CN102022788A - Combined cooling air-conditioning system of indirect evaporation chiller and mechanical refrigeration chiller - Google Patents
Combined cooling air-conditioning system of indirect evaporation chiller and mechanical refrigeration chiller Download PDFInfo
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- CN102022788A CN102022788A CN2010105770052A CN201010577005A CN102022788A CN 102022788 A CN102022788 A CN 102022788A CN 2010105770052 A CN2010105770052 A CN 2010105770052A CN 201010577005 A CN201010577005 A CN 201010577005A CN 102022788 A CN102022788 A CN 102022788A
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Abstract
The invention discloses a combined cooling air-conditioning system of an indirect evaporation chiller and a mechanical refrigeration chiller. A first-stage and a second-stage surface heat exchangers and a blower are arranged in order in a casing of an air processor from an air inlet to an air outlet, a water outlet pipe of the indirect evaporation chiller is connected to a water inlet of the first-stage surface heat exchanger of the air processor, a water outlet pipe of the first-stage surface heat exchanger is connected with a cooling water inlet of a traditional low-temperature chiller, a cooling water outlet of the traditional low-temperature chiller is connected with a water inlet of the indirect evaporation chiller, a chilled water outlet of the traditional low-temperature chiller is connected to a water inlet of the second-stage surface heat exchanger, a water outlet pipe of the second-stage surface heat exchanger is connected to an indoor tail-end water inlet located in an air-conditioning room, a water outlet pipe at the tail end in the air-conditioning room is connected with a chilled water inlet of the traditional low-temperature chiller, and an exhaust outlet of the blower leads to the air-conditioning room through a blast pipe. The combined air conditioning system not only can be used in dry heat regions but also can be used in moist heat regions, makes the best of refrigeration capacity of dry air energy, realizes the cascade utilization of energy, reduces the installed capacity and electric power load of equipment, improves the fresh air amount of the air-conditioning system, and improves the indoor air quality.
Description
Technical field
The present invention relates to the HVAC technical field, be applicable to the application in all kinds of buildings of middle humidity and high humility area, particularly a kind of indirect evaporation cooling water chiller and mechanical refrigeration handpiece Water Chilling Units associating cooling air-conditioning system.
Background technology
In traditional air-conditioning system, freon vapour compression refrigeration system electrification is as the drive energy of refrigeration, lithium bromide absorbing type refrigeration then uses combustion gas or steam as the drive energy that freezes, because the intrinsic characteristics of its refrigeration modes, the discharging that has produced the excessive utilization such as atmospheric ozone damage layer, the energy and resource, a large amount of greenhouse gases causes the greenhouse effects aggravation, and Cure of Sick Building Syndrome (Sick Building Syndrome, SBS) many adverse effects of indoor and outdoor surroundings such as destruction such as grade.
China's energy for building has surpassed 1/4 of national total energy consumption at present, and will progressively be increased to more than 1/3 along with the raising of living standards of the people, and in energy for building, the energy consumption of HVAC has accounted for about 27.4% again, therefore it is energy-conservation to vigorously advocate HVAC, for construction resource-conserving, environmentally friendly low-carbon type society crucial effects is arranged.
Usually for comfort air conditioning system, the adjusting of indoor temperature and humidity is the major function of air-conditioning, and the effect of summer air-conditioning is that air is lowered the temperature and dehumidification treatments, and wherein the energy consumption duty of dehumidifying is transferred about 30% ~ 50% of total energy consumption.
In air-conditioning system, the dry-bulb temperature that the temperature of the cooling processing requirements low-temperature receiver of air is lower than space air gets final product, and then requires the temperature of low-temperature receiver to be lower than the dew-point temperature of room air to the dehumidifying of air.Traditional air-conditioning system uses same low-temperature receiver air is lowered the temperature and to dehumidify, and is referred to as the wet Combined Treatment mode of heat.
Supposing to require summer indoor temperature is 25 ℃, and relative humidity is 60%, and this moment, corresponding dew-point temperature was 16.7 ℃.The task of anthropogenic heat is the sensible heat amount of discharging from 25 ℃ air, considers 10 ℃ heat transfer temperature difference, and corresponding sink temperature only needs 15 ℃ and gets final product; The task of air conditioner dehumidification is to discharge moisture under 16.7 ℃ dew-point temperature, considers 10 ℃ heat transfer temperature difference, and then the temperature of low-temperature receiver is about 7 ℃.
Reality is the central air-conditioning system of China wet cooling condition fan coil+fresh air conditioner systems that adopt based on traditional handpiece Water Chilling Units more, the water at low temperature that the handpiece Water Chilling Units unification is produced about 7 ℃ is handled simultaneously to indoor air temperature and humidity, the eliminating amount of sensible heat is generally about 50% of total amount of heat in the air-conditioning system, this part originally can adopt heat that the high temperature low-temperature receiver promptly can drain also with the shared 7 ℃ low temperature cold source of dehumidifying, the waste that has therefore just caused energy to utilize.
Meanwhile, central air-conditioning system is according to the 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, help improving indoor air quality, but problem is in the traditional air-conditioning system, why can not use new wind in a large number? as mentioned above, 7 ℃ of chilled waters that the handpiece Water Chilling Units unification is produced, it is necessary being used for indoor air dehumidification (corresponding dew-point temperature is 16.7 ℃), but then there is the waste of energy utilization for sensible heat amount in the decontamination chamber (corresponding air themperature is 25 ℃), if go to handle more than the high outdoor new wind of indoor air temperature with 7 ℃ chilled water again, then cause the huge waste of energy once more, and along with its quantity of increase of resh air requirement sharply rises, therefore, handle new wind with same low-temperature receiver, with respect to return air in the process chamber, more unreasonable in the energy utilization, and energy consumption is bigger, even under 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 required cold of summer air-conditioning, and promptly when the water source exists, dry air is referred to as the dry air energy owing to the ability that is in the external acting that undersaturated condition exists.
Dry air can sweat cooling technology utilize dry air can obtain the required refrigerating capacity of air-conditioning exactly, in dissimilar evaporation-refrigeration devices, utilize the wet exchange of heat 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 has obtained good effect because the advantage of its green, health, energy-saving and environmental protection, economic dispatch uniqueness has obtained using widely in xeothermic area especially Xinjiang region.But humidity and high humility area in the inland, because outdoor air water capacity height, relative humidity is higher, use dry air energy sweat cooling technology separately, because temperature drop is limited, can not be difficult to solve the task of air-conditioning system heat extraction and hydrofuge to fresh air dehumidification, therefore not obtain enough attention of people and application for a long time.
Summary of the invention
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 associating cooling air-conditioning system, the associating cooling mode that has adopted dry air sweat cooling technology and Background Conventional chiller units to combine, expand the zone that the sweat cooling air-conditioning is suitable for, not only use in xeothermic area, and can be applied at damp-heat area, make full use of the refrigerating capacity of dry air energy, realize the cascade utilization of energy, can reduce the installed capacity of equipment, 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 associating cooling air-conditioning system, it is characterized in that: in having the air processing machine casing of air inlet and air outlet, the one-level surface-type heat exchanger is installed from the air inlet to the air outlet successively, secondary surface formula heat exchanger and pressure fan, the outlet pipe of indirect evaporation cooling-water machine is connecting the water inlet of the one-level surface-type heat exchanger of air processing machine, the outlet pipe of one-level surface-type heat exchanger is connecting the cooling water intake of traditional low-temperature cold water machine, the cooling water outlet of tradition low-temperature cold water machine is connecting the water inlet of indirect evaporation cooling-water machine, the delivery port of the chilled water of tradition low-temperature cold water machine is connecting the water inlet of secondary surface formula heat exchanger, the outlet pipe of secondary surface formula heat exchanger is connecting the indoor terminal water inlet that is positioned at air-conditioned room, the outlet pipe of indoor end is connecting the chilled water water inlet of traditional low-temperature cold water machine, and the exhaust outlet of pressure fan leads to air-conditioned room by the ajutage of installing on the air processing machine air outlet.
Air-conditioning system solution of the present invention can be according to different meteorological areas, perhaps in the area of determining, in different time sections under the different meteorological condition, the principle of utilizing based on energy cascade optimization, in the utilization of energy more rationally, fully; Adopt different low-temperature receivers that outdoor air and room air are handled, especially, because the associating cooling mode that components of system as directed has adopted energy-conservation dry air sweat cooling technology and tradition refrigeration to combine, realized the air conditioning processing scheme of optimizing in middle humidity and high humility area, carry out air conditioning to indoor, and realized the energy saving adjusting in running.
Can realize the energy saving adjusting easily, increase the form that system in combination is used, be easy to and build cooperation, can effectively reduce the installed capacity of equipment, the power load of minimizing equipment takies the interior architecture area less, has correspondingly improved the utilization rate of space.Owing in system, adopted energy-saving and environmental protection, green, the healthy dry air can the sweat cooling technology, the efficient that energy utilizes is higher, in the application of the energy, realize " classification utilization, optimization coupling ", the refrigerating capacity of maximum using dry air energy, the cascade utilization of realization energy.The Energy Efficiency Ratio of system is better than traditional air-conditioning system, and the present invention is based on the high-quality air-conditioning system solution of energy-conserving product technology; On the other hand, because this air-conditioning system in running, can be divided season, carry out the energy saving adjusting at times according to outdoor weather condition, the air-conditioning solution is more reasonable, further improves the energy saving of system.
The present invention has expanded the zone that the sweat cooling air-conditioning is suitable for, and not only uses in xeothermic area, more can well be used at damp-heat area.The refrigerating capacity of maximum using dry air energy, the cascade utilization of realization energy.In energy-conservation, can make that the resh air requirement of air-conditioning system is farthest improved, effectively improve indoor air quality.
The associating cooling mode that the present invention has adopted dry air energy sweat cooling technology and tradition refrigeration to combine, widened the zone that the sweat cooling air-conditioning uses, not only use in xeothermic area, and realized application in warm area, make full use of dry air can refrigerating capacity, realized the cascade utilization of energy, reduced the installed capacity of equipment, reduce the power load of equipment, improved the resh air requirement of air-conditioning system, effectively improved indoor air quality.
The indirect evaporation cooling-water machine is meant the handpiece Water Chilling Units of utilizing dry air to freeze, as described in the method for patent 1, a kind of 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.Year cold medium of indirect evaporation cooling-water machine output is a high temperature cold water, and the scope of leaving water temperature is between local outdoor air dew point and the wet-bulb temperature.The indirect evaporation cooling-water machine is divided into have a narrow range of temperature greatly flow type and the big flow type two big series of the little temperature difference, and maximum user's temperature difference that the big flow type of little temperature difference unit allows is about 5 ℃, and maximum user's temperature difference that the flow type unit that has a narrow range of temperature greatly allows is about 10 ℃.
Adopt multistage surface-type heat exchanger to handle the mode of air in the air processing machine,, be defined as the one-level surface-type heat exchanger, by that analogy according to the direction of air intlet.
Surface-type heat exchanger in the air processing machine can be various types of wall-type heat exchange equipment, can be cold water, various fluorochlorohydrocarbon class (freon) refrigeration working medium of different water temperatures etc. as the type of fluid of cold-producing medium one side; The operating mode of the surface-type heat exchanger in the air processing machine can be divided into two kinds of dry and cold operating mode and clammy operating modes.When inflow temperature was higher than unit air intake dew-point temperature, surface-type heat exchanger was the dry cooling condition operation, only reduces air intake dry-bulb temperature, air intake is not dehumidified; When inflow temperature was lower than unit air intake dew-point temperature or use freon direct expansion sweat cooling, surface-type heat exchanger was the wet cooling condition operation, not only reduces air intake dry-bulb temperature, also reduces the water capacity of air intake, and air intake itself is dehumidified; According to the difference of meteorological condition, can install direct sweat cooling section additional at the outlet air end of air processing machine; Air processing machine can be concentrated setting, also can disperse to be provided with.Can be arranged in the building, also can be arranged on outside the building.
The handpiece Water Chilling Units of tradition refrigeration modes can be a kind of and complex method of freon class steam compression type refrigerating mode, lithium bromide absorbing type refrigeration mode.
Year cold medium of tradition cooling-water machine output in summer is a cold water.The conventional high-temperature handpiece Water Chilling Units is generally exported the high temperature cold water about 16 ~ 18 ℃; Tradition low-temperature cold water unit, supply water temperature is generally the low-temperature cold water about 7 ℃.Indoor end can be fan coil, various types of radiation coil pipe etc.;
According to the water temperature difference in the end in the inlet chamber, the operating mode of indoor end can be divided into two kinds of dry and cold operating mode and clammy operating modes, the foundation of judging is indoor terminal inflow temperature, when inflow temperature is higher than the room air dew-point temperature, indoor end is the dry cooling condition operation, only bears the task of eliminating indoor section or complete sensible heat; When inflow temperature is lower than the room air dew-point temperature, indoor end is the wet cooling condition operation, 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, and Multipurpose templet formula heat exchanger on the engineering by the exchange heat of cold fluid and hot fluid, obtains required water temperature.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing,
Fig. 1 is the structural representation of the embodiment of the invention 1;
Fig. 2 is the structural representation of the embodiment of the invention 2.
Fig. 3 is the structural representation of the embodiment of the invention 3.
The specific embodiment
A kind of indirect evaporation cooling water chiller and mechanical refrigeration handpiece Water Chilling Units associating cooling air-conditioning system, embodiment 1 as shown in Figure 1, in air processing machine 1 casing with air inlet and air outlet, one-level surface-type heat exchanger 2 is installed from the air inlet to the air outlet successively, secondary surface formula heat exchanger 3 and pressure fan 4, the outlet pipe of indirect evaporation cooling-water machine 6 is connecting the water inlet of the one-level surface-type heat exchanger 2 of air processing machine 1, the outlet pipe of one-level surface-type heat exchanger 2 is connecting the cooling water intake of traditional low-temperature cold water machine 8, the cooling water outlet of tradition low-temperature cold water machine 8 is connecting the water inlet of indirect evaporation cooling-water machine 6, the delivery port of the chilled water of tradition low-temperature cold water unit 8 is connecting the water inlet of secondary surface formula heat exchanger 3, the outlet pipe of secondary surface formula heat exchanger 3 is connecting indoor terminal 7 water inlets that are positioned at air-conditioned room 5, indoor terminal 7 outlet pipe is connecting the chilled water water inlet of traditional low-temperature cold water machine 8, and the exhaust outlet of pressure fan 4 leads to air-conditioned room 5 by the ajutage of installing on air processing machine 1 air outlet.The high temperature cold water that indirect evaporation cooling-water machine 6 is produced is sent in the one-level surface-type heat exchanger 2 of air processing machine 1 earlier by aqueduct, be transported to the heat of taking away condenser in traditional low-temperature cold water unit 8 as its cooling water by aqueduct again after wet coolings such as the air intake of air processing machine 1 carries out are handled, get back at last and form a water circulation in the indirect evaporation cooling-water machine 6.Circulate for another one water, the low-temperature cold water of tradition low-temperature cold water unit 8 outputs is sent in the secondary surface formula heat exchanger 3 of air processing machine 1 by aqueduct earlier, after the air of being handled by one-level surface-type heat exchanger 2 carried out dehumidification cooling and handle, high temperature cold water after the intensification is transported in indoor terminal 7 the room air processing of lowering the temperature by aqueduct, gets back to the evaporimeter in traditional low-temperature cold water unit 8 at last.The air intake of air processing machine 1 is handled by secondary surface formula heat exchanger 3 dehumidifications cooling after handling by the wet cooling of the grade of one-level surface-type heat exchanger 2 earlier again, sends into air-conditioned room 5 by pressure fan 4 and air supply duct.In this system, owing to send into the dew-point temperature that indoor terminal 7 cold water temperature is higher than indoor design condition point, indoor terminal 7 is dry cooling condition operations, and the load that indirect evaporation cooling-water machine 6 is born is the cooling water of the pre-cold-peace tradition of new wind low-temperature cold water unit 8.
Claims (3)
1. indirect evaporation cooling water chiller and mechanical refrigeration handpiece Water Chilling Units associating cooling air-conditioning system, it is characterized in that: in the air processing machine with air inlet and air outlet (1) casing, one-level surface-type heat exchanger (2) is installed from the air inlet to the air outlet successively, secondary surface formula heat exchanger (3) and pressure fan (4), the outlet pipe of indirect evaporation cooling-water machine (6) is connecting the water inlet of the one-level surface-type heat exchanger (2) of air processing machine (1), the outlet pipe of one-level surface-type heat exchanger (2) is connecting the cooling water intake of traditional low-temperature cold water machine (8), the cooling water outlet of tradition low-temperature cold water machine (8) is connecting the water inlet of indirect evaporation cooling-water machine (6), the delivery port of the chilled water of tradition low-temperature cold water machine (8) is connecting the water inlet of secondary surface formula heat exchanger (3), the outlet pipe of secondary surface formula heat exchanger (3) is connecting indoor end (7) water inlet that is positioned at air-conditioned room (5), the outlet pipe of indoor end (7) is connecting the chilled water water inlet of traditional low-temperature cold water machine (8), and the exhaust outlet of pressure fan (4) leads to air-conditioned room (5) by the ajutage of installing on air processing machine (1) air outlet.
2. indirect evaporation cooling water chiller according to claim 1 and mechanical refrigeration handpiece Water Chilling Units associating cooling air-conditioning system, it is characterized in that: the chilled water delivery port of traditional low-temperature cold water machine (8) is connecting second water inlet of water-water heat exchanger (9), second outlet pipe of water-water heat exchanger (9) is connecting the chilled water water inlet of traditional low-temperature cold water machine (8), first outlet pipe of water-water heat exchanger (9) is connecting the water inlet of secondary surface formula heat exchanger (3), the outlet pipe of secondary surface formula heat exchanger (3) is connecting the water inlet of indoor end (7), and the outlet pipe of indoor end (7) is connecting 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 associating cooling air-conditioning system are being provided with directly sweat cooling section (10) between secondary surface formula heat exchanger (3) and pressure fan (4).
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| CN201010577005.2A CN102022788B (en) | 2010-12-05 | 2010-12-05 | Indirect evaporation cooling water chiller and mechanical refrigeration handpiece Water Chilling Units air conditioning air-conditioning system |
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Cited By (6)
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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 |
| CN103512116A (en) * | 2013-10-25 | 2014-01-15 | 宋波 | House type radiation tail end air conditioner system and control system |
| CN104329729A (en) * | 2014-10-24 | 2015-02-04 | 世源科技工程有限公司 | Free cooling 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 |
| CN107764122A (en) * | 2017-11-20 | 2018-03-06 | 济南热力集团有限公司 | A kind of big temperature difference cold water combined type gradient utilization system based on UTILIZATION OF VESIDUAL HEAT IN |
| WO2023116171A1 (en) * | 2021-12-21 | 2023-06-29 | 华为数字能源技术有限公司 | Cooling system, cabinet and data center |
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| CN104329729A (en) * | 2014-10-24 | 2015-02-04 | 世源科技工程有限公司 | Free cooling 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 |
| CN107764122A (en) * | 2017-11-20 | 2018-03-06 | 济南热力集团有限公司 | A kind of big temperature difference cold water combined type gradient utilization system based on UTILIZATION OF VESIDUAL HEAT IN |
| 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 |
| WO2023116171A1 (en) * | 2021-12-21 | 2023-06-29 | 华为数字能源技术有限公司 | Cooling system, cabinet and data center |
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| CN102022788B (en) | 2015-08-26 |
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