CN216114447U - Water source VRF air conditioning system coupled with all-year cooling system - Google Patents
Water source VRF air conditioning system coupled with all-year cooling system Download PDFInfo
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- CN216114447U CN216114447U CN202122339744.4U CN202122339744U CN216114447U CN 216114447 U CN216114447 U CN 216114447U CN 202122339744 U CN202122339744 U CN 202122339744U CN 216114447 U CN216114447 U CN 216114447U
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Abstract
The utility model aims to provide a water source VRF air conditioning system coupled with a year-round cooling system. The system comprises a closed cooling tower, an open cooling tower, a year-round cold supply and water chilling unit, a water-water heat exchanger, a water source VRF air conditioner outdoor unit, a water source VRF air conditioner indoor unit, a cooling water loop circulating water pump, a chilled water loop circulating water pump, a water source VRF air conditioner water loop circulating water pump, pipeline valves and the like; the water source VRF air conditioner outdoor unit is connected with the water source VRF air conditioner indoor unit through a refrigerant pipe; the components are orderly connected to construct the water source VRF air conditioning water loop, the cooling water loop and the chilled water loop, and the on-off of the three water loops are controlled, so that the conversion between the cooling working condition and the simultaneous cooling and heating working condition is realized, when the water source VRF air conditioning water loop needs additional heat supply in winter, the 'free heat dissipation capacity' of the all-year cooling and water chilling unit in winter is fully utilized, the complementary allocation and transfer of heat among different air conditioning systems are realized, and the energy utilization efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of air conditioning systems, and particularly relates to a water source VRF air conditioning system coupled with a year-round cooling system.
Background
The realization of carbon peak reaching and carbon neutralization is a wide and profound systematic change of the economic society, and therefore, the comprehensive low-carbon transformation of the economic society needs to be promoted. As one of the main sources of energy consumption and carbon emission, the construction industry needs to turn to low carbon or even zero carbon.
The energy consumption system for the large public building in China has low energy efficiency and serious energy waste, and the air conditioning energy consumption accounts for more than 60% of the total energy consumption of the public building and is an energy consumer of the public building, so that the creation of a green and efficient air conditioning system is an important measure for pushing the green building and realizing energy conservation and emission reduction.
The public building has large area and complex functions, and the difference between the inner area and the outer area of the air conditioner is more and more obvious due to the increase of the building depth. Wherein the inner zone requires the air conditioning system to supply cold throughout the year; the outer area has the difference air-conditioning needs of cooling in summer and heating in winter; in addition, areas such as data centers and refrigeration houses have annual cooling demands. For such a comprehensive building with annual cooling demand and comfortable air conditioning, the traditional air conditioning mode is to directly or indirectly consume primary energy (such as coal-fired and oil-fired gas-fired boilers) to supply heat to the outer region, and simultaneously consume certain energy (such as power consumption of a cooling tower and a water chilling unit) and the like to supply cooling to the inner region and a data machine room or a refrigeration house and the like. This approach ignores the reusability of heat dissipation within the system, resulting in wasted energy. Therefore, the method for deeply exploring the cold and heat load complementary allocation mode and developing the energy-saving design concept of the air conditioning system is an important direction for realizing the green and low-carbon goal of public buildings.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defect that the traditional air conditioning system is lack of complementary recycling of cold and heat loads in the system, and provides a healthy, comfortable, efficient, green and low-carbon water source VRF air conditioning system coupled with a year-round cooling system.
The utility model is realized by the following technical scheme: a water source VRF air conditioning system coupled with a year-round cooling system comprises a closed cooling tower 1, an open cooling tower 2, a year-round cooling water chilling unit 3, a water-water heat exchanger 4, a water source VRF air conditioning outdoor unit 5, a water source VRF air conditioning indoor unit 6, a cooling water loop circulating water pump 7, a chilled water loop circulating water pump 8, a water source VRF air conditioning water loop circulating water pump 9, pipeline valves, a water distributor 11 and a water collector 12;
the annual cold supply water chilling unit 3 comprises a condenser 3-1 and an evaporator 3-2, the water-water heat exchanger 4 comprises a hot supply side 4-1 and a hot absorption side 4-2, and the pipeline valve comprises a three-way regulating valve 10-1, a second switch valve 10-2 and a third switch valve 10-3; the water source VRF air conditioner outdoor unit 5 is connected with the water source VRF air conditioner indoor unit 6 through a refrigerant pipe;
the closed cooling tower 1, the third switch valve 10-3, the water source VRF air-conditioning water loop circulating water pump 9, the water separator 11, the water source VRF air-conditioning outdoor unit 5 and the water collector 12 are sequentially arranged and connected through a pipeline to form a first circulating pipeline;
the heat absorption side 4-2, the second switch valve 10-2, the water source VRF air-conditioning water loop circulating water pump 9, the water distributor 11, the water source VRF air-conditioning outdoor unit 5 and the water collector 12 are sequentially arranged and connected through a pipeline to form a second circulating pipeline;
the open cooling tower 2, the cooling water loop circulating water pump 7, the condenser 3-1 and the three-way regulating valve 10-1 are sequentially arranged and connected through a pipeline to form a cooling water circulating pipeline;
a pipeline is led out from the three-way regulating valve 10-1 and is connected with a water inlet end of a heat supply side 4-1, a water outlet end of the heat supply side 4-1 is connected to an open cooling tower 2, and a cooling water branch circulation pipeline which is formed by sequentially arranging the open cooling tower 2, a cooling water loop circulation water pump 7, a condenser 3-1, the three-way regulating valve 10-1 and the heat supply side 4-1 is formed;
the evaporator 3-2, the chilled water loop circulating water pump 8 and the annual cooling air conditioner terminal equipment are arranged in sequence and connected through a pipeline to form a chilled water circulating pipeline.
Compared with the prior art, the utility model has the beneficial effects that:
1. a water source VRF air conditioning system framework coupled with a year-round cooling system is constructed, when the water source VRF air conditioning water loop needs additional heat supplement in winter, the 'free heat dissipation capacity' of the year-round cooling water chilling unit in winter is fully utilized, the complementary allocation and transfer of heat among different air conditioning systems are realized, and the energy utilization efficiency is improved;
2. the annual cooling water chilling unit serves a building area with annual cooling demand, the cooling energy efficiency of the annual cooling water chilling unit is increased along with the decrease of the cooling water temperature, the cooling water temperature can be effectively reduced in the process of supplying heat to the water source VRF air conditioning system, the energy efficiency of the water chilling unit is improved, and the overall energy consumption level is further reduced;
3. the year-round cooling water chilling unit adopts the water-cooling type condenser, the condensing temperature is lower than that of a traditional air source VRF air conditioning system during refrigeration, and the energy efficiency ratio is higher and the installed power is lower compared with the refrigeration operation working condition;
6. the tail end of the water source VRF air conditioning system is flexibly controlled, the difference requirements of each air conditioning area on indoor temperature and humidity can be met, and the behavior energy conservation is promoted;
5. when different water source VRF air conditioning units in the same water loop have the conditions of simultaneous cooling and heating, the effect of mutually offsetting and neutralizing cold and heat loads can be realized in the water loop of the water source VRF air conditioning unit in advance, and the operation energy consumption is reduced;
6. the water source VRF air conditioning system equipment occupies small space and is flexible in arrangement. This system concentrates the setting in roofing, equipment computer lab or water pump room with main high noise or heat dissipation equipment (closed cooling tower, open cooling tower, year round cooling water set, water pump), effectively integrates and utilizes the equipment space, compares in traditional air source VRF system, and more green efficient can build more quiet pleasing building environment simultaneously.
Drawings
FIG. 1 is a schematic flow diagram of a water source VRF air conditioning system coupled with a year-round cooling system
FIG. 2 is a schematic diagram of the cooling condition of a VRF air conditioning system coupled to a year round cooling system;
fig. 3 is a schematic diagram of the working condition of simultaneous cooling and heating of a water source VRF air conditioning system coupled with a year-round cooling system.
Description of reference numerals: the system comprises a cooling tower 1, an open cooling tower 2, a year-round cold supply water chilling unit 3, a condenser 3-1, an evaporator 3-2, a water-water heat exchanger 4, a heat supply side 4-1, a heat absorption side 4-2, a water source VRF air conditioner outdoor unit 5, a water source VRF air conditioner indoor unit 6, a cooling water loop circulating water pump 7, a chilled water loop circulating water pump 8, a water source VRF air conditioner water loop circulating water pump 9, a three-way regulating valve 10-1, a second switch valve 10-2, a third switch valve 10-3, a pipeline valve 11, a water separator 11 and a water collector 12.
Detailed Description
The utility model is described in detail below with reference to the following description of the drawings:
as shown in fig. 1: a water source VRF air conditioning system coupled with a year-round cooling system comprises a closed cooling tower 1, an open cooling tower 2, a year-round cooling water chilling unit 3, a water-water heat exchanger 4, a water source VRF air conditioning outdoor unit 5, a water source VRF air conditioning indoor unit 6, a cooling water loop circulating water pump 7, a chilled water loop circulating water pump 8, a water source VRF air conditioning water loop circulating water pump 9, pipeline valves, a water distributor 11 and a water collector 12;
the annual cold supply water chilling unit 3 comprises a condenser 3-1 and an evaporator 3-2, the water-water heat exchanger 4 comprises a hot supply side 4-1 and a hot absorption side 4-2, and the pipeline valve comprises a three-way regulating valve 10-1, a second switch valve 10-2 and a third switch valve 10-3; the water source VRF air conditioner outdoor unit 5 is connected with the water source VRF air conditioner indoor unit 6 through a refrigerant pipe;
the closed cooling tower 1, the third switch valve 10-3, the water source VRF air-conditioning water loop circulating water pump 9, the water separator 11, the water source VRF air-conditioning outdoor unit 5 and the water collector 12 are sequentially arranged and connected through a pipeline to form a first circulating pipeline;
the heat absorption side 4-2, the second switch valve 10-2, the water source VRF air-conditioning water loop circulating water pump 9, the water distributor 11, the water source VRF air-conditioning outdoor unit 5 and the water collector 12 are sequentially arranged and connected through a pipeline to form a second circulating pipeline;
the open cooling tower 2, the cooling water loop circulating water pump 7, the condenser 3-1 and the three-way regulating valve 10-1 are sequentially arranged and connected through a pipeline to form a cooling water circulating pipeline;
a pipeline is led out from the three-way regulating valve 10-1 and is connected with a water inlet end of a heat supply side 4-1, a water outlet end of the heat supply side 4-1 is connected to an open cooling tower 2, and a cooling water branch circulation pipeline which is formed by sequentially arranging the open cooling tower 2, a cooling water loop circulation water pump 7, a condenser 3-1, the three-way regulating valve 10-1 and the heat supply side 4-1 is formed;
the evaporator 3-2, the chilled water loop circulating water pump 8 and the annual cooling air conditioner terminal equipment are arranged in sequence and connected through a pipeline to form a chilled water circulating pipeline.
The air-conditioning circulating water in the first circulating pipeline and the second circulating pipeline can be distributed to the water source VRF air-conditioning outdoor unit 5 of a plurality of air-conditioning subareas through the water separator 11 and the water collector 1). VRF in the present invention is called Variable refrigerant Flow in English, that is, Variable refrigerant Flow.
Furthermore, the utility model also comprises a constant pressure device 13, and the refrigeration cooling water circulation pipeline, the first circulation pipeline and the second circulation pipeline are all connected with the constant pressure device 13.
The constant pressure device 13 is any one of constant pressure of a high-level expansion water tank, constant pressure of a water supply pump and constant pressure of a gas constant pressure tank.
It can be seen from fig. 1 that the circulation line of the present invention can be roughly classified into three types according to functional use;
the first type is a water source VRF air conditioning water loop (comprising a first circulation pipeline and a second circulation pipeline).
The circulating water supply of the water source VRF air-conditioning water loop is pressurized by the air-conditioning water loop circulating water pump 9, is distributed to the water source VRF air-conditioning outdoor unit 5 of each air-conditioning partition through the water separator 11 for heat exchange, becomes circulating water return after heat exchange, and converges to the water collector 12. The water collector 12 is branched into two branches, one branch is connected with the closed cooling tower, and the corresponding electric switch valve 10-3 is arranged on the pipeline (the branch corresponds to the first circulation pipeline). The other branch pipe is connected with the heat absorption side 4-2 of the water-water heat exchanger 4, and a corresponding electric switch valve 10-2 is arranged on the pipeline (the branch pipe corresponds to the second circulation pipeline). Circulating water treated by the heat absorption side 4-2 of the closed cooling tower 1 or the water-water heat exchanger 4 becomes water supply, and the two branches converge and then return to the air-conditioning water loop circulating water pump 9 to form a water source VRF air-conditioning water loop. A constant pressure device 13 is arranged at the inlet of the air-conditioning water loop circulating water pump 9;
and a second type of cooling water loop (comprising a cooling water circulation pipeline and a cooling water branch circulation pipeline).
The cooling water supply of the cooling water loop is pressurized by a cooling water loop circulating water pump 7, is returned by a condenser 3-1 of the year-round cooling water chilling unit 3, and is respectively connected with two branch pipes by an electric three-way regulating valve 10-1: one path is connected with a heat supply side 4-1 (corresponding to a cooling water branch circulation pipeline) of the water-water heat exchanger 4; one path is a bypass pipe (corresponding to a cooling water circulation pipeline); after the two paths are combined, the water is connected to the open cooling tower 2 for heat exchange to form water supply, and then the water returns to a cooling water loop circulating water pump 7 to form a cooling water loop;
the second type of chilled water loop (i.e., chilled water circulation line).
The chilled water return water of the chilled water loop at the side of the water chilling unit is pressurized by a chilled water loop circulating water pump 8, becomes water supply after heat exchange of an evaporator 3-2 of the annual cold supply water chilling unit 3, is connected to terminal equipment (the terminal of an indoor air conditioner) of an annual cold supply air conditioner, becomes return water after heat exchange, returns to the chilled water loop circulating water pump 8 to form a chilled water loop, and a constant pressure device 13 is arranged at the inlet of the chilled water loop circulating water pump 8;
the utility model discloses a using method of a water source VRF air conditioning system coupled with a year-round cooling system, which comprises the following working conditions of cooling and simultaneous cooling and heating:
as shown in fig. 2: the working state of the cooling working condition is as follows:
starting a cooling water loop circulating water pump 7, a chilled water loop circulating water pump 8 and a water source VRF air-conditioning water loop circulating water pump 9, controlling a three-way regulating valve 10-1, closing a second switch valve 10-2 and a water-water heat exchanger 4, starting a third switch valve 10-3, and starting a closed cooling tower 1, an open cooling tower 2 and a year-round cold water supply chiller 3; the first circulation pipeline, the cooling water circulation pipeline and the refrigeration cooling water circulation pipeline are enabled, and the second circulation pipeline and the cooling water branch circulation pipeline are disabled.
Specifically, in the working state of the cold supply working condition, the water source VRF air conditioner outdoor unit 5 and the water source VRF air conditioner indoor unit 6 are in cold supply operation, the air conditioner water loop circulating water pump 8 and the closed cooling tower 1 are in operation, the electric switch valve 10-3 on the corresponding pipeline is opened, the water-water heat exchanger 4 is not in operation, and the electric switch valve 10-2 is closed. The open cooling tower 2, the year round cold supply water chilling unit 3 and the cooling water loop circulating water pump 7 of the cooling water loop operate, the water-water heat exchanger 4 does not operate, and all water flow passing through the electric three-way regulating valve 10-1 passes through the bypass pipe.
As shown in fig. 3: the working states of the working conditions of simultaneous cooling and heating are as follows:
starting a cooling water loop circulating water pump 7, a chilled water loop circulating water pump 8, a water source VRF air-conditioning water loop circulating water pump 9, a second switch valve 10-2, a water-water heat exchanger 4, an open cooling tower 2 and a year-round cold water supply unit 3; the third switch valve 10-3 and the closed cooling tower 1 are stopped; controlling a three-way regulating valve 10-1; the first circulation pipeline, the cooling water circulation pipeline, the refrigeration cooling water circulation pipeline and the cooling water branch circulation pipeline are all started, and the second circulation pipeline is stopped.
Specifically, in the working state of the simultaneous cooling and heating working condition, the water source VRF air conditioner outdoor unit 5 and the water source VRF air conditioner indoor unit 6 of the water source VRF air conditioner water loop supply heat to operate; the air conditioner water loop circulating water pump 8 and the water-water heat exchanger 4 operate, an electric switch valve 10-2 on a corresponding pipeline is opened, the closed cooling tower 1 does not operate, and an electric switch valve 10-3 is closed.
The open cooling tower 2 of the cooling water loop, the annual cold supply water chilling unit 3 and the cooling water loop circulating water pump 7 operate, the water-water heat exchanger 4 operates, water flow passing through the electric three-way regulating valve 10-1 passes through the heat supply side 4-1 of the water-water heat exchanger 4 according to the heat requirement of the VRF air conditioning water loop, and the rest water flow passes through the bypass pipe.
The following is a specific application of a water source VRF air conditioning system coupled with a year-round cooling system (information such as arrangement of pipelines, principles and the like is not disclosed externally):
the application is located in Fuzhou city, the total building area is 35000 square meters, the building height is 94m, 21 floors are above the ground, and the building functions are mainly as follows: one floor is a hall; the second layer is a data center; more than three layers are used as office and related matched rooms.
And air conditioner calculation parameters are selected according to the Fuzhou region. The cooling load of a technical air conditioner in a data center machine room area is 3611 kW; the cooling load of the air conditioner in summer in other office areas is 7447kW, and the heating load of the air conditioner in winter is 1600 kW.
The air conditioning system adopts a year-round cooling system coupled with a water source VRF air conditioning system. The system comprises the following specific components:
(1) the data center machine room IDC air conditioner terminal and office area comfort air conditioner fresh air handling unit adopts concentrated cold source to supply, and 4 high-efficient magnetic suspension centrifugal chiller units are configured in the system, and the cold volume demand of the data center can be sufficiently ensured when any one fault occurs. And a water-water heat exchanger is arranged on the cooling water loop, so that heat is supplemented for the water loop of the VRF air conditioner of the water source in winter.
(2) The indoor load of the comfortable air conditioner in the office area is borne by the water source VRF air conditioner, and the outdoor units of the water source VRF air conditioners in all areas are connected in parallel by the water loop of the water source VRF air conditioner. A closed cooling tower is adopted for heat dissipation and cooling in summer; in winter, heat is taken from the cooling water loop of the annual cooling system through the water-water heat exchanger.
The high-efficiency magnetic suspension centrifugal water chilling unit is arranged in a first-layer equipment room; the air-conditioning water loop circulating water pump, the chilled water circulating water pump and the cooling water circulating water pump are arranged in the first-layer water pump room; the closed cooling tower, the open cooling tower and the plate type water-water heat exchanger are arranged on the roof of the main building in a centralized manner, and the VRF air-conditioning outdoor unit of the water source is arranged on equipment platforms in various areas.
The configuration of the project is as follows:
(1) a closed cooling tower:
rated water quantity of 350m for single unit 34 in total;
(2) open cooling tower
280m of rated water volume of single unit 34 in total;
(3) high-efficient magnetic suspension centrifugal year round cooling water set:
the capacity of each unit is 1300kW, the input power is 194kW, and the total number of the units is 4;
(4) water-water heat exchanger:
1 plate-type water-water heat exchangers are adopted, and the rated heat exchange amount is 1630 kW;
(5) water source VRF air conditioner outdoor unit: 60 sets of the Chinese herbal medicines;
(6) water source VRF air-conditioning indoor unit: a plurality of the grooves are formed;
(7) cooling water loop circulating water pump:
single flow rate 260m3H, the lift is 24m, 5 stands in total, and 4 stands by 1;
(8) a chilled water loop circulating water pump:
single flow rate 280m3H, the lift is 24m, 5 stands in total, and 4 stands by 1;
(9) water source VRF air conditioner water loop circulating water pump:
single flow 245m3H, the lift is 24m, 5 stands in total, and 4 stands by 1;
(10) pipeline valve member: is matched with the equipment;
(11) water separator, 1 (12) water collector, 1;
(13) and 2 sets of constant pressure devices.
While the utility model has been illustrated and described with respect to specific embodiments and alternatives thereof, it will be understood that various changes and modifications can be made without departing from the spirit and scope of the utility model. It is understood, therefore, that the utility model is not to be in any way limited except by the appended claims and their equivalents.
Claims (3)
1. A water source VRF air conditioning system of coupling year round cooling system which characterized in that: the system comprises a closed cooling tower (1), an open cooling tower (2), a year-round cold supply water chilling unit (3), a water-water heat exchanger (4), a water source VRF air conditioner outdoor unit (5), a water source VRF air conditioner indoor unit (6), a cooling water loop circulating water pump (7), a chilled water loop circulating water pump (8), a water source VRF air conditioner water loop circulating water pump (9), pipeline valves, a water distributor (11) and a water collector (12);
the annual cold supply water chilling unit (3) comprises a condenser (3-1) and an evaporator (3-2), the water-water heat exchanger (4) comprises a heat supply side (4-1) and a heat absorption side (4-2), and the pipeline valve comprises a three-way regulating valve (10-1), a second switch valve (10-2) and a third switch valve (10-3); the water source VRF air conditioner outdoor unit (5) is connected with the water source VRF air conditioner indoor unit (6) through a refrigerant pipe;
the closed cooling tower (1), the third switch valve (10-3), the water source VRF air conditioner water loop circulating water pump (9), the water distributor (11), the water source VRF air conditioner outdoor unit (5) and the water collector (12) are sequentially arranged and connected through a pipeline to form a first circulating pipeline;
the water circulation system comprises a heat absorption side (4-2), a second switch valve (10-2), a water source VRF air conditioner water loop circulation water pump (9), a water distributor (11), a water source VRF air conditioner outdoor unit (5) and a water collector (12), which are sequentially arranged and connected through a pipeline to form a second circulation pipeline;
the open cooling tower (2), the cooling water loop circulating water pump (7), the condenser (3-1) and the three-way regulating valve (10-1) are sequentially arranged and connected through a pipeline to form a cooling water circulating pipeline;
a pipeline is led out from the three-way regulating valve (10-1) and is connected with the water inlet end of the heat supply side (4-1), the water outlet end of the heat supply side (4-1) is connected to the open cooling tower (2), and a cooling water branch circulation pipeline is formed, wherein the open cooling tower (2), the cooling water loop circulation water pump (7), the condenser (3-1), the three-way regulating valve (10-1) and the heat supply side (4-1) are sequentially arranged;
the evaporator (3-2), the chilled water loop circulating water pump (8) and the annual cooling air conditioner terminal equipment are sequentially arranged and connected through pipelines to form a chilled water circulating pipeline.
2. The VRF air conditioning system of claim 1, wherein the VRF air conditioning system is a water source coupled to a year round cooling system, and further comprising: the refrigeration cooling water circulation pipeline, the first circulation pipeline and the second circulation pipeline are all connected with the constant pressure device (13).
3. The VRF air conditioning system of claim 2, wherein the water source is a water source coupled to a year round cooling system, and wherein: the constant pressure device (13) is any one of constant pressure of a high-level expansion water tank, constant pressure of a water supply pump and constant pressure of a gas constant pressure tank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122339744.4U CN216114447U (en) | 2021-09-26 | 2021-09-26 | Water source VRF air conditioning system coupled with all-year cooling system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122339744.4U CN216114447U (en) | 2021-09-26 | 2021-09-26 | Water source VRF air conditioning system coupled with all-year cooling system |
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| CN216114447U true CN216114447U (en) | 2022-03-22 |
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| CN202122339744.4U Active CN216114447U (en) | 2021-09-26 | 2021-09-26 | Water source VRF air conditioning system coupled with all-year cooling system |
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