CN112856646A - Two-stage water collecting and distributing device air conditioning system with four-pipe energy hoist and water chilling unit coupled and using method thereof - Google Patents
Two-stage water collecting and distributing device air conditioning system with four-pipe energy hoist and water chilling unit coupled and using method thereof Download PDFInfo
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- CN112856646A CN112856646A CN202110319520.9A CN202110319520A CN112856646A CN 112856646 A CN112856646 A CN 112856646A CN 202110319520 A CN202110319520 A CN 202110319520A CN 112856646 A CN112856646 A CN 112856646A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
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Abstract
The invention relates to a two-stage water collecting and distributing device air conditioning system with four-pipe energy elevators and water chilling units coupled. The air conditioning system flow constructed by the traditional water chilling unit and heat pump unit is improved, a four-pipe energy hoister is used for replacing a common heat pump unit, and meanwhile, a two-stage water collecting and distributing device air conditioning system with the four-pipe energy hoister and the water chilling unit coupled is constructed in a mode of arranging 3 sets of air conditioning cold and hot water collecting and distributing devices and switching valves. The invention overcomes the defects of an air conditioning system constructed by a traditional water chilling unit and a boiler and an air conditioning system constructed by the water chilling unit and a heat pump unit, provides an economic, healthy, comfortable, green, environment-friendly and energy-saving system, is suitable for large public buildings in hot summer and warm winter areas, and is particularly suitable for large hospital projects.
Description
Technical Field
The invention relates to an air conditioning system, in particular to a two-stage water collecting and distributing device air conditioning system with four-pipe energy elevators and a water chilling unit coupled and a using method thereof.
Background
In large public buildings in hot summer and warm winter areas, the annual load characteristics are that the cold load is large in summer, the outdoor temperature is relatively high in winter, and the heat load is relatively small; because of large building scale and large depth, the inner and outer zones of the air conditioner are very obvious, the outer zone of the air conditioning system has cold load in summer and heat load in winter, and the inner zone has cold load all the year round. Such buildings require air conditioning systems to provide cooling in summer and to provide cooling and heating to the inner and outer zones, respectively, in winter.
In the large hospital project in the public building, the air conditioning system of the building is required to simultaneously supply cold and heat all the year round because of the reheating requirement after deep cooling and dehumidification of air in the clean area such as the operation department in summer.
The traditional common cold water unit and boiler are used as air conditioning systems of cold and heat sources, or a set of four-pipe energy hoister adopted as the air conditioning system of the cold and heat sources is independently arranged for a clean area to meet the requirement. The air conditioning system constructed by the air conditioning system can meet the requirement of simultaneous cooling and heating all year round, but has the disadvantages of large initial investment, high operating cost, large occupied machine room area and possibility of safety accidents of a boiler room; the air conditioning system constructed by the latter can meet the requirement of simultaneous cooling and heating all year round, but the four-pipe energy elevator has the advantages that the cooling energy efficiency ratio in summer is far lower than that of a water chilling unit, the running cost all year round is high, and a set of air conditioning system is additionally arranged for a clean area independently of the air conditioning system of the building, so that not only is the initial investment large, but also the pipeline of the air conditioning water system of the whole building becomes complicated.
The invention patent ZL201510631865.2 discloses a double-water-collecting-and-distributing-device four-pipe air conditioning system with a heat pump unit coupled with a water chilling unit and a using method thereof, which solves the technical problem of respectively supplying cold and heat for an inner area and an outer area of a building in winter, but still has the following problems: 1. the requirement that air conditioning systems of large hospital projects (including clean areas such as operating departments) need to supply cold and heat simultaneously all the year round cannot be met; 2. in winter, a water chilling unit is used for cooling, a heat pump unit is used for heating, two sets of equipment need to run simultaneously, the water chilling unit is large in size, a trolley is pulled, energy consumption is still high, pipelines are relatively complex, and professional personnel are needed to perform valve switching operation.
The invention with the patent application number of CN202011024494.9 discloses a double water collecting and distributing device air conditioning system with a four-pipe energy hoisting machine and a water chilling unit coupled and a using method thereof, which can realize cooling in summer and respectively supply cooling and heat for an inner area and an outer area of a building in winter, but still has the following problems: the reheating quantity required after deep cooling and dehumidification of air in a clean area can not be provided in summer, the requirement that air conditioning systems of large hospital projects (including clean areas such as operating departments) need to simultaneously supply cold and heat all the year round can not be met, and the clean area needs to be additionally and separately provided with one set of air conditioning system, so that not only the initial investment is large, but also the pipeline of the whole air conditioning water system of a building can be complicated.
Disclosure of Invention
The invention aims to overcome the defects of an air conditioning system constructed by a traditional water chilling unit and a boiler, an air conditioning system constructed by the invention patent ZL201510631865.2 and the invention with the patent application number of CN202011024494.9, and provides an economical, healthy, comfortable, green, environment-friendly and energy-saving two-stage water collecting and distributing device air conditioning system which is suitable for large public buildings in hot summer and warm winter areas, in particular large hospital projects (including clean areas such as operating departments) and is coupled with the water chilling unit, and a using method thereof.
The technical scheme adopted by the invention is as follows: the air conditioning system flow constructed by the traditional water chilling unit and heat pump unit is improved, a four-pipe energy hoister is used for replacing a common heat pump unit, and meanwhile, a two-stage water collecting and distributing device air conditioning system with the four-pipe energy hoister and the water chilling unit coupled is constructed in a mode of arranging 3 sets of air conditioning cold and hot water collecting and distributing devices and switching valves.
The system comprises a water chilling unit 1, a four-pipe energy hoist 2, an outdoor side heat exchange system 3, a first air conditioner cold water circulating pump 4, a second air conditioner cold water circulating pump 5, a first-stage cold water collector 6, a first-stage cold water separator 7, an air conditioner cold water system constant pressure device 8, an air conditioner hot water circulating pump 9, a first-stage hot water collector 10, a first-stage hot water separator 11, an air conditioner hot water system constant pressure device 12, a second-stage cold/hot water collector 13, a second-stage cold/hot water separator 14, a switching valve and a pressure difference bypass valve group;
a water supply pipe of a first evaporator 21 of the water chilling unit 1 and a cold water supply pipe of a cold water side 23 of the four-pipe energy elevator 2 are connected into a first-stage cold water separator 7; meanwhile, the first-stage cold water separator 7 is connected with two cold water supply branch pipes, one branch is connected with a cold water supply pipe at the tail end of an air conditioner of a year-round cold supply loop, and the other branch is connected with a second-stage cold/hot water separator 14;
two cold water return branch pipes are connected to a primary cold water collector 6, one is a cold water return pipe at the tail end of an air conditioner of a year-round cooling loop, and the other is a return pipe connected from a secondary cold/hot water collector 13;
two paths of cold water return pipes are connected from the primary cold water collector 6, and one path of cold water return pipes is pressurized and flows back to the first evaporator 21 of the water chilling unit 1 through the first air-conditioning cold water circulating pump 4 and becomes air-conditioning cold water after heat exchange; one path is pressurized by a second air conditioner cold water circulating pump 5, flows back to a cold water side 23 of the four-pipe energy hoist 2 and becomes air conditioner cold water after heat exchange;
a bypass pipe is arranged between the cold water collector 6 and the cold water separator 7, and a differential pressure bypass valve group is arranged on the bypass pipe; the cold water collector 6 is connected with a constant pressure device 8 of an air conditioner cold water system;
a hot water supply pipe at the hot water side 24 of the four-pipe energy hoister 2 is connected to the first-stage hot water separator 11; meanwhile, the first-stage hot water separator 11 is connected with two hot water supply branch pipes, one is connected with a hot water supply pipe at the tail end of an air conditioner of a annual heat supply loop, and the other is connected with a second-stage cold/hot water separator 14;
two hot water return branch pipes are connected into a first-stage hot water collector 10, one is a hot water return pipe at the tail end of an air conditioner of a annual heat supply loop, and the other is a return pipe connected out of a second-stage cold/hot water collector 13;
a branch pipe connected from the first-stage hot water collector 10 is pressurized by an air-conditioning hot water circulating pump 9, flows back to a hot water side 24 of the four-pipe energy-producing elevator 2 and is subjected to heat exchange to form water supply for air-conditioning hot water;
a bypass pipe is arranged between the first-stage hot water collector 10 and the first-stage hot water separator 11, and a differential pressure bypass valve group is arranged on the bypass pipe; the primary hot water collector 10 is connected with a constant pressure device 12 of an air-conditioning hot water system;
the second-stage cold/hot water collector 13 is connected with a cold/hot water return pipe at the tail end of the air conditioner, and the second-stage cold/hot water separator 14 is connected with a cold/hot water supply pipe at the tail end of the air conditioner;
the first condenser 22 of the water chilling unit 1 is connected with the outdoor heat exchange system 3.
A use method of a two-stage water collecting and distributing device air conditioning system with a four-pipe energy hoist coupled with a water chilling unit comprises the following steps:
the working process of the summer working condition is as follows:
the method comprises the following steps that a water chilling unit 1 supplies cold and a four-pipe energy hoist 2 supplies cold and heat simultaneously, an outdoor side heat exchange system 3 operates, a first air-conditioning cold water circulating pump 4, a second air-conditioning cold water circulating pump 5 operates, an air-conditioning hot water circulating pump 9, an air-conditioning cold water system constant pressure device 8 operates, an air-conditioning hot water system constant pressure device 12, a second valve 32 and a fourth valve 34 in a switching valve are opened, and a first valve 31 and a third valve 33 in the switching valve are closed;
the working process of working conditions in winter and transition seasons is as follows:
the four-pipe energy hoister 2 is preferentially used for supplying cold and heat simultaneously (the water chilling unit 1 is started for supplying cold when cold energy is insufficient), the second air-conditioning cold water circulating pump 5 is operated (the first air-conditioning cold water circulating pump 4 is started for operation when cold energy is insufficient), the air-conditioning hot water circulating pump 9, the air-conditioning cold water system constant pressure device 8 is operated, the air-conditioning hot water circulating pump 9 is operated, the air-conditioning hot water system constant pressure device 12 is operated, the first valve 31 and the third valve 33 in the switching valve are opened, and the second valve 32 and the fourth valve 34 in the switching valve are closed.
The overall design concept of the invention is as follows: the air conditioning system of the traditional water chilling unit and heat pump unit is improved, a four-pipe energy hoister is used for replacing a common air-cooled heat pump unit, and meanwhile, a two-stage water collecting and distributing device air conditioning system which is suitable for large public buildings in hot summer and warm winter areas, particularly large hospital buildings and is formed by coupling the four-pipe energy hoister and the water chilling unit is constructed in a mode of arranging 3 sets of air conditioning cold and hot water collecting and distributing devices and switching valves in two stages. The main machine adopts a combination form of a water chilling unit and a four-pipe energy hoist; according to the cold and hot demands of different regions and seasons of the building, 3 sets of water collecting and distributing devices with two stages are arranged. The primary water collecting and distributing device comprises 2 groups, one group is a cold water collecting and distributing device and a cold water collecting and distributing device, and is used for providing cold water for the area needing cooling all year round, the secondary water collecting and distributing device and the hot water collecting and distributing device; the two-stage water collector and the water collector are 1 group, which is a cold/hot water collector, and cold and hot water is supplied to the region with cold load in summer and hot load in winter by cold and hot switching.
The invention has the following advantages:
1. compared with an air conditioning system constructed by a traditional water chilling unit and a heat pump unit, the water chilling unit is consistent, the traditional heat pump unit is replaced by a four-pipe energy hoisting machine, and meanwhile, a two-stage water distributing and collecting device is constructed to distribute cold water and hot water of an air conditioner. The first stage is a cold water collector, a hot water collector and a hot water collector, which respectively provide cold water for the area needing cold supply all year round, the second stage water collector and the area needing heat supply all year round; the second stage is cold/hot water and water collector, and cold and hot water is supplied to the region with cold load in summer and hot load in winter through cold and hot switching. Therefore, the characteristic that four-pipe energy elevators can simultaneously supply cold and heat all the year around can be fully utilized, the defect that two-pipe air conditioning systems constructed by a traditional water chilling unit and a heat pump unit cannot simultaneously supply cold and heat is overcome, the temperature of each air conditioning area is accurately controlled, and the indoor comfort level is improved.
2. Compared with a four-pipe air conditioning system constructed by a traditional water chilling unit and a boiler, the system has the advantages of less initial investment and smaller occupied machine room area. The heat pump is used for heating, the energy efficiency is higher than that of the boiler, the operation cost is more saved, and the possibility of safety accidents of a boiler room is eliminated.
3. Compared with the patent ZL201510631865.2, the cold and heat supply device can supply cold and heat at the same time all year around, and meets the cold and heat requirements of common unclean areas and clean areas of large hospital projects (including clean areas such as operating departments) which are different all year around; the four-pipe energy hoister is used for supplying cold and heat simultaneously in winter, the comprehensive energy efficiency ratio of the cold supply and the heat supply is high, the running is more energy-saving, and the problems that a cold water unit runs in winter, a trolley is pulled by a large horse, and the energy consumption is still high are solved.
4. Compared with the invention with the patent application number of CN202011024494.9, for large hospital projects (including clean areas such as operating departments), a set of air conditioning system is combined between a common unclean area and a clean area, and a set of air conditioning system adopting a four-pipe energy hoister as a cold and heat source is not required to be additionally arranged for the clean area, so that the manufacturing cost is saved; because the refrigerating energy efficiency ratio of the water chilling unit in summer is far higher than that of a four-pipe energy hoister, the annual energy consumption is low and the operating cost is low.
5. The system replaces the traditional heat pump unit with the four-pipe energy hoister, and meanwhile, two pairs of water collecting and distributing devices and a plurality of switching valves are added, so that a novel economical, healthy, comfortable, green, environment-friendly and energy-saving two-stage water collecting and distributing device air conditioning system with the heat pump unit coupled with a water chilling unit is built.
Drawings
FIG. 1 is a schematic diagram of a four-pipe energy hoist and chiller coupled two-stage water collection and distribution vessel air conditioning system;
FIG. 2 is a schematic diagram of a four-pipe energy hoist and chiller coupled two-stage water collection and distribution device air conditioning system operating in summer;
fig. 3 is a working condition schematic diagram of a two-stage water collecting and distributing device air conditioning system with four-pipe energy elevators and water chilling units coupled in winter and transition seasons.
Description of the reference symbols
The system comprises a water chilling unit 1, a four-pipe energy hoist 2, an outdoor heat exchange system 3, a first air-conditioning cold water circulating pump 4, a second air-conditioning cold water circulating pump 5, a first-stage cold water collector 6, a first-stage cold water separator 7, a constant pressure device of the air-conditioning cold water system 8, a hot water circulating pump 9, a first-stage hot water collector 10, a first-stage hot water separator 11, a constant pressure device of the air-conditioning hot water system 12, a second-stage cold/hot water collector 13, a second-stage cold/hot water separator 14, a first evaporator 21, a first condenser 22, a second evaporator 23, a second condenser 24, a first valve 31, a second valve 32, a third valve 33 and a fourth valve 34.
Detailed Description
In order to make the structure of the present invention more clear and complete, the present invention is further described below with reference to the accompanying drawings.
As shown in fig. 1: a four-pipe energy hoist and two-stage water collecting and distributing device air conditioning system of water chilling unit coupling, it includes water chilling unit 1, four-pipe energy hoist 2, outdoor side heat exchange system 3, the first air conditioner cold water circulating pump 4, the second air conditioner cold water circulating pump 5, the first grade cold water collector 6, the first grade cold water distributor 7, the air conditioner cold water system constant pressure device 8, the air conditioner hot water circulating pump 9, the first grade hot water collector 10, the first grade hot water distributor 11, the air conditioner hot water system constant pressure device 12, the second grade is cold/hot water collector 13, the second grade is cold/hot water distributor 14, the switching valve, pressure difference by-pass valve set;
a water supply pipe of a first evaporator 21 of the water chilling unit 1 and a cold water supply pipe of a second evaporator 23 of the four-pipe energy elevator 2 are connected into a first-stage cold water separator 7; meanwhile, the first-stage cold water separator 7 is connected with two cold water supply branch pipes, one branch is connected with a cold water supply pipe at the tail end of an air conditioner of a year-round cold supply loop, and the other branch is connected with a second-stage cold/hot water separator 14;
two cold water return branch pipes are connected to a primary cold water collector 6, one is a cold water return pipe at the tail end of an air conditioner of a year-round cooling loop, and the other is a return pipe connected from a secondary cold/hot water collector 13;
two paths of cold water return pipes are connected from the primary cold water collector 6, and one path of cold water return pipes is pressurized and flows back to the first evaporator 21 of the water chilling unit 1 through the first air-conditioning cold water circulating pump 4 and becomes air-conditioning cold water after heat exchange; one path is pressurized by a second air conditioner cold water circulating pump 5, flows back to a second evaporator 23 of the four-pipe energy elevator 2 and becomes air conditioner cold water after heat exchange;
a bypass pipe is arranged between the cold water collector 6 and the cold water separator 7, and a differential pressure bypass valve group is arranged on the bypass pipe; the cold water collector 6 is connected with a constant pressure device 8 of an air conditioner cold water system;
a hot water supply pipe of a second condenser 24 of the four-pipe energy hoisting machine 2 is connected to the first-stage hot water separator 11; meanwhile, the first-stage hot water separator 11 is connected with two hot water supply branch pipes, one is connected with a hot water supply pipe at the tail end of an air conditioner of a annual heat supply loop, and the other is connected with a second-stage cold/hot water separator 14;
two hot water return branch pipes are connected into a first-stage hot water collector 10, one is a hot water return pipe at the tail end of an air conditioner of a annual heat supply loop, and the other is a return pipe connected out of a second-stage cold/hot water collector 13;
a branch pipe connected from the first-stage hot water collector 10 is pressurized by an air-conditioning hot water circulating pump 9, flows back to a second condenser 24 of the four-pipe energy hoist 2 and is subjected to heat exchange to form water supply for air-conditioning hot water;
a bypass pipe is arranged between the first-stage hot water collector 10 and the first-stage hot water separator 11, and a differential pressure bypass valve group is arranged on the bypass pipe; the primary hot water collector 10 is connected with a constant pressure device 12 of an air-conditioning hot water system;
the second-stage cold/hot water collector 13 is connected with a cold/hot water return pipe at the tail end of the air conditioner, and the second-stage cold/hot water separator 14 is connected with a cold/hot water supply pipe at the tail end of the air conditioner;
the first condenser 22 of the water chilling unit 1 is connected with the outdoor heat exchange system 3.
The four-tube energy hoister is called a four-tube air cooling heat pump, adopts a double-compressor design, is internally provided with an auxiliary heat balance heat exchanger, can not only recover heat during cooling, but also recover cold during heating, and emits redundant cold or heat to the outside through the auxiliary heat balance heat exchanger. Therefore, the comprehensive energy efficiency ratio of the simultaneous refrigeration and heating is extremely high, the cooling and heating requirements of different proportions can be flexibly met at any time, the defects of the patent ZL201510631865.2 can be well overcome by only starting the set of equipment in winter, and the cooling and heating requirements in winter can be met more efficiently, conveniently and flexibly.
The outdoor heat exchange system 3 connected with the water chilling unit 1 comprises an outdoor heat exchange pipeline connected with an outdoor medium and a medium storage device, and the corresponding outdoor heat exchange system 3 is set by selecting the outdoor heat exchange medium:
when the water quantity of the underground water is sufficient, the water quality and the water temperature are proper and the underground water is allowed to be directly taken, the outdoor heat exchange system 3 can directly take the underground water as a heat exchange medium;
b, in the area where the surface water is sufficient in quantity, proper in water quality and temperature and allowed to be directly taken, the outdoor heat exchange system 3 can directly take the surface water as a heat exchange medium;
c, in the areas where the water quantity is insufficient, the water quality and the water temperature are not suitable, and the water body is not allowed to be directly used, the outdoor heat exchange pipeline is a buried pipe, the medium storage device is a cooling tower, and the outdoor heat exchange cold system 3 adopts a mode of combining the buried pipe with the cooling tower;
d, the medium storage device is a cooling tower, and the outdoor heat exchange system (3) adopts outdoor air as a heat exchange medium.
The air-conditioning cold water system constant pressure device 8 and the air-conditioning hot water constant pressure device 12 are any one of expansion water tank constant pressure, air pressure tank constant pressure and variable frequency water supplementing constant pressure.
The number of the cold water supply pipe at the tail end of the air conditioner connected with the annual cold supply loop and the cold water return pipe at the tail end of the air conditioner, the hot water supply pipe at the tail end of the air conditioner connected with the annual heat supply loop and the hot water return pipe at the tail end of the air conditioner, the cold/hot water supply pipe at the tail end of the air conditioner connected with the cold and hot switching loop and the cold/hot water return pipe at the tail end of the air conditioner are respectively at least one, and the secondary cold/hot water separator and the secondary cold/.
A two-stage water collecting and distributing device air conditioning system with a four-pipe energy hoister and a water chilling unit coupled can realize switching of three working conditions, namely summer working conditions, winter working conditions and transition season working conditions, by starting and stopping equipment and switching on and off a switching valve. The specific switching mode is as follows:
the summer working condition schematic diagram is shown in fig. 2:
the method comprises the steps that a water chilling unit 1 supplies cold and a four-pipe energy hoist 2 supplies cold and heat simultaneously, an outdoor side heat exchange system 3 operates, a first air-conditioning cold water circulating pump 4, a second air-conditioning cold water circulating pump 5 operates, an air-conditioning hot water circulating pump 9, an air-conditioning cold water system constant pressure device 8 operates, an air-conditioning hot water system constant pressure device 12, a second valve 32 and a fourth valve 34 in a switching valve are opened, and a first valve 31 and a third valve 33 in the switching valve are closed.
The working flow of working conditions in winter and transition seasons is shown in fig. 3:
the four-pipe energy hoister 2 is preferentially used for supplying cold and heat simultaneously (the water chilling unit 1 is started for supplying cold when cold energy is insufficient), the second air-conditioning cold water circulating pump 5 is operated (the first air-conditioning cold water circulating pump 4 is started for operation when cold energy is insufficient), the air-conditioning hot water circulating pump 9, the air-conditioning cold water system constant pressure device 8 is operated, the air-conditioning hot water circulating pump 9 is operated, the air-conditioning hot water system constant pressure device 12 is operated, the first valve 31 and the third valve 33 in the switching valve are opened, and the second valve 32 and the fourth valve 34 in the switching valve are closed.
The following is a specific application of the two-stage water collecting and distributing device air conditioning system with the four-pipe energy hoisting machine coupled with the water chilling unit (the overall layout and connection relationship of the system are not disclosed in the outside):
the application is located in Fuzhou city, and the total building area is about 226,969m2It is a large hospital building. The engineering mainly comprises a medical comprehensive building, including an outpatient building, a medical technology building, a south ward building, a north ward building, a scientific research and administrative medicine center building, a matched building, and a building area of 220,400m 211 floors above ground, 2 floors below ground and building height 49.95 m. Infected building area 5,027m23 floors above ground, building height 14.4 m.
The air conditioner calculation parameters are selected according to Fuzhou (belonging to hot summer and warm winter areas). Wherein, the outdoor dry bulb temperature of the air conditioner in summer is 35.9 ℃, and the wet bulb temperature is 28 ℃; the air conditioner in winter calculates the temperature to be 4.4 ℃ and the relative humidity to be 74 percent. The air conditioner cooling load is about 22883.5Kw, and the air conditioner heating load is about 6760.7 Kw.
The air conditioning system is a two-stage water collecting and distributing device air conditioning system with four-pipe energy elevators and water chilling units coupled. The requirements of annual cooling and heating of a clean area, annual cooling of other areas in other areas, cold and heat switching of the outer areas and the like are fully considered, and the air-conditioning water supply mode is as follows:
the cold and heat source of the air conditioner adopts a combination form of an ultra-efficient centrifugal chiller and a four-pipe energy hoister, the water-cooling chiller is arranged in an underground two-layer freezer room, and the four-pipe energy hoister is arranged on the roof of a north ward building.
The configuration of the project is as follows:
1, a water chilling unit:
2 fixed-frequency centrifugal water chilling units with rated refrigerating capacity of 7034KW are provided;
1 variable-frequency centrifugal water chilling unit with rated refrigerating capacity of 3517 KW;
2, four-pipe energy hoister:
the four-tube energy hoisting unit has 4 units, wherein the rated refrigerating capacity of each unit is 1337KW, and the rated heating capacity of each unit is 1674 Kw;
3 outdoor side heat transfer system, the outdoor side heat transfer system of cooling water set adopts traditional cooling tower system:
rated flow of 800m of single cooling tower35 in total;
an outdoor heat exchange system of the four-pipe energy hoister adopts an air cooling system and is selected according to units;
4, a first air conditioner cold water circulating pump:
single flow 950m3H, the lift is 35m, 3 stations are used, and 2 stations are used for 1;
single flow 475m3H, the lift is 37m, 2 stands in total, and 1 stand by 1;
4, a second air conditioner cold water circulating pump:
single flow 210m3H, the lift is 37m, 5 stands in total, and 4 stands by 1;
6, primary cold water collector: d900xL 9200;
7, primary cold water separator: d9000xL 9000;
8, air-conditioning cold water system constant-pressure device: a variable frequency water supplementing and pressure fixing device;
9 air-conditioning hot water circulating pump:
single flow rate 250m3H, the lift is 28m, 5 stands in total, and 4 stands by 1;
10 first-level hot water collector: d700xL 5800;
11 first-stage hot water separator: d700xL 5500;
12 air conditioner cold water system constant pressure device: a variable frequency water supplementing and pressure fixing device;
13 secondary cold/hot water collector (1): d800xL 5000;
secondary cold/hot water collector (2): d800xL 4600;
14 two-stage cold/hot water separator (1): d800xL 5000;
a secondary cold/hot water separator (2): d800xL 4600;
31. 32, 33 switching valve: the number of valves is 4.
Claims (5)
1. The utility model provides a two-stage collection water knockout drum air conditioning system of four pipe system energy lifting machine and cooling water set coupling which characterized in that: the system comprises a water chilling unit (1), a four-pipe energy hoist (2), an outdoor side heat exchange system (3), a first air conditioner cold water circulating pump (4), a second air conditioner cold water circulating pump (5), a first-stage cold water collector (6), a first-stage cold water separator (7), an air conditioner cold water system constant pressure device (8), an air conditioner hot water circulating pump (9), a first-stage hot water collector (10), a first-stage hot water separator (11), an air conditioner hot water system constant pressure device (12), a second-stage cold/hot water collector (13), a second-stage cold/hot water separator (14), a switching valve and a differential pressure bypass valve set;
a water supply pipe of a first evaporator (21) of the water chilling unit (1) and a cold water supply pipe of a second evaporator (23) of the four-pipe energy hoist (2) are both connected into a first-stage cold water separator (7); meanwhile, the first-stage cold water separator (7) is connected with two cold water supply branch pipes, one branch is connected with a cold water supply pipe at the tail end of an air conditioner of a year-round cold supply loop, and the other branch is connected with a second-stage cold/hot water separator (14);
two cold water return branch pipes are connected into a primary cold water collector (6), one is a cold water return pipe at the tail end of an air conditioner of a year-round cooling loop, and the other is a return pipe connected out of a secondary cold/hot water collector (13);
two paths of cold water return pipes are connected from a first-stage cold water collector (6), and one path of cold water returns to a first evaporator (21) of the water chilling unit (1) under pressure through a first air conditioner cold water circulating pump (4) and becomes air conditioner cold water after heat exchange; one path is pressurized by a second air conditioner cold water circulating pump (5), flows back to a second evaporator (23) of the four-pipe energy hoist (2) and becomes air conditioner cold water after heat exchange;
a bypass pipe is arranged between the cold water collector (6) and the cold water distributor (7), and a differential pressure bypass valve group is arranged on the bypass pipe; the cold water collector (6) is connected with a constant pressure device (8) of an air conditioner cold water system;
a hot water supply pipe of a second condenser (24) of the four-pipe energy hoisting machine (2) is connected to a first-stage hot water separator (11); meanwhile, the first-stage hot water separator (11) is connected with two hot water supply branch pipes, one branch is connected with a hot water supply pipe at the tail end of an air conditioner of the annual heat supply loop, and the other branch is connected with a second-stage cold/hot water separator (14);
two hot water return branch pipes are connected into a primary hot water collector (10), one is a hot water return pipe at the tail end of an air conditioner of a annual heat supply loop, and the other is a return pipe connected out of a secondary cold/hot water collector (13);
a branch pipe is connected from the first-stage hot water collector (10) and is pressurized by an air-conditioning hot water circulating pump (9), and the pressurized branch pipe flows back to a second condenser (24) of the four-pipe energy hoisting machine (2) and becomes air-conditioning hot water for water supply after heat exchange;
a bypass pipe is arranged between the first-stage hot water collector (10) and the first-stage hot water separator (11), and a differential pressure bypass valve group is arranged on the bypass pipe; the primary hot water collector (10) is connected with a constant pressure device (12) of the air-conditioning hot water system;
the second-stage cold/hot water collector (13) is connected with a cold/hot water return pipe at the tail end of the air conditioner, and the second-stage cold/hot water separator (14) is connected with a cold/hot water supply pipe at the tail end of the air conditioner;
the first condenser (22) of the water chilling unit (1) is connected with the outdoor heat exchange system (3).
2. The two-stage water collecting and distributing device air conditioning system with the four-pipe energy hoisting machine and the water chilling unit coupled according to claim 1, wherein:
the outdoor heat exchange system (3) connected with the water chilling unit (1) comprises an outdoor heat exchange pipeline connected with an outdoor medium and a medium storage device, and the corresponding outdoor heat exchange system (3) is set by selecting the outdoor heat exchange medium:
when the outdoor heat exchange system (3) is used in an area where the groundwater has sufficient water quantity and proper water quality and temperature and the groundwater is allowed to be directly taken, the groundwater can be directly taken as a heat exchange medium;
(b) in the areas where the surface water is sufficient in quantity, proper in water quality and temperature and allowed to be directly taken, the outdoor heat exchange system (3) can directly take the surface water as a heat exchange medium;
(c) in the areas where the water quantity is insufficient, the water quality and the water temperature are not suitable, and the water body is not allowed to be directly used, the outdoor heat exchange pipeline is a buried pipe, the medium storage device is a cooling tower, and the outdoor heat exchange system (3) adopts a mode of combining the buried pipe with the cooling tower;
(d) the medium storage device is a cooling tower, and the outdoor heat exchange system (3) adopts outdoor air as a heat exchange medium.
3. The two-stage water collecting and distributing device air conditioning system with the four-pipe energy hoisting machine and the water chilling unit coupled according to claim 1, wherein: the air conditioner cold water system constant pressure device (8) and the air conditioner hot water constant pressure device (12) are any one of expansion water tank constant pressure, air pressure tank constant pressure and variable frequency water supplementing constant pressure.
4. The two-stage water collecting and distributing device air conditioning system with the four-pipe energy hoisting machine and the water chilling unit coupled according to claim 1, wherein: the number of the cold water supply pipe at the tail end of the air conditioner connected with the annual cold supply loop and the cold water return pipe at the tail end of the air conditioner, the hot water supply pipe at the tail end of the air conditioner connected with the annual heat supply loop and the hot water return pipe at the tail end of the air conditioner, the cold/hot water supply pipe at the tail end of the air conditioner connected with the cold and hot switching loop and the cold/hot water return pipe at the tail end of the air conditioner are respectively at least one, and the secondary cold/hot water separator and the secondary cold/.
5. The use method of the two-stage water collecting and distributing device air conditioning system with the four-pipe energy hoisting machine and the high-efficiency water chilling unit coupled according to any one of claims 1 to 4 is characterized in that: it is divided into summer working condition, winter working condition and transition season working condition:
the working process of the summer working condition is as follows:
the method comprises the steps that a water chilling unit (1) supplies cold, a four-pipe energy-producing elevator (2) supplies cold and heat simultaneously, an outdoor heat exchange system (3) runs, a first air-conditioning cold water circulating pump (4), a second air-conditioning cold water circulating pump (5) runs, an air-conditioning hot water circulating pump (9), an air-conditioning cold water system constant pressure device (8) runs, an air-conditioning hot water system constant pressure device (12), a second valve (32) and a fourth valve (34) in a switching valve are opened, and a first valve (31) and a third valve (33) in the switching valve are closed;
the working process of the working conditions in winter and transition seasons is as follows:
the four-pipe energy hoister (2) is preferentially used for simultaneously supplying cold and heat (the cold water unit (1) is started for supplying cold when the cold quantity is insufficient), the second air-conditioning cold water circulating pump (5) is operated (the first air-conditioning cold water circulating pump (4) is started for operation when the cold quantity is insufficient), the air-conditioning hot water circulating pump (9), the air-conditioning cold water system constant pressure device (8) is operated, the air-conditioning hot water circulating pump (9) is operated, the air-conditioning hot water system constant pressure device (12) is operated, the first valve (31) and the third valve (33) in the switching valve are opened, and the second valve (32) and the fourth valve (34) in the switching valve are closed.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110319520.9A CN112856646A (en) | 2021-03-25 | 2021-03-25 | Two-stage water collecting and distributing device air conditioning system with four-pipe energy hoist and water chilling unit coupled and using method thereof |
| CN202110956151.4A CN113639349B (en) | 2021-03-25 | 2021-08-19 | Two-stage water collecting and distributing device air conditioning system with four-pipe energy lifting machine and water chilling unit coupled and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110319520.9A CN112856646A (en) | 2021-03-25 | 2021-03-25 | Two-stage water collecting and distributing device air conditioning system with four-pipe energy hoist and water chilling unit coupled and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112856646A true CN112856646A (en) | 2021-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110319520.9A Pending CN112856646A (en) | 2021-03-25 | 2021-03-25 | Two-stage water collecting and distributing device air conditioning system with four-pipe energy hoist and water chilling unit coupled and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112856646A (en) |
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- 2021-03-25 CN CN202110319520.9A patent/CN112856646A/en active Pending
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