CN118602504A - Phase-change cold storage air conditioning system for subway stations and control method thereof - Google Patents
Phase-change cold storage air conditioning system for subway stations and control method thereof Download PDFInfo
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 229
- 238000001816 cooling Methods 0.000 claims abstract description 123
- 230000001105 regulatory effect Effects 0.000 claims abstract description 72
- 230000005611 electricity Effects 0.000 claims abstract description 50
- 239000000498 cooling water Substances 0.000 claims abstract description 41
- 238000012544 monitoring process Methods 0.000 claims description 46
- 238000005057 refrigeration Methods 0.000 claims description 34
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- 239000012782 phase change material Substances 0.000 claims description 7
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- 238000009423 ventilation Methods 0.000 description 3
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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
- F24F5/0017—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 using cold storage bodies, e.g. ice
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
本发明提供了一种地铁车站相变蓄冷空调系统及其控制方法,所述系统包括构成供冷机组的集水器、冷冻水泵、冷水机组、第一电动开关阀V1、第一电动调节阀VT1、分水器、冷却水泵、第二电动开关阀V2、第三电动开关阀V3、第四电动开关阀V4和冷却塔,该系统还包括构成蓄冷机组的第二电动双向调节阀VT2、电动双向开关阀V5、电动双向开关阀V6和相变蓄冷箱。相较于现有技术,基于本发明方法使系统夜间低谷电价蓄冷,白天电价高峰时释冷,从而实现地铁车站空调用电的移峰填谷,提高经济效益。
The present invention provides a phase-change cold storage air conditioning system for a subway station and a control method thereof, wherein the system comprises a water collector, a chilled water pump, a chiller, a first electric switch valve V1, a first electric regulating valve VT1, a water distributor, a cooling water pump, a second electric switch valve V2, a third electric switch valve V3, a fourth electric switch valve V4 and a cooling tower constituting a cold storage unit, and the system further comprises a second electric two-way regulating valve VT2, an electric two-way switch valve V5, an electric two-way switch valve V6 and a phase-change cold storage box constituting a cold storage unit. Compared with the prior art, the method of the present invention enables the system to store cold at low electricity prices at night and release cold at peak electricity prices during the day, thereby realizing peak shifting and valley filling of electricity consumption of air conditioners in subway stations and improving economic benefits.
Description
技术领域Technical Field
本发明属于地铁车站蓄冷技术领域,具体涉及一种地铁车站相变蓄冷空调系统及其控制方法。The present invention belongs to the technical field of subway station cold storage, and in particular relates to a subway station phase change cold storage air conditioning system and a control method thereof.
背景技术Background Art
通风空调系统作为地铁车站用于调节站内温度的重要组成部分,其运行能耗占地铁车站能源消耗总量的30%-40%,其对应的运营成本极高。在地铁运营时段6:30-23:00,通风空调系统的电负荷极大,而在深夜通风空调系统的电负荷会大幅降低,两个时间段的电负荷差异极大,存在能量供给、需求时间和负荷强度不匹配的问题。The ventilation and air conditioning system is an important component of the subway station for regulating the temperature inside the station. Its operating energy consumption accounts for 30%-40% of the total energy consumption of the subway station, and its corresponding operating cost is extremely high. During the subway operation period from 6:30 to 23:00, the power load of the ventilation and air conditioning system is extremely large, while the power load of the ventilation and air conditioning system will be greatly reduced in the middle of the night. The power load difference between the two time periods is very large, and there is a problem of mismatch between energy supply, demand time and load intensity.
为了解决上述问题,现有技术中提出了一种蓄冷技术,以实现“移峰填谷”。现有的蓄冷技术虽然实现了“移峰填谷”,但是受限于其结构特征与控制方法,一般仅具有单一的供冷或蓄冷功能,供冷机组与蓄冷机组的联动能力较差,经济效益较低。In order to solve the above problems, a cold storage technology is proposed in the prior art to achieve "peak shifting and valley filling". Although the existing cold storage technology achieves "peak shifting and valley filling", it is limited by its structural characteristics and control methods. It generally only has a single cooling or cold storage function, and the linkage ability between the cooling unit and the cold storage unit is poor, and the economic benefits are low.
发明内容Summary of the invention
本发明提供了一种地铁车站相变蓄冷空调系统及其控制方法,用于解决现有技术中存在的问题。The invention provides a phase-change cold storage air-conditioning system for a subway station and a control method thereof, which are used to solve the problems existing in the prior art.
第一方面,为了实现上述目的,本发明提供一种地铁车站相变蓄冷空调系统,内置有用于控制阀体的控制监控终端,本发明系统包括若干冷水机组、若干冷冻水泵、若干冷却塔、若干冷却水泵、集水器、分水器、相变蓄冷箱、第一电动开关阀V1、第二电动开关阀V2、第三电动开关阀V3、第四电动开关阀V4、电动双向开关阀V5、电动双向开关阀V6、第一电动调节阀VT1和第二电动双向调节阀VT2;In the first aspect, in order to achieve the above-mentioned purpose, the present invention provides a phase-change cold storage air conditioning system for a subway station, which is equipped with a control monitoring terminal for controlling a valve body. The system of the present invention includes a plurality of chillers, a plurality of chilled water pumps, a plurality of cooling towers, a plurality of cooling water pumps, a water collector, a water distributor, a phase-change cold storage tank, a first electric switch valve V1, a second electric switch valve V2, a third electric switch valve V3, a fourth electric switch valve V4, an electric two-way switch valve V5, an electric two-way switch valve V6, a first electric regulating valve VT1, and a second electric two-way regulating valve VT2;
其中,集水器入水口连通空调机组的冷冻水回水端;冷冻水泵的入水口连通集水器的出水口;冷水机组包括蒸发器和冷凝器,蒸发器的入口连通冷冻水泵的出水口;第一电动开关阀V1的入水口连通蒸发器的出口;第一电动调节阀VT1的入水口连通第一电动开关阀V1的出水口;分水器的入水口连通第一电动调节阀VT1的出水口,分水器用于向空调机组供水;冷却水泵的出水口连通冷凝器的入口;第二电动开关阀V2的入水口连通冷凝器的出口;第三电动开关阀V3的入水口连通第二电动开关阀V2的出水口;第四电动开关阀V4的出水口连通冷却水泵的入水口;冷却塔的入水口连通第三电动开关阀V3的出水口,冷却塔的出水口连通第四电动开关阀V4的入水口;相变蓄冷箱包括第一出入口和第二出入口;第一出入口通过第二电动双向调节阀VT2连通第一电动开关阀V1和第一电动调节阀VT1的连通管道;第二出入口通过电动双向开关阀V5连通冷冻水泵的出水口;第二出入口通过电动双向开关阀V6连通冷冻水泵的入水口。Among them, the water inlet of the water collector is connected to the chilled water return end of the air-conditioning unit; the water inlet of the chilled water pump is connected to the water outlet of the water collector; the chiller includes an evaporator and a condenser, and the inlet of the evaporator is connected to the outlet of the chilled water pump; the water inlet of the first electric switch valve V1 is connected to the outlet of the evaporator; the water inlet of the first electric regulating valve VT1 is connected to the outlet of the first electric switch valve V1; the water inlet of the water distributor is connected to the outlet of the first electric regulating valve VT1, and the water distributor is used to supply water to the air-conditioning unit; the outlet of the cooling water pump is connected to the inlet of the condenser; the water inlet of the second electric switch valve V2 is connected to the outlet of the condenser; the third electric switch valve V3 The water inlet is connected to the water outlet of the second electric switch valve V2; the water outlet of the fourth electric switch valve V4 is connected to the water inlet of the cooling water pump; the water inlet of the cooling tower is connected to the water outlet of the third electric switch valve V3, and the water outlet of the cooling tower is connected to the water inlet of the fourth electric switch valve V4; the phase change cold storage box includes a first inlet and a second inlet and a second inlet; the first inlet and a second inlet are connected to the connecting pipe of the first electric switch valve V1 and the first electric regulating valve VT1 through the second electric two-way regulating valve VT2; the second inlet and a second inlet are connected to the water outlet of the chilled water pump through the electric two-way switch valve V5; the second inlet and a second inlet are connected to the water inlet of the chilled water pump through the electric two-way switch valve V6.
通过上述技术方案,上述集水器、冷冻水泵、冷水机组、第一电动开关阀V1、第一电动调节阀VT1、分水器、冷却水泵、第二电动开关阀V2、第三电动开关阀V3、第四电动开关阀V4和冷却塔的连接关系构成起到主要的制冷功能,而第二电动双向调节阀VT2、电动双向开关阀V5、电动双向开关阀V6和相变蓄冷箱的连接关系兼具蓄冷和供冷功能,控制监控终端可以灵活调节对应阀体的工作状态,使整个系统夜间低谷电价蓄冷,白天电价高峰时释冷,从而实现地铁车站空调用电的移峰填谷,提高经济效益。Through the above technical scheme, the connection relationship between the water collector, the chilled water pump, the chiller, the first electric switch valve V1, the first electric regulating valve VT1, the water distributor, the cooling water pump, the second electric switch valve V2, the third electric switch valve V3, the fourth electric switch valve V4 and the cooling tower plays the main refrigeration function, while the connection relationship between the second electric two-way regulating valve VT2, the electric two-way switch valve V5, the electric two-way switch valve V6 and the phase change cold storage box has both cold storage and cold supply functions. The control and monitoring terminal can flexibly adjust the working state of the corresponding valve body, so that the entire system can store cold at low electricity prices at night and release cold at peak electricity prices during the day, thereby realizing the peak shifting and valley filling of air-conditioning electricity consumption in subway stations and improving economic benefits.
优选的,冷水机组、冷冻水泵、冷却塔和冷却水泵在数量上一一对应。Preferably, the chillers, chilled water pumps, cooling towers and cooling water pumps correspond one to one in number.
优选的,若冷水机组、冷冻水泵、冷却塔和冷却水泵的数量大于一,多个冷水机组连同对应第一电动开关阀V1的所在管路并联,多个冷水机组连同对应第二电动开关阀V2的所在管路并联,多个冷冻水泵的管路并联,多个冷却塔连同对应第三电动开关阀V3的所在管路并联,多个冷却塔连同对应第四电动开关阀V4的所在管路并联;冷水机组、冷冻水泵、冷却塔和冷却水泵的开启和关闭台数一一对应。Preferably, if the number of chillers, refrigerated water pumps, cooling towers and cooling water pumps is greater than one, multiple chillers are connected in parallel with the pipeline corresponding to the first electric switch valve V1, multiple chillers are connected in parallel with the pipeline corresponding to the second electric switch valve V2, multiple refrigerated water pumps are connected in parallel, multiple cooling towers are connected in parallel with the pipeline corresponding to the third electric switch valve V3, and multiple cooling towers are connected in parallel with the pipeline corresponding to the fourth electric switch valve V4; the number of chillers, refrigerated water pumps, cooling towers and cooling water pumps that are opened and closed corresponds one to one.
优选的,相变蓄冷箱内置有多个相变蓄冷模块;多个相变蓄冷模块相互平行且间隔分布。Preferably, the phase change cold storage box has multiple phase change cold storage modules built in; the multiple phase change cold storage modules are parallel to each other and distributed at intervals.
优选的,相变蓄冷箱的外壳采用金属壳体或塑料壳体;相变蓄冷箱外侧四周设置有离心玻璃棉。Preferably, the shell of the phase-change cold storage box is a metal shell or a plastic shell; centrifugal glass wool is arranged around the outer side of the phase-change cold storage box.
优选的,相变蓄冷模块包括相变层和支撑层,相变层镶嵌于支撑层内,相变层采用无机水合盐、石蜡或有机-无机复合相变材料制成,支撑层采用金属板或塑料壳体;相变层的相变温度为8℃-10℃。Preferably, the phase change cold storage module includes a phase change layer and a support layer. The phase change layer is embedded in the support layer. The phase change layer is made of inorganic hydrated salt, paraffin or organic-inorganic composite phase change material, and the support layer is made of metal plate or plastic shell; the phase change temperature of the phase change layer is 8°C-10°C.
优选的,还包括流量传感器P,流量传感器P设置于相变蓄冷箱和第二电动双向调节阀VT2的连通管路之间,流量传感器P通信连接于控制监控终端。Preferably, a flow sensor P is also included, and the flow sensor P is arranged between the phase change cold storage box and the connecting pipeline of the second electric two-way regulating valve VT2, and the flow sensor P is communicatively connected to the control and monitoring terminal.
优选的,还包括通信连接于控制监控终端的第一温度传感器T1、第二温度传感器T2、第三温度传感器T3和第四温度传感器T4,第一温度传感器T1的感温探头设置于相变蓄冷箱的第一出入口连通管路内,第二温度传感器T2的感温探头设置于相变蓄冷箱的第二出入口连通管路内,第三温度传感器T3的感温探头设置于相变蓄冷箱内,第四温度传感器T4的感温探头设置于第一电动开关阀V1和第一电动调节阀VT1的连通管路内。Preferably, it also includes a first temperature sensor T1, a second temperature sensor T2, a third temperature sensor T3 and a fourth temperature sensor T4 which are communicatively connected to the control and monitoring terminal, the temperature sensing probe of the first temperature sensor T1 is arranged in the first inlet and outlet connecting pipeline of the phase change cold storage box, the temperature sensing probe of the second temperature sensor T2 is arranged in the second inlet and outlet connecting pipeline of the phase change cold storage box, the temperature sensing probe of the third temperature sensor T3 is arranged in the phase change cold storage box, and the temperature sensing probe of the fourth temperature sensor T4 is arranged in the connecting pipeline of the first electric switch valve V1 and the first electric regulating valve VT1.
优选的,还包括压差旁通装置,集水器通过压差旁通装置连通分水器。Preferably, it also includes a pressure difference bypass device, and the water collector is connected to the water distributor via the pressure difference bypass device.
优选的,还包括定压补水装置,定压补水装置连通集水器。Preferably, it also includes a constant pressure water replenishment device, which is connected to the water collector.
第二方面,为了控制上述地铁车站相变蓄冷空调系统,本发明提供了一种地铁车站相变蓄冷空调系统的控制方法,包括:In a second aspect, in order to control the above-mentioned phase-change cold storage air conditioning system of a subway station, the present invention provides a control method of the phase-change cold storage air conditioning system of a subway station, comprising:
S1:获取预先设定的电价分级时段、供冷时段、相变蓄冷箱的蓄冷设定水温Tch,set、第一供水设定温度Tg,set1、第二供水设定温度Tg,set2、蓄冷出入口设定温差△TW,set1、放冷出入口设定温差△TW,set2、目标蓄冷量Qch,set和峰值电价时段的负荷预测值Qpeak;S1: Obtain the preset electricity price classification period, cooling period, the phase change cold storage tank cold storage set water temperature T ch,set , the first water supply set temperature T g,set1 , the second water supply set temperature T g,set2 , the cold storage inlet and outlet set temperature difference △T W,set1 , the cooling outlet and inlet set temperature difference △T W,set2 , the target cooling capacity Q ch,set and the load forecast value Q peak during the peak electricity price period;
其中,电价分级时段包括电价平段、尖峰电价时段、峰值电价时段和低谷电价时段;Among them, the electricity price classification period includes the flat electricity price period, the peak electricity price period, the peak electricity price period and the valley electricity price period;
S2:获取相变蓄冷箱的当前水流量L、第一温度传感器T1的第一监测温度TW,in、第二温度传感器T2的第二监测温度TW,out、第三温度传感器T3的检测温度TW和第四温度传感器T4的第四监测温度Tchiller,out;S2: Obtain the current water flow L of the phase change cold storage tank, the first monitoring temperature T W,in of the first temperature sensor T1, the second monitoring temperature T W,out of the second temperature sensor T2, the detection temperature T W of the third temperature sensor T3 and the fourth monitoring temperature T chiller,out of the fourth temperature sensor T4;
S3:若当前时间不位于供冷时段,进入步骤S4,否则,进入步骤S7;S3: If the current time is not in the cooling period, proceed to step S4; otherwise, proceed to step S7;
S4:若当前时间位于低谷电价时段,进入步骤S5,否则,返回步骤S1;S4: If the current time is in the off-peak electricity price period, proceed to step S5, otherwise, return to step S1;
S5:当前蓄冷量Qch不小于目标蓄冷量Qch,set或第二监测温度TW,out与第一监测温度TW,in之差小于蓄冷出入口设定温差△TW,set1时,返回步骤S1,否则,执行步骤S6;S5: When the current cold storage capacity Q ch is not less than the target cold storage capacity Q ch,set or the difference between the second monitoring temperature T W,out and the first monitoring temperature T W,in is less than the cold storage inlet and outlet set temperature difference △T W,set1 , return to step S1; otherwise, execute step S6;
S6:执行制冷主机蓄冷模式,当第四监测温度Tchiller,out等于蓄冷设定水温Tch,set时,返回步骤S1;S6: Execute the cold storage mode of the refrigeration host. When the fourth monitoring temperature T chiller,out is equal to the cold storage set water temperature T ch,set , return to step S1;
S7:若当前时间位于尖峰电价时段,进入步骤S8;若当前时间位于峰值电价时段,进入步骤S13;若当前时间位于电价平段,进入步骤S9;若当前时间位于低谷电价时段,进入步骤S14;S7: If the current time is in the peak electricity price period, go to step S8; if the current time is in the peak electricity price period, go to step S13; if the current time is in the flat electricity price period, go to step S9; if the current time is in the valley electricity price period, go to step S14;
S8:判断当天是否已停止过相变蓄冷箱供冷,若是,进入步骤S9,若否,进入步骤S10;S8: Determine whether the phase change cold storage box has stopped cooling on the day, if so, go to step S9, if not, go to step S10;
其中,停止过相变蓄冷箱供冷的当天初始值为否;Among them, the initial value of the day when the cooling supply through the phase change cold storage box is stopped is No;
S9:执行制冷主机单独供冷模式,当所述第四监测温度Tchiller,out等于第二供水设定温度Tg,set2时,返回步骤S1;S9: Execute the cooling mode of the refrigeration host alone. When the fourth monitoring temperature T chiller,out is equal to the second water supply set temperature T g,set2 , return to step S1;
S10:判断当天是否已运行开启制冷主机和相变蓄冷箱联合供冷模式,若是,进入步骤S11,若否,进入步骤S12;S10: Determine whether the refrigeration host and the phase change cold storage box have been turned on for the day to start the combined cooling mode. If so, proceed to step S11; if not, proceed to step S12;
其中,制冷主机和相变蓄冷箱联合供冷模式的当天初始值为否;Among them, the initial value of the day for the combined cooling mode of the refrigeration host and the phase change cold storage box is No;
S11:执行制冷主机和相变蓄冷箱联合供冷模式,当第二监测温度TW,out和第一监测温度TW,in之差是否小于放冷出入口设定温差△TW,set2,记录并停止当天相变蓄冷箱供冷后进入步骤S9,否则,返回步骤S1;S11: Execute the joint cooling mode of the refrigeration host and the phase change cold storage box. When the difference between the second monitored temperature T W,out and the first monitored temperature T W,in is less than the set temperature difference △T W,set2 of the cooling inlet and outlet, record and stop the cooling of the phase change cold storage box on that day and then enter step S9. Otherwise, return to step S1.
S12:执行相变蓄冷箱单独供冷模式,当第二监测温度TW,out小于或等于所述第一供水设定温度Tg,set1时,返回步骤S1,否则,进入步骤S11;S12: Execute the phase change cold storage tank independent cooling mode. When the second monitoring temperature T W,out is less than or equal to the first water supply set temperature T g,set1 , return to step S1; otherwise, enter step S11;
S13:当前蓄冷量Qch大于负荷预测值Qpeak时,进入步骤S8,否则,进入步骤S9;S13: When the current cooling capacity Qch is greater than the load prediction value Qpeak , proceed to step S8; otherwise, proceed to step S9;
S14:当前蓄冷量Qch不小于目标蓄冷量Qch,set或第二监测温度TW,out与第一监测温度TW,in之差小于蓄冷出入口设定温差△TW,set1时,进入步骤S9,否则,进入步骤S15;S14: When the current cold storage capacity Q ch is not less than the target cold storage capacity Q ch,set or the difference between the second monitoring temperature T W,out and the first monitoring temperature T W,in is less than the cold storage inlet and outlet set temperature difference ΔT W,set1 , proceed to step S9; otherwise, proceed to step S15;
S15:执行制冷主机同时供冷和蓄冷模式,当第四监测温度Tchiller,out等于蓄冷设定水温Tch,set时,返回步骤S1。S15: Execute the cooling host in the simultaneous cooling and cold storage mode. When the fourth monitored temperature T chiller,out is equal to the cold storage set water temperature T ch,set , return to step S1.
具体的,制冷主机蓄冷模式包括:Specifically, the cooling host cold storage mode includes:
开启冷水机组、冷冻水泵、冷却塔、冷却水泵、第一电动开关阀V1、第二电动开关阀V2、第三电动开关阀V3、第四电动开关阀V4、电动双向开关阀V6和第二电动双向调节阀VT2,关闭电动双向开关阀V5和第一电动调节阀VT1;Turn on the chiller, the chilled water pump, the cooling tower, the cooling water pump, the first electric switch valve V1, the second electric switch valve V2, the third electric switch valve V3, the fourth electric switch valve V4, the electric two-way switch valve V6 and the second electric two-way regulating valve VT2, and turn off the electric two-way switch valve V5 and the first electric regulating valve VT1;
制冷主机单独供冷模式包括:The refrigeration host independent cooling mode includes:
开启冷水机组、冷冻水泵、冷却塔、冷却水泵、第一电动开关阀V1、第二电动开关阀V2、第三电动开关阀V3、第四电动开关阀V4和第一电动调节阀VT1,关闭第五电动开关阀V5、电动双向开关阀V6和第二电动双向调节阀VT2;Turn on the chiller, the chilled water pump, the cooling tower, the cooling water pump, the first electric switch valve V1, the second electric switch valve V2, the third electric switch valve V3, the fourth electric switch valve V4 and the first electric regulating valve VT1, and turn off the fifth electric switch valve V5, the electric two-way switch valve V6 and the second electric two-way regulating valve VT2;
制冷主机和相变蓄冷箱联合供冷模式包括:The combined cooling mode of the refrigeration host and phase change cold storage box includes:
开启冷水机组、冷冻水泵、冷却塔、冷却水泵、第一电动开关阀V1、第二电动开关阀V2、第三电动开关阀V3、第四电动开关阀V4、第五电动开关阀V5、第一电动调节阀VT1和第二电动双向调节阀VT2,关闭电动双向开关阀V6;Turn on the chiller, the chilled water pump, the cooling tower, the cooling water pump, the first electric switch valve V1, the second electric switch valve V2, the third electric switch valve V3, the fourth electric switch valve V4, the fifth electric switch valve V5, the first electric regulating valve VT1 and the second electric two-way regulating valve VT2, and close the electric two-way switch valve V6;
相变蓄冷箱单独供冷模式包括:The phase change cold storage box independent cooling mode includes:
开启冷冻水泵、第五电动开关阀V5、第一电动调节阀VT1和第二电动双向调节阀VT2,关闭冷水机组、冷却塔、冷却水泵、第一电动开关阀V1、第二电动开关阀V2、第三电动开关阀V3、第四电动开关阀V4和电动双向开关阀V6;Turn on the chilled water pump, the fifth electric switch valve V5, the first electric regulating valve VT1 and the second electric two-way regulating valve VT2, and turn off the chiller, cooling tower, cooling water pump, the first electric switch valve V1, the second electric switch valve V2, the third electric switch valve V3, the fourth electric switch valve V4 and the electric two-way switch valve V6;
制冷主机同时供冷和蓄冷模式包括:The refrigeration host's simultaneous cooling and cold storage modes include:
开启冷水机组、冷冻水泵、冷却塔、冷却水泵、第一电动开关阀V1、第二电动开关阀V2、第三电动开关阀V3、第四电动开关阀V4、电动双向开关阀V6、第一电动调节阀VT1和第二电动双向调节阀VT2,关闭第五电动开关阀V5。Turn on the chiller, the refrigerated water pump, the cooling tower, the cooling water pump, the first electric switch valve V1, the second electric switch valve V2, the third electric switch valve V3, the fourth electric switch valve V4, the electric two-way switch valve V6, the first electric regulating valve VT1 and the second electric two-way regulating valve VT2, and close the fifth electric switch valve V5.
本发明至少存在以下优点:The present invention has at least the following advantages:
1)相较于现有技术,本发明系统通过夜间低谷电价蓄冷和白天电价高峰时释冷,来实现地铁车站空调用电的移峰填谷,对降低空调运行费用和缓解电网压力有显著的效果。1) Compared with the prior art, the system of the present invention realizes peak-shifting and valley-filling of air-conditioning electricity consumption in subway stations by storing cold during low-peak electricity prices at night and releasing cold during peak electricity prices during the day, which has a significant effect on reducing air-conditioning operating costs and relieving grid pressure.
2)相较于现有技术,本发明系统采用了相变蓄冷箱体积相对较小,可以有效减少占地面积,节约土建成本。2) Compared with the prior art, the system of the present invention adopts a phase change cold storage box with a relatively small volume, which can effectively reduce the floor space and save civil engineering costs.
3)相较于现有技术,本发明系统的相变蓄冷箱相比常规的蓄冷系统的水池,去除了板式换热器的设置,并在内部增设了多个相变蓄冷模块,蓄冷能力更强,并且采用相变蓄冷箱替代水池可有效减小常规水蓄冷系统的倒空和承压风险,更有利于系统稳定运行。3) Compared with the prior art, the phase change cold storage box of the system of the present invention eliminates the plate heat exchanger and adds multiple phase change cold storage modules inside the conventional cold storage system water tank, so the cold storage capacity is stronger. The use of phase change cold storage box instead of water tank can effectively reduce the emptying and pressure risks of conventional water cold storage system, which is more conducive to the stable operation of the system.
4)相较于现有技术,通过本发明系统配套的控制方法,能够实现制冷主机与相变蓄冷箱的联合供冷,可有效降低制冷主机设计容量,降低系统初投资费用。并且,本发明方法还能根据实际情况灵活调整本发明系统的运行模式,以满足地铁车站不同工况条件下的供冷需求。4) Compared with the prior art, the control method of the system of the present invention can realize the joint cooling of the refrigeration host and the phase change cold storage box, which can effectively reduce the design capacity of the refrigeration host and reduce the initial investment cost of the system. In addition, the method of the present invention can also flexibly adjust the operation mode of the system of the present invention according to actual conditions to meet the cooling needs of subway stations under different working conditions.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其它的附图。In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
图1为本发明实施例一中地铁车站相变蓄冷空调系统的结构示意图。FIG1 is a schematic structural diagram of a phase-change cold storage air-conditioning system for a subway station in Embodiment 1 of the present invention.
附图标记:1、冷水机组;2、冷冻水泵;3、冷却塔;4、冷却水泵;5、集水器;6、分水器;7、压差旁通装置;8、相变蓄冷箱;81、相变蓄冷模块;9、定压补水装置。Figure numerals: 1. Chiller; 2. Chilled water pump; 3. Cooling tower; 4. Cooling water pump; 5. Water collector; 6. Water distributor; 7. Pressure difference bypass device; 8. Phase change cold storage box; 81. Phase change cold storage module; 9. Constant pressure water replenishment device.
具体实施方式DETAILED DESCRIPTION
下面将结合附图对本发明的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
在本发明的描述中,需要说明的是,术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本发明的限制。In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.
实施例一Embodiment 1
如图1所示,本实施例公开了一种地铁车站相变蓄冷空调系统,内置有控制监控终端,该系统包括冷水机组1、冷冻水泵2、冷却塔3、冷却水泵4、集水器5、分水器6、压差旁通装置7、相变蓄冷箱8、相变蓄冷模块81、定压补水装置9、第一电动开关阀V1、第二电动开关阀V2、第三电动开关阀V3、第四电动开关阀V4、电动双向开关阀V5、电动双向开关阀V6、第一电动调节阀VT1和第二电动双向调节阀VT2。As shown in Figure 1, this embodiment discloses a phase-change cold storage air-conditioning system for a subway station, which has a built-in control and monitoring terminal. The system includes a chiller 1, a chilled water pump 2, a cooling tower 3, a cooling water pump 4, a water collector 5, a water distributor 6, a pressure difference bypass device 7, a phase-change cold storage box 8, a phase-change cold storage module 81, a constant pressure water replenishment device 9, a first electric switch valve V1, a second electric switch valve V2, a third electric switch valve V3, a fourth electric switch valve V4, an electric two-way switch valve V5, an electric two-way switch valve V6, a first electric regulating valve VT1 and a second electric two-way regulating valve VT2.
其中,集水器5的入水口连通空调机组的冷冻水回水端,冷冻水泵2的入水口连通集水器5的出水口,冷水机组1内置有蒸发器和冷凝器,其蒸发器的入口连通冷冻水泵2的出水口,第一电动开关阀V1的入水口连通蒸发器的出口,第一电动调节阀VT1的入水口连通第一电动开关阀V1的出水口,分水器6的入水口连通第一电动调节阀VT1的出水口,冷却水泵4的出水口连通冷凝器的入口,第二电动开关阀V2的入水口连通冷凝器的出口,第三电动开关阀V3的入水口连通第二电动开关阀V2的出水口,第四电动开关阀V4的出水口连通冷却水泵4的入水口,冷却塔3的入水口连通第三电动开关阀V3的出水口,冷却塔3的出水口连通第四电动开关阀V4的入水口。Among them, the water inlet of the water collector 5 is connected to the chilled water return end of the air-conditioning unit, the water inlet of the chilled water pump 2 is connected to the water outlet of the water collector 5, the chiller 1 is equipped with an evaporator and a condenser, the inlet of the evaporator is connected to the water outlet of the chilled water pump 2, the water inlet of the first electric switch valve V1 is connected to the outlet of the evaporator, the water inlet of the first electric regulating valve VT1 is connected to the water outlet of the first electric switch valve V1, the water inlet of the water distributor 6 is connected to the water outlet of the first electric regulating valve VT1, the water outlet of the cooling water pump 4 is connected to the inlet of the condenser, the water inlet of the second electric switch valve V2 is connected to the outlet of the condenser, the water inlet of the third electric switch valve V3 is connected to the water outlet of the second electric switch valve V2, the water outlet of the fourth electric switch valve V4 is connected to the water inlet of the cooling water pump 4, the water inlet of the cooling tower 3 is connected to the water outlet of the third electric switch valve V3, and the water outlet of the cooling tower 3 is connected to the water inlet of the fourth electric switch valve V4.
通过上述技术方案,集水器5、冷冻水泵2、冷水机组1、第一电动开关阀V1、第一电动调节阀VT1、分水器6、冷却水泵4、第二电动开关阀V2、第三电动开关阀V3、第四电动开关阀V4和冷却塔3的连接关系起到主要的制冷功能。Through the above technical scheme, the connection relationship between the water collector 5, the chilled water pump 2, the chiller 1, the first electric switch valve V1, the first electric regulating valve VT1, the water distributor 6, the cooling water pump 4, the second electric switch valve V2, the third electric switch valve V3, the fourth electric switch valve V4 and the cooling tower 3 plays the main refrigeration function.
更进一步的,相变蓄冷箱8包括第一出入口和第二出入口,第一出入口通过第二电动双向调节阀VT2连通第一电动开关阀V1和第一电动调节阀VT1的连通管道。而第二出入口通过电动双向开关阀V5连通冷冻水泵2的出水口,第二出入口通过电动双向开关阀V6连通冷冻水泵2的入水口。Furthermore, the phase change cold storage tank 8 includes a first inlet and a second inlet, wherein the first inlet and the second inlet are connected to the first electric switch valve V1 and the connecting pipe of the first electric control valve VT1 through the second electric two-way regulating valve VT2. The second inlet and the second inlet are connected to the outlet of the chilled water pump 2 through the electric two-way switch valve V5, and the second inlet and the second inlet are connected to the water inlet of the chilled water pump 2 through the electric two-way switch valve V6.
通过上述技术方案,第二电动双向调节阀VT2、电动双向开关阀V5、电动双向开关阀V6和相变蓄冷箱8的连接关系共同兼具蓄冷和供冷功能。Through the above technical solution, the connection relationship between the second electric two-way regulating valve VT2, the electric two-way switch valve V5, the electric two-way switch valve V6 and the phase change cold storage box 8 has both cold storage and cold supply functions.
相较于现有技术,本发明系统的控制监控终端或机组工作人员可以灵活调节对应阀体的工作状态,切换供冷机组和蓄冷机组的工作模式,实现地铁车站空调用电的移峰填谷,从而提高经济效益。Compared with the prior art, the control and monitoring terminal or crew members of the system of the present invention can flexibly adjust the working status of the corresponding valve body, switch the working modes of the cooling unit and the cold storage unit, and realize peak shifting and valley filling of air-conditioning electricity consumption in subway stations, thereby improving economic benefits.
为了实时监测相变蓄冷箱8的进出水流量,本发明系统在相变蓄冷箱8和第二电动双向调节阀VT2的连通管路之间设置了流量传感器P,其通信连接于控制监控终端,当相变蓄冷箱8的进出水流量通过流量传感器P监测并传输至控制监控终端。In order to monitor the inlet and outlet water flow of the phase change cold storage tank 8 in real time, the system of the present invention sets a flow sensor P between the phase change cold storage tank 8 and the connecting pipeline of the second electric two-way regulating valve VT2, and its communication is connected to the control and monitoring terminal. When the inlet and outlet water flow of the phase change cold storage tank 8 is monitored by the flow sensor P and transmitted to the control and monitoring terminal.
为了实现本发明系统的精确监控,本发明系统还包括第一温度传感器T1、第二温度传感器T2、第三温度传感器T3和第四温度传感器T4,第一温度传感器T1的感温探头设置于相变蓄冷箱8的第一出入口连通管路内,第二温度传感器T2的感温探头设置于相变蓄冷箱8的第二出入口连通管路内,第三温度传感器T3的感温探头设置于相变蓄冷箱8内,第四温度传感器T4的感温探头设置于第一电动开关阀V1和第一电动调节阀VT1的连通管路内。上述传感器均通信连接于控制监控终端,各个对应位置的温度信息传输至控制监控终端。In order to realize accurate monitoring of the system of the present invention, the system of the present invention further includes a first temperature sensor T1, a second temperature sensor T2, a third temperature sensor T3 and a fourth temperature sensor T4. The temperature sensing probe of the first temperature sensor T1 is arranged in the first inlet and outlet connecting pipeline of the phase change cold storage box 8, the temperature sensing probe of the second temperature sensor T2 is arranged in the second inlet and outlet connecting pipeline of the phase change cold storage box 8, the temperature sensing probe of the third temperature sensor T3 is arranged in the phase change cold storage box 8, and the temperature sensing probe of the fourth temperature sensor T4 is arranged in the connecting pipeline of the first electric switch valve V1 and the first electric regulating valve VT1. The above sensors are all communicatively connected to the control monitoring terminal, and the temperature information of each corresponding position is transmitted to the control monitoring terminal.
优选的,冷水机组1、冷冻水泵23、冷却塔和冷却水泵4在数量上一一对应。Preferably, the chiller 1 , the chilled water pump 23 , the cooling tower and the cooling water pump 4 correspond one to one in number.
为了提高本发明系统的负荷、供冷和蓄冷能力,当冷水机组1、冷冻水泵2、冷却塔3和冷却水泵4的数量大于一时,冷水机组1连同第一电动开关阀V1所在管路之间并联连接,冷水机组1连同第二电动开关阀V2所在管路之间并联连接,多个冷冻水泵2之间并联连接,多个冷却塔3分别连同第三电动开关阀V3和第四电动开关阀V4所在管路之间并联连接,多个冷却水泵4之间并联连接,冷水机组1、冷冻水泵2、冷却塔3和冷却水泵4的开启和关闭台数一一对应。In order to improve the load, cooling and cold storage capacity of the system of the present invention, when the number of chillers 1, refrigerated water pumps 2, cooling towers 3 and cooling water pumps 4 is greater than one, the chiller 1 is connected in parallel with the pipeline where the first electric switch valve V1 is located, the chiller 1 is connected in parallel with the pipeline where the second electric switch valve V2 is located, multiple refrigerated water pumps 2 are connected in parallel, multiple cooling towers 3 are respectively connected in parallel with the pipelines where the third electric switch valve V3 and the fourth electric switch valve V4 are located, and multiple cooling water pumps 4 are connected in parallel, and the number of chillers 1, refrigerated water pumps 2, cooling towers 3 and cooling water pumps 4 that are opened and closed corresponds one to one.
在本实施例中,定压补水装置9通过膨胀管连通集水器5,以在集水器5的供水压力不足时,向集水器5供水,使本发明系统能够在稳定的水压下正常运行。In this embodiment, the constant pressure water replenishment device 9 is connected to the water collector 5 through an expansion pipe to supply water to the water collector 5 when the water supply pressure of the water collector 5 is insufficient, so that the system of the present invention can operate normally under stable water pressure.
在本实施例中,集水器5通过压差旁通装置7连通分水器6,用于保持集水器5和分水器6的压差恒定,进一步使本发明系统能够在稳定的水压下正常运行。In this embodiment, the water collector 5 is connected to the water distributor 6 via the pressure difference bypass device 7, which is used to keep the pressure difference between the water collector 5 and the water distributor 6 constant, further enabling the system of the present invention to operate normally under stable water pressure.
优选的,相变蓄冷箱8的外壳采用金属壳体或塑料壳体,其外侧四周设置有离心玻璃棉,以避免热量向环境中散失。相变蓄冷箱8内置有多个相变蓄冷模块81,多个相变蓄冷模块81相互平行且间隔分布,使多个相变蓄冷模块81之间留有一定的间距形成水流通道。相变蓄冷模块81由相变层和支撑层构成,相变层镶嵌于支撑层内,相变层采用无机水合盐、石蜡或有机-无机复合相变材料制成,支撑层采用金属板或塑料壳体,相变层的相变温度选用8℃-10℃。Preferably, the outer shell of the phase change cold storage box 8 is made of a metal shell or a plastic shell, and centrifugal glass wool is arranged around the outer side to prevent heat from being lost to the environment. The phase change cold storage box 8 has multiple phase change cold storage modules 81 built in. The multiple phase change cold storage modules 81 are parallel to each other and spaced apart, so that a certain distance is left between the multiple phase change cold storage modules 81 to form a water flow channel. The phase change cold storage module 81 is composed of a phase change layer and a support layer. The phase change layer is embedded in the support layer. The phase change layer is made of inorganic hydrated salt, paraffin or organic-inorganic composite phase change material. The support layer is made of metal plate or plastic shell. The phase change temperature of the phase change layer is selected to be 8℃-10℃.
通过上述技术方案,本发明系统对相变蓄冷箱8的内部结构进行了改进,此款相变蓄冷箱8具有更好的蓄冷和保温能力。相较于现有技术,此款箱体的体积相对较小,可以有效减少占地面积,节约土建成本。Through the above technical solution, the system of the present invention improves the internal structure of the phase change cold storage box 8, and this phase change cold storage box 8 has better cold storage and heat preservation capabilities. Compared with the prior art, the volume of this box is relatively small, which can effectively reduce the floor space and save civil engineering costs.
实施例二Embodiment 2
在实施例一的基础上,本发明在其控制监控终端内置了一种地铁车站相变蓄冷空调系统的控制方法,该方法包括:On the basis of the first embodiment, the present invention has a control method for a phase-change cold storage air conditioning system in a subway station built into its control and monitoring terminal, the method comprising:
S1:获取预先设定的电价分级时段、供冷时段、相变蓄冷箱的蓄冷设定水温Tch,set、第一供水设定温度Tg,set1、第二供水设定温度Tg,set2、蓄冷出入口设定温差△TW,set1、放冷出入口设定温差△TW,set2、目标蓄冷量Qch,set和峰值电价时段的负荷预测值Qpeak。S1: Obtain the preset electricity price classification period, cooling period, the phase change cold storage tank cold storage set water temperature T ch,set , the first water supply set temperature T g,set1 , the second water supply set temperature T g,set2 , the cold storage inlet and outlet set temperature difference △T W,set1 , the cooling outlet and inlet set temperature difference △T W,set2 , the target cooling capacity Q ch,set and the load forecast value Q peak during the peak electricity price period.
在本实施例中,电价分级时段包括电价平段、尖峰电价时段(早晚通勤高峰)、峰值电价时段和低谷电价时段。In this embodiment, the electricity price classification period includes a flat electricity price period, a peak electricity price period (morning and evening commuting peak), a peak electricity price period and a valley electricity price period.
S2:获取相变蓄冷箱的当前水流量L、第一温度传感器T1的第一监测温度TW,in、第二温度传感器T2的第二监测温度TW,out、第三温度传感器T3的检测温度TW和第四温度传感器T4的第四监测温度Tchiller,out。S2: Obtain the current water flow L of the phase change cold storage tank, the first monitoring temperature T W,in of the first temperature sensor T1, the second monitoring temperature T W,out of the second temperature sensor T2, the detection temperature T W of the third temperature sensor T3 and the fourth monitoring temperature T chiller,out of the fourth temperature sensor T4.
在本实施例中,第一温度传感器T1的第一监测温度TW,in作为相变蓄冷箱的第一出入口的监测水温,第二温度传感器T2的第二监测温度TW,out作为相变蓄冷箱的第二出入口的监测水温,第三温度传感器T3的第三监测温度TW作为相变蓄冷箱内部水的温度,第四温度传感器T4的第四监测温度Tchiller,out作为冷水机组蒸发器的出口水温。上述温度信息和流量信息均由控制监控终端接收并进行相应的信息处理。In this embodiment, the first monitoring temperature T W,in of the first temperature sensor T1 is used as the monitoring water temperature of the first inlet and outlet of the phase change cold storage box, the second monitoring temperature T W,out of the second temperature sensor T2 is used as the monitoring water temperature of the second inlet and outlet of the phase change cold storage box, the third monitoring temperature T W of the third temperature sensor T3 is used as the temperature of the water inside the phase change cold storage box, and the fourth monitoring temperature T chiller,out of the fourth temperature sensor T4 is used as the outlet water temperature of the chiller evaporator. The above temperature information and flow information are received by the control and monitoring terminal and corresponding information processing is performed.
S3:若当前时间不位于供冷时段,进入步骤S4,否则,进入步骤S7。S3: If the current time is not in the cooling period, proceed to step S4; otherwise, proceed to step S7.
S4:若当前时间位于低谷电价时段,进入步骤S5,否则,返回步骤S1。S4: If the current time is in the off-peak electricity price period, proceed to step S5; otherwise, return to step S1.
S5:当前蓄冷量Qch不小于目标蓄冷量Qch,set或第二监测温度TW,out与第一监测温度TW,in之差小于蓄冷出入口设定温差△TW,set1时,返回步骤S1,否则,执行步骤S6。S5: When the current cold storage capacity Q ch is not less than the target cold storage capacity Q ch,set or the difference between the second monitoring temperature T W,out and the first monitoring temperature T W,in is less than the set temperature difference ΔT W,set1 between the cold storage inlet and outlet, return to step S1; otherwise, execute step S6.
S6:执行制冷主机蓄冷模式,当第四监测温度Tchiller,out等于蓄冷设定水温Tch,set时,返回步骤S1。S6: Execute the cold storage mode of the refrigeration host. When the fourth monitored temperature T chiller,out is equal to the cold storage set water temperature T ch,set , return to step S1.
具体的,制冷主机蓄冷模式包括:开启冷水机组、冷冻水泵、冷却塔、冷却水泵、第一电动开关阀V1、第二电动开关阀V2、第三电动开关阀V3、第四电动开关阀V4、电动双向开关阀V6、第二电动双向调节阀VT2,关闭电动双向开关阀V5和第一电动调节阀VT1。Specifically, the cold storage mode of the refrigeration host includes: turning on the chiller, the chilled water pump, the cooling tower, the cooling water pump, the first electric switch valve V1, the second electric switch valve V2, the third electric switch valve V3, the fourth electric switch valve V4, the electric two-way switch valve V6, the second electric two-way regulating valve VT2, and closing the electric two-way switch valve V5 and the first electric regulating valve VT1.
通过上述技术方案,在集水箱和分水箱停止供水的情况下,停止供冷,开启制冷主机蓄冷模式,冷水机组的冷凝器出口的冷却水依次流经第二电动开关阀V2、第三电动开关阀V3后进入冷却塔进行降温冷却,再通过第四电动开关阀V4和冷却水泵返回冷水机组的冷凝器;而冷水机组的蒸发器出口的冷冻水流经第一电动开关阀V1、第二电动双向调节阀VT2后进入相变蓄冷箱,冷却并凝固相变蓄冷模块内的相变材料(相变层),将冷量储存在相变材料中,相变蓄冷箱出口的冷冻水流经电动双向开关阀V6和冷冻水泵返回冷水机组的蒸发器中。相较于现有技术,当前时间处于低谷电价时段且当前蓄冷量Qch不足时,执行制冷主机蓄冷模式,以实现相变蓄冷箱的自动蓄冷。Through the above technical solution, when the water supply of the water collecting tank and the water distribution tank stops, the cooling is stopped, and the cooling host cold storage mode is turned on. The cooling water at the outlet of the condenser of the chiller flows through the second electric switch valve V2 and the third electric switch valve V3 in sequence, and then enters the cooling tower for cooling, and then returns to the condenser of the chiller through the fourth electric switch valve V4 and the cooling water pump; and the chilled water at the outlet of the evaporator of the chiller flows through the first electric switch valve V1 and the second electric two-way regulating valve VT2 and then enters the phase change cold storage box, cools and solidifies the phase change material (phase change layer) in the phase change cold storage module, and stores the cold in the phase change material. The chilled water at the outlet of the phase change cold storage box flows through the electric two-way switch valve V6 and the chilled water pump and returns to the evaporator of the chiller. Compared with the prior art, when the current time is in the off-peak electricity price period and the current cold storage capacity Q ch is insufficient, the refrigeration host cold storage mode is executed to realize the automatic cold storage of the phase change cold storage box.
S7:若当前时间位于尖峰电价时段,进入步骤S8;若当前时间位于峰值电价时段,进入步骤S13;若当前时间位于电价平段,进入步骤S9;若当前时间位于低谷电价时段,进入步骤S14。S7: If the current time is in the peak electricity price period, go to step S8; if the current time is in the peak electricity price period, go to step S13; if the current time is in the flat electricity price period, go to step S9; if the current time is in the valley electricity price period, go to step S14.
S8:判断当天是否已停止过相变蓄冷箱供冷,若是,进入步骤S9,若否,进入步骤S10。S8: Determine whether the phase change cold storage box has stopped supplying cold on the day, if so, proceed to step S9, if not, proceed to step S10.
需要说明的是,若当天已停止过相变蓄冷箱供冷,说明相变蓄冷箱的蓄冷量已经耗尽,后续步骤仅由制冷主机供冷。若当天未停止过相变蓄冷箱供冷,说明相变蓄冷箱蓄冷量充足,可以用于后续地铁运营时段的供冷。It should be noted that if the phase change cold storage box has stopped supplying cooling on the day, it means that the cold storage capacity of the phase change cold storage box has been exhausted, and the subsequent steps will only be provided by the refrigeration host. If the phase change cold storage box has not stopped supplying cooling on the day, it means that the phase change cold storage box has sufficient cold storage capacity and can be used for cooling during the subsequent subway operation period.
S9:执行制冷主机单独供冷模式,当所述第四监测温度Tchiller,out等于第二供水设定温度Tg,set2时,返回步骤S1。S9: Execute the independent cooling mode of the refrigeration host. When the fourth monitored temperature T chiller,out is equal to the second water supply set temperature T g,set2 , return to step S1.
具体的,制冷主机单独供冷模式包括:开启冷水机组、冷冻水泵、冷却塔、冷却水泵、第一电动开关阀V1、第二电动开关阀V2、第三电动开关阀V3、第四电动开关阀V4和第一电动调节阀VT1,关闭第五电动开关阀V5、电动双向开关阀V6和第二电动双向调节阀VT2。Specifically, the refrigeration host's separate cooling mode includes: turning on the chiller, the chilled water pump, the cooling tower, the cooling water pump, the first electric switch valve V1, the second electric switch valve V2, the third electric switch valve V3, the fourth electric switch valve V4 and the first electric regulating valve VT1, and closing the fifth electric switch valve V5, the electric two-way switch valve V6 and the second electric two-way regulating valve VT2.
通过上述技术方案,制冷主机单独供冷模式执行时,处于地铁运营时段,冷水机组的冷凝器出口的冷却水依次流经第二电动开关阀V2、第三电动开关阀V3后进入冷却塔进行降温和冷却,再通过第四电动开关阀V4和冷却水泵返回冷水机组的冷凝器。冷水机组的蒸发器出口的冷冻水依次流经第一电动开关阀V1、第一电动调节阀VT1和分水器并为空调机组供应冷冻水,空调机组冷冻水的回水经集水器、冷冻水泵返回至冷水机组的蒸发器,从而实现本发明系统的制冷主机单独供冷,使地铁车站的热环境得到冷却降温。Through the above technical solution, when the refrigeration host is in the independent cooling mode, during the subway operation period, the cooling water at the outlet of the condenser of the chiller flows through the second electric switch valve V2 and the third electric switch valve V3 in sequence, and then enters the cooling tower for cooling and cooling, and then returns to the condenser of the chiller through the fourth electric switch valve V4 and the cooling water pump. The chilled water at the outlet of the evaporator of the chiller flows through the first electric switch valve V1, the first electric regulating valve VT1 and the water distributor in sequence and supplies chilled water to the air conditioning unit. The return water of the chilled water of the air conditioning unit returns to the evaporator of the chiller through the water collector and the chilled water pump, thereby realizing the independent cooling of the refrigeration host of the system of the present invention, so that the thermal environment of the subway station is cooled down.
S10:判断当天是否已运行开启制冷主机和相变蓄冷箱联合供冷模式,若是,进入步骤S11,若否,进入步骤S12。S10: Determine whether the refrigeration host and phase change cold storage box have been turned on for the combined cooling mode on that day. If so, proceed to step S11; if not, proceed to step S12.
需要说明的是,上述制冷主机和相变蓄冷箱联合供冷模式的初始值为否,需要机组人员或控制监控终端根据初始值决定是否开启。It should be noted that the initial value of the combined cooling mode of the above-mentioned refrigeration main unit and phase change cold storage box is no, and the crew or the control monitoring terminal needs to decide whether to turn it on based on the initial value.
S11:执行制冷主机和相变蓄冷箱联合供冷模式,当第二监测温度TW,out和第一监测温度TW,in之差是否小于放冷出入口设定温差△TW,set2,记录并停止当天相变蓄冷箱供冷后进入步骤S9,否则,返回步骤S1。S11: Execute the joint cooling mode of the refrigeration host and the phase change cold storage box. When the difference between the second monitored temperature T W,out and the first monitored temperature T W,in is less than the set temperature difference △T W,set2 between the cooling inlet and outlet, record and stop the cooling of the phase change cold storage box on that day and then enter step S9. Otherwise, return to step S1.
具体的,制冷主机和相变蓄冷箱联合供冷模式包括:开启冷水机组、冷冻水泵、冷却塔、冷却水泵、第一电动开关阀V1、第二电动开关阀V2、第三电动开关阀V3、第四电动开关阀V4、第五电动开关阀V5、第一电动调节阀VT1和第二电动双向调节阀VT2,关闭电动双向开关阀V6。Specifically, the joint cooling mode of the refrigeration host and the phase change cold storage box includes: turning on the chiller, the chilled water pump, the cooling tower, the cooling water pump, the first electric switch valve V1, the second electric switch valve V2, the third electric switch valve V3, the fourth electric switch valve V4, the fifth electric switch valve V5, the first electric regulating valve VT1 and the second electric two-way regulating valve VT2, and closing the electric two-way switch valve V6.
通过上述技术方案,在地铁运营的尖峰电价时段,执行制冷主机和相变蓄冷箱联合供冷模式,冷水机组的冷凝器出口的冷却水依次流经第二电动开关阀V2、第三电动开关阀V3后进入冷却塔进行降温和冷却后,再通过第四电动开关阀V4和冷却水泵并返回冷水机组的冷凝器;空调机组冷冻水的回水流经集水器和冷冻水泵后,一部分流经第五电动开关阀V5后进入相变蓄冷箱被冷却降温,再流回第一电动调节阀VT1和分水器,为空调机组供应冷冻水,而另一部分返回冷水机组的蒸发器中进行降温和冷却,冷水机组的蒸发器出口的冷冻水依次流经第一电动开关阀V1、第一电动调节阀VT1和分水器后为空调机组供应冷冻水;其中,第一电动调节阀VT1和第二电动双向调节阀VT2的流量根据设定温度Tg,set2来调节。相较于现有技术,本发明方法实现了制冷主机和相变蓄冷箱联合供冷。Through the above technical scheme, during the peak electricity price period of subway operation, the refrigeration host and the phase change cold storage tank are implemented to jointly supply cooling mode. The cooling water at the outlet of the condenser of the chiller flows through the second electric switch valve V2 and the third electric switch valve V3 in sequence, and then enters the cooling tower for cooling and cooling, and then passes through the fourth electric switch valve V4 and the cooling water pump and returns to the condenser of the chiller; after the return water of the air-conditioning unit flows through the water collector and the chilled water pump, a part of it flows through the fifth electric switch valve V5 and enters the phase change cold storage tank to be cooled and cooled, and then flows back to the first electric regulating valve VT1 and the water distributor to supply chilled water to the air-conditioning unit, and the other part returns to the evaporator of the chiller for cooling and cooling. The chilled water at the outlet of the evaporator of the chiller flows through the first electric switch valve V1, the first electric regulating valve VT1 and the water distributor in sequence to supply chilled water to the air-conditioning unit; wherein, the flow of the first electric regulating valve VT1 and the second electric two-way regulating valve VT2 is adjusted according to the set temperature Tg ,set2 . Compared with the prior art, the method of the present invention realizes the combined cooling of the refrigeration main unit and the phase change cold storage box.
S12:执行相变蓄冷箱单独供冷模式,当第二监测温度TW,out小于或等于第一供水设定温度Tg,set1时,返回步骤S1,否则,进入步骤S11。S12: Execute the phase change cold storage tank independent cooling mode. When the second monitored temperature T W,out is less than or equal to the first water supply set temperature T g,set1 , return to step S1; otherwise, enter step S11.
具体的,相变蓄冷箱单独供冷模式包括:开启冷冻水泵、第五电动开关阀V5、第一电动调节阀VT1和第二电动双向调节阀VT2,关闭冷水机组、冷却塔、冷却水泵、第一电动开关阀V1、第二电动开关阀V2、第三电动开关阀V3、第四电动开关阀V4和电动双向开关阀V6。Specifically, the phase change cold storage box's separate cooling mode includes: turning on the chilled water pump, the fifth electric switch valve V5, the first electric regulating valve VT1 and the second electric two-way regulating valve VT2, and turning off the chiller, the cooling tower, the cooling water pump, the first electric switch valve V1, the second electric switch valve V2, the third electric switch valve V3, the fourth electric switch valve V4 and the electric two-way switch valve V6.
通过上述技术方案,在地铁运营的尖峰电价时段且相变蓄冷箱的蓄冷量充足,执行相变蓄冷箱单独供冷模式,相变蓄冷箱出口的冷冻水流经第二电动双向调节阀VT2、第一电动调节阀VT1和分水器后为空调机组供应冷冻水,空调机组冷冻水的回水依次流经集水器、冷冻水泵和第五电动开关阀V5后返回相变蓄冷箱中被降温冷却,上述过程反复进行,使地铁车站的热环境得到冷却降温。Through the above technical scheme, during the peak electricity price period of subway operation and when the phase change cold storage tank has sufficient cold storage capacity, the phase change cold storage tank is implemented in a separate cooling mode. The chilled water at the outlet of the phase change cold storage tank flows through the second electric two-way regulating valve VT2, the first electric regulating valve VT1 and the water distributor to supply chilled water to the air-conditioning unit. The return water of the chilled water of the air-conditioning unit flows through the water collector, the chilled water pump and the fifth electric switch valve V5 in turn and returns to the phase change cold storage tank to be cooled. The above process is repeated to cool the thermal environment of the subway station.
S13:当前蓄冷量Qch大于负荷预测值Qpeak时,进入步骤S8,否则,进入步骤S9。S13: When the current cooling capacity Qch is greater than the load prediction value Qpeak , proceed to step S8; otherwise, proceed to step S9.
需要说明的是,相变蓄冷箱在供冷的过程中,其自身的蓄冷量会逐渐减小,当减小至小于负荷预测值Qpeak时,说明相变蓄冷箱蓄冷量不足以供冷,执行步骤S9,否则执行步骤S8。It should be noted that, during the cooling process, the cold storage capacity of the phase change cold storage box will gradually decrease. When it decreases to less than the load prediction value Q peak , it means that the cold storage capacity of the phase change cold storage box is insufficient for cooling, and step S9 is executed, otherwise step S8 is executed.
S14:当前蓄冷量Qch不小于目标蓄冷量Qch,set或第二监测温度TW,out与第一监测温度TW,in之差小于蓄冷出入口设定温差△TW,set1时,进入步骤S9,否则,进入步骤S15。S14: When the current cold storage capacity Q ch is not less than the target cold storage capacity Q ch,set or the difference between the second monitoring temperature T W,out and the first monitoring temperature T W,in is less than the set temperature difference ΔT W,set1 of the cold storage inlet and outlet, proceed to step S9; otherwise, proceed to step S15.
通过上述技术方案,步骤S14能够针对低谷电价时段做出合理的判断,提高蓄冷能效。Through the above technical solution, step S14 can make a reasonable judgment for the off-peak electricity price period and improve the cold storage energy efficiency.
S15:执行制冷主机同时供冷和蓄冷模式,当第四监测温度Tchiller,out等于蓄冷设定水温Tch,set时,返回步骤S1。S15: Execute the cooling host in the simultaneous cooling and cold storage mode. When the fourth monitored temperature T chiller,out is equal to the cold storage set water temperature T ch,set , return to step S1.
具体的,开启冷水机组、冷冻水泵、冷却塔、冷却水泵、第一电动开关阀V1、第二电动开关阀V2、第三电动开关阀V3、第四电动开关阀V4、电动双向开关阀V6、第一电动调节阀VT1和第二电动双向调节阀VT2,关闭第五电动开关阀V5。Specifically, turn on the chiller, the refrigerated water pump, the cooling tower, the cooling water pump, the first electric switch valve V1, the second electric switch valve V2, the third electric switch valve V3, the fourth electric switch valve V4, the electric two-way switch valve V6, the first electric regulating valve VT1 and the second electric two-way regulating valve VT2, and close the fifth electric switch valve V5.
通过上述技术方案,在低谷电价时段,执行制冷主机同时供冷和蓄冷模式,此时冷水机组的蒸发器出口的冷冻水流经第一电动开关阀V1后,一部分流经第二电动双向调节阀VT2后流入相变蓄冷箱,冷却并凝固相变蓄冷模块中的相变材料,将冷量储存在相变材料中。相变蓄冷箱内的冷冻水流经电动双向开关阀V6和冷冻水泵后返回冷却机组的蒸发器,一部分流经第一电动调节阀VT1和分水器,为空调机组供应冷冻水,空调机组冷冻水的回水流经集水器、冷冻水泵后返回冷水机组的蒸发器;其中,第一电动调节阀VT1和第二电动双向调节阀VT2的流量根据空调机组的供冷量需求进行调节。Through the above technical solution, during the off-peak electricity price period, the refrigeration host is executed in the simultaneous cooling and cold storage mode. At this time, the chilled water at the outlet of the evaporator of the chiller flows through the first electric switch valve V1, and a part of it flows through the second electric two-way regulating valve VT2 and then flows into the phase change cold storage tank, cooling and solidifying the phase change material in the phase change cold storage module, and storing the cold in the phase change material. The chilled water in the phase change cold storage tank flows through the electric two-way switch valve V6 and the chilled water pump and then returns to the evaporator of the cooling unit, and a part of it flows through the first electric regulating valve VT1 and the water distributor to supply chilled water to the air-conditioning unit. The return water of the chilled water of the air-conditioning unit flows through the water collector and the chilled water pump and then returns to the evaporator of the chiller; wherein, the flow of the first electric regulating valve VT1 and the second electric two-way regulating valve VT2 is adjusted according to the cooling demand of the air-conditioning unit.
综上所述,本发明方法能够灵活调度的具体运行模式如下表所示:In summary, the specific operation modes that can be flexibly scheduled by the method of the present invention are shown in the following table:
表一Table 1
本领域普通技术人员可以理解:实现上述实施例的全部或部分步骤可以通过程序指令相关的硬件来完成,前述的程序可以存储于一计算机可读取存储介质中,该程序在执行时,执行包括上述方法实施例的步骤;而前述的存储介质包括:ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above-mentioned method embodiment; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk, etc. Various media that can store program codes.
对本领域的技术人员来说,可根据以上描述的技术方案以及构思,做出其它各种相应的改变以及形变,而所有的这些改变以及形变都应该属于本发明权利要求的保护范围之内。For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the present invention.
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