CN102519098B - Variable-pressure sealed type evaporative cooling refrigeration system - Google Patents
Variable-pressure sealed type evaporative cooling refrigeration system Download PDFInfo
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- CN102519098B CN102519098B CN2011104279922A CN201110427992A CN102519098B CN 102519098 B CN102519098 B CN 102519098B CN 2011104279922 A CN2011104279922 A CN 2011104279922A CN 201110427992 A CN201110427992 A CN 201110427992A CN 102519098 B CN102519098 B CN 102519098B
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Abstract
The invention relates to a variable-pressure sealed type evaporative cooling refrigeration system, which belongs to the technical field of energy equipment. A sealed evaporation cooler in the refrigeration system comprises a reverse-flow filled tower or spray tower filler core and a pressure container, wherein the filler core is disposed in the middle of the pressure container. A compressor is connected with a space above the filler core inside the pressure container. An expander is connected with a space below the filler core inside the pressure container. A circulating water pump is disposed on a pipeline by which an outlet of a low-temperature cold source is communicated with the pressure container. A spray nozzle is disposed above the filler core inside the pressure container and connected with an inlet of the low-temperature cold source. The variable-pressure sealed type evaporative cooling refrigeration system can be used to obtain a lower-temperature cold source in a dry area, and an evaporative cooling system can be independently used to dehumidify and cool the environment in a highly humid area, so that energy utilization rate is increased, and the evaporative cooling refrigeration technique which is economical, energy-saving and environment-friendly is widely applied.
Description
Technical field
The present invention relates to a kind of variable-pressure sealed type evaporative cooling refrigeration system, belong to the energy resource apparatus and technology field.
Background technology
Along with the raising of quality of the life, when utilizing HVAC (HVAC) system to build comfortable, healthy architectural environment, also caused the remarkable increase of energy consumption.Current, approximately the energy of 20% left and right is consumed by HVAC (HVAC) system, so in the HVAC system, the efficient utilization of the energy seems more very urgent.Because the humid air in environment has the characteristics such as clean and low-cost, make evaporative cooling, utilize unsaturated humid air directly to contact with water, at steam partial pressure, under poor effect, make the aqueous water evaporation endothermic obtain broad development and application with the technology that obtains low-temperature cold water.
Evaporative cooling system is mainly by the installation composition of the various combination pattern such as direct evaporative cooling, indirect evaporation is cooling.Evaporation cooling technique is exactly to utilize the potential difference of steam partial pressure and water surface saturated steam partial pressure humid air to drive refrigeration from essence.Air humidity is less, and this potential difference is larger.Under limiting case, the potential difference maximum that dry air has.Therefore evaporation cooling technique generally is applied to the area of drying or relatively dry, and in some relative humid areas, such as Xi'an, Zhengzhou, Lanzhou and Beijing of China, Tianjin and other places, be not enough to produce the low-temperature cold water of uniform temperature because potential difference is too little, cause the evaporative cooling system scope of application to be subject to certain limitation.It shown in Fig. 1, is a kind of schematic diagram of existing evaporative cooling circulation, humid air directly enters in sealed evaporation-cooled device 3 and directly contacts with recirculated water, utilize the steam partial pressure official post aqueous water evaporation between humid air and water surface saturated moist air to absorb latent heat, reach the effect of refrigeration, the humid air after moisture absorption is discharged by blower fan 12 again.Cooling water is extracted out and is exported cold as low-temperature receiver for the user by water circulating pump 2.
Summary of the invention
The objective of the invention is to propose a kind of variable-pressure sealed type evaporative cooling refrigeration system, take and break through the restriction that existing evaporative cooling system cooling limit temperature is new wind entrance dew-point temperature, enlarge the range of application of vaporation cooling refrigeration.
The variable-pressure sealed type evaporative cooling refrigeration system that the present invention proposes, comprise: decompressor, compressor, sealed evaporation-cooled device, drenching sprayer, water circulating pump and pressure-reducing valve, described sealed evaporation-cooled device is comprised of filler core and the pressure vessel of countercurrent filling tower (or spray column), and the filler core is placed in the middle part of pressure vessel; Described compressor is connected with the space on filler core top in pressure vessel; Described decompressor is connected with the space of filler core bottom in pressure vessel; Described water circulating pump is placed in low temperature cold source and goes out on the pipeline be connected with pressure vessel; Described drenching sprayer is placed in the top of filler core in pressure vessel, and drenching sprayer returns and is connected with low temperature cold source; Described pressure-reducing valve is placed in the moisturizing entrance.
The variable pressure sealed evaporative cooling system that the present invention proposes, add decompressor in the humid air porch on the basis of original evaporative cooling system, make to enter evaporative cooling system after humid air expansion cooling, then air is entered in compressor after reverting to atmospheric pressure again and discharge, whole cooling flow is in the low pressure seal state.It is advantageous that transpiration-cooled cooling limit temperature will be lower than the dew-point temperature of entrance humid air, can obtain at Arid Area the low-temperature receiver that temperature is lower, area for humidity large (dew-point temperature is higher), as even also can independently used evaporative cooling system to environment dehumidifying and cooling in the ground such as Beijing, Tianjin in Xi'an, Zhengzhou, Lanzhou, and make the Refrigeration Technique scope of application of this economy of evaporative cooling, energy-saving and environmental protection become wide.On the other hand, the refrigeration system that the present invention proposes can realize the output of two temperature low-temperature receiver.Wherein low temperature cold source can be for realizing dehumidifying, and middle temperature low-temperature receiver can be lowered the temperature for realizing, thereby realized the principle of " temperature counterpart, cascade utilization ", improved efficiency of energy utilization.
The accompanying drawing explanation
Fig. 1 is the structural representation of existing type evaporative cooling refrigeration system.
Fig. 2 is the structural representation of the variable-pressure sealed type evaporative cooling refrigeration system that proposes of the present invention.
Fig. 3～Fig. 9 is respectively the structural representation of the embodiment of the present invention.
In Fig. 1～Fig. 9, the 1st, decompressor, the 2nd, water circulating pump, the 3rd, sealed evaporation-cooled device, the 4th, filler core, the 5th, pressure vessel, the 6th, drenching sprayer, the 7th, compressor, the 8th, pressure-reducing valve, the 9th, air precooler, the 10th, heat exchanger, the 11st, regenerator, the 12nd, blower fan.Sealed evaporation-cooled device 3 is comprised of filler core 4 and pressure vessel 5.
The specific embodiment
The variable-pressure sealed type evaporative cooling refrigeration system that the present invention proposes, its structure as shown in Figure 2, comprise: decompressor 1, compressor 7, sealed evaporation-cooled device 3, drenching sprayer 6, water circulating pump 2 and pressure-reducing valve 8, described sealed evaporation-cooled device 3 is comprised of filler core 4 and pressure vessel 5, and filler core 4 is placed in the middle part of pressure vessel 5; Described compressor 7 is connected with the space on the interior filler core of pressure vessel 54 tops; Described decompressor 1 is connected with the space of the interior filler core of pressure vessel 54 bottoms; Described water circulating pump 2 is placed in low temperature cold source and goes out on the pipeline be connected with pressure vessel 5; Described drenching sprayer 6 is placed in the top of the interior filler core 4 of pressure vessel 5, and drenching sprayer 6 returns and is connected with low temperature cold source; Described pressure-reducing valve 8 is placed in the moisturizing entrance.
The variable-pressure sealed type evaporative cooling refrigeration system that the present invention proposes is compared to the existing type evaporative cooling refrigeration system shown in Fig. 1, is mainly that the entrance at new wind has increased decompressor 1, increased compressor 7 at the system outlet place so that exhaust recovers atmospheric pressure simultaneously.Whole circulation, under the low pressure seal state, realizes with pressure vessel 5.This system is to realize the transpiration-cooled single system of variable pressure sealed, is applicable to the new rheumatism degree of import larger, and temperature is lower, and the occasion lower than the low temperature cold source of the new wind dew-point temperature of import only need to be provided.
The operation principle of the variable pressure sealed evaporative cooling system that the present invention proposes is: after humid air expands by decompressor 1, evaporative cooling occurs under low pressure and between recirculated water and produce the low temperature cold, the recirculated water water temperature of sealed evaporation-cooled device 3 outlets can be lower than the dew-point temperature of the new wind of import.Then, humid air is discharged to atmospheric pressure in the effect lower compression of compressor 7.On the other hand, under the driving of water circulating pump 2, the recirculated water after cooling provides low temperature cold source for user side, and the backwater after intensification adds to enter after the moisturizing of pressure-reducing valve 8 in sealed evaporation-cooled device 3 and recycles.
Evaporative cooling system of the present invention, can also have following different embodiment.
As shown in Figure 3, this cooling refrigeration system also comprises air precooler 9, heat exchanger 10 and regenerator 11, and described air precooler 9 is connected on the connecting pipe of decompressor 1 and pressure vessel 5 and low temperature cold source and returns on the connecting pipe that goes out with low temperature cold source; Described regenerator 11 is connected between decompressor 1 and compressor 7; Described heat exchanger 10 is connected between pressure vessel 5 and compressor 7, and heat exchanger 10 is provided with middle temperature low-temperature receiver and advances with middle temperature low-temperature receiver.This system mainly comprises that three parts form: 1, transformation part, and be included in traditional evaporative cooling system front end and add decompressor, be that whole system is built environment under low pressure, and the air exit place add compressor, make exhaust recover to discharge after atmospheric pressure; 2, evaporative cooling part, sealed evaporation-cooled device outlet can obtain the chilled water lower than humid air import dew-point temperature, supply with the user as low temperature cold source, the low temperature cold source here is mainly used in dehumidifying, and the humid air of the sealed evaporation-cooled device of discharge after heating up can provide middle temperature low-temperature receiver for the user, middle temperature low-temperature receiver herein is mainly used in cooling; 3, backheat part, the new wind of import and the heat exchange of compressor outlet humid air, recover energy.
As shown in Figure 4, cooling refrigeration system of the present invention also comprises: air precooler 9, described air precooler 9 is connected on the connecting pipe of decompressor 1 and pressure vessel 5 and low temperature cold source and returns on the connecting pipe that goes out with low temperature cold source.This embodiment is applicable to that the new rheumatism degree of import is medium, and temperature is lower, and only need to export the occasion lower than the low temperature cold source of the new wind dew-point temperature of import.
As shown in Figure 5, cooling refrigeration system of the present invention, also comprise heat exchanger 10, and described heat exchanger 10 is connected between pressure vessel 5 and compressor 7, and heat exchanger 10 is provided with middle temperature low-temperature receiver and advances with middle temperature low-temperature receiver.This embodiment is applicable to that new rheumatism degree is larger, and temperature is lower, and exports the occasion lower than the low temperature cold source for dehumidifying of the new wind dew-point temperature of import and warm low-temperature receiver that air is lowered the temperature simultaneously.
As shown in Figure 6, cooling system of the present invention, also comprise regenerator 11, and described regenerator 11 is connected between decompressor 1 and compressor 7.This embodiment is applicable to that the new rheumatism degree of import is larger, and temperature is higher, and only need to export the occasion lower than the low temperature cold source of the new wind dew-point temperature of import.
As shown in Figure 7, cooling refrigeration system of the present invention also comprises air precooler 9 and heat exchanger 10, and described air precooler 9 is connected on the connecting pipe of decompressor 1 and pressure vessel 5 and low temperature cold source and returns on the connecting pipe that goes out with low temperature cold source; Described heat exchanger 10 is connected between pressure vessel 5 and compressor 7, and heat exchanger 10 is provided with middle temperature low-temperature receiver and advances with middle temperature low-temperature receiver.It is lower that this embodiment is applicable to new wind humidity and temperature, and export the occasion that reaches the warm low-temperature receiver that air is lowered the temperature lower than the low temperature cold source for dehumidifying of the new wind dew-point temperature of import simultaneously.
As shown in Figure 8, cooling refrigeration system of the present invention, also comprise heat exchanger 10 and regenerator 11, and described regenerator 11 is connected between decompressor 1 and compressor 7; Described heat exchanger 10 is connected between pressure vessel 5 and compressor 7, and heat exchanger 10 is provided with middle temperature low-temperature receiver and advances with middle temperature low-temperature receiver.It is higher that this embodiment is applicable to new wind humidity and temperature, and export the occasion that reaches the warm low-temperature receiver that air is lowered the temperature lower than the low temperature cold source for dehumidifying of the new wind dew-point temperature of import simultaneously.
As shown in Figure 9, cooling refrigeration system of the present invention, also comprise air precooler 9 and regenerator 11, and described air precooler 9 is connected on the connecting pipe of decompressor 1 and pressure vessel 5 and low temperature cold source and returns on the connecting pipe that goes out with low temperature cold source; Described regenerator 11 is connected between decompressor 1 and compressor 7.This embodiment is applicable to that the new rheumatism degree of import is medium, and temperature is higher, and only need to export the occasion lower than the low temperature cold source of the new wind dew-point temperature of import.
In cooling refrigeration system of the present invention, aerial cooler used, can be adverse current tubular type/plate type heat exchanger, as: the GS type adverse current plate heat exchanger that German Klingenburg GmbH produces.Heat exchanger used, can be adverse current tubular type/plate type heat exchanger, as: the plate type heat exchanger that special thermal hardware Co., Ltd of Beijing Cherry produces.Regenerator used, can be adverse current tubular type/plate type heat exchanger, as: the pipe heat exchanger that Shenyang Yongye Industry Co., Ltd. produces.Compressor used can be compressor, as: the LU series helix rod-type air compressor that Beijing permanent Talon Compressor Manufacturing factory produces.Decompressor used can be turbo-expander, as: the turbo-expander that the north, Harbin air separation plant Co., Ltd produces.Sealed evaporation-cooled device used comprises that pressure vessel and filler core or spray column core form, wherein, and the pressurized tank that pressure vessel can select Fengtai, Beijing Wan Quan pressure vessel factory to produce; The used for cooling tower pvc filler that the filler core can select Hebei Huaqiang Technology Development Co., Ltd to produce.
Claims (8)
1. a variable-pressure sealed type evaporative cooling refrigeration system, it is characterized in that this type evaporative cooling refrigeration system comprises: decompressor, compressor, sealed evaporation-cooled device, drenching sprayer, water circulating pump and pressure-reducing valve, described sealed evaporation-cooled device is comprised of filler core and pressure vessel, and the filler core is placed in the middle part of pressure vessel; Described compressor is connected with the space on filler core top in pressure vessel; Described decompressor is connected with the space of filler core bottom in pressure vessel; Described water circulating pump is placed in low temperature cold source and goes out on the pipeline be connected with pressure vessel; Described drenching sprayer is placed in the top of filler core in pressure vessel, and drenching sprayer returns and is connected with low temperature cold source; Described pressure-reducing valve is placed in the moisturizing porch.
2. type evaporative cooling refrigeration system as claimed in claim 1, it is characterized in that this type evaporative cooling refrigeration system also comprises air precooler, heat exchanger and regenerator, described air precooler is connected on the connecting pipe of decompressor and pressure vessel and low temperature cold source and returns on the connecting pipe that goes out with low temperature cold source; Described regenerator is connected between decompressor and compressor; Described heat exchanger is connected between pressure vessel and compressor, and heat exchanger is provided with middle temperature low-temperature receiver and advances with middle temperature low-temperature receiver.
3. type evaporative cooling refrigeration system as claimed in claim 1, it is characterized in that this type evaporative cooling refrigeration system also comprises: air precooler, described air precooler is connected on the connecting pipe of decompressor and pressure vessel and low temperature cold source and returns on the connecting pipe that goes out with low temperature cold source.
4. type evaporative cooling refrigeration system as claimed in claim 1, is characterized in that this type evaporative cooling refrigeration system also comprises heat exchanger, and described heat exchanger is connected between pressure vessel and compressor, and heat exchanger is provided with middle temperature low-temperature receiver and advances with middle temperature low-temperature receiver.
5. type evaporative cooling refrigeration system as claimed in claim 1, is characterized in that this type evaporative cooling refrigeration system also comprises regenerator, and described regenerator is connected between decompressor and compressor.
6. type evaporative cooling refrigeration system as claimed in claim 1, it is characterized in that this type evaporative cooling refrigeration system also comprises air precooler and heat exchanger, described air precooler is connected on the connecting pipe of decompressor and pressure vessel and low temperature cold source and returns on the connecting pipe that goes out with low temperature cold source; Described heat exchanger is connected between pressure vessel and compressor, and heat exchanger is provided with middle temperature low-temperature receiver and advances with middle temperature low-temperature receiver.
7. type evaporative cooling refrigeration system as claimed in claim 1, is characterized in that this type evaporative cooling refrigeration system also comprises heat exchanger and regenerator, and described regenerator is connected between decompressor and compressor; Described heat exchanger is connected between pressure vessel and compressor, and heat exchanger is provided with middle temperature low-temperature receiver and advances with middle temperature low-temperature receiver.
8. type evaporative cooling refrigeration system as claimed in claim 1, it is characterized in that this type evaporative cooling refrigeration system also comprises air precooler and regenerator, described air precooler is connected on the connecting pipe of decompressor and pressure vessel and low temperature cold source and returns on the connecting pipe that goes out with low temperature cold source; Described regenerator is connected between decompressor and compressor.
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| CN2011104279922A CN102519098B (en) | 2011-12-19 | 2011-12-19 | Variable-pressure sealed type evaporative cooling refrigeration system |
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| CN2011104279922A CN102519098B (en) | 2011-12-19 | 2011-12-19 | Variable-pressure sealed type evaporative cooling refrigeration system |
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| CN102519098B true CN102519098B (en) | 2013-12-11 |
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| CN109341371A (en) * | 2018-10-11 | 2019-02-15 | 清华大学 | A kind of hot water facility, hot-water heating system and application method |
| CN110823325B (en) * | 2019-11-28 | 2020-12-01 | 徐州润物科技发展有限公司 | Leak-proof water meter calibrating installation |
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| CN1862121A (en) * | 2006-06-15 | 2006-11-15 | 清华大学 | Temp and moisture independent control type air-conditioning system using solution as auxiliary working substance |
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| US20090056353A1 (en) * | 2007-08-30 | 2009-03-05 | Hussmann Corporation | Refrigeration system including a flexible sensor |
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| CN1862121A (en) * | 2006-06-15 | 2006-11-15 | 清华大学 | Temp and moisture independent control type air-conditioning system using solution as auxiliary working substance |
| CN1865791A (en) * | 2006-06-15 | 2006-11-22 | 清华大学 | Cold supply device by using indirect evaporative cooling |
Non-Patent Citations (4)
| Title |
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| A new approach to analysis and optimization of evaporative cooling system II:Applications;Qun Chen;《Energy》;20110322;2890-2898 * |
| Qun Chen.A new approach to analysis and optimization of evaporative cooling system II:Applications.《Energy》.2011,2890-2898. |
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