CN103926098A - Adjusting method for cooling-water machine load varying system and cooling-water machine load varying system - Google Patents
Adjusting method for cooling-water machine load varying system and cooling-water machine load varying system Download PDFInfo
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- CN103926098A CN103926098A CN201410138445.6A CN201410138445A CN103926098A CN 103926098 A CN103926098 A CN 103926098A CN 201410138445 A CN201410138445 A CN 201410138445A CN 103926098 A CN103926098 A CN 103926098A
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Abstract
The invention provides a cooling-water machine load varying system which is used for simulating the bearing load of a cooling-water machine system. The cooling-water machine load varying system comprises a water tank and variable load pipelines communicated with the water tank, and the variable load pipelines are communicated with a heat exchanger of the cooling-water machine system in a heat exchange mode. A pipeline branch is connected between the input pipeline and the output pipeline of the variable load pipelines. The input pipeline is connected with the pipeline branch through a three-way adjusting value. Part of cooling liquid is divided through the pipeline branch and flows into the input pipeline to cool liquid flowing out of the water tank. The flow direction and flow rate of the cooled liquid in the variable load pipelines are adjusted through the arranged three-way adjusting value so that different temperature environments in the variable load pipelines can be simulated, the purpose that cooling capacity generated by the cooling-water machine system is utilized to be mixed with heat in the variable load pipelines is achieved, and other devices do not need to be arranged to produce a load temperature environment, and the testing cost is reduced. The invention further provides an adjusting method for the cooling-water machine load varying system.
Description
Technical field
The present invention relates to cooling device technical field, more particularly, relate to a kind of cooling-water machine varying load system control method and cooling-water machine varying load system.
Background technology
Cooling-water machine is a kind of water cooling equipment, and the chilled water of constant temperature, constant current, constant voltage can be provided.Cooling-water machine principle of work is first to machine inner water tank, to inject a certain amount of water, by water cooler refrigeration system by water cooling, by water pump, low-temperature cooling water is sent into the cooling equipment that needs again, chilled water is taken away rear temperature rising by heat and is back to water tank again, reaches the effect of cooling device by this process.
Cooling-water machine is in the actual use of client, because the variation of client's startup-shutdown and demand temperature, the load that uses side is constantly to change, the compressor in cooling-water machine with and system unit also the variation of the use side load of basis make corresponding variation.For the respective response speed to varying loading in testing laboratory's checking cooling-water machine system, need to be by suitable unit simulation client's service condition.
Existing test method generally adopts increases cooling-water machine or Steam Heating (or electrical heating), and for simulating refrigeration duty or thermal load, this kind of method input cost is high, and test difficulty is larger.
Therefore, how reducing the cost that cooling-water machine carries out varying loading test, is current those skilled in the art's problem demanding prompt solution.
Summary of the invention
In view of this, the invention provides a kind of cooling-water machine varying load system, to realize, reduce the cost that cooling-water machine carries out varying loading test; The present invention also provides a kind of cooling-water machine varying load system control method.
In order to achieve the above object, the invention provides following technical scheme:
A cooling-water machine varying load system, for the simulation to cooling-water machine system bearing load, comprise water tank and with the varying load pipeline of described water tank conducting, described varying load pipeline is communicated with the heat interchanger heat exchange of described cooling-water machine system;
Between the intake line of described varying load pipeline and output pipe, be connected with pipe branch road, described intake line is connected by three-way control valve with described pipe branch road.
Preferably, in above-mentioned cooling-water machine varying load system, on described intake line, be provided with the flowmeter that total flow in it is measured.
Preferably, in above-mentioned cooling-water machine varying load system, described intake line is provided with power water pump along its flow direction away from a side of described pipe branch road.
Preferably, in above-mentioned cooling-water machine varying load system, described water tank is constant temperature water tank, and described constant temperature water tank water temperature is 18-25 ℃.
Preferably, in above-mentioned cooling-water machine varying load system, described constant temperature water tank water temperature is 20 ℃.
Preferably, in above-mentioned cooling-water machine varying load system, input end and output terminal that described varying load pipeline connects described heat interchanger are respectively arranged with the first temperature measuring equipment of the temperature measurement in described varying load pipeline and the second temperature measuring equipment.
Preferably, in above-mentioned cooling-water machine varying load system, described cooling-water machine system comprises compressor train, condenser and the heat interchanger of pipeline UNICOM, and described compressor train comprises that four and every compressor group comprise 2 compressors.
A cooling-water machine varying load system control method, open to regulate water pump, and the water temperature of setting described the first temperature measuring equipment position is the first design temperature; Open the compressor of predetermined number of units, regulate three-way control valve aperture constant to guarantee the first design temperature, and record the now loading aperture of three-way control valve; Set the aperture of three-way control valve for loading aperture, and open the corresponding aperture situation lower compression machine quantity that loads, the start and stop that are recorded in all compressors under scheduled duration change.
Preferably, in above-mentioned cooling-water machine varying load system control method, described the first design temperature is 12 ℃.
Preferably, in above-mentioned cooling-water machine varying load system control method, the number of compressors of described predetermined number of units is respectively 2,4 or 6.
Cooling-water machine varying load system provided by the invention, for the simulation to cooling-water machine system bearing load, comprise water tank and with the varying load pipeline of water tank conducting, varying load pipeline is communicated with the heat interchanger heat exchange of cooling-water machine system.In water tank, liquid is through the circulation of varying load pipeline, and flow process carries out after heat exchange through the heat interchanger of cooling-water machine system, and the liquid after being cooled flows back in water tank.Between the intake line of varying load pipeline and output pipe, be connected with pipe branch road, intake line is connected by three-way control valve with pipe branch road.Cooled liquid flows back into before water tank, part liquid is shunted through the intake line of varying load pipeline and the pipe branch road between output pipe, make a cooled liquid part flow to water tank, a part is fed directly to intake line the liquid flowing out in water tank is lowered the temperature, by fluid flow in three-way control valve adjustable pipe branch road, can realize water temperature in intake line is controlled.By being set, three-way control valve regulates the flow direction and the flow of cooling rear liquid in varying load pipeline, making varying load pipeline can realize different temperature environments sets, thereby make the load end of cooling-water machine system can simulate different temperature environments, realized and utilized cooling-water machine system self to produce cold to carry out heat in varying load pipeline and blend, without dropping into other equipment, prepare load temperature environment, reduced testing cost.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the syndeton schematic diagram of cooling-water machine varying load system provided by the invention;
Fig. 2 is the dynamic acceleration and deceleration curves figure of the corresponding load of 2 compressors;
Fig. 3 is the dynamic acceleration and deceleration curves figure of the corresponding load of 4 compressors;
Fig. 4 is the dynamic acceleration and deceleration curves figure of the corresponding load of 6 compressors.
Embodiment
The invention discloses a kind of cooling-water machine varying load system, reduced the cost that cooling-water machine carries out varying loading test; The present invention also provides a kind of cooling-water machine varying load system control method.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out to clear, complete description, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on embodiments of the invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, Fig. 1 is the syndeton schematic diagram of cooling-water machine varying load system provided by the invention.
The invention provides a kind of cooling-water machine varying load system, for the simulation to cooling-water machine system 1 bearing load, comprise water tank 21 and with the varying load pipeline 23 of water tank 21 conductings, varying load pipeline 23 is communicated with heat interchanger 14 heat exchange of cooling-water machine system 1.The interior liquid of water tank 21 is through 23 circulations of varying load pipeline, and flow process carries out after heat exchange through the heat interchanger 14 of cooling-water machine system 1, and the liquid after being cooled flows back in water tank 21.Between the intake line 232 of varying load pipeline 23 and output pipe 233, be connected with pipe branch road 231, output pipe 233 is connected by three-way control valve 22 with pipe branch road 231.Cooled liquid flows back into before water tank 21, part liquid is shunted through the intake line 232 of varying load pipeline 23 and the pipe branch road 231 between output pipe 233, make a cooled liquid part flow to water tank 21, a part is fed directly to the liquid flowing out in 232 pairs of water tanks of intake line and lowers the temperature, by the interior fluid flow of three-way control valve 22 adjustable pipe branch road 231, can realize the interior water temperature of intake line 232 is controlled.By being set, three-way control valve 22 regulates the flow direction and the flow of varying load pipeline 23 interior cooling rear liquid, making varying load pipeline 23 can realize different temperature environments sets, thereby make the load end of cooling-water machine system 1 can simulate different temperature environments, realized and utilized cooling-water machine system 1 self to produce cold to carry out the interior heat of varying load pipeline 23 and blend, without dropping into other equipment, prepare load temperature environment, reduced experimentation cost.
Water tank 21 is through the path of intake line 232 C-B-A inflow heat exchanger 14, then through the path of output pipe 233 F-E-D, flow back in water tank, wherein a part of chilled water flows into intake line 232 through the path E-B of pipe branch road 231, realizes the interior water conservancy in varying load path 23 is lowered the temperature with the cold of cooling rear water.
In the present invention's one specific embodiment, on intake line 23, be provided with the flowmeter 24 that total flow in it is measured.Flowmeter 24 is arranged on the output terminal and the intake line 232 after pipe branch road 231 of water tank 21, in order to the total flow on intake line 232 is measured.
In the present invention's one specific embodiment, intake line 232 is provided with power water pump 25 along its flow direction away from a side of managing branch road 231.Power water pump 25 is set on intake line 232 simultaneously, and power water pump 25 provides water tank 21 to flow out on intake line 232, and pipe branch road 231 flow into outputting power total on intake line 232, realize the circulation of the interior liquid of water tank 21 in varying load pipeline 23.In water tank 21, it is chilled water.
In the present invention's one specific embodiment, water tank 21 is constant temperature water tank, and constant temperature water tank water temperature is 18-25 ℃.Water tank 21 is set to constant temperature water tank, can avoid the water temperature in 21 pairs of varying load pipelines 23 of water tank to exert an influence, and has got rid of the interior water temperature of water tank 21 as far as possible and has changed the impact on cooling-water machine varying load system 2 test results.Constant temperature water tank is set to 18-25 ℃, makes the try one's best actual application environment of analog subscriber of the working environment of varying load system.
Preferably, constant temperature water tank water temperature is 20 ℃.
In the present invention's one specific embodiment, input end and output terminal that varying load pipeline 23 connects heat interchanger 14 are respectively arranged with the first temperature measuring equipment 26 of the temperature measurement in varying load pipeline and the second temperature measuring equipment 27.Varying load pipeline 23 arranges respectively the first temperature measuring equipment 26 and the second temperature measuring equipment 27 with input end and the output terminal of the heat exchange side of heat interchanger 14, with the variation to the interior liquid of varying load pipeline 23 water temperature after heat exchange in real time, be convenient to the real-time adjusting of cooling-water machine varying load system 2 and accurately detect.
In the present invention's one specific embodiment, cooling-water machine system 1 comprises compressor train 11, condenser 12 and the heat interchanger 14 of pipeline UNICOM, and compressor train 11 comprises that four and every compressor group comprise 2 compressors.In cooling-water machine system 1, compressor operating provides cooling power, and condenser 12 work are carried out heat exchange in conjunction with heat interchanger 14 by the interior water temperature of varying load pipeline 23, realize the cooling to liquid in varying load pipeline 23.Throttle mechanism 13 is set on the pipeline of cooling-water machine system 1 simultaneously, refrigerant is regulated.Heat interchanger 14 is plate type heat exchanger, and the heat exchange structure being connected with plate type heat exchanger is set on varying load pipeline 23.
Cooling-water machine varying load system based on providing in above-described embodiment, the present invention also provides a kind of cooling-water machine varying load system control method, is applied to cooling-water machine system and cooling-water machine varying load system simulation varying load, cooling-water machine system is realized to varying load test.
Particularly, in when test, open and regulate water pump 25, and the water temperature of setting the first temperature measuring equipment 26 positions is the first design temperature.During test, after cooling-water machine system 1 is communicated with cooling-water machine varying load system 2, open and regulate water pump 25, make the interior liquid of water tank 21 in the interior circulation of varying load pipeline 23, setting the first temperature measuring equipment 26 position water temperatures is the first design temperature, then opens cooling-water machine system 1 and carries out the cooling work to varying load pipeline 23 interior water temperatures.
Open the compressor of predetermined number of units, regulate three-way control valve 22 apertures constant to guarantee the first design temperature, and record the now loading aperture of three-way control valve 22.Cooling-water machine system 1 is interior arranges a plurality of compressors, by opening the compressor of varying number, cooling-water machine system 1 is lowered the temperature by 14 pairs of varying load pipelines 23 of heat interchanger, three-way control valve 22 is diverted to the chilled water in a part of reflow tank 21 on intake line 232, by regulating the aperture chilled water of three-way control valve 22 to flow into intake line 232, water temperature in intake line 232 is reduced, open the compressor of varying number, after heat exchange, chilled water can obtain different cooling temperature, therefore the variation of different compressor operating number of units can obtain different three-way control valves 22 apertures, can arrange by the aperture of three-way control valve 22, acquisition is for the load of the cooling-water machine varying load system 2 of different number of compressors.
Set the aperture of three-way control valve 22 for loading aperture, and open the corresponding aperture situation lower compression machine quantity that loads, the start and stop that are recorded in all compressors under scheduled duration change.Obtaining compressor operating load corresponding to different three-way control valve 22, when regulating different three-way control valve 22 apertures, can realize the loading load different to 1 simulation of cooling-water machine system, thereby realize the checking of the duty under different load state to cooling-water machine system.
This case is by providing cooling-water machine varying load system 2, and set three-way control valve 22 apertures under the load condition of the cooling-water machine system 1 that cooling-water machine varying load system 2 is corresponding different, can utilize cooling-water machine varying load system 2 to realize cooling-water machine system 1 working condition test under varying load condition.
In the present invention's one specific embodiment, the first design temperature is 12 ℃.Cooling-water machine varying load system 2 simulation clients' actual service condition, is 12 ℃ by the first design temperature is set, and makes the test condition of cooling-water machine system approach client's actual application environment.
In the present invention's one specific embodiment, the number of compressors of predetermined number of units is respectively 2,4 or 6.Cooling-water machine system 1 inner compressor can be set respectively 2,4 or 6, and obtains the aperture of three-way control valve under corresponding compressor number of units.Obtain after the aperture of three-way control valve 22, by when cooling-water machine system 1 is tested, predetermined three-way control valve 22 apertures are set, under corresponding three-way control valve 22 apertures, the load of 22 times varying load system 1 correspondences of this three-way control valve, is the load of opening the cooling-water machine system under corresponding number of compressors.
Take and open two compressors as example, the aperture that obtains three-way control valve corresponding in the two compressor situations of unlatching is aperture A; Then when cooling-water machine system is carried out to load change test, when the aperture of three-way control valve is set to aperture A, the duty of cooling-water machine system is the duty under the corresponding load for two compressors.As shown in Figure 2, Fig. 2 is the dynamic acceleration and deceleration curves figure of the corresponding load of 2 compressors.
Curve 4 is opened number of units curve over time for compressor, when on-test, compressor start, now needs the cold that provides enough to lower the temperature to the water in varying load pipeline, for realizing as early as possible cooling, the unlatching quantity of carrying out compressor in time increases to after 4 platforms, and in varying load pipeline, water temperature is tending towards constant, and compressor is without too much refrigeration power is provided, close unnecessary compressor, after long-time, water temperature rises, and the unlatching of proceeding a plurality of compressors repeats temperature-fall period.
As shown in Figure 3, Fig. 3 is the dynamic acceleration and deceleration curves figure of the corresponding load of 4 compressors.
Curve 5 is opened number of units curve over time for compressor, during on-test, need 4 compressors that power is provided, and for realizing fast cooling in varying load pipeline, compressor is opened quantity and is increased to 5, in reaching varying load pipeline water temperature constant after, compressor is opened quantity and is reduced, after long-time, the opening and closing of repeated compression machine, to guarantee constant to water temperature in varying load pipeline.
As shown in Figure 4, Fig. 4 is the dynamic acceleration and deceleration curves figure of the corresponding load of 6 compressors.
Curve 6 is opened number of units curve over time for compressor, during on-test, 6 compressors are progressively opened water temperature in varying load pipeline are lowered the temperature, and progressively open 7 compressors and realize cooling work, water temperature is constant after a period of time, opens number of compressors and reduce, after a period of time, water temperature raises, continue above-mentioned cooling work, compressor repeats start and stop, keeps the interior water temperature of varying load pipeline constant.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a cooling-water machine varying load system, the simulation for to cooling-water machine system bearing load, is characterized in that, comprise water tank and with the varying load pipeline of described water tank conducting, described varying load pipeline is communicated with the heat interchanger heat exchange of described cooling-water machine system;
Between the intake line of described varying load pipeline and output pipe, be connected with pipe branch road, described intake line is connected by three-way control valve with described pipe branch road.
2. cooling-water machine varying load system according to claim 1, is characterized in that, is provided with the flowmeter that total flow in it is measured on described intake line.
3. cooling-water machine varying load system according to claim 2, is characterized in that, described intake line is provided with power water pump along its flow direction away from a side of described pipe branch road.
4. cooling-water machine varying load system according to claim 1, is characterized in that, described water tank is constant temperature water tank, and described constant temperature water tank water temperature is 18-25 ℃.
5. cooling-water machine varying load system according to claim 4, is characterized in that, described constant temperature water tank water temperature is 20 ℃.
6. cooling-water machine varying load system according to claim 1, it is characterized in that, input end and output terminal that described varying load pipeline connects described heat interchanger are respectively arranged with the first temperature measuring equipment of the temperature measurement in described varying load pipeline and the second temperature measuring equipment.
7. cooling-water machine varying load system according to claim 1, is characterized in that, described cooling-water machine system comprises compressor train, condenser and the heat interchanger of pipeline UNICOM, and described compressor train comprises that four and every compressor group comprise 2 compressors.
8. a cooling-water machine varying load system control method, is characterized in that, open to regulate water pump, and the water temperature of setting described the first temperature measuring equipment position is the first design temperature; Open the compressor of predetermined number of units, regulate three-way control valve aperture constant to guarantee the first design temperature, and record the now loading aperture of three-way control valve; Set the aperture of three-way control valve for loading aperture, and open the corresponding aperture situation lower compression machine quantity that loads, the start and stop that are recorded in all compressors under scheduled duration change.
9. cooling-water machine varying load system control method according to claim 8, is characterized in that, described the first design temperature is 12 ℃.
10. cooling-water machine varying load system control method according to claim 8, is characterized in that, the number of compressors of described predetermined number of units is respectively 2,4 or 6.
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| CN201410138445.6A CN103926098A (en) | 2014-04-08 | 2014-04-08 | Adjusting method for cooling-water machine load varying system and cooling-water machine load varying system |
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| CN201410138445.6A CN103926098A (en) | 2014-04-08 | 2014-04-08 | Adjusting method for cooling-water machine load varying system and cooling-water machine load varying system |
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Cited By (3)
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| CN106642776A (en) * | 2016-11-24 | 2017-05-10 | 深圳市天健机电设备有限公司 | Centralized water-cooling system |
| CN112098130A (en) * | 2020-09-15 | 2020-12-18 | 武汉汉立制冷科技股份有限公司 | Dynamic thermal load simulation device for testing optical fiber laser water chiller |
| WO2021103054A1 (en) * | 2019-11-28 | 2021-06-03 | 江苏苏净集团有限公司 | Multi-parallel carbon dioxide heat pump control method based on target load control |
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| CN112098130A (en) * | 2020-09-15 | 2020-12-18 | 武汉汉立制冷科技股份有限公司 | Dynamic thermal load simulation device for testing optical fiber laser water chiller |
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