CN102213466B - Thermal environmental control system - Google Patents
Thermal environmental control system Download PDFInfo
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- CN102213466B CN102213466B CN2011100950123A CN201110095012A CN102213466B CN 102213466 B CN102213466 B CN 102213466B CN 2011100950123 A CN2011100950123 A CN 2011100950123A CN 201110095012 A CN201110095012 A CN 201110095012A CN 102213466 B CN102213466 B CN 102213466B
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Abstract
The invention relates to a thermal environmental control system which comprises a cooling tower, a cooling tower fan, a water pump, a cooling tower water outlet pipe, a cooling tower water return pipe, a refrigerant circulating system, a low-temperature freezing water pipe, a high-temperature freezing water pipe, two water-heat pipe exchangers and two paths of air-heat pipe exchangers, wherein the refrigerant circulating system consists of a condenser, a compressor, a throttling device and an evaporator; each path of air-heat pipe exchangers is connected with one water-heat pipe exchanger and provided with a plurality of air-heat pipe exchangers which are arranged in parallel, the two water-heat pipe exchangers are serially connected between the low-temperature freezing water pipe and the high-temperature freezing water pipe, and the lower part of the cooling tower is provided with an outdoor air inlet. The thermal environment control system is characterized in that a shell inlet of the evaporator is connected with the cooling tower water outlet pipe, a shell outlet of the evaporator is connected with the high-temperature freezing water pipe; and a shell inlet of the condenser is connected with the high-temperature freezing water pipe, and a shell outlet of the condenser is connected with the cooling tower water return pipe. According to the invention, power consumption of the compressor in the process of reducing environment sensible heat is effectively reduced.
Description
Technical field
The present invention relates to a kind of thermal environmental control system, particularly about a kind of thermal environmental control system that is applicable to high sensible heat heat radiation density space.
Background technology
(sensible heat ratio is greater than 0.9 to the high sensible heat heat radiation density space that the information machine room of take is representative, and equipment heating density is 500~2000W/m
2) indoor Thermal Environment Control is had relatively high expectations.Existing Thermal Environment Control technology comprises compressor cooling and naturally freezes.Use compressor cooling, need the annual compressor of opening, require no matter how outdoor environment temperature changes, compressor is born the complete sensible heat load all the time, because compression ratio is fixed, even the compressor power consumption does not still obviously reduce when outdoor environment temperature is low, cause air conditioner in machine room whole year operation energy consumption higher.Naturally refrigeration comprises gravity-flow ventilation, air-to-air heat exchanger, heat pipe heat, the technology such as refrigerating medium heat exchange, but be all to pass through the switching refrigeration mode outside given chamber under operating mode, close compressor realizes that nature is cooling, opens again compressor and carry out mechanical refrigeration when outdoor environment can not meet the demands, and can not realize mechanical refrigeration and naturally cooling continuous conversion adjusting under operating mode outside different chamber.
Summary of the invention
For the problems referred to above, the purpose of this invention is to provide a kind of thermal environmental control system that is applicable to high sensible heat heat radiation density space, it can reduce the power consumption of compressor in reducing environment sensible heat process effectively.
For achieving the above object, the present invention takes following technical scheme: a kind of thermal environmental control system, comprise cooling tower, blower fan of cooling tower, water pump, the cooling tower outlet pipe, the cooling tower return pipe, by condenser, compressor, the refrigerant-cycle systems that throttling arrangement and evaporimeter form, the cryogenic freezing water pipe, the high temperature chilled water pipe, two water-heat exchange of heat pipes, two-way air-heat exchange of heat pipe, the described air in each road-heat exchange of heat pipe connects wherein one water-heat exchange of heat pipe, described air-the heat exchange of heat pipe in each road is be arranged in parallel a plurality of, described two water-heat exchange of heat pipes are connected in series between described cryogenic freezing water pipe and described high temperature chilled water pipe, described cooling tower bottom is provided with outside-air intake, be provided with a water pump between described evaporimeter and an adjacent described water-heat exchange of heat pipe, it is characterized in that: described evaporator shell import connects described cooling tower outlet pipe, and outlet connects described high temperature chilled water pipe, described condenser shell import connects described high temperature chilled water pipe, and outlet connects described cooling tower return pipe.
Be provided with heat exchange coil in described cooling tower, described heat exchange coil import connects described cooling tower return pipe, and outlet connects described cooling tower outlet pipe; Be provided with a spray feed pipe and a water pump between the shower at described spray column bottom and described cooling tower top.
Described outside-air intake is provided with the air precooling heat exchanger, and the heat exchanger tube import of described air precooling heat exchanger connects described cooling tower outlet pipe, and outlet connects the shower at described cooling tower top.
Described refrigerant-cycle systems is be arranged in parallel a plurality of, and the condenser shell of each described refrigerant-cycle systems is connected by pipeline, and the evaporator shell of each described refrigerant-cycle systems is connected by pipeline.
The present invention is owing to taking above technical scheme, it has the following advantages: 1, the present invention is because the housing of the evaporimeter by refrigerant-cycle systems advances, outlet connects respectively cooling tower outlet pipe and high temperature chilled water pipe, by advancing of described condenser shell, outlet connects respectively high temperature chilled water pipe and cooling tower return pipe, therefore indoor sensible heat load is all born by the cold water closed circuit of setting of the present invention, only have when the cooling tower leaving water temperature is higher and just need to cooling tower be gone out to be water-cooled to design temperature by compressor, therefore effectively reduced the load that compressor is born.2, the system that the present invention arranges is in the control of indoor sensible heat, when outside air temperature is low, if cooling tower outlet pipe temperature relatively approaches even the design temperature lower than chilled water, can close compressor, only rely on cooling water circulation loop to complete heat absorption and heat extraction, therefore realized the Thermal Environment Control of low energy consumption.3, the present invention is owing to being provided with many groups coolant circulating system in parallel in system, therefore can further improve the efficiency of compressor, and adjust the number of units of compressor operating according to the variation of outdoor environment, the uniform distribution compressor load, thus realized mechanical refrigeration and naturally cooling continuous adjusting conversion.The present invention is little to the change of prior art, but energy-saving effect and reduction equipment loss successful, and it can be widely used in the adjusting control of various thermal environments, during particularly the adjusting of high sensible heat heat radiation density space is controlled.
The accompanying drawing explanation
Fig. 1 is air-conditioning system schematic diagram of the prior art
Fig. 2 is the embodiment of the present invention 1 structural representation
Fig. 3 is the embodiment of the present invention 2 structural representations
Fig. 4 is the embodiment of the present invention 3 structural representations
Fig. 5 is the embodiment of the present invention 4 structural representations
The specific embodiment
In order to be well understood to thermal environmental control system provided by the invention, paper is air-conditioning system of the prior art once.
As shown in Figure 1, the air-conditioning system of prior art comprises cooling tower 1, blower fan of cooling tower 2, water pump 3, outside-air intake 4, cooling tower outlet pipe 5, cooling tower return pipe 6, condenser 7, compressor 8, throttling arrangement 9, cold-producing medium 10, evaporimeter 11, cryogenic freezing water pipe 12, water-the heat exchange of heat pipe 14,15 of 13, two series connection of high temperature chilled water pipe, two-way air-heat exchange of heat pipe 16,17 and indoor thermal source (such as server cabinet etc.) 18.
A plurality of air-the heat exchange of heat pipes 16 in the road water-heat exchange of heat pipe 14 that is connected in parallel wherein, a plurality of air-heat exchange of heat pipes 17 in another road water-heat exchange of heat pipe 15 that is connected in parallel, thermal source 18 is arranged in the space enclosed by each heat exchange of heat pipe 14,15,16,17; In the refrigerant-cycle systems that wherein cold-producing medium 10 forms at condenser 7, compressor 8, evaporimeter 11 and throttling arrangement 9, flow; Wherein cooling tower 1, water pump 3, cooling tower outlet pipe 5, condenser 7 housings and cooling tower return pipe 6 are connected to form a cooling water circulation loop; Cryogenic freezing water pipe 12, evaporimeter 11 housings, two water-heat exchange of heat pipes 14,15 and high temperature chilled water pipe 13 are connected to form a chilled water closed circuit.Be connected with a water pump 19 between evaporimeter 11 and water-heat exchange of heat pipe 14, water pump 19 is for controlled circulation discharge.
The heat that indoor thermal source 18 distributes is sent into water-heat exchange of heat pipe 14 via air-heat exchange of heat pipe 16, send into water-heat exchange of heat pipe 15 via air-heat exchange of heat pipe 17 simultaneously, be delivered to evaporimeter 11 by the chilled water closed circuit, again by compressor 8 actings, be delivered to cooling tower 1 via condenser 7 by cooling water circulation loop, hot gas rejects heat in the outside atmosphere environment by blower fan of cooling tower 2, and the water that falls into cooling tower 1 bottom continues circulation.The thermic load that the air-conditioning system of prior art is born due to compressor 7 is large, walks the whole year under the high compression ratio operating mode, and refrigerating efficiency is low, and power consumption is large.
Below in conjunction with drawings and Examples, thermal environmental control system provided by the invention is introduced.
Embodiment 1:
As shown in Figure 2, the thermal environmental control system that the present embodiment provides is with the difference of the air-conditioning system of prior art: the import of the condenser of refrigerant-cycle systems 7 housings is connected to high temperature chilled water pipe 13, and outlet connects cooling tower return pipe 6; The import of the evaporimeter of refrigerant-cycle systems 11 housings is connected to cooling tower outlet pipe 5, and outlet connects cryogenic freezing water pipe 12, thereby forms an open cooling column series connection cold water Cycle Unit.
During the present embodiment operation, generally need not start the compressor 8 of refrigerant-cycle systems, the heat that indoor thermal source 18 distributes is sent into water-heat exchange of heat pipe 14 via air-heat exchange of heat pipe 16, send into water-heat exchange of heat pipe 15 via air-heat exchange of heat pipe 17 simultaneously, and by the cooling tower series connection cold water Cycle Unit of setting of the present invention, the sensible heat load of thermal source is taken away, enter outside atmosphere by cooling tower 1.Only have when cooling tower outlet pipe 5 surpasses design temperature, compressor 8 is just opened, via evaporimeter 11, cooling tower outlet pipe 5 is cooled to the chilled water 12 of design temperature, water-the heat exchange of heat pipe 14,15 of flowing through successively, become high temperature chilled water pipe 13 after taking away indoor net quantity of heat, be heated to High-temperature cooling tower return pipe 6 via condenser 7, then enter cooling tower 1 heat extraction, complete circulation.
Embodiment 2:
As shown in Figure 3, difference between the thermal environmental control system that the present embodiment provides and embodiment 1 is: outside-air intake 4 places at cooling tower arrange air precooling heat exchanger 20, the heat exchanger tube import of air precooling heat exchanger 20 connects cooling tower outlet pipe 5, and outlet connects the shower at cooling tower 1 top.
During the present embodiment work, substantially the same manner as Example 1, difference is that outdoor air 4 needs first by entering in cooling tower 1 after 20 precoolings of air precooling heat exchanger, so that the leaving water temperature of cooling tower 1 approaches the air dew point temperature again.Outside identical chamber under working condition, the present embodiment can further reduce the load that compressor 8 is born, and further reduces the refrigeration power consumption of compressor 8 like this.
Embodiment 3:
As shown in Figure 4, difference between the thermal environmental control system that the present embodiment provides and embodiment 1 is: be provided with coiled coil or turn round heat exchange coil in a row 21 in cooling tower 1, and heat exchange coil 21 imports are connected to cooling tower return pipe 6, outlet connects cooling tower outlet pipe 5, and then forms the cooling tower tandem cold water Cycle Unit of a sealing.Draw a spray feed pipe 22 and a water pump 23 in cooling tower 1 bottom, to the shower water supply at cooling tower 1 top simultaneously.
During the present embodiment work, substantially the same manner as Example 1, difference is that the cold water of periodic duty is to enter cooling tower 1 via coil pipe 21, again with spray column 1 in air, shower water heat exchange, can effectively improve like this rough sledding such as heat exchange manifold fouling of water quality in the cooling tower 1 interior initiation of open type, remain the unimpeded of cooling water circulation stream.
Embodiment 4:
As shown in Figure 5, the difference between the thermal environmental control system that the present embodiment provides and embodiment 1 or embodiment 2 or embodiment 3 is: in open or cooling tower tandem cold water Cycle Unit sealing, be arranged in parallel a plurality of refrigerant-cycle systems.Condenser 7 housings in each refrigerant-cycle systems are connected by pipeline, and evaporimeter 11 housings in each refrigerant-cycle systems are connected by pipeline.Can make so every compressor 8 keep close compression ratio and the work temperature difference, further improve the efficiency of compressor 8; Simultaneously can be according to the variation of outdoor environment (cooling tower outlet pipe 5 temperature), or, according to the variation that enters coolant-temperature gage of evaporimeter 11, automatically adjust compressor 8 operation number of units, the uniform distribution load, realize that mechanical refrigeration and naturally cooling continuous adjusting change.
During the present embodiment work, when outside air temperature is low, if cooling tower outlet pipe 5 temperature relatively approach, even lower than the design temperature of chilled water 12, perhaps evaporimeter 11 enter coolant-temperature gage lower than design temperature the time, can close compressor 8, only rely on cooling water circulation loop to complete heat absorption and heat extraction, realize the Thermal Environment Control of low energy consumption.
The various embodiments described above are only for illustrating the present invention; wherein the structure setting in each embodiment can change to some extent with being connected not only; and can intersect and be combined with; every equivalents of carrying out on the basis of technical solution of the present invention and improvement, all should not get rid of outside protection scope of the present invention.
Claims (4)
1. a thermal environmental control system, comprise cooling tower, blower fan of cooling tower, water pump, the cooling tower outlet pipe, the cooling tower return pipe, by condenser, compressor, the refrigerant-cycle systems that throttling arrangement and evaporimeter form, the cryogenic freezing water pipe, the high temperature chilled water pipe, two water-heat exchange of heat pipes, two-way air-heat exchange of heat pipe, the described air in each road-heat exchange of heat pipe connects wherein one water-heat exchange of heat pipe, described air-the heat exchange of heat pipe in each road is be arranged in parallel a plurality of, described two water-heat exchange of heat pipes are connected in series between described cryogenic freezing water pipe and described high temperature chilled water pipe, described cooling tower bottom is provided with outside-air intake, be provided with a water pump between described evaporimeter and an adjacent described water-heat exchange of heat pipe, it is characterized in that: described evaporator shell import connects described cooling tower outlet pipe, and outlet connects described cryogenic freezing water pipe, described condenser shell import connects described high temperature chilled water pipe, and outlet connects described cooling tower return pipe.
2. thermal environmental control system as claimed in claim 1, it is characterized in that: described outside-air intake is provided with the air precooling heat exchanger, the heat exchanger tube import of described air precooling heat exchanger connects described cooling tower outlet pipe, and outlet connects the shower at described cooling tower top.
3. thermal environmental control system as claimed in claim 1, it is characterized in that: be provided with heat exchange coil in described cooling tower, described heat exchange coil import connects described cooling tower return pipe, and outlet connects described cooling tower outlet pipe; Be provided with a spray feed pipe and a water pump between the shower at described cooling tower bottom and described cooling tower top.
4. as claim 1 or 2 or 3 described thermal environmental control systems, it is characterized in that: described refrigerant-cycle systems is be arranged in parallel a plurality of, the condenser shell of each described refrigerant-cycle systems is connected by pipeline, and the evaporator shell of each described refrigerant-cycle systems is connected by pipeline.
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CN2011100950123A CN102213466B (en) | 2011-04-15 | 2011-04-15 | Thermal environmental control system |
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CN2011100950123A CN102213466B (en) | 2011-04-15 | 2011-04-15 | Thermal environmental control system |
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CN102213466B true CN102213466B (en) | 2013-12-11 |
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CN105451508B (en) * | 2014-09-22 | 2018-11-13 | 中国移动通信集团广东有限公司 | A kind of fluorine pump internal-circulation type secondary refrigerant loop server cabinet cooling system |
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CN111457509B (en) * | 2020-03-30 | 2021-10-19 | 上海海事大学 | Energy-saving air conditioner |
CN114234666B (en) * | 2021-12-20 | 2023-09-05 | 中车株洲电力机车有限公司 | Electric locomotive, double-loop cooling tower thereof and control method |
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