circulation fluid medium of the internal circulation pipeline system 2 (primary heat exchange equipment), the heat on the plate heat exchanger 3 is transferred to the heat dissipation device 5 to be tested through the external circulation fluid medium of the external circulation pipeline system 4 (secondary heat exchange equipment), and finally the heat dissipation device 5 is started to perform evaporation heat dissipation.
In one embodiment, the internal circulation pipe system 2 includes: the system comprises an internal circulation pipeline 21, and an internal circulation water pump 22, an internal circulation water supply thermometer 23, an internal circulation water return thermometer 24 and an internal circulation flowmeter 25 which are arranged on the internal circulation pipeline 21; the internal circulation pipeline 21 is of a closed structure; the two hot side interfaces of the plate heat exchanger 3 to be tested are respectively a hot side water supply interface and a hot side water return interface; the internal circulation water supply thermometer 23 is installed near the hot side water supply interface; an internal circulation return water thermometer 24 is mounted near the hot side return water connection.
In one embodiment, the external circulation pipe system 4 includes: an external circulation pipeline 41, and an external circulation water pump 42, an external circulation water supply thermometer 43, an external circulation water return thermometer 44 and an external circulation flow meter 45 which are installed on the external circulation pipeline 41; the two cold side interfaces of the plate heat exchanger 3 to be tested are respectively a cold side water supply interface and a cold side water return interface; an external circulation water supply thermometer 43 is installed close to the cold side water supply connector, and an external circulation water return thermometer 44 is installed close to the cold side water return connector; the outer circulation pipe 41 has an open structure, and an open end thereof is connected to the heat sink 5.
In the embodiment of the present invention, when the inner and outer circulation pipeline systems are circulating (connected by a pipeline, and the flowing direction of the fluid medium is the same as the arrow direction on the corresponding pipeline in fig. 1), the fluid medium (such as water) of the inner circulation pipeline system 2 (primary heat exchange equipment) and the fluid medium of the outer circulation pipeline system 4 (secondary heat exchange equipment) require a large difference (the former is a closed circulation system which is not communicated with the atmosphere and is not easily polluted, and the latter is an open circulation system which is communicated with the atmosphere and is easily polluted), and is separated by the multilayer plates of the plate heat exchanger 3 to be measured, wherein the power source of the inner circulation pipeline system 2 (primary heat exchange equipment) is the inner circulation water pump 22, when the inner circulation pipeline system 2 (primary heat exchange equipment) works, the heat generated by the electric heating device 6 arranged on the heat generating device is brought to the plate heat exchanger 3, the power source of the outer circulation pipeline system 4 (secondary heat exchange equipment) is the outer circulation water pump 42, and when the outer circulation pipeline system 4 (secondary heat exchange equipment) works, the heat on the plate heat exchanger 3 to be measured is brought to the heat dissipating heat in the heat dissipating device 5 for evaporation.
In one embodiment, the heat sink 5 includes a cooling tower 51, a spray head 52, and a cooling fan 53; the open ends of the external circulation pipeline 41 are respectively a water supply end and a water return end, the water supply end extends into the fluid medium in the cooling tower 51, and the water return end is provided with a spray head 52; the cooling fan 53 is installed near the nozzle and is used for evaporating and dissipating heat of the fluid medium sprayed from the nozzle.
In the embodiment of the invention, the water supply end of the open end of the external circulation pipeline 41 extends into the cooling fluid medium in the cooling tower 51, the plate heat exchanger 3 to be tested performs heat exchange between the cooling fluid medium and the fluid in the internal circulation pipeline 21 to take away heat in the internal circulation pipeline 21, then the fluid medium after heat exchange is sprayed out through the spray head 52 at the water return end, and the sprayed fluid medium is cooled through the cooling fan 53, so as to achieve the purpose of reducing the temperature of the spraying water of the cooling tower.
When the heat of the whole heat load device keeps a balance state, the heat exchange coefficient can be tested by 6 detection instruments including an internal circulation water supply thermometer 23, an internal circulation water return thermometer 24 and an internal circulation flow meter 25 of the internal circulation pipeline system 2 (primary heat exchange equipment), and an external circulation water supply thermometer 43, an external circulation water return thermometer 44 and an external circulation flow meter 45 of the external circulation pipeline system 4 (secondary heat exchange equipment).
Aiming at the problem, the invention also provides a method for testing the heat load device for testing the heat exchange coefficient of the plate heat exchanger, which comprises the following steps:
calculating heat generation power of the heat generation device by heat according to the theory of the plate heat exchanger to be measured;
when the heat of the heat generating device, the heat exchange device and the heat dissipation device is in a relative balance state, collecting multiple groups of related parameters of fluid media in the internal circulation pipeline system and the external circulation pipeline system at preset time intervals;
and calculating the heat exchange coefficient of the plate heat exchanger to be measured according to the average value of the multiple groups of related parameters of the fluid medium.
The above steps are further described below.
1. And (3) checking a heat load device (such as a circuit, a water path, a pipe interface of the plate heat exchanger to be detected and the like) before starting.
2. The internal circulation water pump 22 on the internal circulation pipe system 2, the external circulation water pump 42 on the external circulation pipe system 4 and the cooling fan 53 on the heat sink 5 are started.
3. The corresponding flow is output according to the theoretical calculation flow requirement of the plate heat exchanger 3 to be measured (the flow range can be adjusted by frequency conversion of a frequency converter of a water pump motor, for example, the range is 0.001-0.01 m 3 In s), that is, the internal circulation flow meter 25 in the internal circulation line system 2 and the internal circulation flow meter 45 in the external circulation line system 4 are checked, and the flow rates of the two flow meters are adjusted to be different as much as possible (typically, the difference is 10 to 30%).
4. OpenerThe electric heating devices 6 on the dynamic heat generating device 1 (which combination is determined according to the theoretical calculation heat of the plate heat exchanger 3 to be measured, for example, 6 groups of electric heating devices with heat generating power of 10 × 10 respectively 3 W、10×10 3 W、20×10 3 W、20×10 3 W、50×10 3 W and 50X 10 3 W, if the theoretical calculation heat production power requirement is 100 x 10 3 W, then different permutation combinations are possible, e.g. 50X 10 3 +50×10 3 、50×10 3 +20×10 3 +20×10 3 +10×10 3 And can be started according to actual conditions).
5. After the heat load device operates stably (the process from starting to stable operation generally takes 600s, and at this time, the heat of the heat generating device, the heat exchange device and the heat dissipation device is in a balanced state relatively), data on 6 detection instruments are collected at the same time at intervals (generally, the interval is 100, 200s, and generally, the process takes 600 s), namely, an internal circulation water supply thermometer 23 (T23), an internal circulation water return thermometer 24 (T24), an internal circulation flow meter 25 (F25) on the internal circulation pipeline system 2, an external circulation water supply thermometer 43 (T43), an external circulation water return thermometer 44 (T44) and an external circulation flow meter 45 (F45) on the external circulation pipeline system 4, and generally, 3-5 groups of data are collected (arithmetic mean value is taken) so that the arithmetic mean value of the relevant collected data is substituted into formulas (1) - (5) for calculation, and finally, the heat exchange coefficient K of the plate heat exchanger 3 to be measured is obtained.
6. The thermal load device is restored after shutdown (initialization state).
The calculation formula of the heat exchange coefficient of the plate heat exchanger to be measured is as follows:
Q 1 ＝C 1 ·q m1 ·ΔT m1 ＝C 1 ·ρ 1 ·F 25 ·(T 23 -T 24 ) (1)
Q 2 ＝C 2 ·q m2 ·ΔT m2 ＝C 2 ·ρ 2 ·F 45 ·(T 44 -T 43 ) (2)
Q 1 ＝Q 2 ＝Q 3 (3)
wherein Q is 1 For the heat production of heat-producing devices, Q 2 For the heat-dissipating capacity of the heat-dissipating device, Q 3 The unit of the heat exchange quantity of the plate heat exchanger to be measured is watt (W); c 1 Is the specific heat capacity of the internal circulating fluid medium in joules per kilogram kelvin (J/(kg · K)); q. q.s m1 Mass flow rate of the internal circulation fluid medium, unit is kilogram per second (kg/s); delta T m1 The temperature difference of liquid supply and liquid return of the internal circulation fluid medium is expressed in Kelvin (K); rho 1 The density of the internally circulating fluid medium is expressed in kilograms per cubic meter (kg/m) 3 )，F 25 Is the flow rate of the internal circulation fluid medium and has the unit of cubic meter per second (m) 3 /s)；T 23 The temperature of the liquid supply of the internal circulation fluid medium is expressed in units of Kelvin (K), T 24 Is the return temperature of the internal circulation fluid medium, and the unit is Kelvin (K); c 2 Is the specific heat capacity joules per kilogram of kelvin (J/(kg · K)) of the externally circulating fluid medium; q. q of m2 In kilograms per second (kg/s) of mass flow of the externally circulating fluid medium; delta T m2 The temperature difference of the liquid supply and the liquid return of the external circulation fluid medium is expressed in the unit of Kelvin (K); rho 2 Is the density unit of the externally circulating fluid medium in kilograms per cubic meter (kg/m) 3 )；F 45 Is the flow rate of the externally circulating fluid medium and has the unit of cubic meter per second (m) 3 /s)；T 43 Is the feed liquid temperature of the externally circulating fluid medium, and has the unit of Kelvin (K); t is 44 Is the return temperature of the externally circulating fluid medium in kelvin (K); delta T m3 Is the log mean temperature difference in kelvin (K); k is the heat transfer coefficient in units of watts per square meter Kelvin (W/(m) 2 K)); f is a correction factor without dimensional quantity, and 1 is taken here; a is the heat exchange area of the plate heat exchanger, and the unit is square meter (m) 2 )。
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed in the embodiment corresponds to the method disclosed in the embodiment, so that the description is simple, and the relevant points can be referred to the description of the method part.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A heat load device for testing the heat exchange coefficient of a plate heat exchanger is characterized by comprising: the system comprises a heat production device, an internal circulation pipeline system, an external circulation pipeline system and a heat dissipation device; the heat production device, the internal circulation pipeline system, the plate heat exchanger to be tested, the external circulation pipeline system and the heat dissipation device are sequentially connected; the plate heat exchanger to be tested is provided with two hot side interfaces and two cold side interfaces; the internal circulation pipeline system is connected into two hot side interfaces of the plate heat exchanger to be tested, and the external circulation pipeline system is connected into two cold side interfaces of the plate heat exchanger to be tested;
the heat generating device is used for heating the fluid medium in the internal circulation pipeline system; the plate heat exchanger to be tested is used for exchanging heat between the fluid medium of the internal circulation pipeline system and the fluid medium of the external circulation pipeline system; the internal circulation pipeline system and the external circulation pipeline system are respectively used for monitoring related parameters of the fluid medium before and after heat exchange; the heat dissipation device is used for dissipating heat of fluid media in the external circulation pipeline system.
2. The heat load device for testing the heat exchange coefficient of the plate heat exchanger according to claim 1, wherein the internal circulation pipeline system comprises: the system comprises an internal circulation pipeline, and an internal circulation water pump, an internal circulation water supply thermometer, an internal circulation water return thermometer and an internal circulation flowmeter which are arranged on the internal circulation pipeline; the internal circulation pipeline is of a closed structure; the two hot side interfaces of the plate heat exchanger to be tested are respectively a hot side water supply interface and a hot side water return interface; the internal circulation water supply thermometer is arranged close to the hot side water supply interface; the internal circulation return water thermometer is installed close to the hot side return water interface.
3. The heat load device for testing the heat exchange coefficient of the plate heat exchanger according to claim 1, wherein the external circulation pipeline system comprises: the system comprises an external circulation pipeline, and an external circulation water pump, an external circulation water supply thermometer, an external circulation water return thermometer and an external circulation flowmeter which are arranged on the external circulation pipeline; the two cold side interfaces of the plate heat exchanger to be tested are respectively a cold side water supply interface and a cold side water return interface; the external circulation water supply thermometer is installed close to the cold side water supply connector, and the external circulation water return thermometer is installed close to the cold side water return connector; the outer circulation pipeline is of an open structure, and the open end of the outer circulation pipeline is connected into the heat dissipation device.
4. The heat load device for testing the heat exchange coefficient of the plate heat exchanger according to claim 3, wherein the heat dissipation device comprises a cooling tower, a spray head and a cooling fan; the open ends of the external circulation pipeline are respectively a water supply end and a water return end, the water supply end of the external circulation pipeline extends into the fluid medium in the cooling tower, and the water return end is provided with the spray head; the cooling fan is arranged close to the spray head and used for evaporating and radiating fluid media sprayed by the spray head.
5. The heat loading device for testing the heat exchange coefficient of a plate heat exchanger according to claim 1, wherein the heat generating device comprises a plurality of electric heating devices.
6. A method of testing a heat load apparatus for testing a heat exchange coefficient of a plate heat exchanger, which is applied to the heat load apparatus according to any one of claims 1 to 5, comprising the steps of:
calculating heat according to the theory of the plate heat exchanger to be measured to start the heat generating power of the heat generating device;
when the heat of the heat generating device, the heat exchange device and the heat dissipation device is in a relative balance state, collecting multiple groups of related parameters of fluid media in the internal circulation pipeline system and the external circulation pipeline system at preset time intervals;
and calculating the heat exchange coefficient of the plate heat exchanger to be measured according to the average value of the related parameters of the multiple groups of fluid media.
7. The method for testing the heat load device for testing the heat exchange coefficient of the plate heat exchanger according to claim 6, wherein the calculation formula of the heat exchange coefficient of the plate heat exchanger to be tested is as follows:
Q 1 ＝C 1 ·q m1 ·ΔT m1 ＝C 1 ·ρ 1 ·F 25 ·(T 23 -T 24 )
Q 2 ＝C 2 ·q m2 ·ΔT m2 ＝C 2 ·ρ 2 ·F 45 ·(T 44 -T 43 )
Q 1 ＝Q 2 ＝Q 3
wherein Q is 1 For the heat production of heat-producing devices, Q 2 For the heat-dissipating capacity of the heat-dissipating device, Q 3 The heat exchange quantity of the plate heat exchanger to be measured is obtained; c 1 Specific heat capacity of the internal circulating fluid medium, q m1 Is the mass flow, Δ T, of the internally circulating fluid medium m1 Temperature difference, rho, of supply and return fluid for internal circulation fluid medium 1 Density of the internal circulating fluid medium, F 25 For the flow rate of the internally circulating fluid medium, T 23 Temperature, T, of the supply of the internally circulating fluid medium 24 Is the return temperature of the internal circulation fluid medium; c 2 Q is the specific heat capacity of the externally circulating fluid medium m2 For the mass flow of the externally circulating fluid medium, Δ T m2 Temperature difference, rho, between supply and return of externally circulating fluid medium 2 Density of the externally circulating fluid medium, F 45 For the flow of the externally circulating fluid medium, T 43 Temperature, T, of the supply of the externally circulating fluid medium 44 The return temperature of the externally circulating fluid medium; delta T m3 Is the log mean temperature difference; k is the heat exchange coefficient, f is a correction factor, and A is the heat exchange area of the plate heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211242525.7A CN115597898A (en) | 2022-10-11 | 2022-10-11 | Heat load device for testing heat exchange coefficient of plate heat exchanger and testing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211242525.7A CN115597898A (en) | 2022-10-11 | 2022-10-11 | Heat load device for testing heat exchange coefficient of plate heat exchanger and testing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115597898A true CN115597898A (en) | 2023-01-13 |
Family
ID=84846831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211242525.7A Pending CN115597898A (en) | 2022-10-11 | 2022-10-11 | Heat load device for testing heat exchange coefficient of plate heat exchanger and testing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115597898A (en) |
-
2022
- 2022-10-11 CN CN202211242525.7A patent/CN115597898A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| He et al. | Optimal thermal management of server cooling system based cooling tower under different ambient temperatures | |
| Dang et al. | Investigation on thermal design of a rack with the pulsating heat pipe for cooling CPUs | |
| Paramane et al. | CFD study on thermal performance of radiators in a power transformer: effect of blowing direction and offset of fans | |
| Chi et al. | Case study of a data centre using enclosed, immersed, direct liquid-cooled servers | |
| CN103336566A (en) | Server | |
| CN104501648A (en) | Cooling system for cabinet of data machine room | |
| Song et al. | Numerical and experimental investigation of thermal performance in data center with different deflectors for cold aisle containment | |
| Fan et al. | Analytical design methodology for liquid based cooling solution for high tdp cpus | |
| TW201928586A (en) | Coolant distribution unit | |
| Dong et al. | Performance of air/spray cooling system for large-capacity and high-power-density motors | |
| CN218444498U (en) | Heat load device for testing heat exchange coefficient of plate heat exchanger | |
| CN115597898A (en) | Heat load device for testing heat exchange coefficient of plate heat exchanger and testing method thereof | |
| Shao et al. | Operation optimization of liquid cooling systems in data centers by the heat current method and artificial neural network | |
| Erden et al. | Experimental investigation of CRAH bypass for enclosed aisle data centers | |
| CN105493271B (en) | Cooling device for current converter module | |
| Agostini et al. | Double-loop thermosyphon for electric components cooling | |
| Tian et al. | A new mathematical model for multi-scale thermal management of data centers using entransy theory | |
| Sickinger et al. | Energy Performance Testing of Asetek's RackCDU System at NREL's High Performance Computing Data Center | |
| CN105301046A (en) | Thermal performance detection device of heat exchanger | |
| Skuriat et al. | Thermal performance of baseplate and direct substrate cooled power modules | |
| CN105184043B (en) | Condenser heat transfer coefficient computational methods based on single dimensionless number | |
| CN104992066B (en) | Condenser heat transfer coefficient computational methods based on two dimensionless numbers | |
| CN207147308U (en) | The device of circulating cooling water management medium temperature | |
| CN217563997U (en) | Liquid cooling system | |
| CN115597304B (en) | Cooling system capable of controlling supercooling degree for ORC power generation device and control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |