An evaluation method for watercraft cabin electronics cooling requirements

Abstract

The application discloses a kind of water download human vehicle cabin electronic equipment cooling requirement economy evaluation method, belong to ship overall design field, including: the arrangement scheme of cabin electronic equipment and the electronic power consumption of each equipment are counted, in combination with cabin environment characteristics and cabin three-dimensional digital model, for air cooling and water cooling and equipment start combination, carry out cabin thermal simulation;The heat dissipation requirement of electronic equipment is counted, and the air cooling, water cooling average and peak heat dissipation radiation air noise required by heat dissipation are counted respectively, the cabin air noise distribution is calculated through cabin three-dimensional digital model;When using air cooling scheme, determine the additional air conditioning energy consumption required to achieve cabin comfort, when using water cooling scheme, when different overall water cooling heat dissipation mode is used, the cooling water required is counted, and then the required overall cooling water cooling support resource requirement of electronic equipment is evaluated.Combined with the environment characteristics of water download human vehicle, it is used to assist overall top-level decision, to determine the overall cooling scheme of electronic equipment.

Description

TECHNICAL FIELD

[0001] The present application proposes a water cooling demand analysis, benefit evaluation and specific water cooling requirement design method for electronic equipment of a waterborne manned vehicle, and belongs to the field of ship overall design, and is suitable for the ship industry. BACKGROUND

[0002] The cabin space of the waterborne manned vehicle is narrow and hot, and the display console and electronic cabinet are densely arranged, when the traditional air cooling is used for the electronic equipment, the heat dissipation energy consumption is large, the heat emitted by the electronic equipment is directly dissipated to the cabin through the fan, causing the cabin to be stuffy, in order to actively cool the high-power electronic equipment, the fan power is required to be high, the cabin noise caused by air cooling is loud, and the personnel operation is greatly affected. The sensory effect of these problems on the user is more intense under the conditions of high temperature and high humidity. If the cabin air conditioner is used for cabin heat dissipation, since the specific heat energy of air is much smaller than that of water, the heat exchange efficiency is low, and energy is wasted.

[0003] At present, the water cooling of the numerous electronic equipment of the waterborne manned vehicle is proposed, the cooling resources can be unified, the resource waste caused by separate design of the equipment can be reduced by intensive design, but additional hierarchical heat exchange equipment and pipelines need to be constructed, and certain overall resources are also occupied. SUMMARY

[0004] In view of the above defects or improvement needs of the prior art, the present application proposes an electronic equipment overall cooling economic evaluation analysis method suitable for the characteristics of the waterborne manned vehicle, which is used for assisting the overall top-level decision to determine the electronic equipment overall cooling scheme in combination with the environmental characteristics of the waterborne manned vehicle.

[0005] To achieve the above purpose, the present application provides an economic evaluation method for cooling requirements of cabin electronic equipment of a waterborne manned vehicle, comprising:

[0006] (1) determining the cabin thermal environment under the two schemes of water cooling and air cooling: the arrangement scheme of the main electronic equipment of the cabin and the electronic power consumption of each equipment are counted, the cabin environmental characteristics of the waterborne manned vehicle are combined, including the temperature and humidity variation range of the cabin, the cabin three-dimensional digital model is combined, the heat simulation of the cabin is carried out under the equipment start combination of the cabin under the typical task, respectively for the two cases of air cooling and water cooling, the heat distribution of the cabin is obtained, and the working energy consumption required by the air conditioning system is counted;

[0007] (2) determining the cabin air noise environment under the two schemes of water cooling and air cooling: the heat dissipation amount required by the main electronic equipment of the cabin is counted, the average and peak heat dissipation radiation air noise required by the heat dissipation amount is counted, respectively, the cabin air noise distribution is calculated through the cabin three-dimensional digital model;

[0008] (3) Determine the guarantee resource demand: when using air cooling scheme, determine the additional air conditioning energy consumption required to achieve cabin comfort, when using water cooling scheme, determine the cooling water required when using different overall water cooling methods, and then evaluate the overall cooling water cooling resource demand required by the electronic equipment.

[0009] In some optional embodiments, the cabin electronic equipment heat dissipation and overall radiation noise evaluation method is calculated as follows:

[0010] In terms of cabin electronic equipment heat dissipation, the main heat dissipation equipment comes from the heat dissipation of consoles and electronic cabinet computing equipment, accounting for more than 80% of the total, followed by lighting heat and radiation heat. In terms of computing equipment heat dissipation, considering the different heat generation of equipment under different working conditions, the simultaneous use coefficient h1, utilization coefficient h2, and load uniformity coefficient h3 can be set. These coefficients are related to the system structure, working state, and electronic components of the electronic equipment, and the total coefficient is generally above 0.9; in terms of cabin lighting equipment heat dissipation, part of the energy becomes light, and part of the light energy is eventually absorbed by the cabin wall and eventually changes into heat. Therefore, the final heat dissipation of the lighting equipment is equal to its rated output power. According to the above single equipment estimation method, combined with numerical simulation calculation method and cabin three-dimensional digital model, the cabin electronic equipment heat dissipation can be simulated and calculated, and the heat distribution can be evaluated. According to the heat distribution result, the cabin air conditioner fan power consumption, air pipe arrangement position, etc. can be further evaluated, and the key heat treatment electronic equipment object can be found, and targeted high-efficiency cooling design can be carried out, and the cooling resource demand can be evaluated.

[0011] In terms of electronic equipment air noise radiation, for non-mechanical action electronic equipment, the noise source mainly comes from the radiation noise caused by the electronic equipment cooling fan or water cooling fluid flow. The typical electronic equipment in the cabin can be digitally analyzed and calculated to form a preliminary noise distribution, and combined with the typical equipment field measurement result, the cabin three-dimensional digital model can be modified and fed back. After obtaining the noise radiation distribution of the typical electronic equipment in the cabin, combined with numerical calculation and analysis method, the overall space radiation field calculation and evaluation of the air radiation noise of each equipment in the cabin can be further carried out, so that the air noise radiation field of the electronic equipment using different cooling methods can be obtained. This radiation field is caused by electronic equipment alone, which is different from the measured result, because the measured result also contains other mechanical equipment noise sources. The numerical calculation result is more meaningful for evaluating the influence of different cooling methods.

[0012] Overall, compared with the prior art, the above technical solutions conceived by the present application can achieve the following beneficial effects:

[0013] An evaluation decision method for a whole cooling scheme of cabin electronic equipment of a water-borne manned vehicle is provided, quantitative calculation, simulation and actual measurement correction method of heat dissipation energy consumption, cabin temperature and air noise are used to quantitatively guide the whole decision of cabin electronic equipment cooling from the aspects of cabin heat, noise, guarantee resource cost. The method has guiding significance for the overall design method of the working conditions of the water-borne manned vehicle and other equipment with high equipment density, space shortage, long personnel operation time, high comfort requirement and high energy consumption control. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a water-borne manned vehicle electronic equipment cooling economic evaluation method flow chart provided by the embodiment of the present application;

[0015] Figure 2 It is a single-point measurement temperature transmitter (TX) and flow transmitter (F) installation schematic diagram provided by the embodiment of the present application;

[0016] Figure 3 It is a typical temperature distribution image provided by the embodiment of the present application;

[0017] Figure 4 It is a three-dimensional arrangement modeling and simulation of a heat source provided by the embodiment of the present application;

[0018] Figure 5 It is a heat field numerical calculation cross-section analysis profile provided by the embodiment of the present application;

[0019] Figure 6 It is a typical cross-section temperature cloud image provided by the embodiment of the present application;

[0020] Figure 7 It is a typical frequency band typical noise cloud image provided by the embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other.

[0022] The present application comprehensively evaluates the electronic equipment cooling economic efficiency from the aspects of cabin thermal environment, air noise environment and guarantee resource demand, determines the final scheme, and the flow chart is as shown in Figure 1 The method comprises the following steps:

[0023] (1) Determine the cabin thermal environment under the two schemes of water cooling and air cooling: Statistically arrange the main electronic equipment in the cabin and the electronic power consumption of each device, combine the cabin environment characteristics of the water download spacecraft, including the temperature and humidity range of the cabin, combine the cabin human comfort evaluation standard, combine the three-dimensional digital model of the cabin, and respectively for the two cases of air cooling and water cooling, the equipment combination under the typical task of the cabin, the thermal simulation of the cabin is carried out, and the thermal distribution of the cabin is obtained. The working energy consumption required by the air conditioning system is counted;

[0024] (2) Determine the cabin air noise environment under the two schemes of water cooling and air cooling: Statistically count the heat dissipation demand of the main electronic equipment in the cabin, and respectively count the average and peak heat dissipation radiation air noise required by the heat dissipation. The three-dimensional digital model of the cabin is calculated to obtain the air noise distribution of the cabin.

[0025] (3) Determine the support resource demand: When the air cooling scheme is adopted, the additional air conditioning energy consumption required to achieve the cabin comfort is determined, and when the water cooling scheme is adopted, the cooling water required by different overall water cooling heat dissipation modes is counted, and then the overall cooling water support resource demand of the electronic equipment is evaluated.

[0026] In the embodiment of the present application, the heat dissipation of the electronic equipment to the water download spacecraft cabin heat distribution evaluation method is as follows:

[0027] The electronic equipment as a heat source adopts a measurement and estimation method, the measured data obtained by the test is used to simulate the simulation heat source, the temperature result is obtained according to the simulation calculation, so as to evaluate the equipment heat dissipation condition and the overall temperature distribution of the command cabin under different heat dissipation modes.

[0028] The heat source of the room is the heat dissipation of the related equipment, and the walls of other cabins are heat-insulated. For the equipment cooled by water, the heat taken away by the water cooling system is calculated according to the specific heat capacity and flow rate of water, and the remaining heat is exchanged to the cabin through air convection; for the electronic equipment without external mechanical movement and adopting natural cooling or forced air cooling, all the heat is exchanged through air convection, and the total energy consumption of the equipment is dissipated into the cabin through air convection.

[0029] Since the analysis method has analysis error for a single electronic equipment with complex internal arrangement, it is necessary to correct the heat source before evaluation by combining analysis and measurement. The infrared thermal imager is used to shoot the surface temperature distribution image of the measured equipment, and the heat dissipation of the measured equipment is reflected through the surface temperature distribution image of the measured equipment. The temperature transmitter and flow transmitter installation diagram of the measured equipment using liquid cooling is as shown in Figure 2 First, the measured equipment does not work, the surface temperature distribution image of the measured equipment is shot, and the room temperature is measured, and the typical temperature distribution image is as shown in Figure 3As shown; after the measured device is stably running, the surface temperature distribution image of the measured device is shot, and multiple measurements are repeatedly measured after a certain time interval. After the measured device is turned on, after the device is stably running, if liquid cooling is used, the inlet temperature T1 of the cooling water in the liquid cooling system, the outlet temperature T2 of the cooling water and the volume flow rate q of the cooling water are monitored, then the heat taken away by the measured device through the liquid cooling system can be calculated as Q liquid = Cm (T2-T1) ; wherein C is the specific heat capacity of the cooling liquid, m is the mass flow rate of the liquid, and the heat Q liquid taken away by the measured device through the system is calculated. The heat dissipated into the cabin by the liquid cooling device can be calculated by Q air = Q total - Q liquid - Q apparent, wherein Q apparent represents the optical power consumption of the display and the like of the electronic device, and the power is currently consumed in the form of light, and finally converted into cabin heat, and Q total can be obtained according to the power parameter data of the electronic device. Finally, the cabin air heat dissipation correction of the liquid cooling device is completed.

[0030] The cabin is modeled in three dimensions, the air pipe is located above the workbench, the air pipe has an air supply port, and the return air pipe is modeled, typically as shown in Figure 4 After the simulation heat source and boundary conditions are determined, the cabin can be simulated by using finite element software such as ANSYS. The standing and sitting heights of the staff and the main activity area can be considered to select the temperature field profile of interest, typically as shown in Figure 5 According to the Figure 1 flow, the cabin temperature fields of the electronic device using the whole water cooling and air cooling two different schemes are respectively compared, typically as shown in Figure 6 .

[0031] In the embodiment of the present application, the calculation and evaluation method of the cabin air noise radiation level of different heat dissipation schemes is as follows:

[0032] Acoustic analysis uses simulation software EASE, and the modeling function of EASE software is used to model the cabin in three dimensions. The shape of the cabin is a semi-cylindrical column, and in the simulation, multiple typical devices are considered to work simultaneously to emit noise.

[0033] In the model calibration process, the actual experimental test is completed in an anechoic chamber, 1 / 3 octave spectrum data at a distance of 1m from a single device periphery are obtained, the software can input the spectrum at a distance of 1m from the noise source (sound emitting device) as the acoustic input boundary condition; the distribution of electrical equipment in the command cabin is used as the basis for determining the coordinates of the sound source; in order to verify the accuracy of the simulation, the experimental test results and the simulation results of a single typical device are compared, and the model is corrected;

[0034] Multiple typical devices actually arranged in the cabin are taken as observation objects. Through the cross-sectional noise distribution cloud diagram of the key monitoring points and the personnel activity intensive area, according to the simulation results, the air noise distribution in the cabin is compared between the water cooling technology and the full air cooling, and the example distribution diagram is shown in Figure 7 .

[0035] In the embodiment of the present application, the cabin electronic equipment overall cooling scheme is evaluated as follows:

[0036] Based on the above method, the temperature distribution of the cabin, the noise distribution at different frequencies and the spatial distribution cloud of the total air noise level when the cabin electronic equipment adopts different cooling schemes can be calculated. According to the human factor engineering requirements, the key heat sources and noise sources are optimized, and the final comparison results of the air cooling scheme and the liquid cooling scheme are obtained. The comparison contents include cabin temperature distribution comparison, noise comparison, guarantee resource cost comparison, total energy consumption comparison and the like. Combined with the comparison contents and the weight coefficient, the cabin electronic equipment overall cooling scheme is finally determined.

[0037] It should be noted that, according to the needs of implementation, each step / component described in the present application can be split into more steps / components, or two or more steps / components or part of the operation of the steps / components can be combined into a new step / component, so as to achieve the purpose of the present application.

[0038] Those skilled in the art will readily understand that the above description is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method of evaluating watercraft cabin electronics cooling requirements for a watercraft, characterized by, Comprise: (1) Statistics cabin electronic equipment layout and each equipment electronic power consumption, combined with the water download human spacecraft cabin environment characteristics, including the temperature, humidity range, combined with cabin human comfort evaluation standard, combined with cabin three-dimensional digital model, respectively for the use of air cooling and water cooling two cases, cabin equipment combination under the task, the thermal simulation of the cabin, get the thermal distribution of the cabin, and statistics of the working energy consumption of air conditioning system; (2) Statistics of the heat dissipation requirement of cabin electronic equipment, respectively statistics of the heat dissipation required by air cooling, water cooling and peak heat dissipation radiation air noise, through the cabin three-dimensional digital model, calculate the air noise distribution of the cabin; (3) When using air cooling scheme, determine the additional air conditioning energy consumption required to achieve cabin comfort, when using water cooling scheme, when different overall water cooling methods are used, the required cooling water is calculated, and the required electronic equipment overall cooling water cooling support resource demand is evaluated; Step (2) includes: In the aspect of electronic equipment air noise radiation, digital analysis and calculation are carried out for non-mechanical action electronic equipment to form preliminary noise distribution, and the cabin three-dimensional digital model is corrected and fed back combined with the field test results of non-mechanical action electronic equipment; After obtaining the noise radiation distribution of non-mechanical action electronic equipment in the cabin, combined with numerical calculation and analysis method, further calculate and evaluate the air radiation noise of each equipment in the cabin to obtain the air noise radiation field of electronic equipment using different cooling methods.

2. The method of claim 1, wherein, Step (1) includes: Estimate the heat dissipation of each single electronic equipment in the cabin, wherein the main heat dissipation equipment comes from the heat dissipation of console, electronic cabinet computing equipment, followed by lighting heat, radiation heat, the heat dissipation of computing equipment is calculated, considering the different heat dissipation of equipment under different working conditions, set the simultaneous use coefficient h1, utilization coefficient h2, load uniformity coefficient h3, get the heat dissipation of computing equipment, the final heat dissipation of lighting equipment is equal to its rated output power; According to the single equipment heat dissipation estimation method, combined with numerical simulation calculation method and cabin three-dimensional digital model, carry out cabin electronic equipment heat dissipation simulation calculation, and evaluate the heat distribution, according to the heat distribution result, further evaluate the air conditioning fan power consumption and air pipe arrangement position of the cabin, and find the key heat treatment electronic equipment object, in order to carry out targeted high efficiency cooling design, evaluate the cooling resource demand.

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