CN113092150B - Simulation test device and method for human body heat dissipation load - Google Patents
Simulation test device and method for human body heat dissipation load Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 71
- 230000017525 heat dissipation Effects 0.000 title claims abstract description 62
- 238000004088 simulation Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims description 20
- 238000012544 monitoring process Methods 0.000 claims abstract description 32
- 238000010998 test method Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 82
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 81
- 238000010438 heat treatment Methods 0.000 claims description 18
- 238000013101 initial test Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000001737 promoting effect Effects 0.000 abstract 1
- 230000002572 peristaltic effect Effects 0.000 description 14
- 230000008569 process Effects 0.000 description 10
- 239000000463 material Substances 0.000 description 7
- 238000009834 vaporization Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008016 vaporization Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
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- 230000006872 improvement Effects 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
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- 230000000630 rising effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
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- 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
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/08—Railway vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a simulation test device and a simulation test method for human body heat dissipation load, wherein the simulation test device comprises: the system comprises a heat dissipation output system, an acquisition monitoring system and a power supply system; the heat dissipation output system is used for simulating a stable heat dissipation state of a human body heat and humidity load; the collection monitoring system is used for controlling the stable heat dissipation state of the heat dissipation output system and monitoring the parameters of the heat dissipation output system in the stable heat dissipation state; the power supply system is used for supplying power for the heat dissipation output system. The invention can better simulate the heat dissipation load of a human body, thereby improving the accuracy and the technical level of an air conditioner test and promoting the progress of the air conditioner test technology.
Description
Technical Field
The invention relates to the technical field of railway passenger car air conditioner tests, in particular to a human body heat dissipation load simulation test device and method for a railway passenger car.
Background
The common test standards for testing the air conditioner performance of the railway passenger car are BS EN 13129 2016 air conditioner for railway application and main-line railway vehicle-comfort parameter and type test, BS EN 14750-2:2006 air conditioner for railway application and urban and suburban railway vehicles-part 2: type test and GB/T33193.2-2016 air conditioner part 2 of railway vehicle: type tests and the like, the loading of latent heat load and sensible heat load of a simulated human body is required in the above standard partial test working conditions.
A foreign laboratory adopts a variable-frequency high-voltage spray humidifier to simulate the latent heat of a human body and adopts an electric heater to simulate the apparent heat of the human body. During testing, according to specific test working conditions, the working frequency of the humidifier is adjusted to achieve the latent heat value specified by the test outline, and the power of the electric heater is adjusted to achieve the sensible heat value specified by the test outline. This method has the following drawbacks: the frequency conversion high-pressure spray humidifier is centralized for humidification, and latent heat load distribution conditions in a train can not be simulated correctly when the train is in use, so that local humidity value is too high easily, and the accuracy of a test is influenced.
The electric humidifier is used for simulating latent heat of a human body in a domestic laboratory, the electric heater is used for simulating heat quantity of the human body, the electric humidifier needs to be calibrated before use, the corresponding relation among the power of the electric humidifier, the environment temperature and humidity and the humidification quantity is determined, then a latent heat correction coefficient is fitted, and in the later test process, the power of the electric heater and the power of the electric humidifier need to be calculated and adjusted according to actual working conditions so as to meet the latent heat value and the sensible heat value specified by a test outline. This method has the following drawbacks: firstly, the calibration of the electric humidifier takes longer time, and occupies a large amount of manpower and material resources; influence of ambient wind speed, relative humidity and liquid level height of the electric humidifier on the latent heat value is ignored in the calibration process, so that deviation exists in simulation accuracy; and thirdly, in the test process, the liquid level in the humidifier needs to be ensured to be higher than 2/3, so that water needs to be added frequently in the test, and the stability time of about 1h is needed after each time of water addition, which affects the test process and consumes manpower and material resources.
Therefore, when the air conditioner of the railway passenger car is tested at present, two sets of equipment of the electric heater and the electric humidifier are used for simulating the heat and humidity load of the human body, the power of the electric heater and the power of the electric humidifier are adjusted according to specific working conditions and calibration values in the early stage in the test process, the power value needs to be converted in a complex mode according to the specific working conditions, the operation is not convenient enough, the heat and humidity load simulation accuracy has certain deviation, personnel need to get on the car and add water for many times in the test process, electric equipment in a carriage is more, and potential safety hazards exist.
Therefore, it is desirable to develop a simulation test device and method for human body heat dissipation load of a railway passenger car, which overcome the above-mentioned drawbacks.
Disclosure of Invention
In view of the above problems, the present invention provides a simulation test device for human body heat dissipation load, which includes:
the heat dissipation output system is used for simulating a stable heat dissipation state of a human body heat and humidity load;
the collection monitoring system is used for controlling the stable heat dissipation state of the heat dissipation output system and monitoring the parameters of the heat dissipation output system in the stable heat dissipation state;
and the power supply system is used for supplying power to the heat dissipation output system.
The above simulation test apparatus, wherein the heat dissipation output system comprises:
the water tank is used for containing liquid working media;
the driving unit is arranged on the water tank;
the load simulators are connected to the driving unit and the power supply system, and the driving unit drives the liquid working medium in the water tank to flow into each load simulator under the control of the acquisition monitoring system.
In the above simulation test apparatus, each of the load simulators includes:
the shell is connected with the driving unit, and the driving unit drives the liquid working medium in the water tank to flow into the shell;
the heating pipe is arranged in the shell and electrically connected to the power supply system, and the heating pipe is used for heating the liquid working medium in the shell.
The above simulation test apparatus, wherein the power supply system comprises:
and the power adjustable power supply is electrically connected with the heating pipe and the acquisition monitoring system.
The above simulation test apparatus, wherein the heat dissipation output system further comprises:
the working bench is arranged on the water tank, and the driving unit is arranged on the working bench.
The above simulation test device, wherein the collection monitoring system comprises:
the upper computer is electrically connected with the driving unit and the power-adjustable power supply, the upper computer obtains total power and flow according to the temperature in the vehicle, sensible heat and/or latent heat of each passenger corresponding to the temperature in the vehicle and a whole vehicle fixed member, the upper computer adjusts the output power of the power-adjustable power supply according to the total power, and the upper computer adjusts the driving flow of the driving unit according to the flow.
The above simulation test device, wherein the collection monitoring system further comprises: and the data acquisition unit is used for acquiring the current liquid level height and the current temperature of the liquid working medium and outputting the current liquid level height and the current temperature to the upper computer, the upper computer obtains the current flow according to the current liquid level height and the cross sectional area of the water tank, and the upper computer monitors the temperature of the liquid working medium in the water tank according to the current temperature.
The above simulation test apparatus, wherein the data acquisition unit comprises:
the liquid level sensor is arranged in the water tank and used for acquiring the current liquid level height of the liquid working medium;
the temperature sensor is arranged in the water tank and used for acquiring the current temperature of the liquid working medium;
and the data acquisition module is electrically connected with the liquid level sensor and the temperature sensor, and sends the current liquid level height and the current temperature to the upper computer.
The above simulation test device, wherein the collection monitoring system further comprises: and the electrical parameter acquisition unit acquires the current power of the load simulator and outputs the current power to the upper computer.
The invention also provides a simulation test method of human body heat dissipation load, wherein the simulation test method is applied to any one of the simulation test devices, and comprises the following steps:
initial test steps: determining the number of required load simulators according to the whole vehicle, uniformly arranging the load simulators in the vehicle, arranging a power supply cable, switching on the load simulators to a power supply, and injecting a liquid working medium into a water tank of the heat dissipation output system;
the test steps are as follows: the method comprises the steps that a total power and flow are obtained through an acquisition monitoring system according to the temperature in the vehicle, sensible heat and/or latent heat of each passenger corresponding to the temperature in the vehicle and a whole vehicle fixed member, when the temperature of a liquid working medium is close to the temperature in the vehicle, power is supplied to a load simulator through a power supply system, after the output power of a power adjustable power supply and the driving flow of a driving unit are respectively set through the acquisition monitoring system according to the total power and the flow, the driving unit drives the liquid working medium to enter the load simulator, the load simulator heats the liquid working medium in the load simulator, and when the liquid level of the liquid working medium can be maintained at a position, a stable heat dissipation state simulating a human body heat and humidity load is achieved. Compared with the prior art, the invention has the following effects: the invention designs a human body heat dissipation load simulation test device and method for a railway passenger car, which can accurately simulate the heat and humidity load of a human body and the distribution condition thereof in the actual application process of a vehicle, not only can save a large amount of manpower and material resources and shorten the test period, but also can improve the accuracy and the credibility of the test and promote the improvement of the air conditioning test level of the railway passenger car, thereby solving the problems of insufficient latent heat simulation precision, occupation of manpower and material resources, incapability of scattered simulation of latent heat and the like in the prior art.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic diagram showing the change in physical properties of water during the test;
FIG. 2 is a graph of the human body heat and moisture load for a normal wear adult male;
FIG. 3 is a schematic structural diagram of a simulation test apparatus according to the present invention;
FIG. 4 is a flow chart of a simulation test method of the present invention.
Wherein the reference numerals are:
1: a drive unit;
2: a work bench;
3: a water pump pipe;
4: a water tank;
5: the water pipe is communicated;
l: a load simulator;
6: a power outlet;
7: a housing;
8: a water valve;
9: heating a tube;
10: a power supply cable;
11: a power supply connector;
12: a power adjustable power supply;
13: a liquid level sensor;
14: a temperature sensor;
15: a data acquisition module;
16: a network cable;
17: an electrical parameter acquisition module;
18: a router;
19: and (4) an upper computer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The exemplary embodiments of the present invention and the description thereof are provided to explain the present invention and not to limit the present invention. Additionally, the same or similar numbered elements/components used in the drawings and the embodiments are used to represent the same or similar parts.
As used herein, the terms "first", "second", "S1", "S2", …, etc. do not particularly denote an order or sequential meaning, nor are they intended to limit the invention, but rather are used to distinguish elements or operations described in the same technical terms.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
"plurality" in reference to this text includes "two" and "more than two"; reference to "multiple sets" herein includes "two sets" and "more than two sets".
In order to solve the problems of insufficient latent heat simulation precision, occupation of manpower and material resources, incapability of realizing scattered simulation of latent heat and the like in the prior art scheme, the invention designs the human body heat dissipation load simulation test device for the railway passenger car, and for the specific working conditions of the air conditioner test of the railway passenger car, the human body latent heat value and the apparent heat value specified in standards such as BS EN 13129 and the like can be simulated by adjusting the total power and the flow of the driving unit under the condition that the temperatures of a vehicle member and the temperature in the train are known, so that the accuracy and the technical level of the air conditioner test are improved, and the improvement of the air conditioner test technology is promoted.
Referring to fig. 1-2, fig. 1 is a schematic diagram of the change in physical properties of water during the test; FIG. 2 is a graph of the heat and moisture load of a normal wear adult male human body. The design principle of the present invention is specifically described below with reference to fig. 1 to 2 as follows.
Referring to fig. 1, the inventor finds out in theoretical analysis that the energy change (i.e. the latent heat of vaporization) of water is only related to the initial state and the final state of water, the water temperature of the initial state and the final state is t, and the latent heat of vaporization of water is t
The amount of heat absorbed required to vaporize water at temperature t to steam at temperature t, i.e.
Water temperature and latent heat of vaporization
The calculation formula of (a) is as follows:
wherein,
is the latent heat of vaporization of unit mass of water, unit kJ/kg; t is the temperature value of water in units of ℃.
Referring to fig. 2, the sensible heat value and the latent heat value of the human body at different temperatures are determined according to the heat and humidity load curve chart of the human body in the standard BS EN 13129, but it should be noted that the invention is only described by taking the BS EN 13129 standard as an example, and the invention is also applicable to other standards. Referring to FIG. 2, the apparent and latent heat values of human bodies at different temperatures are shown in Table 1 below, wherein the data are given by way of example only and are not intended to limit the present invention.
Table 1: human body load meter under different temperatures
The corresponding in-vehicle temperature t according to Table 1imCalculating a total power value, wherein the total power value is calculated by the formula:
P＝nXP' (2)；
wherein, P is total power value and unit W; n is the number of the vehicle passengers; p' is the temperature t in the vehicle of each passengerimTotal load in time, unit W.
When the water temperature approaches the temperature t in the vehicleimIn time, the water temperature value can be taken to be equal to the temperature t in the vehicleimThe value is calculated according to the formula (1) to obtain the latent heat value of vaporization of water
The temperature in the vehicle can be known as t by looking up a table 1imLatent heat value P of passengers in taxiDivingThe drive unit flow is calculated from the energy balance as follows:
wherein, L is the flow rate of the peristaltic pump, and the unit is g/min.
From the above analysis, it can be seen that: for the specific working condition of the air conditioner test of the railway passenger car, the human body latent heat value and the sensible heat value specified in standards such as BS EN 13129 and the like can be simulated by adjusting the total power and the flow of the driving unit under the condition that the temperature of a fixed member of the car and the temperature in the car are both known.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a simulation test apparatus according to the present invention. As shown in fig. 3, the simulation test apparatus for human body heat dissipation load of the present invention includes: the system comprises a heat dissipation output system, an acquisition monitoring system and a power supply system; the heat dissipation output system is used for simulating a stable heat dissipation state of a human body heat and humidity load; the collection monitoring system is used for controlling the stable heat dissipation state of the heat dissipation output system and monitoring the parameters of the heat dissipation output system in the stable heat dissipation state; and the power supply system is used for supplying power to the heat dissipation output system.
The invention is suitable for simulating the heat dissipation load of the human body during air conditioning cooling and heating tests of the railway passenger car, avoids the influence of the air flow velocity in the car, the relative humidity in the car and the liquid level height of the humidifier of different car types on the heat and humidity load simulation equipment, has higher precision of simulating the sensible heat value and the latent heat value of the human body, and greatly improves the accuracy and the reliability of test results.
Further, the heat dissipation output system includes: a drive unit 1, a water tank 4, and a plurality of load simulators L; the water tank 4 is used for containing liquid working medium; the driving unit 1 is arranged on the water tank 4; the plurality of load simulators L are connected to the driving unit 1 and the power supply system, and the driving unit 1 drives the liquid working medium in the water tank 4 to flow into each load simulator L under the control of the acquisition monitoring system.
Specifically, the present invention is described with the drive unit 1 being a peristaltic pump as a preferred embodiment, but the present invention is not limited thereto, and the peristaltic pump will be described below as an example. A water pump pipe 3 of the peristaltic pump extends into a water tank 4, the peristaltic pump is communicated with each load simulator L through a communication water pipe 5, in the embodiment, a water valve 8 is arranged at the joint of the load simulator L and the communication water pipe 5, and after the peristaltic pump works, liquid working media in the water tank 4 sequentially enter the load simulator L through the water pump pipe 3, the peristaltic pump, the communication water pipe 5 and the water valve 8. The calibration process is simple, only the flow of the peristaltic pump needs to be calibrated, a large amount of manpower and material resources are saved, and the reliability of a simulation result is higher.
It should be noted that the present invention is a preferred embodiment in which the liquid working medium is softened water, but the present invention is not limited thereto.
In this embodiment, the heat dissipation output system further includes: the working table frame 2 is arranged on the water tank 4, and the driving unit 1 is arranged on the working table frame 2.
Wherein each of the load simulators L includes: a shell 7 and a heating pipe 9; the shell 7 is connected to the driving unit 1 through a communication water pipe 5, and the driving unit 1 drives the liquid working medium in the water tank 4 to flow into the shell 7; the heating pipe 9 is installed in the shell 7 and electrically connected to the power supply system, and the heating pipe 9 is used for heating the liquid working medium in the shell 7.
Still further, the power supply system includes: and the power adjustable power supply 12 is electrically connected to the heating pipe 9 and the acquisition monitoring system 12.
Specifically, the power adjustable power source 12 is electrically connected to the power supply cable 10, the power supply cable 10 is electrically connected to the power connectors 11 corresponding to the number of the load simulators L, the housing 7 is provided with the power sockets 6, the heating pipe 9 is electrically connected to the power sockets 6, the power sockets 6 are electrically connected to the power connectors 11, the power adjustable power source 12 is further electrically connected to the collection monitoring system through the router 18, the load simulators L and the collection monitoring system are powered through the power adjustable power source 12, that is, the power adjustable power source 12, the power supply cable 10, the power connectors 11 and the load simulators L are sequentially connected in the order, so that the purpose that the power adjustable power source 12 adjusts the output power of the load simulators L is achieved.
In this embodiment, each load simulator L is composed of a power socket 6, a housing 7, a water valve 8 and a heating pipe 9, so as to simulate the heat dissipation load of one or more human bodies.
Still further, the acquisition monitoring system includes: the upper computer 19 is electrically connected to the power-adjustable power supply 12 and the driving unit 1 through the router 18, the upper computer 19 obtains total power and flow according to the temperature in the vehicle and sensible heat and/or latent heat of each passenger corresponding to the temperature in the vehicle and a whole vehicle decider, the upper computer 19 adjusts the output power of the power-adjustable power supply according to the total power, and the upper computer 19 adjusts the driving flow of the driving unit according to the flow.
Specifically, the upper computer 19 prestores human body load tables (see table 1) at different temperatures, the upper computer 19 calculates the total power P of the simulated human body heat and humidity load in the vehicle and the flow L of the driving unit according to the human body load tables at different temperatures through the above formulas (1) - (3), the upper computer 19 adjusts the output power of the power adjustable power supply 12 according to the total power P to be the same as the total power P and maintains stability, and the upper computer 19 adjusts the driving flow of the driving unit according to the flow L to be the same as the flow L.
The working process of the test device is described in detail below, the heat dissipation output system is placed in the vehicle, and during the test, the temperature in the vehicle is assumed to be timThe upper computer 19 calculates the total power P of the heat and humidity load of the simulated human body in the vehicle according to the requirement of the test working condition, the total power is set by the upper computer 19, the power value of the power adjustable power supply 12 is automatically adjusted and kept stable, and after a period of time, the surface temperature of the heating pipe 9 reaches a stable state. The water tank 4 is filled with softened water, and after a period of time, the temperature of the water in the water tank 4 is t which is the same as the temperature in the vehicleimThen, the peristaltic pump is started, the driving flow is set through the upper computer 19, and the temperature in the water tank 4 is timThe softened water is pressed into a communicating pipe according to a certain flow and finally enters a load simulator L; in the initial stage, the liquid level in the load simulator L is lower, the evaporation of water amount is less and lower than the water supply amount of the peristaltic pump, therefore, the liquid level is in a rising state, the liquid level height of each load simulator L is always the same, the evaporation speed of the water amount can be increased along with the rising of the liquid level until a certain moment begins, the evaporation water amount in the load simulator L and the water supply amount of the peristaltic pump reach balance, namely the liquid level is kept unchanged, and then the load simulator L enters a stable heat dissipation state for simulating the heat and humidity load of a human body.
Still further, the acquisition monitoring system further comprises: a data acquisition unit and an electrical parameter acquisition unit 17; the data acquisition unit acquires the current liquid level height and the current temperature of the liquid working medium and outputs the current liquid level height and the current temperature to the upper computer 19, and the upper computer 19 obtains the current flow according to the current liquid level height and the cross-sectional area of the water tank 4, so that the flow is monitored through the upper computer 19; the upper computer 19 monitors the temperature of the liquid working medium in the water tank 4 according to the current temperature; the electrical parameter acquisition unit 17 is electrically connected to the load simulator L, the power-adjustable power supply 12 and the upper computer 19, and the electrical parameter acquisition unit 17 acquires the current power of the load simulator L and outputs the current power to the upper computer 19, so that the current power of the load simulator L is monitored through the upper computer 19.
Wherein the data acquisition unit comprises: a liquid level sensor 13, a temperature sensor 14 and a data acquisition module 15; the liquid level sensor 13 is arranged in the water tank 4, and the liquid level sensor 13 collects the current liquid level height of the liquid working medium; the temperature sensor 14 is arranged in the water tank 4, the temperature sensor 14 collects the current temperature of the liquid working medium, for example, when the current temperature in the vehicle is 22-25 ℃, after the liquid working medium is injected into the water tank 4, if the current temperature collected by the temperature sensor 14 is close to the temperature in the vehicle, the power is supplied to the load simulator L through the power-adjustable power supply 12, in the embodiment, the approach to the temperature in the vehicle means that the current temperature is 20-30 ℃; data acquisition module 15 set up in on the workstation frame 2 and electric connection in level sensor 13 reaches temperature sensor 14 will current liquid level height reaches current temperature passes through router 18 and sends to host computer 19, in this embodiment, data acquisition module 15 connects host computer 19 through net twine 16 and router 18.
In an embodiment of the present invention, the current temperature collected by the temperature sensor 14 is displayed by the upper computer 19, the tester determines that power can be supplied according to the current temperature displayed by the upper computer 19, and then manually turns on the power adjustable power supply 12 to supply power to the load simulator L.
In another embodiment of the present invention, after the upper computer 19 determines that the current temperature is close to the in-vehicle temperature according to the current temperature acquired by the temperature sensor 14, the upper computer 19 outputs a power supply signal to the power adjustable power supply 12, and the power adjustable power supply 12 is turned on to supply power to the load simulator L.
Referring to fig. 4, fig. 4 is a flowchart of a simulation test method according to the present invention. As shown in fig. 4, the simulation test method of the human body heat dissipation load of the present invention includes:
test initiation step S1: determining the number of required load simulators according to the whole vehicle personnel, uniformly arranging the load simulators in the vehicle, arranging a power supply cable, connecting the load simulators with a power supply, and injecting a liquid working medium into a water tank of the heat dissipation output system;
test step S2: the method comprises the steps that a total power and a flow are obtained through a collecting and monitoring system according to the temperature in a vehicle, the sensible heat and/or the latent heat of each passenger corresponding to the temperature in the vehicle and the whole vehicle fixed member, when the temperature of a liquid working medium is close to the temperature in the vehicle, power is supplied to a load simulator through a power supply system, after the output power of a power adjustable power supply and the driving flow of a driving unit are respectively set through the collecting and monitoring system according to the total power and the flow, the driving unit drives the liquid working medium to enter the load simulator, the load simulator heats the liquid working medium in the load simulator, and when the liquid level of the liquid working medium is maintained at a position, a stable heat dissipation state simulating a human body heat and humidity load is achieved.
Specifically, before the test starts, the number of required load simulators is calculated according to the order of the whole vehicle, the load simulators are uniformly arranged in a passenger room, then a power supply cable is arranged, the load simulators are connected with a power supply, and finally softened water is filled into a water tank; after the test is started, the total power value and the flow value of the peristaltic pump are input into the upper computer, softened water in the water tank enters the shell of the load simulator through the water pump pipe, the peristaltic pump, the communicating pipe and the water valve, the liquid level in the shell is gradually increased along with the increase of time, but after a period of time, the liquid level is maintained at a certain position in the shell, namely, the stable heat dissipation state for simulating the heat and humidity load of the human body is achieved, and therefore the latent heat value and the sensible heat value of the human body specified in standards such as BS EN 13129 and the like can be simulated by adjusting the total power and the flow of the peristaltic pump.
In conclusion, the invention can accurately simulate the heat and humidity load of the human body and the distribution condition thereof in the actual application process of the vehicle, not only can save a large amount of manpower and material resources and shorten the test period, but also can improve the accuracy and the reliability of the test and promote the improvement of the air conditioner test level of the railway passenger car.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. The utility model provides a human heat dissipation load's analogue test device which characterized in that includes:
the heat dissipation output system is used for simulating a stable heat dissipation state of a human body heat and humidity load;
the collection monitoring system is used for controlling the stable heat dissipation state of the heat dissipation output system and monitoring the parameters of the heat dissipation output system in the stable heat dissipation state;
the power supply system is used for supplying power to the heat dissipation output system;
the heat dissipation output system includes:
the water tank is used for containing liquid working media;
the driving unit is arranged on the water tank;
the load simulators are connected to the driving unit and the power supply system, and the driving unit drives the liquid working medium in the water tank to flow into each load simulator under the control of the acquisition monitoring system;
each of the load simulators includes:
the shell is connected with the driving unit, and the driving unit drives the liquid working medium in the water tank to flow into the shell;
the heating pipe is arranged in the shell and is electrically connected to the power supply system, and the heating pipe is used for heating the liquid working medium in the shell;
the power supply system includes:
the power adjustable power supply is electrically connected to the heating pipe and the acquisition monitoring system;
the collection monitoring system comprises:
the upper computer is electrically connected with the driving unit and the power-adjustable power supply, total power and flow are obtained by the upper computer according to the temperature in the vehicle, sensible heat and/or latent heat of each passenger corresponding to the temperature in the vehicle and a whole vehicle fixed member, the output power of the power-adjustable power supply is adjusted by the upper computer according to the total power, and the driving flow of the driving unit is adjusted by the upper computer according to the flow;
the driving unit drives the liquid working medium to enter the load simulator, the load simulator heats the liquid working medium in the load simulator, and when the liquid level of the liquid working medium is maintained at a position, a stable heat dissipation state for simulating a human body heat and humidity load is achieved.
2. The simulation test apparatus of claim 1, wherein the heat dissipation output system further comprises:
the working bench is arranged on the water tank, and the driving unit is arranged on the working bench.
3. The simulation test apparatus of claim 1, wherein the collection monitoring system further comprises: and the data acquisition unit is used for acquiring the current liquid level height and the current temperature of the liquid working medium and outputting the current liquid level height and the current temperature to the upper computer, the upper computer obtains the current flow according to the current liquid level height and the cross sectional area of the water tank, and the upper computer monitors the temperature of the liquid working medium in the water tank according to the current temperature.
4. A simulation test device according to claim 3, wherein the data acquisition unit comprises:
the liquid level sensor is arranged in the water tank and used for acquiring the current liquid level height of the liquid working medium;
the temperature sensor is arranged in the water tank and used for acquiring the current temperature of the liquid working medium;
and the data acquisition module is electrically connected with the liquid level sensor and the temperature sensor, and sends the current liquid level height and the current temperature to the upper computer.
5. The simulation test apparatus of claim 1, wherein the collection monitoring system further comprises: and the electrical parameter acquisition unit acquires the current power of the load simulator and outputs the current power to the upper computer.
6. A simulation test method for a heat dissipation load of a human body, which is applied to the simulation test apparatus according to any one of claims 1 to 5, the simulation test method comprising:
initial test steps: determining the number of required load simulators according to the whole vehicle personnel, uniformly arranging the load simulators in the vehicle, arranging a power supply cable, connecting the load simulators with a power supply, and injecting a liquid working medium into a water tank of the heat dissipation output system;
the test steps are as follows: the method comprises the steps that a total power and a flow are obtained through a collecting and monitoring system according to the temperature in a vehicle, the sensible heat and/or the latent heat of each passenger corresponding to the temperature in the vehicle and the whole vehicle fixed member, when the temperature of a liquid working medium is close to the temperature in the vehicle, power is supplied to a load simulator through a power supply system, after the output power of a power adjustable power supply and the driving flow of a driving unit are respectively set through the collecting and monitoring system according to the total power and the flow, the driving unit drives the liquid working medium to enter the load simulator, the load simulator heats the liquid working medium in the load simulator, and when the liquid level of the liquid working medium is maintained at a position, a stable heat dissipation state simulating a human body heat and humidity load is achieved.
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