CN102777990B - Air conditioning unit system of water source heat pump in reservoir for underground hydropower station - Google Patents
Air conditioning unit system of water source heat pump in reservoir for underground hydropower station Download PDFInfo
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Abstract
The invention discloses an air conditioning unit system of a water source heat pump in a reservoir applicable to an underground hydropower station. The air conditioning unit system comprises a water intake system, a direct cold-supplying system, a heat-pump cold-heat supplying system and an air treatment system, wherein the water intake system consists of a water intake head, a water intake pipe, a cleaner and a water intake pump; the direct cold-supplying system consists of a first electric adjusting valve, a first surface cooler, a second electric adjusting valve and pipelines connected between the water intake system and the parts; the heat-pump cold-heat supplying system consists of a first heat exchanger, a compressor, a four-way valve, a second heat exchanger, a chilled water circulating pump, a second surface cooler, a first expansion valve, a first one-way valve, a second expansion valve, a second one-way valve, a third electric adjusting valve, a fourth electric valve and pipelines connected among the parts; and the air treatment system consists of the first surface cooler, the second surface cooler and a rotary-wheel dehumidifying mechanism. The air conditioning unit system disclosed by the invention has the advantages that good operation of various functions such as cooling, heating and dehumidifying of cavern groups of the underground hydropower station in the whole year can be ensured, and a great amount of energy is saved in the transition season.
Description
Technical field
The present invention relates to a kind of surface water source heat pump central air-conditioning unit, particularly the reservoir Water source heat pump unit system of a kind of underground power station cavern thermal and humidity environment regulation and control, is specially adapted to Underground Excavation Cluster of Hydropower Station working environment.
Background technology
Power station has that installed capacity is large, unit number of units is many, electrical equipment is many and caloric value is large, underground chamber passes the feature such as remarkable that wets, so annual most of time need carry out cooling and dehumidifying to cavity group room air, has caused thus very large energy resource consumption.
Utilizing surface water (river, lake water, seawater) or underground water from condenser, to take condensation heat extraction as cooling water away, is the Refrigeration Technique of an energy-saving low-carbon.Surface water source heat pump working principle of said set figure at present used as shown in Figures 1 and 2.The fundamental diagram of system that wherein Fig. 1 provides while being cooling condition, the fundamental diagram of system that Fig. 2 provides while being heating condition.During refrigeration, refrigeration working medium through compressor compression, enter condenser heat release, the liberated heat water (surface water) that is cooled is taken away, then by electric expansion valve adiabatic expansion, the cryogenic fluid producing directly enters evaporimeter and produces cold water (sending into user freezes), is sucked and compresses again thereafter by compressor, so moves in circles.While heating, compressed refrigeration working medium, enter condenser heat release and produce high-temperature-hot-water (send into user and carry out heat supply), then by electric expansion valve adiabatic expansion, the cryogenic fluid producing directly enters evaporimeter and draws the heat in surface water, thereafter working medium is sucked and compresses by compressor again, so moves in circles.
Chinese patent application (application number is 200610102097.2) discloses the efficient water source heat pump units of a kind of applicable river, river, lake, extra large low water temperature, its temperature according to input water source is determined evaporating temperature and the condensation temperature of suitable first order water resource heat pump, for second level water resource heat pump provides suitable water source input temp, thereby solved the operating efficiency problem of water source heat pump units under the low-temperature water source lower than 2 ℃.
Chinese patent application (application is 201110033862.0) discloses a kind of seawater source water ring heat pump device for air-conditioning system, this device carries out the exchange heat between heat transferring medium and seawater by a seawater plate type heat exchanger, avoided seawater to enter water-water heat pump unit, solution be the problem of seawater to water source heat pump units equipment corrosion.
Chinese patent application (application number is 03112165.9) discloses a kind of source pump of utilizing source of seawater, and during its work, seawater is walked tube side, and working medium is walked shell side.The part of seawater process can facilitate the feasible preservative treatment of carrying out, and has avoided being difficult for antiseptic shell side, the Anticorrosion that remains seawater thermal source of solution.
Have not yet to see the surface water source heat pump unit regulating and controlling for underground power station ambient temperature and humidity specially.In fact, the regulation and control of underground power station humiture environment have its particularity, are mainly manifested in following aspect: the one, and it often still needs refrigeration to eliminate the waste heat of the equipment generations such as generating set and remaining the wetting that wall distributes at transition season; The 2nd, around having huge water source (reservoir water) can be used as Cooling and Heat Source in power station; The 3rd, reservoir water is when the certain water depth of transition season, and water temperature is 11 ℃ of left and right (if Fig. 3 is the annual water temperature curve map of certain underground Hydropower Plant Reservoir water different depth), and this is comparatively suitable free cold supply water temperature; The 4th, underground hole group position is lower, and water intaking pump energy consumption is lower, and the economy of free cold supply is higher.But it during the broiling summer, because load strengthens, water temperature uprises, and free cold supply is not suitable for, and when cold winter, also needs heat supply simultaneously.And during free cold supply, because water temperature does not reach the required dew-point temperature of dehumidifying, dehumidifying is existing problems also.
Summary of the invention
The defect or the deficiency that for above-mentioned background technology, exist, the object of the invention is to, and a kind of reservoir water source heat pump air conditioner system of underground power station is provided.
In order to realize above-mentioned task, the present invention adopts following technical solution to be achieved:
A reservoir water source heat pump air-conditioner unit for underground power station, is characterized in that, by water intake system, direct cold supply system, heat pump cold and heat supply system and air treatment system, formed, wherein:
Water intake system comprises water pump, the dirt separator that pump house is installed, intake pipe and water intake, wherein, water pump one end is connected with the node pipeline of the 3rd electric control valve parallel connection with the first electric control valve, the water pump other end connects dirt separator by pipeline, dirt separator connects water intake by intake pipe, and water intake is placed under reservoir lowest water level;
Directly cold supply system comprises the first electric control valve, the first surface cooler, the second electric control valve and the pipeline being connected with water intake system thereof, wherein, one end of the first electric control valve is connected with water intake system, the other end is connected with the first surface cooler, the other end of the first surface cooler is connected with the second electric control valve, and the other end of the second electric control valve is connected on water return pipeline;
Heat pump cold and heat supply system comprises First Heat Exchanger, compressor, cross valve, the second heat exchanger, chilled water water circulating pump, the second surface cooler, the first expansion valve (14), the first check valve, the second expansion valve, the second check valve, the 3rd electric control valve, the 4th electric control valve and interconnective pipeline thereof, wherein, one end of the 3rd electric control valve is connected on the pipeline that connects the first electric control valve and water pump outlet by pipeline, and the other end is connected on First Heat Exchanger by pipeline; The two ends of the 4th electric control valve are connected on First Heat Exchanger and return pipe by pipeline respectively; First Heat Exchanger, the second heat exchanger are connected by pipeline with the two ends of cross valve respectively, and the two ends of compressor are connected by pipeline with the other two ends of cross valve; First Heat Exchanger and the second heat exchanger are directly by pipeline connect the first expansion valve and the second expansion valve; The first check valve is in parallel with the first expansion valve, and the second check valve is in parallel with the second expansion valve; The second heat exchanger is connected and is formed loop by pipeline with the second surface cooler, chilled water circulating pump;
Air treatment system comprises air cleaner, the first surface cooler, the second surface cooler and rotary dehumidifier, wherein, the first surface cooler and the second surface cooler is installed successively after air cleaner, after rotary dehumidifier is positioned at the second surface cooler.
The reservoir water source heat pump air conditioner system of underground power station of the present invention, can guarantee underground power station cavity group the annual period meet freeze, heat, the good operation of the various functions such as dehumidifying, and at transition season saving mass energy.
Accompanying drawing explanation
The fundamental diagram of system when Fig. 1 is traditional cooling condition.
The fundamental diagram of system when Fig. 2 is traditional heating condition.
The annual water temperature curve map of the underground Hydropower Plant Reservoir water of Fig. 3 different depth.
Fig. 4 is the reservoir water source heat pump air conditioner system architecture principle schematic of underground power station of the present invention.
Below in conjunction with accompanying drawing, particular content of the present invention is described in further detail.
The specific embodiment
Referring to Fig. 4, the present embodiment provides a kind of reservoir water source heat pump air conditioner system of underground power station, comprises following four parts:
The water intake system being formed by water intake 1, intake pipe 2, dirt separator 3, water pump 4; Wherein, water pump 4 one end are connected by pipeline with the node of the 3rd electric control valve 5 parallel pipelines with the first electric control valve 6, water pump 4 other ends are connected by pipeline with dirt separator 3, and dirt separator 3 is connected by intake pipe 2 with water intake 1, and water intake 1 is placed under reservoir lowest water level.
By the first electric control valve 6, the first surface cooler 7, the second electric control valve 10 and between the direct cold supply system that forms of the pipeline that connects; Wherein, one end of the first electric control valve 6 is connected with water intake system, and the other end is connected with the first surface cooler 7, and the other end of the first surface cooler 7 is connected with the second electric control valve 10, and the other end of the second electric control valve 10 is connected on water return pipeline.
The heat pump cold and heat supply system being formed by First Heat Exchanger 18, compressor 19, cross valve 20, the second heat exchanger 13, chilled water water circulating pump 12, the second surface cooler 8, the first expansion valve 14, the first check valve 15, the second expansion valve 17, the second check valve 16, the 3rd electric control valve 5, the 4th electric control valve 11 and interconnective pipeline thereof;
Wherein, one end of the 3rd electric control valve 5 is connected on the pipeline that connects the first electric control valve 6 and water pump 4 outlets by pipeline, the other end is connected on First Heat Exchanger 18 by pipeline, and the two ends of the 4th electric control valve 11 are connected on First Heat Exchanger 18 and return pipe by pipeline respectively; First Heat Exchanger 18, the second heat exchanger 13 are connected by pipeline with the two ends of cross valve 20 respectively, and the two ends of compressor 19 are connected by pipeline with the other two ends of cross valve 20; First Heat Exchanger 18 and the second heat exchanger 13 are directly by pipeline connect the first expansion valve 14 and the second expansion valve 17; The first check valve 15 is in parallel with the first expansion valve 14, and the second check valve 16 is in parallel with the second expansion valve 17; The second heat exchanger 13 is connected and is formed loop by pipeline with the second surface cooler 8, chilled water circulating pump 12.
The air treatment system being formed by air cleaner, the first surface cooler 7, the second surface cooler 8, rotary dehumidifier 9.Wherein, the first surface cooler 7 and the second surface cooler 8 are installed successively after air cleaner, after rotary dehumidifier 9 is positioned at the second surface cooler 8.
The reservoir water source heat pump air conditioner System Working Principle of the underground power station of the present embodiment is:
During transition season operating mode, close the 3rd electric control valve 5 and the 4th electric control valve 11, open the first electric control valve 6 and the second electric control valve 10, close compressor 19 and chilled water circulating pump 12, now heat pump cold and heat supply system is in the state of quitting work.The reservoir water of 11 ℃ is by the effect of water intake system water pump 4, flow into water intake 1, through intake pipe 2, flow in dirt separator 3 and carry out scrubbing again, reservoir water after scrubbing is absorbed heat through first electric control valve 6 inflow the first surface coolers of open mode, then the reservoir water after heat absorption flows into return pipe through the second electric control valve 10 of open mode again, finally enters in reservoir.The mixing air of new wind and return air is at the cooling effect borehole cooling of the first surface cooler 7, but due to the dew-point temperature of cooling effect higher than humid air, can not reach the object of dehumidifying, now need to open 9 pairs of the rotary dehumidifiers air through cooling and dehumidify, finally by air supply duct, will send into underground hole group through cooling and the low temperature dry air of dehumidifying.So constantly circulation, to eliminate waste heat and remaining the wetting of cavity group.
During summer condition, close the first electric control valve 6 and the second electric control valve 10, open the 3rd electric control valve 5, the 4th electric control valve 11, compressor 19 and chilled water circulating pump 12.Reservoir water is by the effect of water intake system water pump 4, flow into water intake 1, through intake pipe 2, flow in dirt separator 3 and carry out scrubbing again, reservoir water after scrubbing is through the 3rd electric control valve 5 of open mode, take away the condensation heat that First Heat Exchanger 18 produces, and flow into return pipe by the 4th electric control valve 11, thereby enter in reservoir.And the refrigeration working medium compressing through compressor 19, through cross valve 20, enter First Heat Exchanger 18 heat releases, the reservoir water that liberated heat is recycled is taken away, then by the first expansion valve 14 adiabatic expansions, the cryogenic fluid of generation directly enters the second heat exchanger 13 and produces chilled water, and chilled water is through chilled water water circulating pump 12, send into the second surface cooler 8 and freeze, refrigeration working medium is sucked and compresses by compressor 19.Now can stop rotary dehumidifier 9, only have the second surface cooler 8 to carry out cool-down dehumidification, through the low temperature dry air of the second surface cooler cool-down dehumidification, finally by air supply duct, send into underground hole group.So constantly circulation, to eliminate waste heat and remaining the wetting of cavity group.
During winter condition, close the first electric control valve 6 and the second electric control valve 10, open the 3rd electric control valve 5, the 4th electric control valve 11, compressor 19 and chilled water circulating pump 12.Reservoir water is by the effect of water intake system water pump 4, flow into water intake 1, through intake pipe 2, flow in dirt separator 3 and carry out scrubbing again, reservoir water after scrubbing is through the 3rd electric control valve 5 of open mode, enter First Heat Exchanger 18 by refrigeration working medium heat absorption wherein after, by the 4th electric control valve 11, flow into return pipe, thereby enter in reservoir.And the refrigeration working medium compressing through compressor 19, through cross valve 20, enter the second heat exchanger 13 heat releases, liberated heat is produced high-temperature-hot-water, high-temperature-hot-water, through chilled water water circulating pump 12, is sent into the second surface cooler 8 and is heated, and refrigeration working medium is by the second expansion valve 17 adiabatic expansions, enter and in First Heat Exchanger 18, draw the heat in circulation reservoir water, then sucked and compress by compressor 19.Now stop rotary dehumidifier 9, do not dehumidify.Air through the second surface cooler 8 heating is finally sent into underground hole group by air supply duct.So constantly circulation, to carry out heat supply to cavity group.
Embodiment:
The present embodiment has simply calculated and has adopted the reservoir water source heat pump air conditioner system of the underground power station of the present embodiment to compare with traditional surface water source heat pump, is applied to the energy-saving effect that a Large Underground power station transition season refrigeration host computer produces.This power station accounting temperature and refrigeration duty summarized results are as shown in table 1.
Table 1 refrigeration duty gathers
Scheme one: for adopting conventional piston formula refrigeration unit cooling, its unit performance coefficient COP=4.2.According to unit performance Coefficient Definition
In formula, Q: the refrigerating capacity of unit, kW;
P: the power that unit consumes, kW.
The power consumption that can try to achieve refrigeration host computer under declared working condition is 422.22kW.
Scheme two adopts the present invention to carry out free cold supply to this power station transition season, now only have the power consumption of water intaking water pump, and pump energy consumption can be calculated as follows:
In formula, N: the shaft power of water pump, kW;
ρ: the density of water, 1000kg/m
3;
G: the flow of water, m
3/ h;
H: water pump lift, the engineering water intaking discrepancy in elevation of the present embodiment is 40m, considers on-way resistance and local resistance, selected water intaking pump head is 70m;
η: the efficiency of water pump, generally get 0.5-0.8, this calculating gets 0.7.
Wherein the flow of water can calculate with following formula:
Q in formula: refrigeration duty, kW;
C: the specific heat at constant pressure of water, 4.187kJ/(Kg ℃);
T
1: return water temperature, get 16 ℃;
T
2: supply water temperature, get 11 ℃.
By above-mentioned formula, can be calculated and be adopted when of the present invention, energy consumption for cooling is 298.9kW.Compare with adopting conventional piston formula refrigeration unit cooling as seen, adopt this system to can save energy approximately 29.2% at transition season.
Claims (1)
1. a reservoir water source heat pump air conditioner system for underground power station, is characterized in that, by water intake system, direct cold supply system, heat pump cold and heat supply system and air treatment system, formed, wherein:
Water intake system comprises water pump (4), the dirt separator (3) that pump house is installed, intake pipe (2) and water intake (1), wherein, water pump (4) one end node pipeline in parallel with the 3rd electric control valve (5) with the first electric control valve (6) is connected, water pump (4) other end connects dirt separator (3) by pipeline, dirt separator (3) connects water intake (1) by intake pipe (2), and water intake (1) is placed under reservoir lowest water level;
Directly cold supply system comprises the first electric control valve (6), the first surface cooler (7), the second electric control valve (10) and the pipeline being connected with water intake system thereof, wherein, one end of the first electric control valve (6) is connected with water intake system, the other end is connected with the first surface cooler (7), the other end of the first surface cooler (7) is connected with the second electric control valve (10), and the other end of the second electric control valve (10) is connected on water return pipeline;
Heat pump cold and heat supply system comprises First Heat Exchanger (18), compressor (19), cross valve (20), the second heat exchanger (13), chilled water water circulating pump (12), the second surface cooler (8), the first expansion valve (14), the first check valve (15), the second expansion valve (17), the second check valve (16), the 3rd electric control valve (5), the 4th electric control valve (11) and interconnective pipeline thereof, wherein, one end of the 3rd electric control valve (5) is connected on the pipeline that connects the first electric control valve (6) and water pump (4) outlet by pipeline, the other end is connected on First Heat Exchanger (18) by pipeline, the two ends of the 4th electric control valve (11) are connected on First Heat Exchanger (18) and return pipe by pipeline respectively, First Heat Exchanger (18), the second heat exchanger (13) are connected by pipeline with the two ends of cross valve (20) respectively, and the two ends of compressor (19) are connected by pipeline with the other two ends of cross valve (20), First Heat Exchanger (18) and the second heat exchanger (13) are directly by pipeline connect the first expansion valve (14) and the second expansion valve (17), the first check valve (15) is in parallel with the first expansion valve (14), and the second check valve (16) is in parallel with the second expansion valve (17), the second heat exchanger (13) is connected and is formed loop by pipeline with the second surface cooler (8), chilled water water circulating pump (12),
Air treatment system comprises air cleaner, the first surface cooler (7), the second surface cooler (8) and rotary dehumidifier (9), wherein, the first surface cooler (7) and the second surface cooler (8) are installed successively after air cleaner, and rotary dehumidifier (9) is positioned at the second surface cooler (8) afterwards.
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| CN103075764B (en) * | 2013-01-15 | 2015-05-27 | 广东省建筑科学研究院集团股份有限公司 | Double-cold source dehumidification air-conditioning unit |
| CN103383125B (en) * | 2013-07-05 | 2015-07-22 | 燕山大学 | Underground water source radiation plate type air conditioning system |
| CN104374020B (en) * | 2013-08-16 | 2017-10-13 | 中国建筑科学研究院 | Water source heat pump air conditioning system |
| CN107166479B (en) * | 2017-05-26 | 2018-07-06 | 烟台卓越新能源科技股份有限公司 | Nuclear power station residual neat recovering system |
| CN107036215B (en) * | 2017-06-07 | 2020-05-15 | 山东一村空调有限公司 | Intelligent dual-energy double-effect air conditioner |
| CN110220329A (en) * | 2019-06-18 | 2019-09-10 | 福建省建筑设计研究院有限公司 | The direct-cooled coupling deep well water source heat pump system of phreatic water |
| CN110469935A (en) * | 2019-07-05 | 2019-11-19 | 常州大学 | A kind of light, water, the fresh air system being electrically coupled |
| CN114034115B (en) * | 2021-11-19 | 2023-04-28 | 五凌电力有限公司五强溪水电厂 | Dehumidifier control method and system based on hydropower station underground plant |
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