CN102022788B - Indirect evaporation cooling water chiller and mechanical refrigeration handpiece Water Chilling Units air conditioning air-conditioning system - Google Patents
Indirect evaporation cooling water chiller and mechanical refrigeration handpiece Water Chilling Units air conditioning air-conditioning system Download PDFInfo
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Abstract
The invention discloses a kind of indirect evaporation cooling water chiller and mechanical refrigeration handpiece Water Chilling Units air conditioning air-conditioning system, in air processing machine casing, from air inlet to air outlet, successively one-level is installed, secondary surface formula heat exchanger and pressure fan, the outlet pipe of indirect evaporation water chiller is connected to the water inlet of the first-surface formula heat exchanger of air processing machine, the outlet pipe of first-surface formula heat exchanger is connected to the cooling water intake of Conventional cryogenic cooling-water machine, the cooling water outlet of Conventional cryogenic cooling-water machine is connected to the water inlet of indirect evaporation water chiller, the chilled water delivery port of Conventional cryogenic cooling-water machine is connected to the water inlet of secondary surface formula heat exchanger, the outlet pipe of secondary surface formula heat exchanger is connected to the indoor end water inlet being positioned at air-conditioned room, the outlet pipe of indoor end is connected to the chilled water water inlet of Conventional cryogenic cooling-water machine, the exhaust outlet of pressure fan leads to air-conditioned room by ajutage.The present invention not only uses in xeothermic area, and can be applied in damp-heat area, makes full use of the refrigerating capacity of dry air energy, realize the cascade utilization of energy, reduce equipment installed capacity, reduce equipment power load, improve the resh air requirement of air-conditioning system, improve indoor air quality.
Description
Technical field
The present invention relates to HVAC technical field, be applicable to the application, particularly a kind of indirect evaporation cooling water chiller in all kinds of building of middle humidity and high humility area and mechanical refrigeration handpiece Water Chilling Units air conditioning air-conditioning system.
Background technology
In traditional air-conditioning system, freon vapour compression refrigeration system uses electric power as the drive energy of refrigeration, lithium bromide absorbing type refrigeration then uses combustion gas or steam as the drive energy freezed, due to the feature that its refrigeration modes is intrinsic, creating the excessive use of such as Atmospheric Ozone Layer Depletion, the energy and resource, the in a large number discharge of greenhouse gases causes greenhouse effects to aggravate, and Cure of Sick Building Syndrome (Sick Building Syndrome, SBS) etc. destroys many adverse effects of indoor and outdoor surroundings.
Current China energy for building has exceeded 1/4 of national total energy consumption, and the raising along with living standards of the people is progressively increased to more than 1/3, and in energy for building, the energy consumption of HVAC has accounted for again about 27.4%, therefore vigorously advocate heat-air conditioner energy-saving, have vital effect for Resources for construction economizing type, environmentally friendly low-carbon type society.
Usually for comfort air conditioning system, the adjustment of indoor temperature and humidity is the major function of air-conditioning, and the effect of summer air-conditioning is lowered the temperature and dehumidification treatments to air, and the energy consumption duty wherein dehumidified adjusts about 30% ~ 50% of total energy consumption.
Within air-conditioning systems, to the temperature of the cooling processing requirements low-temperature receiver of air lower than the dry-bulb temperature of space air, the dehumidifying of air is then required to the dew-point temperature of temperature lower than room air of low-temperature receiver.Traditional air-conditioning system uses same low-temperature receiver lower the temperature to air and dehumidify, and is referred to as the wet Combined Treatment mode of heat.
Suppose to require that indoor temperature is 25 DEG C summer, relative humidity is 60%, and now corresponding dew-point temperature is 16.7 DEG C.The task of anthropogenic heat discharges sensible heat amount from the air of 25 DEG C, considers the heat transfer temperature difference of 10 DEG C, and corresponding sink temperature only needs 15 DEG C; The task of air conditioner dehumidification discharges moisture under the dew-point temperature of 16.7 DEG C, and consider the heat transfer temperature difference of 10 DEG C, then the temperature of low-temperature receiver is at about 7 DEG C.
Reality is the wet cooling condition fan coil+fresh air conditioner system of the many employings of central air-conditioning system based on traditional handpiece Water Chilling Units of China, the unified water at low temperature producing about 7 DEG C of handpiece Water Chilling Units processes indoor air temperature and humidity simultaneously, in air-conditioning system, the eliminating amount of sensible heat is generally about 50% of total amount of heat, this part heat that high temperature low-temperature receiver originally can be adopted namely can to drain also shares the low temperature cold source of 7 DEG C together with dehumidifying, therefore just causes the waste on Energy harvesting.
Meanwhile, central air-conditioning system is according to concerned countries standards and norms, according to different fields of employment, everyone must be provided minimum fresh air requirmente hourly, its essence is the requirement to health, be conducive to improving indoor air quality, but problem is in traditional air-conditioning system, why can not use new wind in a large number? as mentioned above, the unified 7 DEG C of chilled waters produced of handpiece Water Chilling Units, necessary for indoor air dehumidification (corresponding dew-point temperature be 16.7 DEG C), but sensible heat amount in decontamination chamber (corresponding air themperature is 25 DEG C) is then existed to the waste of Energy harvesting, if go process more than the new wind in the outdoor that indoor air temperature is high with the chilled water of 7 DEG C again, then again cause the huge waste of energy, and along with its quantity of increase of resh air requirement sharply rises, therefore, with the new wind of same low-temperature receiver process, relative to process indoor return air, more unreasonable at Energy harvesting, and energy consumption is larger, even if in the minimum fresh air requirmente situation that air-conditioning system requires, traditional new wind load has also accounted for 30% ~ 50% of system energy consumption.
Dry air can be a kind of renewable resource of preciousness, can be used to obtain the cold needed for summer air-conditioning, and namely when there being water source to exist, the ability of the external acting that dry air exists owing to being in undersaturated condition, is referred to as dry air energy.
Dry air energy sweat cooling technology utilizes dry air to obtain refrigerating capacity needed for air-conditioning exactly, in dissimilar evaporation-refrigeration device, utilize the hot and humid area of water and dry air obtain low temperature cold wind or (with) a kind of Refrigeration Technique of cold water.
Dry air energy sweat cooling technology, due to the advantage of its green, health, energy-saving and environmental protection, economic dispatch uniqueness, is widely used in xeothermic area especially Xinjiang region, achieves good effect.But humidity and high humility area in inland, because outdoor air water capacity is high, relative humidity is higher, independent application dry air energy sweat cooling technology, because temperature drop is limited, to fresh air dehumidification, the task of solving air-conditioning system heat extraction and hydrofuge can not be difficult to, therefore not obtain the enough attention of people and application for a long time.
Summary of the invention
The object of the present invention is to provide a kind of indirect evaporation cooling water chiller and mechanical refrigeration handpiece Water Chilling Units air conditioning air-conditioning system, have employed the air conditioning mode that dry air sweat cooling technology and Background Conventional chiller units combine, expand the region that sweat cooling air-conditioning is suitable for, not only use in xeothermic area, and can be applied in damp-heat area, make full use of the refrigerating capacity of dry air energy, realize the cascade utilization of energy, the installed capacity of equipment can be reduced, the power load of minimizing equipment, improve the resh air requirement of air-conditioning system, effectively improve indoor air quality.
The object of the present invention is achieved like this: a kind of indirect evaporation cooling water chiller and mechanical refrigeration handpiece Water Chilling Units air conditioning air-conditioning system, it is characterized in that: in the air processing machine casing with air inlet and air outlet, first-surface formula heat exchanger is installed successively from air inlet to air outlet, secondary surface formula heat exchanger and pressure fan, the outlet pipe of indirect evaporation water chiller is connected to the water inlet of the first-surface formula heat exchanger of air processing machine, the outlet pipe of first-surface formula heat exchanger is connected to the cooling water intake of Conventional cryogenic cooling-water machine, the cooling water outlet of Conventional cryogenic cooling-water machine is connected to the water inlet of indirect evaporation water chiller, the delivery port of the chilled water of Conventional cryogenic cooling-water machine is connected to the water inlet of secondary surface formula heat exchanger, the outlet pipe of secondary surface formula heat exchanger is connected to the indoor end water inlet being positioned at air-conditioned room, the outlet pipe of indoor end is connected to the chilled water water inlet of Conventional cryogenic cooling-water machine, the exhaust outlet of pressure fan leads to air-conditioned room by the ajutage that air processing machine air outlet is installed.
Air-conditioning system solution of the present invention can according to different meteorological areas, or the area determined, under meteorological conditions different in different time sections, based on the principle of energy cascade Optimum utilization, in the utilization of energy more rationally, fully; Different low-temperature receivers is adopted to process outdoor air and room air, especially, because components of system as directed have employed the air conditioning mode that energy-conservation dry air sweat cooling technology and conventional refrigeration combine, the air conditioning processing scheme of optimization is achieved in middle humidity and high humility area, air conditioning is carried out to indoor, and the energy saving achieved in running regulates.
Energy saving can be realized easily regulate, add the form of system in combination application, be easy to and build cooperation, the installed capacity of equipment can be effectively reduced, the power load of minimizing equipment, takies interior architecture area less, correspondingly improves the utilization rate of space.Owing to have employed energy-saving and environmental protection, green, healthy dry air energy sweat cooling technology in systems in which, the efficiency of Energy harvesting is higher, the application of the energy realizes " classified utilization, Optimized Matching ", and the refrigerating capacity of maximum using dry air energy, realizes the cascade utilization of energy.The Energy Efficiency Ratio of system is better than traditional air-conditioning system, and the present invention is the high-quality air-conditioning system solution based on energy-conserving product technology; On the other hand, because this air-conditioning system is in running, according to outdoor weather condition, can divide season, carry out energy saving adjustment at times, air-conditioning solution is more reasonable, the energy saving of further raising system.
The present invention has expanded the region that sweat cooling air-conditioning is suitable for, and not only uses in xeothermic area, more well can be applied in damp-heat area.The refrigerating capacity of maximum using dry air energy, realizes the cascade utilization of energy.While energy-conservation, the resh air requirement of air-conditioning system can be made farthest to be improved, effectively improve indoor air quality.
Present invention employs the air conditioning mode that dry air energy sweat cooling technology and conventional refrigeration combine, widen the region that sweat cooling air-conditioning uses, not only use in xeothermic area, and the application achieved in warm area, make full use of the refrigerating capacity of dry air energy, achieve the cascade utilization of energy, reduce the installed capacity of equipment, decrease the power load of equipment, improve the resh air requirement of air-conditioning system, effectively improve indoor air quality.
Indirect evaporation water chiller refers to the handpiece Water Chilling Units utilizing dry air to freeze, as described in a kind of method of patent 1, indirectly evaporating cold supply and device (grant number 02100431.5) thereof and patent 2, sweat cooling handpiece Water Chilling Units (application number 200610164414.3) claim.The refrigerating medium that indirect evaporation water chiller exports is high temperature cold water, and the scope of leaving water temperature is between local outdoor air dew point and wet-bulb temperature.Indirect evaporation water chiller is divided into have a narrow range of temperature greatly flow type and the large series of little temperature difference large discharge type two, and maximum user's temperature difference that little temperature difference large discharge type unit allows is about 5 DEG C, and maximum user's temperature difference that the flow type unit that has a narrow range of temperature greatly allows is about 10 DEG C.
Adopt the mode of multistage surface-type heat exchanger process air in air processing machine, according to the direction of air intlet, be defined as first-surface formula heat exchanger, by that analogy.
Surface-type heat exchanger in air processing machine can be various types of wall-type heat exchange equipment, and the type of fluid as cold-producing medium side can be the cold water, various fluorochlorohydrocarbon class (freon) refrigeration working medium etc. of different water temperature; The operating mode of the surface-type heat exchanger in air processing machine can be divided into dry and cold operating mode and clammy operating mode two kinds.When inflow temperature is higher than unit air intake dew-point temperature, surface-type heat exchanger is that dry cooling condition runs, and only reduces air intake dry-bulb temperature, does not dehumidify to air intake; When inflow temperature is lower than unit air intake dew-point temperature or when using freon direct expansion sweat cooling, surface-type heat exchanger is that wet cooling condition runs, and not only reduces air intake dry-bulb temperature, also reduces the water capacity of air intake, dehumidify to air intake itself; According to the difference of meteorological condition, direct sweat cooling section can be installed additional at the outlet air end of air processing machine; Air processing machine can concentrated setting, also dispersibles setting.Can be arranged in building, also can be arranged on outside building.
The handpiece Water Chilling Units of conventional refrigeration mode can be freon class steam compression type refrigerating mode, the one of lithium bromide absorbing type refrigeration mode and complex method thereof.
The refrigerating medium of tradition cooling-water machine output in summer is cold water.Conventional high-temperature handpiece Water Chilling Units, generally exports the high temperature cold water of about 16 ~ 18 DEG C; Conventional cryogenic handpiece Water Chilling Units, supply water temperature is generally the low-temperature cold water of about 7 DEG C.Indoor end can be fan coil, various types of radiation coil pipe etc.;
Different according to the water temperature entered in indoor end, the operating mode of indoor end can be divided into dry and cold operating mode and clammy operating mode two kinds, judge according to as indoor end inflow temperature, when inflow temperature is higher than room air dew-point temperature, indoor end is that dry cooling condition runs, and only bears the task of eliminating indoor section or complete sensible heat; When inflow temperature is lower than room air dew-point temperature, indoor end is that wet cooling condition runs, and bears the task of eliminating part or all of indoor sensible heat and latent heat (humidity load).
Heat exchanger is typical wall-type heat exchange equipment, multiplex plate type heat exchanger in engineering, by the exchange heat of cold fluid and hot fluid, and the water temperature needed for acquisition.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described,
Fig. 1 is the structural representation of the embodiment of the present invention 1;
Fig. 2 is the structural representation of the embodiment of the present invention 2.
Fig. 3 is the structural representation of the embodiment of the present invention 3.
Detailed description of the invention
A kind of indirect evaporation cooling water chiller and mechanical refrigeration handpiece Water Chilling Units air conditioning air-conditioning system, embodiment 1 as shown in Figure 1, in air processing machine 1 casing with air inlet and air outlet, first-surface formula heat exchanger 2 is installed successively from air inlet to air outlet, secondary surface formula heat exchanger 3 and pressure fan 4, the outlet pipe of indirect evaporation water chiller 6 is connected to the water inlet of the first-surface formula heat exchanger 2 of air processing machine 1, the outlet pipe of first-surface formula heat exchanger 2 is connected to the cooling water intake of Conventional cryogenic cooling-water machine 8, the cooling water outlet of Conventional cryogenic cooling-water machine 8 is connected to the water inlet of indirect evaporation water chiller 6, the delivery port of the chilled water of Conventional cryogenic handpiece Water Chilling Units 8 is connected to the water inlet of secondary surface formula heat exchanger 3, the outlet pipe of secondary surface formula heat exchanger 3 is connected to indoor end 7 water inlet being positioned at air-conditioned room 5, the outlet pipe of indoor end 7 is connected to the chilled water water inlet of Conventional cryogenic cooling-water machine 8, the exhaust outlet of pressure fan 4 leads to air-conditioned room 5 by the ajutage that air processing machine 1 air outlet is installed.The high temperature cold water that indirect evaporation water chiller 6 is produced first is sent in the first-surface formula heat exchanger 2 of air processing machine 1 by aqueduct, be transported to by aqueduct the heat taking away condenser in Conventional cryogenic handpiece Water Chilling Units 8 as its cooling water again to after the wet cooling process such as the air intake of air processing machine 1 carries out, finally get back in indirect evaporation water chiller 6 and form a water circulation.For another one water circulation, the low-temperature cold water that Conventional cryogenic handpiece Water Chilling Units 8 exports first is sent in the secondary surface formula heat exchanger 3 of air processing machine 1 by aqueduct, after being carried out dehumidification cooling process by the air that first-surface formula heat exchanger 2 processed, high temperature cold water after intensification is transported in indoor end 7 by aqueduct carries out cooling process to room air, finally gets back to the evaporimeter in Conventional cryogenic handpiece Water Chilling Units 8.The air intake of air processing machine 1, first by being processed by secondary surface formula heat exchanger 3 dehumidification cooling after the wet cooling process of the grade of first-surface formula heat exchanger 2, sends into air-conditioned room 5 by pressure fan 4 and air supply duct again.Within the system, owing to sending into the dew-point temperature of cold water temperature higher than indoor design condition point of indoor end 7, indoor end 7 is that dry cooling condition runs, and the load that indirect evaporation water chiller 6 is born is the cooling water of pre-cooling of fresh air and Conventional cryogenic handpiece Water Chilling Units 8.
Embodiment 2 as shown in Figure 2, the chilled water delivery port of Conventional cryogenic cooling-water machine 8 is connected to the second water inlet of water-water heat exchanger 9, second outlet pipe of water-water heat exchanger 9 is connected to the chilled water water inlet of Conventional cryogenic cooling-water machine 8, first outlet pipe of water-water heat exchanger 9 is connected to the first water inlet of secondary surface formula heat exchanger 3, the outlet pipe of secondary surface formula heat exchanger 3 is connected to the water inlet of indoor end 7, and the outlet pipe of indoor end 7 is connected to the first water inlet of water-water heat exchanger 9.The high temperature cold water that indirect evaporation water chiller 6 is produced is sent into by aqueduct in the first-surface formula heat exchanger 2 of air processing machine 1, after the wet cooling process such as the air intake of air processing machine 1 carries out, the heat taking away condenser in Conventional cryogenic handpiece Water Chilling Units 8 as its cooling water is transported to again by aqueduct, finally get back in indirect evaporation water chiller 6 and form a water circulation, for another one water circulation, the backwater of indoor end 7 is in water-water heat exchanger 9 and after the cold water generation heat exchange cooling of Conventional cryogenic handpiece Water Chilling Units 8 output ground, the secondary surface formula heat exchanger 3 of air processing machine 1 is delivered to by aqueduct, send in indoor end 7 again after being carried out dehumidification cooling process by the air that first-surface formula heat exchanger 2 processed, finally get back in water-water heat exchanger 9 and form water circulation.The air intake of air processing machine 1 first by after the wet cooling process of the grade of first-surface formula heat exchanger 2, then by secondary surface formula heat exchanger 3 dehumidification cooling process, sends into air-conditioned room 5 by pressure fan 4 and air supply duct.Within the system, air processing machine 1 has carried out dehumidification cooling process to new wind, owing to sending into the dew-point temperature of cold water temperature higher than indoor design condition point of indoor end 7, indoor end 7 is that dry cooling condition runs, and the load that indirect evaporation water chiller 6 is born is the cooling water of pre-cooling of fresh air and Conventional cryogenic handpiece Water Chilling Units 8.
Embodiment 3 as shown in Figure 3, arranges directly sweat cooling section 10 between secondary surface formula heat exchanger 3 and pressure fan 4.According to the change of indoor-outdoor air parameter, the refrigerating function section of unit can be selected flexibly, realize energy saving and regulate requirement.
Claims (3)
1. an indirect evaporation cooling water chiller and mechanical refrigeration handpiece Water Chilling Units air conditioning air-conditioning system, it is characterized in that: in air processing machine (1) casing with air inlet and air outlet, first-surface formula heat exchanger (2) is installed successively from air inlet to air outlet, secondary surface formula heat exchanger (3) and pressure fan (4), the outlet pipe of indirect evaporation water chiller (6) is connected to the water inlet of the first-surface formula heat exchanger (2) of air processing machine (1), the outlet pipe of first-surface formula heat exchanger (2) is connected to the cooling water intake of Conventional cryogenic cooling-water machine (8), the cooling water outlet of Conventional cryogenic cooling-water machine (8) is connected to the water inlet of indirect evaporation water chiller (6), the delivery port of the chilled water of Conventional cryogenic cooling-water machine (8) is connected to the water inlet of secondary surface formula heat exchanger (3), the outlet pipe of secondary surface formula heat exchanger (3) is connected to indoor end (7) water inlet being positioned at air-conditioned room (5), the outlet pipe of indoor end (7) is connected to the chilled water water inlet of Conventional cryogenic cooling-water machine (8), the exhaust outlet of pressure fan (4) leads to air-conditioned room (5) by the ajutage that air processing machine (1) air outlet is installed.
2. indirect evaporation cooling water chiller according to claim 1 and mechanical refrigeration handpiece Water Chilling Units air conditioning air-conditioning system, it is characterized in that: the chilled water delivery port of Conventional cryogenic cooling-water machine (8) is connected to the second water inlet of water-water heat exchanger (9), second outlet pipe of water-water heat exchanger (9) is connected to the chilled water water inlet of Conventional cryogenic cooling-water machine (8), first outlet pipe of water-water heat exchanger (9) is connected to the water inlet of secondary surface formula heat exchanger (3), the outlet pipe of secondary surface formula heat exchanger (3) is connected to the water inlet of indoor end (7), the outlet pipe of indoor end (7) is connected to the first water inlet of water-water heat exchanger (9).
3. indirect evaporation cooling water chiller according to claim 1 and mechanical refrigeration handpiece Water Chilling Units air conditioning air-conditioning system, arranges directly sweat cooling section (10) between secondary surface formula heat exchanger (3) and pressure fan (4).
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| CN102914179A (en) * | 2012-10-25 | 2013-02-06 | 新特能源股份有限公司 | Method and device for producing 7-DEG C water by air cooling |
| CN103512116B (en) * | 2013-10-25 | 2017-01-04 | 宋波 | A kind of family formula radiation tail end air conditioning system and control system |
| CN104329729B (en) * | 2014-10-24 | 2017-09-19 | 世源科技工程有限公司 | One kind is freely cooled down and heating system |
| CN106440149A (en) * | 2016-12-05 | 2017-02-22 | 祝大顺 | Closed indirect evaporative cooling and mechanical refrigerating combined operation water chilling unit |
| CN107764122B (en) * | 2017-11-20 | 2023-09-22 | 济南热力集团有限公司 | Large-temperature-difference cold water combined type cascade utilization system based on waste heat utilization |
| CN116321916A (en) * | 2021-12-21 | 2023-06-23 | 华为数字能源技术有限公司 | Cooling system, cabinet and data center |
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