CN110440355B - Hydropower station temperature-regulating dehumidifying air-conditioning system and operation method thereof - Google Patents
Hydropower station temperature-regulating dehumidifying air-conditioning system and operation method thereof Download PDFInfo
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- CN110440355B CN110440355B CN201910745052.4A CN201910745052A CN110440355B CN 110440355 B CN110440355 B CN 110440355B CN 201910745052 A CN201910745052 A CN 201910745052A CN 110440355 B CN110440355 B CN 110440355B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 163
- 238000001816 cooling Methods 0.000 claims abstract description 28
- 230000006835 compression Effects 0.000 claims description 21
- 238000007906 compression Methods 0.000 claims description 21
- 238000007791 dehumidification Methods 0.000 claims description 18
- 230000033228 biological regulation Effects 0.000 claims description 10
- 238000009423 ventilation Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 4
- 238000005496 tempering Methods 0.000 claims 2
- 238000010438 heat treatment Methods 0.000 abstract description 24
- 238000005265 energy consumption Methods 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 2
- 230000001939 inductive effect Effects 0.000 abstract 1
- 230000009471 action Effects 0.000 description 7
- 238000009833 condensation Methods 0.000 description 7
- 230000005494 condensation Effects 0.000 description 7
- 239000003507 refrigerant Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000007664 blowing Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005399 mechanical ventilation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
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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
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
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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
- 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
Abstract
The application relates to the technical field of heat supply and air conditioning, and provides a hydropower station temperature-regulating and dehumidifying air conditioning system and an operation method thereof, wherein a pressureless tail water hole induced air system is fully utilized throughout the year to ventilate and cool equipment with high heat productivity; in summer and transitional seasons, the air inducing system of the pressureless tail water tunnel and the temperature-adjusting dehumidifying air treatment system are utilized to dehumidify fresh air in the personnel active area, and tail water and the indoor tail end are combined to cool the personnel active area, so that independent control of temperature and humidity is realized; the heat exhausted by the high temperature between the recovery devices is used for heating the personnel active area in winter. The system fully utilizes the natural cold source of the pressureless tail water tunnel and the heating value of power station equipment to realize the cooling, dehumidifying and heating of each functional area, has obvious energy-saving effect, and simultaneously adopts independent control of temperature and humidity, thereby obviously reducing the energy consumption of the air conditioner, saving the occupied area of the air conditioning system and reducing the investment.
Description
Technical Field
The application relates to the technical field of heat supply and air conditioning, in particular to a hydropower station temperature-regulating dehumidifying air conditioning system and an operation method thereof.
Background
The water power resources of China are rich, and along with the rapid development of economy, the water power development is in a rapid development period. The large hydropower station mostly adopts an underground workshop, is generally buried under the underground 100m, and mainly comprises a main workshop hole, a bus hole, a main transformer chamber, a tail water pressure regulating chamber and other chambers, wherein the internal space of the chambers is complex in structure, and the main workshop, the main transformer chamber, the bus hole connected with the main workshop and other main areas in which process equipment is arranged, and the heating equipment is more. The underground environment is cold in winter and moist and hot in summer, so in the underground hydropower station, the ventilation air conditioning system mainly has the following two functions: firstly, a proper working environment is provided for process equipment, and the normal and stable operation of the process equipment is ensured; secondly, the working environment is improved for personnel.
At present, a mechanical ventilation system or a ventilation air-conditioning system is generally adopted in an underground hydropower station to control the heat and humidity environment of a main plant, a bus hole, a main transformer hole and an office area of the hydropower station, the air-conditioning energy consumption is high, and the heat and humidity environment in the plant is poor in guarantee effect.
The utility model provides a hydropower station special air conditioner and dehumidifier capable of transmitting air dew point temperature control and a control method thereof for fully utilizing natural cold sources of hydropower stations. The disclosed direct expansion dehumidifying air conditioning unit comprises a primary water cooling or heating heat exchange coil section, a secondary direct evaporation cooling coil section and a tertiary direct condensation heating coil section, wherein reservoir water is adopted as a natural cold source for the primary water cooling or heating heat exchange coil, fresh air and return air are mixed, and then enter the secondary direct evaporation cooling coil section for dehumidification and cooling after being precooled or preheated by the primary water cooling or heating heat exchange coil section, then enter the tertiary direct condensation heating coil section, and finally are sent into an air conditioning area by a blower.
Although the air conditioning unit can cool and heat air by utilizing reservoir water with proper temperature of a hydropower station, the energy consumption of an air conditioning system is reduced, but the following defects are also present:
firstly, the difference of heat and humidity load and the difference of heat environment construction requirements between a personnel office area and high-heat-productivity equipment are not fully considered in the technical scheme, and in fact, natural cold sources can be fully adopted between the high-heat-productivity equipment to perform ventilation and cooling, so that the technical scheme adopts a set of air conditioning system to solve the heat environment between the personnel office area and the high-heat-productivity equipment, and the natural cold sources are difficult to fully utilize to reduce the energy consumption of the air conditioning system.
Secondly, the technical scheme adopts the direct expansion dehumidifying air-conditioning system to carry out environment construction in summer and winter, so that the air-conditioning system is realized by adjusting the proportion of fresh air to return air and the water flow of a primary water cooling or heating heat exchange coil in order to realize the adjustment of different air supply parameters in winter and summer, and has strong adjustment coupling and great adjustment difficulty.
Third, this technical scheme has adopted full air system, and return air and new trend are mixed the back and are passed through first order water cooling or heat transfer coil, second grade direct evaporative cooling coil section, tertiary direct condensation heating coil section, lead to the fan energy consumption huge, and air system area is great, increases construction cost.
Fourth, when this technical scheme supplies heat in winter, though can dehumidify the air, but mainly rely on the heat that the tertiary direct condensation heating coil section released to heat the air and supply heat to indoor, therefore require the system to dispose the heat pump set of great capacity in order to satisfy the heat supply requirement, lead to with high costs, the big problem of winter heating energy consumption.
Disclosure of Invention
First, the technical problem to be solved
In view of the technical defects and application requirements, the application provides a hydropower station temperature-regulating and dehumidifying air-conditioning system and an operation method thereof, which are used for solving the problems of high energy consumption, insufficient utilization of natural cold sources, large air quantity, high energy consumption of a fan, large occupied area, high investment and insufficient utilization of waste heat in a factory building of the conventional hydropower station air-conditioning system.
(II) technical scheme
To solve the above problems, in a first aspect, the present application provides a hydropower station temperature-adjusting dehumidifying air-conditioning system, comprising: a temperature-regulating and dehumidifying air treatment module; the temperature-adjusting and dehumidifying air treatment module comprises an air conditioning unit and a vapor compression temperature-adjusting and dehumidifying unit; the air conditioning unit comprises a box body provided with a fresh air inlet and a hot air inlet, and an evaporator, a first condenser and a blower which are arranged in the box body and are sequentially arranged along the air flowing direction; the vapor compression temperature-regulating dehumidifier unit comprises an electric three-way valve, a throttle valve, a second condenser and a compressor;
the outlet end of the evaporator is connected with the inlet end of the compressor, the outlet end of the compressor is respectively connected with the inlet end of the first condenser and the first inlet end of the second condenser, the outlet end of the first condenser is connected with the first end of the electric three-way valve, the first outlet end of the second condenser is connected with the second end of the electric three-way valve, and the third end of the electric three-way valve is connected with the inlet end of the evaporator through the throttle valve;
the air outlet of the air feeder is connected with the air outlet of the office, and the air outlet of the pressureless tail water hole is respectively connected with the new air outlet and the air outlet of the equipment room; an indoor tail end is arranged in the office, and a water circulation module is arranged between tail water of the pressureless tail water tunnel and the indoor tail end; and the air outlet of the equipment room is respectively connected with the hot air inlet and the air outlet of the office room.
Wherein the indoor end is a fan coil and/or a radiation end.
The second outlet end of the second condenser is connected with the water outlet channel of the water circulation module, and the second inlet end of the second condenser is connected with the water inlet channel of the water circulation module.
The second inlet end of the second condenser is connected with the air outlet of the office and/or the air outlet of the equipment.
In a second aspect, the present application provides an operation method of a hydropower station temperature-adjusting dehumidifying air-conditioning system provided by the above technical scheme, including:
the induced draft of the tail-free water tunnel is conveyed to the equipment room, so that the ventilation and cooling of the equipment room are realized all the year round;
in summer, an air conditioning unit and a vapor compression temperature-regulating dehumidifier unit are started, induced draft of the pressureless tail water tunnel is conveyed to a fresh air port, and fresh air after temperature regulation and dehumidification is conveyed to an air supply port of an office through an air outlet of an air feeder; starting a water circulation module to enable tail water of the pressureless tail water hole to circulate and flow between the indoor tail end and the pressureless tail water hole, and removing indoor sensible heat;
in winter, the air conditioning unit is started and the vapor compression temperature-regulating dehumidifier unit is closed, exhaust air with higher temperature between devices is conveyed to a hot air inlet of the air conditioning unit through an air outlet of the device, induced air of the pressureless tail water hole is conveyed to the fresh air inlet, and after the hot air is mixed with the fresh air, the mixture is conveyed to an air supply outlet of the office through an air outlet of the air feeder.
Wherein, still include: and tail water of the pressureless tail water hole is conveyed to the second inlet end of the second condenser through the water inlet channel of the water circulation module, and heated tail water is conveyed to the water outlet channel of the water circulation module through the second outlet end of the second condenser.
Wherein, still include: the air source is conveyed to the second inlet end of the second condenser through an air outlet of the equipment room and/or an air outlet of the office room, and the heated air source is discharged through the second outlet end of the second condenser.
(III) beneficial effects
The hydropower station temperature-regulating and dehumidifying air-conditioning system and the operation method thereof provided by the application fully utilize the pressureless tail water hole induced air system to ventilate and cool equipment with high heat productivity throughout the year; in summer and transitional seasons, the fresh air dehumidification is carried out on the office room by using the pressureless tail water hole induced draft system and the temperature-adjusting dehumidifying air treatment system, and the office room is cooled by combining tail water with the indoor tail end, so that the independent control of temperature and humidity is realized; the heat exhausted by the high temperature between the recovery devices is used for heating the office in winter. The system fully utilizes the natural cold source of the pressureless tail water tunnel and the heating value of power station equipment to realize the cooling, dehumidifying and heating of each functional area, has obvious energy-saving effect, and simultaneously adopts independent control of temperature and humidity, thereby obviously reducing the energy consumption of the air conditioner, saving the occupied area of the air conditioning system and reducing the investment.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a hydropower station temperature-regulating dehumidification air-conditioning system provided by an embodiment of the application;
fig. 2 is a schematic diagram of a water cooling mode adopted by a second condenser in the hydropower station temperature-adjusting dehumidifying air-conditioning system provided by the embodiment of the application;
fig. 3 is a schematic diagram of an air cooling mode adopted by a second condenser in the hydropower station temperature-adjusting dehumidifying air-conditioning system provided by the embodiment of the application;
FIG. 4 is a block diagram of the operation method of the hydropower station temperature-regulating dehumidifying air-conditioning system provided by the embodiment of the application;
wherein, A, a pressureless tail water hole; B. office rooms; C. the equipment room; D. an air conditioning unit; E. a temperature-regulating and dehumidifying air treatment module; 1. fresh air outside the station; 2a, a first air valve; 2b, a second air valve; 2c, a third air valve; 2d, a fourth air valve; 3. a new wind gap; 4. an air filter; 5. an evaporator; 6. a first condenser; 7. a blower; 8. an air outlet of the blower; 9. a hot air inlet; 10. a compressor; 11. a throttle valve; 12. an electric three-way valve; 13. a second condenser; 14. a cooling medium; 15. an exhaust outlet between the devices; 16. an air supply outlet between the devices; 17. an induced draft fan; 18. a first valve; 19. a water pump; 20. an air supply outlet of the office; 21. an indoor end; 22. an air outlet of the office; 23. an exhaust fan; 24. and a second valve.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Fig. 1 is a schematic diagram of a hydropower station temperature-adjusting and dehumidifying air-conditioning system according to an embodiment of the present application, as shown in fig. 1, where the hydropower station temperature-adjusting and dehumidifying air-conditioning system according to an embodiment of the present application includes: a temperature-adjusting dehumidifying air treatment module E; the temperature-adjusting and dehumidifying air treatment module E comprises an air conditioning unit D and a vapor compression temperature-adjusting and dehumidifying unit; the air conditioning unit D comprises a box body provided with a fresh air port 3 and a hot air inlet 9, and an evaporator 5, a first condenser 6 and a blower 7 which are arranged in the box body and are sequentially arranged along the air flow direction; the left side of the box body is provided with an opening matched with an air outlet 8 of the air feeder, the right side of the box body is provided with a fresh air port 3, the upper surface of the box body is provided with a hot air inlet 9, and the arrangement position of the hot air inlet 9 is positioned right above the air feeder 7;
the vapor compression temperature-regulating dehumidifier unit comprises an electric three-way valve 12, a throttle valve 11, a second condenser 13 and a compressor 10;
the outlet end of the evaporator 5 is connected with the inlet end of the compressor 10, the outlet end of the compressor 10 is respectively connected with the inlet end of the first condenser 6 and the first inlet end of the second condenser 13, the outlet end of the first condenser 6 is connected with the first end of the electric three-way valve 12, the first outlet end of the second condenser 13 is connected with the second through end of the electric three-way valve 12, and the third through end of the electric three-way valve 12 is connected with the inlet end of the evaporator 5 through the throttle valve 11;
the air outlet 8 of the air feeder is connected with the air outlet 20 of the office, and the air outlet of the pressureless tail water hole A communicated with the outside is respectively connected with the fresh air port 3 and the air outlet 16 of the equipment room.
It should be noted that, the air outlet of the pressureless tail water hole a is communicated with the air supply outlet 16 between the devices through a pipeline, the first pipeline is provided with an induced draft fan 17 and a second air valve 2b, the second air valve 2b is arranged near one side of the air supply outlet 16 between the devices, the induced draft fan 17 is arranged near one side of the air outlet of the pressureless tail water hole a, a second pipeline is arranged between the induced draft fan 17 and the second air valve 2b, the second pipeline is respectively communicated with the first pipeline and the fresh air port 3, and the second pipeline is provided with the first air valve 2a.
An air filter 4 is further provided between the fresh air port 3 and the evaporator 5, and the induced air introduced through the fresh air port 3 is first filtered by the air filter 4 and then flows through the evaporator 5.
It will be appreciated that the refrigerant absorbs heat in the direct expansion evaporator 5 and becomes low temperature and low pressure refrigerant vapor, which is then introduced into the compressor 10 and compressed into high temperature and high pressure refrigerant vapor, which is then introduced into the first condenser 6 and the second condenser 13, respectively, cooled by low temperature and low humidity induced air in the first condenser 6, cooled by the corresponding cooling medium 14 in the second condenser 13, and the condensed liquid refrigerant is introduced into the electric three-way valve 12, respectively, and is then throttled by the throttle valve 11 and then introduced into the evaporator 5 for continuous circulation, and the electric three-way valve 12 is used for adjusting the flow rate of the refrigerant in the first condenser 6 and the second condenser 13.
In the embodiment of the application, for the equipment room C with high heat productivity, such as a main factory building, a main transformer room, a bus cavity connected with the main transformer room and other process equipment, which is arranged, the annual equipment heat productivity is large, so that annual cooling is needed, the off-site fresh air 1 with high temperature and high humidity in summer is subjected to heat-humidity exchange with tail water with lower temperature through a pressureless tail water hole, and is conveyed to the air supply port 16 of the equipment room after being cooled and dehumidified, so that annual ventilation and cooling of the equipment room C are realized; for office B with centralized personnel, the indoor heating value is relatively small, so that the temperature is required to be reduced and dehumidified in summer and the heat is required to be supplied in winter.
On the basis of the embodiment, the office B is provided with an indoor tail end 21, and a water circulation module is arranged between tail water of the pressureless tail water hole and the indoor tail end 21.
In an embodiment of the application, the water circulation module comprises a water outlet channel and a water inlet channel which are communicated with each other. The water inlet channel is provided with a water pump 19 and a second valve 24, the water pump 19 is arranged on one side close to the tail water of the pressureless tail water hole, and the second valve 24 is arranged on one side close to the indoor tail end 21. Wherein the indoor end is a fan coil and/or a radiation end.
In summer, the air conditioning unit and the vapor compression temperature-regulating dehumidifier unit are started, induced air is conveyed to a new air port through an air outlet of the pressureless tail water hole, enters the air conditioning unit D, is deeply dehumidified and cooled by the evaporator 5 which is directly expanded in the air conditioning unit D, is then conveyed to an air supply port 20 of an office through an air outlet 8 of an air feeder after being subjected to temperature regulation to an air supply state point through the first condenser 6, and is subjected to temperature regulation and dehumidification for the office B. Meanwhile, the water circulation module is started, tail water enters the indoor tail end 21 of the office B under the action of the water pump 19, and indoor sensible heat is eliminated. In the transitional season, when the indoor residual heat is small, the water pump 19 may be turned off as the case may be. Therefore, the embodiment of the application adopts a mode of independent temperature and humidity control in cold supply seasons, fully utilizes the natural cold source of tail water and pressureless tail water holes to treat residual heat and residual humidity in offices by combining the dehumidification temperature-regulating air treatment module, fully utilizes the natural cold source of hydropower stations to perform heat and humidity treatment, and solves the problems of large air quantity, high energy consumption of a fan, large occupied area of an air conditioning system and high investment of the traditional all-air system.
On the basis of the above embodiment, as shown in fig. 2, the second outlet end of the second condenser 13 is connected to the water outlet channel of the water circulation module, and the second inlet end of the second condenser 13 is connected to the water inlet channel of the water circulation module.
In the embodiment of the application, another water inlet channel is arranged between the water pump 19 and the second valve 24, the other water inlet channel is respectively communicated with the water inlet channel and the second inlet end of the second condenser 13, and the other water inlet channel is provided with the first valve 18; the second outlet end of the second condenser 13 is connected to the water outlet channel of the water circulation module through another water outlet channel.
On the basis of the above embodiment, the air outlet 15 of the equipment room is connected with the hot air inlet 9 and the air outlet 22 of the office room respectively.
In the embodiment of the application, the air outlet 15 between the devices is communicated with the hot air inlet 9 through a first air duct, the first air duct is provided with a third air valve 2c, the air outlet 15 between the devices is also communicated with the air outlet 22 between the offices through a second air duct, the second air duct is provided with a fourth air valve 2d, and the second air duct is also provided with an air exhaust fan 23.
The off-site fresh air 1 with lower temperature in winter firstly carries out heat-humidity exchange with the tail water with relatively higher temperature through the pressureless tail water hole, and induced draft is conveyed to a fresh air port through an air outlet of the pressureless tail water hole, at the moment, a compressor of the vapor compression temperature-regulating dehumidifier unit is closed, and vapor compression temperature-regulating dehumidification cycle does not run; meanwhile, a third air valve 2C on an exhaust duct of the equipment room C is opened, exhaust air of the equipment room C with high heat productivity enters an air conditioning unit D through a hot air inlet 9 and is mixed with induced air preheated by tail water to a blowing state point, and then the mixed air is sent into an office B by a blower 7 to supply heat to the room, the opening of the third air valve 2C and the opening of a fourth air valve 2D are adjusted according to the temperature of the office B, and a water pump 19 does not operate at the moment.
On the basis of the above embodiment, as shown in fig. 3, the second inlet end of the second condenser 13 is connected to the air outlet 22 of the office and/or the air outlet 15 of the equipment room.
In the embodiment of the present application, a third air duct is disposed between the air outlet of the exhaust fan 23 and the second inlet end of the second condenser 13. The heat of condensation released by the refrigerant is discharged outside the station with the exhaust air through the second outlet end of the second condenser 13.
The operation method of the hydropower station temperature-adjusting dehumidifying air-conditioning system provided by the embodiment, as shown in fig. 4, includes:
s1, conveying fresh air outside the station to an air supply outlet of the equipment room through an air outlet of the pressureless tail water hole, so that the ventilation and cooling of the equipment room are realized all the year round;
s2, starting an air conditioning unit and a vapor compression temperature-regulating dehumidifier unit, conveying fresh air outside the station to a fresh air port through an air outlet of the pressureless tail water hole, and conveying the fresh air subjected to temperature regulation and dehumidification to an air supply port of an office through an air outlet of an air feeder.
In the embodiment of the application, for the equipment room C with high heat productivity, such as a main factory building, a main transformer room, a bus cavity connected with the main transformer room and other process equipment, which is arranged, the annual equipment heat productivity is large, so that annual cooling is needed, off-site fresh air with high temperature and high humidity in summer is subjected to heat-moisture exchange with tail water with lower temperature through a non-pressure tail water cavity, and after cooling and dehumidification, induced air is conveyed to an air supply port 16 of the equipment room C through an air outlet of the non-pressure tail water cavity, so that annual ventilation and cooling of the equipment room C are realized; for office B with concentrated personnel, because the indoor heating value is relatively smaller, refrigeration and dehumidification are needed in summer, and heat is needed to be supplied to a room in winter, so that the requirements of indoor personnel on health and thermal comfort are met. Starting an air conditioning unit and a vapor compression temperature-regulating dehumidifier unit, conveying induced air to a new air port through an air outlet of a pressureless tail water hole, entering an air conditioning unit D, deeply dehumidifying and cooling the air conditioning unit D by a direct expansion evaporator 5, then conveying the air conditioning unit D to an air outlet 20 of an office through an air outlet 8 of an air feeder after the air conditioning unit D is subjected to temperature regulation to an air supply state point through a first condenser 6, and performing temperature regulation and dehumidification on the office B. The system fully utilizes the natural cold source of the pressureless tail water tunnel and the heating value of power station equipment to realize the cooling, dehumidifying and heating of each functional area, has obvious energy-saving effect, and simultaneously adopts independent control of temperature and humidity, thereby obviously reducing the energy consumption of the air conditioner, saving the occupied area of the air conditioning system and reducing the investment.
On the basis of the above embodiment, the method further comprises: and starting the air conditioning unit and closing the vapor compression temperature-regulating dehumidifier unit, conveying hot air to a hot air inlet through an air outlet of the equipment room, conveying off-site fresh air to a fresh air inlet through an air outlet of the pressureless tail water hole, mixing the hot air with the fresh air, and conveying the mixture to an air outlet of the office room through an air outlet of the air feeder.
In the embodiment of the application, off-site fresh air 1 with lower temperature in winter firstly carries out heat-moisture exchange with tail water with relatively higher temperature through a pressureless tail water hole, induced draft is conveyed to a fresh air port through an air outlet of the pressureless tail water hole, at the moment, a compressor of a vapor compression temperature-regulating dehumidifier unit is closed, and vapor compression temperature-regulating dehumidifier cycle does not run; meanwhile, a third air valve 2C on an exhaust duct of the equipment room C is opened, exhaust air of the equipment room C with high heat productivity enters an air conditioning unit D through a hot air inlet 9, and after the exhaust air is mixed with off-site fresh air preheated by tail water to a blowing state point, the mixture is sent into an office B by a blower 7 to supply heat to the room, and the opening of the third air valve 2C and the opening of a fourth air valve 2D are adjusted according to the temperature of the office B.
On the basis of the above embodiment, the method further comprises: and starting the water circulation module to enable tail water in the pressureless tail water hole to circulate and flow between the indoor tail end and the pressureless tail water hole.
In the embodiment of the application, in summer, an air conditioning unit and a vapor compression temperature-regulating dehumidifier unit are started, induced air is conveyed to a new air port through an air outlet of a pressureless tail water hole, enters an air conditioning unit D, is deeply dehumidified and cooled by a direct expansion evaporator 5 in the air conditioning unit D, is subjected to temperature regulation through a first condenser 6 to an air supply state point, and is conveyed to an air supply port 20 of an office through an air outlet 8 of an air feeder, and is subjected to temperature regulation and dehumidification for the office B. Meanwhile, the water circulation module is started, tail water enters the indoor tail end 21 of the office B under the action of the water pump 19, and indoor sensible heat is eliminated. In the transitional season, when the indoor residual heat is small, the water pump 19 may be turned off as the case may be. Therefore, the application adopts a mode of independent temperature and humidity control in cold supply seasons, fully utilizes the natural cold source of tail water and pressureless tail water holes to combine with the dehumidification temperature-regulating air treatment module to treat residual heat and residual humidity in offices, fully utilizes the natural cold source of hydropower stations to perform heat and humidity treatment, and solves the problems of large air quantity, high energy consumption of a fan, large occupied area of an air conditioning system and high investment of the traditional all-air system.
On the basis of the above embodiment, the method further comprises: tail water in the pressureless tail water hole is conveyed to the second inlet end of the second condenser through the water inlet channel of the water circulation module, and heated tail water is conveyed to the water outlet channel of the water circulation module through the second outlet end of the second condenser;
or the air source is conveyed to the second inlet end of the second condenser through an air outlet of the equipment room and/or an air outlet of the office room, and the heated air source is discharged through the second outlet end of the second condenser.
In the embodiment of the application, another water inlet channel is arranged between the water pump 19 and the second valve 24, the other water inlet channel is respectively communicated with the water inlet channel and the second inlet end of the second condenser 13, and the other water inlet channel is provided with the first valve 18; the second outlet end of the second condenser 13 is connected to the water outlet channel of the water circulation module through another water outlet channel. Or, a third air pipe is arranged between the air outlet of the exhaust fan 23 and the second inlet end of the second condenser 13. The heat of condensation released by the refrigerant is discharged outside the station with the exhaust air through the second outlet end of the second condenser 13.
In the practice of the present application, for a high heat generation inter-equipment C of a process equipment arrangement such as a main plant, a main transformer room, and a bus bar cavern connected therebetween, annual cooling is required because annual equipment heat generation is large. The off-site fresh air with high temperature and high humidity in summer is subjected to heat-humidity exchange with tail water with lower temperature through a pressureless tail water hole, air quantity is regulated through a second air valve 2b after cooling and dehumidifying, the air quantity enters an equipment room C under the action of an induced draft fan 17, residual heat and residual humidity of the equipment room C are taken away and then discharged through an air outlet 15 among the equipment room, at the moment, a third air valve 2C is closed, a fourth air valve 2d is opened, and air is discharged into an air exhaust duct and is discharged under the action of an air exhaust fan 23;
the off-site fresh air with lower temperature in winter firstly carries out heat-humidity exchange with the tail water with relatively higher temperature through the pressureless tail water hole, and enters the equipment room C through the second air valve 2b under the action of the induced draft fan 17 after the temperature rises to the air supply state point, residual heat and residual humidity of the equipment room C are discharged, and the induced air temperature rises after the tail water pretreatment, so that the phenomenon of condensation on the surface of the equipment caused by the fact that the temperature of the off-site fresh air is too low can be avoided. The third air valve 2C on the exhaust duct of the equipment room C is opened, part of exhaust air of the equipment room C enters the air conditioning unit D through the third air valve 2C, and the redundant exhaust air is discharged through the fourth air valve 2D and enters the exhaust duct.
For office B, the indoor heating value is relatively small, so that the requirements of indoor personnel health and thermal comfort are met. The off-site fresh air with high temperature and high humidity in summer passes through the pressureless tail water tunnel at first, and is subjected to heat-humidity exchange with tail water with lower temperature, after cooling and dehumidification, induced air passes through the first air valve 2a to adjust air quantity, enters the air conditioning unit D, is deeply dehumidified and cooled by the direct expansion type evaporator 5 in the air conditioning unit D at first, and is sent into the office B under the action of the air feeder 7 after being subjected to temperature adjustment to an air supply state point by the first condenser 6, so that the office B is dehumidified. The exhaust air of office B enters the exhaust duct and is exhausted together with the exhaust air of equipment C by the exhaust fan 23. Meanwhile, tail water enters the indoor tail end 21 of the office B under the action of the water pump 19, and indoor sensible heat is eliminated. In the transitional season, when the indoor residual heat is small, the circulating water pump 19 may be turned off according to circumstances. Therefore, the embodiment of the application adopts a mode of independent temperature and humidity control in cold supply seasons, fully utilizes tail water and a natural cold source of induced draft of a pressureless tail water tunnel to treat residual heat and residual humidity of a personnel office area by combining a dehumidification temperature-regulating air treatment system, fully utilizes the natural cold source of a hydropower station to perform heat and humidity treatment, and solves the problems of large air quantity, high energy consumption of a fan, large occupied area of an air conditioning system and high investment of the traditional all-air system. The off-site fresh air with lower temperature in winter firstly carries out heat-moisture exchange with tail water with relatively higher temperature through a pressureless tail water hole, induced air with increased temperature enters an air conditioning unit D through a first air valve 2a, at the moment, a compressor of the vapor compression temperature-regulating dehumidifier unit is closed, and vapor compression temperature-regulating dehumidifier cycle does not run; meanwhile, a third air valve 2C on an exhaust duct of the equipment room C is opened, exhaust air of the equipment room C enters an air conditioning unit D through the third air valve 2C and is mixed with induced air preheated by tail water in the air conditioning unit D to a blowing state point, and then the mixed air is sent into an office B by a blower 7 to supply heat to the room, the opening of the third air valve 2C and the opening of a fourth air valve 2D are adjusted according to the temperature of the office B, and at the moment, a water pump 19 does not operate. Therefore, the hydropower station temperature-regulating dehumidification air-conditioning system provided by the embodiment of the application can fully utilize the heat exhausted between high-heating-value equipment to supply heat to an office room, and the heat supply energy consumption is saved.
According to the hydropower station temperature-regulating dehumidifying air-conditioning system provided by the embodiment of the application, the heat and humidity load characteristics of the high-heating-capacity equipment room of the hydropower station and the office of the personnel activity area are combined, the heat in the natural cold source and the exhaust air is fully utilized to respectively construct an efficient air-conditioning system, the natural cold source can be fully utilized to cool the high-heating-capacity equipment room throughout the year, the exhaust heat of the high-heating-capacity equipment room can be recovered, and the air-conditioning system of the office of the personnel activity area with high operation efficiency and excellent regulation performance is constructed; adopting a pressureless tail water tunnel to cool and dehumidify fresh air outside the station, and dehumidifying and reheating induced air; the embodiment of the application adopts an independent fresh air system to combine with a temperature and humidity independent control air conditioning system for cooling the tail water indoor tail end, so that the problems of large occupied space, high initial investment and high operation energy consumption of an all-air system are solved; the off-site fresh air pretreated by the pressureless tail water tunnel and the high-temperature exhaust air between the high-heating-value equipment are mixed to the air supply parameters in winter, and the air is directly sent into an office area, so that a low-energy system is constructed, and the system has the advantages of improving the air quality and heating efficiently.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present application without undue burden.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (5)
1. A hydroelectric power station tempering and dehumidifying air-conditioning system, comprising: a temperature-regulating and dehumidifying air treatment module; the temperature-adjusting and dehumidifying air treatment module comprises an air conditioning unit and a vapor compression temperature-adjusting and dehumidifying unit; the air conditioning unit comprises a box body provided with a fresh air inlet and a hot air inlet, and an evaporator, a first condenser and a blower which are arranged in the box body and are sequentially arranged along the air flowing direction; the vapor compression temperature-regulating dehumidifier unit comprises an electric three-way valve, a throttle valve, a second condenser and a compressor;
the outlet end of the evaporator is connected with the inlet end of the compressor, the outlet end of the compressor is respectively connected with the inlet end of the first condenser and the first inlet end of the second condenser, the outlet end of the first condenser is connected with the first end of the electric three-way valve, the first outlet end of the second condenser is connected with the second end of the electric three-way valve, and the third end of the electric three-way valve is connected with the inlet end of the evaporator through the throttle valve;
the air outlet of the air feeder is connected with the air outlet of the office, and the air outlet of the pressureless tail water hole is respectively connected with the new air outlet and the air outlet of the equipment room; an indoor tail end is arranged in the office, and a water circulation module is arranged between tail water of the pressureless tail water tunnel and the indoor tail end; the air outlet of the equipment room is respectively connected with the hot air inlet and the air outlet of the office room;
the second outlet end of the second condenser is connected with the water outlet channel of the water circulation module, and the second inlet end of the second condenser is connected with the water inlet channel of the water circulation module; or the second inlet end of the second condenser is connected with the air outlet of the office and/or the air outlet of the equipment room.
2. The hydroelectric power tempering and dehumidifying air-conditioning system of claim 1, wherein the indoor end is a fan coil and/or a radiant end.
3. A method of operating a hydroelectric power-station attemperation dehumidification air-conditioning system as claimed in any one of claims 1 to 2, comprising:
the induced draft of the tail-free water tunnel is conveyed to the equipment room, so that the ventilation and cooling of the equipment room are realized all the year round;
in summer, an air conditioning unit and a vapor compression temperature-regulating dehumidifier unit are started, induced draft of the pressureless tail water tunnel is conveyed to a fresh air port, and fresh air after temperature regulation and dehumidification is conveyed to an air supply port of an office through an air outlet of an air feeder; starting a water circulation module to enable tail water of the pressureless tail water hole to circulate and flow between the indoor tail end and the pressureless tail water hole, and removing indoor sensible heat;
in winter, the air conditioning unit is started and the vapor compression temperature-regulating dehumidifier unit is closed, exhaust air with higher temperature between devices is conveyed to a hot air inlet of the air conditioning unit through an air outlet of the device, induced air of the pressureless tail water hole is conveyed to the fresh air inlet, and after the hot air is mixed with the fresh air, the mixture is conveyed to an air supply outlet of the office through an air outlet of the air feeder.
4. A method of operation as claimed in claim 3, further comprising:
and tail water of the pressureless tail water hole is conveyed to the second inlet end of the second condenser through the water inlet channel of the water circulation module, and heated tail water is conveyed to the water outlet channel of the water circulation module through the second outlet end of the second condenser.
5. A method of operation as claimed in claim 3, further comprising:
the air source is conveyed to the second inlet end of the second condenser through an air outlet of the equipment room and/or an air outlet of the office room, and the heated air source is discharged through the second outlet end of the second condenser.
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| CN201910745052.4A CN110440355B (en) | 2019-08-13 | 2019-08-13 | Hydropower station temperature-regulating dehumidifying air-conditioning system and operation method thereof |
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| CN112503651B (en) * | 2020-12-07 | 2022-08-05 | 广东申菱环境系统股份有限公司 | Fresh air dehumidifying and drying system for hydropower station gallery and control method thereof |
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