CN204115130U - A kind of phase change energy storage air conditioning system - Google Patents
A kind of phase change energy storage air conditioning system Download PDFInfo
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- CN204115130U CN204115130U CN201420586440.5U CN201420586440U CN204115130U CN 204115130 U CN204115130 U CN 204115130U CN 201420586440 U CN201420586440 U CN 201420586440U CN 204115130 U CN204115130 U CN 204115130U
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Abstract
The utility model relates to a kind of phase change energy storage air conditioning system, its structure comprises the refrigeration host computer connected successively by chilled water pipeline, end load and chilled water circulating pump group, refrigeration host computer includes condenser and evaporimeter, also comprise the phase change energy storage apparatus be arranged in the chilled water circulatory system, phase change energy storage apparatus comprises cold-storage groove, variable frequency pump and several motor-driven valves, multiple cold-storage can be realized by the opening and closing controlling several motor-driven valves, let cool flexible transformation between pattern, refrigeration host computer is made to remain on best Energy Efficiency Ratio operation, reach optimum energy-saving effect, " peak load shifting " performance is made to obtain optimization, and the most stable chilled water leaving water temperature can be obtained, improve refrigeration performance, meanwhile, refrigeration host computer capacity can also be expanded, significantly can reduce overall installed capacity and the power supply unit of system, save huge installation fee and use, in addition, this phase change energy storage air conditioning system architecture is simple, and shared space is less, and application more for convenience.
Description
Technical field
The invention relates to a kind of energy-storage air conditioner system, particularly relates to a kind of phase change energy storage air conditioning system adopting phase-change material to carry out cold-storage, let cool.
Background technology
At present, because air-conditioning system power load increases and peak of power consumption overlap day by day, cause network load uneven, cause the huge waste of electric energy when electricity shortage and low power consumption when peak of power consumption.For solving the problem, also for reaching the energy-saving effect of " peak load shifting ", air-conditioner energy-accumulation technology is rapidly developed, and namely by storing in the mode of cold at low power consumption phase electric power, is put in air-conditioning system by the cold of savings in power supply peak period again.
Traditional air-conditioner energy-accumulation technology many employings ice conserve cold or water cold storage, because ice conserve cold main frame need run at low temperatures, efficiency is lower, and system architecture is complicated and investment is comparatively large, and its application has great limitation; And for water cold storage, owing to just make use of the sensible heat of water, storage density of cold is low, and loss of refrigeration capacity is comparatively large, lower to the utilization rate of cold storage capacity, also there is system equipment and to take up room larger shortcoming.Because phase-change material has unique latent heat performance, a small amount of material can store a large amount of colds, in reduction energy consumption, reduce that air conditioner load, cold-storage are energy-conservation, there is very large advantage in simplied system structure etc., it has broad application prospects in air-conditioner energy-accumulation field, therefore, phase-changing energy-storing is more and more studied and is used in recent years.Such as Chinese patent CN202747502U discloses a kind of cooling water system based on phase change material cool storage, the phase-change material adopted in this system is gas-liquid phase transition material, gas-liquid phase transition material Volume Changes in phase transition process is very large, and then need the cold-storage groove adopting large volume, application is inconvenience extremely, the energy storage density of gas-liquid phase transition material is relatively not high simultaneously, transition temperature range is also relatively little, and only when the phase transition temperature of outdoor wet-bulb temperature lower than gas-liquid phase transition material, cold-storage groove can cold-storage, these also have significant limitation to the extensive use of gas-liquid phase transition material, cold-storage groove in this system carries out cold-storage to the cooling water from the outflow in cooling tower, because the temperature of cooling tower inner cooling water is very large by externally temperature influence, when the temperature of the cooling water flowed out in cooling tower is higher, the cold storage capacity of cold-storage groove is less, thus cause when cold-storage groove lets cool to promote the refrigeration of whole system, operational efficiency, energy-conservation etc. in effect little, in addition, the cold-storage of this system and to let cool pattern comparatively single, can not according to the actual requirements flexibly system for varying operational mode to reach best operational efficiency and best energy-saving effect, thus the performance of optimized " peak load shifting " can not be realized.
Therefore, for existing phase change energy storage air conditioning system deficiency and make improvements significant.
Summary of the invention
The object of the invention is avoid above-mentioned weak point of the prior art and provide a kind of phase change energy storage air conditioning system,
This phase change energy storage air conditioning system cold storage capacity is large, dynamic performance of ice storage does not affect by outer atmospheric temperature, and multiple cold-storage, let cool flexible transformation between pattern, can effectively adjust refrigeration host computer load, make refrigeration host computer remain on best Energy Efficiency Ratio operation, reach optimum energy-saving effect, make " peak load shifting " performance reach optimization, and the most stable chilled water leaving water temperature can be obtained, improve refrigeration performance; Meanwhile, this phase change energy storage air conditioning system can also expand refrigeration host computer capacity, to tackle the emergency situations that end load sharply increases, and significantly can reduce overall installed capacity and the power supply unit of system, saves huge installation fee and uses; In addition, this phase change energy storage air conditioning system architecture is simple, and shared space is little, and application more for convenience.
The object of the invention is achieved through the following technical solutions:
Provide a kind of phase change energy storage air conditioning system, comprise cooling water recirculation system and the chilled water circulatory system, cooling water recirculation system comprises the cooling tower connected successively by cooling water pipeline, cooling water circulating pump group and refrigeration host computer, the chilled water circulatory system comprises the refrigeration host computer connected successively by chilled water pipeline, end load and chilled water circulating pump group, refrigeration host computer includes condenser and evaporimeter, the water inlet of condenser connects the delivery port of cooling water circulating pump group, the delivery port of condenser connects the water inlet of cooling tower, the delivery port of evaporimeter connects the water inlet of end load, the water inlet of evaporimeter connects the delivery port of chilled water circulating pump group, the first motor-driven valve is provided with between evaporimeter and chilled water circulating pump group, the second motor-driven valve is provided with between evaporimeter and end load, phase change energy storage air conditioning system also comprises phase change energy storage apparatus, phase change energy storage apparatus comprises cold-storage groove, variable frequency pump, 3rd motor-driven valve, 4th motor-driven valve, 5th motor-driven valve and six motor-driven valves, the water inlet of cold-storage groove is connected to the chilled water pipeline between evaporimeter and the second motor-driven valve through the 3rd motor-driven valve, the water inlet of cold-storage groove is connected to the chilled water pipeline between chilled water circulating pump group and the first motor-driven valve through the 4th motor-driven valve, the delivery port of cold-storage groove is successively through variable frequency pump, 5th motor-driven valve is connected to the chilled water pipeline between end load and the second motor-driven valve, the delivery port of cold-storage groove is successively through variable frequency pump, 6th motor-driven valve is connected to the chilled water pipeline between evaporimeter and the second motor-driven valve, cold-storage groove is built-in with solid-liquid phase change material.
Wherein, described phase change energy storage apparatus also includes the check-valves for preventing current from refluxing, and check-valves is arranged between cold-storage groove and variable frequency pump.
Wherein, described phase change energy storage apparatus also includes flow divider, 3rd motor-driven valve and the 4th motor-driven valve are all connected to the water inlet of cold-storage groove by flow divider, the first delivery port of flow divider connects the water inlet of cold-storage groove, and the second delivery port of flow divider connects the delivery port of variable frequency pump.
Wherein, described flow divider is electric butterfly valve.
Wherein, the first motor-driven valve, the second motor-driven valve, the 3rd motor-driven valve, the 4th motor-driven valve, the 5th motor-driven valve and the 6th motor-driven valve are electric butterfly valve.
Wherein, described refrigeration host computer is provided with two, and two described refrigeration host computers are for being arranged in parallel, and two described refrigeration host computers are spiral handpiece Water Chilling Units.
Wherein, described cooling water circulating pump group comprises the first cooling water circulating pump, the second cooling water circulating pump and cooling water circulating pump for subsequent use; Described chilled water circulating pump group comprises the first chilled water circulating pump, the second chilled water circulating pump and chilled water circulating pump for subsequent use.
Wherein, phase change energy storage air conditioning system also includes pressure difference bypass apparatus, the water inlet of pressure difference bypass apparatus is connected to the chilled water pipeline of the water inlet near end load, and the delivery port of pressure difference bypass apparatus is connected to the chilled water pipeline of the delivery port near end load.
Wherein, phase change energy storage air conditioning system also comprises expansion tank, the expansion tube of expansion tank connects the chilled water pipeline of the water inlet near chilled water circulating pump group, and expansion tube is provided with pressure-reducing valve, and the expansion tube between pressure-reducing valve and chilled water pipeline is also connected with water supply line.
Wherein, described cooling tower is square cross flow cooling tower.
The beneficial effect of the invention:
A kind of phase change energy storage air conditioning system of the invention, by arranging phase change energy storage apparatus in the chilled water circulatory system, its phase-changing energy-storing performance is not by the impact of ambient temperature, cold-storage is carried out in the low power consumption phase, let cool separately in peak times of power consumption or combine with refrigeration host computer and let cool, reach the energy-saving effect of " peak load shifting ".By controlling the first motor-driven valve, second motor-driven valve, 3rd motor-driven valve, 4th motor-driven valve, opening or closing of 5th motor-driven valve and the 6th motor-driven valve, enable phase change energy storage air conditioning system in multiple cold-storage pattern, let cool between pattern and change flexibly, adaptability is good, different actual conditions needs can be met, " peak load shifting " performance is made to reach optimization, and regulate letting cool speed or converting letting cool of air-conditioning system of cold-storage groove by variable frequency pump, cold-storage pattern adjusts the load of refrigeration host computer, run under the state making the refrigeration host computer time as much as possible remain on best Energy Efficiency Ratio, reach optimum energy-saving effect, also refrigeration host computer service efficiency and service life is improved, simultaneously, also the most stable chilled water leaving water temperature can be obtained, improve refrigeration performance, in addition, the various pattern that lets cool can expand refrigeration host computer capacity, to tackle the emergency situations that end load sharply increases, and significantly can reduce overall installed capacity and the power supply unit of system, saves huge installation fee and uses.Because solid-liquid phase change material is built in cold-storage groove, the cold storage capacity of cold-storage groove is increased, cold-storage efficiency is high, and the cold-storage groove of different phase transition temperature can be adopted as required, make phase change cold-storage device strong adaptability, become cold-storage device takes up room little simultaneously, and cold-storage groove can be embedded in underground does not even need the occupying volume external space, and application more for convenience.
Accompanying drawing is utilized to be described further innovation and creation, but the embodiment in accompanying drawing does not form any restriction to the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the following drawings.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of phase change energy storage air conditioning system of the invention.
Fig. 2 is that the cold-storage groove cold-storage of the change energy-storage air conditioner system of the invention adds end load and lets cool pattern or cold-storage groove and let cool and add the structural representation that end load lets cool pattern.
Fig. 3 is the structural representation that the series connection of the change energy-storage air conditioner system of the invention lets cool pattern.
Fig. 4 is the structural representation of the independent cold-storage pattern of cold-storage groove of the change energy-storage air conditioner system of the invention.
Fig. 5 is the structural representation that the refrigeration host computer of the change energy-storage air conditioner system of the invention lets cool separately pattern.
Fig. 6 is the structural representation that the cold-storage groove of the change energy-storage air conditioner system of the invention lets cool separately pattern.
Fig. 7 is the structural representation that the parallel connection of the change energy-storage air conditioner system of the invention lets cool pattern.
Reference numeral:
1-cooling tower,
2-cooling water circulating pump group, 21-first cooling water circulating pump, 22-second cooling water circulating pump, 23-cooling water circulating pump for subsequent use,
3-refrigeration host computer, 31-condenser, 32-evaporimeter,
4-end load,
5-chilled water circulating pump group, 51-first chilled water circulating pump, 52-second chilled water circulating pump, 53-chilled water circulating pump for subsequent use,
6-phase change energy storage apparatus, 61-first motor-driven valve, 62-second motor-driven valve, 63-the 3rd motor-driven valve, 64-the 4th motor-driven valve, 65-the 5th motor-driven valve, 66-the 6th motor-driven valve, 67-flow divider, 68-cold-storage groove, 69-check-valves, 60-variable frequency pump,
7-pressure difference bypass apparatus,
8-expansion tank, 81-expansion tube, 82-pressure-reducing valve,
9-comprehensive water treatment equipment.
Detailed description of the invention
With the following Examples the invention is further described.
A kind of phase change energy storage air conditioning system of the invention, as shown in Figure 1, comprise cooling water recirculation system and the chilled water circulatory system, wherein, cooling water recirculation system comprises the cooling tower 1, cooling water circulating pump group 2 and the refrigeration host computer 3 that are connected successively by cooling water pipeline, and the chilled water circulatory system comprises the refrigeration host computer 3, end load 4 and the chilled water circulating pump group 5 that are connected successively by chilled water pipeline.
In cooling water recirculation system, for improving the energy saving of system, preferably, described cooling tower 1 is square cross flow cooling tower, due to square cross flow cooling tower, to have hydraulic pressure low, windage is little, noise is low, the feature such as occupy little space, it is cooling tower optimal selection in cooling water recirculation system, simultaneously, for ensureing the stable operation of cooling water recirculation system, preferably, described cooling water circulating pump group 2 comprises the first cooling water circulating pump 21, second cooling water circulating pump 22 and cooling water circulating pump for subsequent use 23, first cooling water circulating pump 21 and the alternating individual use of the second cooling water circulating pump 22, the convenient maintenance to the pump housing, also the service life of the single pump housing is improved, cooling water circulating pump 23 for subsequent use is when all there is exception in the first cooling water circulating pump 21 and the second cooling water circulating pump 22 simultaneously, start the pump housing for subsequent use and still can ensure that whole cooling water recirculation system is normally run, and then ensure the stability that whole air-conditioning system is run.
In the chilled water circulatory system, for ensureing the normal of the chilled water circulatory system, stable operation, preferably, described chilled water circulating pump group 5 comprises the first chilled water circulating pump 51, second chilled water circulating pump 52 and chilled water circulating pump for subsequent use 53, first chilled water circulating pump 51 and the alternating individual use of the second chilled water circulating pump 52, improve the service life of the single pump housing, also the convenient maintenance to the single pump housing, and the first chilled water circulating pump 51 and the second chilled water circulating pump 52 all break down can not normally run time, start chilled water circulating pump 53 for subsequent use to ensure that the whole chilled water circulatory system is normally run.
In whole phase change energy storage air conditioning system, refrigeration host computer 3 plays function served as bridge and cooling water recirculation system and the chilled water circulatory system is coupled together, refrigeration host computer 3 includes condenser 31 and the evaporimeter 32 of refrigerant pipe connection, the water inlet of condenser 31 connects the delivery port of cooling water circulating pump group 2, the delivery port of condenser 31 connects the water inlet of cooling tower 1, the delivery port of evaporimeter 32 connects the water inlet of end load 4, and the water inlet of evaporimeter 32 connects the delivery port of chilled water circulating pump group 5.The low-temperature cooling water flowed out from cooling tower 1 flows into and to absorb heat after condenser 31 and become high-temperature cooling water and flow out, and high-temperature cooling water is back to cooling tower 1 to carry out heat exchange again and become low-temperature cooling water and then form cooling water recirculation system with air; The high temperature chilled water refrigerant flowed into after evaporimeter 32 and in it flowed out from end load 4 carries out heat exchange and forms cryogenic freezing water and flow out, cryogenic freezing water flows into end load 4 again to carry out heat exchange and becomes high temperature chilled water, and high temperature chilled water is back to evaporimeter 32 again and forms the chilled water circulatory system.
For realizing the energy-saving effect of " peak load shifting ", phase change energy storage air conditioning system in the present embodiment also comprises phase change energy storage apparatus 6, phase change energy storage apparatus 6 comprises cold-storage groove 68 further, variable frequency pump 60, first motor-driven valve 61, second motor-driven valve 62, 3rd motor-driven valve 63, 4th motor-driven valve 64, 5th motor-driven valve 65 and the 6th motor-driven valve 66, wherein, first motor-driven valve 61 is arranged between evaporimeter 32 and chilled water circulating pump group 5, second motor-driven valve 62 is arranged between evaporimeter 32 and end load 4, the water inlet of cold-storage groove 68 is connected to the chilled water pipeline between evaporimeter 32 and the second motor-driven valve 62 through the 3rd motor-driven valve 63, the water inlet of cold-storage groove 68 is also connected to the chilled water pipeline between chilled water circulating pump group 5 and the first motor-driven valve 61 through the 4th motor-driven valve 64, the delivery port of cold-storage groove 68 is successively through variable frequency pump 60, 5th motor-driven valve 65 is connected to the chilled water pipeline between end load 4 and the second motor-driven valve 62, the delivery port of cold-storage groove 68 is successively through variable frequency pump 60, 6th motor-driven valve 66 is connected to the chilled water pipeline between evaporimeter 32 and the second motor-driven valve 62.According to actual needs, the multiple cold-storage of phase change energy storage air conditioning system can be realized by controlling the open and close of said electric valve, letting cool operational mode, as shown in Figures 2 to 7:
As shown in Figure 2, night low ebb electricity price and end load 4 need a little cooling time, air-conditioning system operation cold-storage groove cold-storage adds end load and lets cool pattern, this pattern need close the second motor-driven valve 62, the 4th motor-driven valve 64 and the 6th motor-driven valve 66, need open the first motor-driven valve 61, the 3rd motor-driven valve 63, the 5th motor-driven valve 65, variable frequency pump 60 and chilled water circulating pump group 5.The cryogenic freezing water flowed out from evaporimeter 32 flows into cold-storage groove 68 through the 3rd motor-driven valve 63, cold-storage groove 68 absorbs cold to carry out cold-storage and the cryogenic freezing water flowed through in it is become middle temperature chilled water, middle temperature chilled water flows through variable frequency pump 60 more successively, 5th motor-driven valve 65 reaches end load 4, middle temperature chilled water and end load 4 are carried out heat exchange and are become high temperature chilled water, high temperature chilled water flows through chilled water circulating pump group 5 successively, first motor-driven valve 61 is got back to evaporimeter 32 and is again carried out heat exchange with it and becomes cryogenic freezing water, and then form cold-storage groove cold-storage and add end load and let cool pattern.Because end load 4 needs a little cooling, cold unnecessary for refrigeration host computer stores by this pattern, uses for during peak of power consumption, reaches energy-conservation effect, can also meet users on diversity simultaneously.
As shown in Figure 2, by day during peak of power consumption, indirectly can share part system load for making cold-storage groove 68 and refrigeration host computer 3 can be made to be in low energy consumption state, and then reach energy-saving effect, air-conditioning system is run cold-storage groove and is let cool and add end load and let cool pattern, this pattern need close the second motor-driven valve 62, the 4th motor-driven valve 64 and the 6th motor-driven valve 66, need open the first motor-driven valve 61, the 3rd motor-driven valve 63, the 5th motor-driven valve 65, variable frequency pump 60 and chilled water circulating pump group 5.From evaporimeter 32 flows out, warm chilled water flows into cold-storage groove 68 through the 3rd motor-driven valve 63, cold-storage groove 68 released cold quantity also becomes cryogenic freezing water by flowing through warm chilled water in it, cryogenic freezing water flows through variable frequency pump 60 more successively, the 5th motor-driven valve 65 reaches end load 4, middle temperature chilled water and end load 4 are carried out heat exchange and are become high temperature chilled water, high temperature chilled water flows through chilled water circulating pump group 5, first motor-driven valve 61 successively and gets back to evaporimeter 32 and again carry out heat exchange with it and become middle temperature chilled water, and cold-storage groove lets cool and adds end load and let cool pattern.Make it become cryogenic freezing water because warm chilled water in flowing out from evaporimeter 32 can cool by this pattern further, not only ensure refrigeration, and reduce the load of refrigeration host computer 3, and then reduce the energy consumption of refrigeration host computer 3, reach energy-saving effect.
As shown in Figure 3, by day during peak of power consumption, for make cold-storage groove 68 can indirectly share part system load and refrigeration host computer 3 more time can be made to be in best Energy Efficiency Ratio state under work, reach energy-saving effect, air-conditioning system is run series connection and is let cool pattern, this pattern need close the first motor-driven valve 61, the 3rd motor-driven valve 63 and the 5th motor-driven valve 65, need open the second motor-driven valve 62, the 4th motor-driven valve 64, the 6th motor-driven valve 66, variable frequency pump 60 and chilled water circulating pump group 5.The cryogenic freezing water flowed out from evaporimeter 32 reaches end load 4 through the second motor-driven valve 62, cryogenic freezing water carries out heat exchange in end load 4 with it and becomes high temperature chilled water, high temperature chilled water flows through chilled water circulating pump group 5 successively, the 4th motor-driven valve 64 flows into cold-storage groove 68, the high temperature chilled water flowed through in it is become middle temperature chilled water by cold-storage groove 68 released cold quantity, middle temperature chilled water flows through variable frequency pump 60 more successively, the 6th motor-driven valve 66 is back to evaporimeter 32 and carry out heat exchange with it and become cryogenic freezing water, forms series connection and lets cool circulation pattern.Because this pattern can by the first cooling further of high temperature chilled water, the load of refrigeration host computer 3 is made to be unlikely to excessive, play the effect of balance refrigeration load on host computers, and the load letting cool speed and then further adjustment refrigeration host computer 3 of cold-storage groove 68 is regulated by variable frequency pump 60, work under the state making refrigeration host computer 3 remain on best Energy Efficiency Ratio as much as possible, reach maximum energy-saving emission reduction effect.
As shown in Figure 4, night low ebb electricity price and end load 4 do not need cooling time, air-conditioning system runs the independent cold-storage pattern of cold-storage groove, this pattern need close the first motor-driven valve 61, second motor-driven valve 62, the 4th motor-driven valve 64, the 5th motor-driven valve 65 and chilled water circulating pump group 5, need open the 3rd motor-driven valve 63, the 6th motor-driven valve 66 and variable frequency pump 60.Cryogenic freezing water out flows through the 3rd motor-driven valve 63 from evaporimeter 32 and arrives cold-storage groove 68, phase-change material in cold-storage groove 68 starts the cold solidified cryogenic freezing water and stores, and cryogenic freezing water becomes middle temperature chilled water successively through variable frequency pump 60, 6th motor-driven valve 66 is back to evaporimeter 32 again to carry out heat exchange and becomes cryogenic freezing water with it, and then form the independent cold-storage cycle of modes of cold-storage groove, electric energy directly stores in the mode of cold by this pattern, by the time during peak of power consumption, the cold of storage is discharged the energy-conservation object realizing " peak load shifting ".
As shown in Figure 5, phase change energy storage air conditioning system in the present embodiment can also realize common cooling mode, namely refrigeration host computer 3 lets cool pattern separately, this pattern need close the 3rd motor-driven valve 63, the 4th motor-driven valve 64, the 5th motor-driven valve 65, the 6th motor-driven valve 66 and variable frequency pump 60, need open the first motor-driven valve 61, second motor-driven valve 62 and chilled water circulating pump group 5.The cryogenic freezing current flowed out from evaporimeter 32 reach end load 4 through the second motor-driven valve 62, cryogenic freezing water and end load 4 are carried out heat exchange and are become high temperature chilled water, high temperature chilled water flows through chilled water circulating pump group 5, first motor-driven valve 61 successively and gets back to and again carry out heat exchange with it to evaporimeter 32 and become cryogenic freezing water, and then forms refrigeration host computer and let cool pattern separately.
As shown in Figure 6, by day during peak of power consumption, the electrical equipment of closing refrigeration host computer 3 and matching, cold-storage groove 68 directly replaces refrigeration host computer 3 to end load 4 cooling, air-conditioning system is run cold-storage groove 68 and is let cool pattern separately, this pattern need close the first motor-driven valve 61, second motor-driven valve 62, the 3rd motor-driven valve 63 and the 6th motor-driven valve 66, need open the 4th motor-driven valve 64, the 5th motor-driven valve 65, variable frequency pump 60 and chilled water circulating pump group 5.The high temperature chilled water flowed out from end load 4 flows through chilled water circulating pump group 5 successively, 4th motor-driven valve 64 flows into cold-storage groove 68, phase-change material in cold-storage groove 68 starts to melt, and constant absorption amount of heat, make cold-storage groove 68 continued down, and then make high temperature chilled water become cryogenic freezing water to flow out from cold-storage groove 68, namely be that the cold of storage is discharged in air-conditioning system by cold-storage groove 68, cryogenic freezing water flows through variable frequency pump 60 more successively, 5th motor-driven valve 65 reaches end load 4, and carry out heat exchange with it and become high temperature chilled water, form cold-storage groove 68 and let cool pattern separately, this pattern directly can reach the energy-conservation object of " peak load shifting ".
As shown in Figure 7, situation about sharply increasing during peak of power consumption or for end load in the short time 4 by day, cold-storage groove 68 and refrigeration host computer 3 can air conditionings, air-conditioning system is run parallel connection and is let cool pattern, this pattern need close the 3rd motor-driven valve 63 and the 6th motor-driven valve 66, need open the first motor-driven valve 61, second motor-driven valve 62, the 4th motor-driven valve 64, the 5th motor-driven valve 65, variable frequency pump 60 and chilled water circulating pump group 5.The high temperature chilled water flow flowed out from end load 4 flows through the first motor-driven valve 61 through chilled water circulating pump group 5 rear portion and is back to and carries out heat exchange in evaporimeter 32 and with it and become cryogenic freezing water, another part high temperature chilled water flows into cold-storage groove 68 through the 4th motor-driven valve 64, cold-storage groove 68 releases cold makes high temperature chilled water become middle temperature chilled water, and middle temperature chilled water flows through variable frequency pump 60 successively
,5th motor-driven valve 65 with to flow out from evaporimeter 32, and converge mixing through the cryogenic freezing water of the second motor-driven valve 62, mixed chilled water flow terminad load 4, and carry out heat exchange with it and become high temperature chilled water, form parallel connection and let cool circulation pattern, in this pattern, cold-storage groove 68 adds refrigeration host computer 3 capacity, reduce the overall installed capacity of air-conditioning system, a large amount of installation fee can be saved use, opening degree simultaneously by controlling said electric valve can regulate mixed chilled water temperature, to meet needed for end load 4 or to obtain stable chilled water cooling temperature, ensure refrigeration.
Above-mentioned multiple cold-storage, let cool between pattern and can change flexibly, and transition process is simple and convenient, the needs of different situations can not only be met, " peak load shifting " performance is made to reach optimization, and regulate letting cool speed or converting letting cool of air-conditioning system of cold-storage groove 68 by variable frequency pump 60, cold-storage pattern adjusts the load of refrigeration host computer 3, run under the state making refrigeration host computer 3 time as much as possible remain on best Energy Efficiency Ratio, reach optimum energy-saving effect, also refrigeration host computer 3 service efficiency and service life is improved, simultaneously, coordinate the opening degree of said electric valve also can obtain the most stable chilled water leaving water temperature and be adjusted to the chilled water leaving water temperature needed for end load 4, improve refrigeration performance.
Because phase change energy storage apparatus 6 is arranged in the chilled water circulatory system, the dynamic performance of ice storage of cold-storage groove 68, not by the impact of ambient temperature, can keep good energy storage effect equally when ambient temperature is higher.
Because solid-liquid phase change material is built in cold-storage groove 68, the cold storage capacity of cold-storage groove 68 is increased, cold-storage efficiency is high, and the cold-storage groove 68 of different phase transition temperature can be adopted as required, make phase change cold-storage device strong adaptability, become cold-storage device takes up room little simultaneously, and cold-storage groove 68 can be buried in underground does not even need special exceptional space, and application more for convenience.
Above-mentioned multiple cold-storage, let cool between pattern transformation time, for preventing current from refluxing, between cold-storage groove 68 and variable frequency pump 60, be provided with check-valves 69.
For the leaving water temperature of cold-storage groove 68 can be regulated, described phase change energy storage apparatus 6 also includes flow divider 67,3rd motor-driven valve 63 and the 4th motor-driven valve 64 are all connected to the water inlet of cold-storage groove 68 by flow divider 67, first delivery port of flow divider 67 connects the water inlet of cold-storage groove 68, and the second delivery port of flow divider 67 connects the delivery port of variable frequency pump 60.At above-mentioned multiple cold-storage, let cool in mode operation, the water inlet of flow divider 67 and the first water outlet are in open mode, but only have run that cold-storage adds that end load 4 lets cool pattern, series connection lets cool pattern and parallel connection when letting cool pattern, second water outlet eloquence of flow divider 67 is in open mode, flow divider 67, except the inflow temperature playing adjustment cold-storage groove 68, also plays the effect of equalizing pressure.For ease of realizing automatic control, described flow divider 67 is electric butterfly valve.
For ease of above-mentioned multiple cold-storage, let cool between pattern and can change flexibly, the first motor-driven valve 61, second motor-driven valve 62, the 3rd motor-driven valve 63, the 4th motor-driven valve 64, the 5th motor-driven valve 65 and the 6th motor-driven valve 66 are electric butterfly valve, improve automatic horizontal.
For improving heat exchange efficiency and increasing cryogenic freezing discharge, also for the ease of maintenance, described refrigeration host computer 3 is provided with two, two described refrigeration host computers 3 are for being arranged in parallel, two described refrigeration host computers 3 are used alternatingly, effectively can extend the service life of separate unit refrigeration host computer 3, two described refrigeration host computers 3 are spiral handpiece Water Chilling Units.Certainly, two described refrigeration host computers 3 also can be arranged in series.
Phase change energy storage air conditioning system in the present embodiment also includes pressure difference bypass apparatus 7, the water inlet of pressure difference bypass apparatus 7 is connected to the chilled water pipeline of the water inlet near end load 4, and the delivery port of pressure difference bypass apparatus 7 is connected to the chilled water pipeline of the delivery port near end load 4.Pressure difference bypass apparatus 7 ensures the stability of air-conditioning system pressure reduction by bypass backwater, ensures that system equipment is not damaged.
Phase change energy storage air conditioning system in the present embodiment also includes and also comprises expansion tank 8, the expansion tube 81 of expansion tank 8 connects the chilled water pipeline of the water inlet near chilled water circulating pump group 5, expansion tube 81 is provided with pressure-reducing valve 82, and the expansion tube 81 between pressure-reducing valve 82 and chilled water pipeline is also connected with water supply line.When chilled water return water temperature causes more greatly volume to increase, for ensureing system pressure difference balance, the volume that chilled water backwater increases proceeds to expansion tank 8 by expansion tube 81, and pressure-reducing valve 82 prevents the water volume proceeding to expansion tank 8 to be again back to chilled water pipeline; When chilled water return water temperature is lower cause volume-diminished time, be ensure system pressure difference balance, water supply line starts to carry out moisturizing to chilled water pipeline.
In the present embodiment, for ensureing to enter the cleannes of the water quality of refrigeration host computer 3, at the water inlet of evaporimeter 32 and be provided with comprehensive water treatment equipment 9 at the water inlet of condenser 31.
Finally should be noted that; above embodiment is only in order to illustrate the technical scheme of the invention; but not the restriction to the invention protection domain; although done to explain to the invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to the technical scheme of the invention or equivalent replacement, and not depart from essence and the scope of the invention technical scheme.
Claims (10)
1. a phase change energy storage air conditioning system, comprise cooling water recirculation system and the chilled water circulatory system, cooling water recirculation system comprises the cooling tower connected successively by cooling water pipeline, cooling water circulating pump group and refrigeration host computer, the chilled water circulatory system comprises the refrigeration host computer connected successively by chilled water pipeline, end load and chilled water circulating pump group, refrigeration host computer includes condenser and evaporimeter, the water inlet of condenser connects the delivery port of cooling water circulating pump group, the delivery port of condenser connects the water inlet of cooling tower, the delivery port of evaporimeter connects the water inlet of end load, the water inlet of evaporimeter connects the delivery port of chilled water circulating pump group, it is characterized in that: between evaporimeter and chilled water circulating pump group, be provided with the first motor-driven valve, the second motor-driven valve is provided with between evaporimeter and end load, this phase change energy storage air conditioning system also comprises phase change energy storage apparatus, phase change energy storage apparatus comprises cold-storage groove, variable frequency pump, 3rd motor-driven valve, 4th motor-driven valve, 5th motor-driven valve and six motor-driven valves, the water inlet of cold-storage groove is connected to the chilled water pipeline between evaporimeter and the second motor-driven valve through the 3rd motor-driven valve, the water inlet of cold-storage groove is connected to the chilled water pipeline between chilled water circulating pump group and the first motor-driven valve through the 4th motor-driven valve, the delivery port of cold-storage groove is successively through variable frequency pump, 5th motor-driven valve is connected to the chilled water pipeline between end load and the second motor-driven valve, the delivery port of cold-storage groove is successively through variable frequency pump, 6th motor-driven valve is connected to the chilled water pipeline between evaporimeter and the second motor-driven valve, cold-storage groove is built-in with solid-liquid phase change material.
2. a kind of phase change energy storage air conditioning system according to claim 1, is characterized in that: described phase change energy storage apparatus also includes the check-valves for preventing current from refluxing, and check-valves is arranged between cold-storage groove and variable frequency pump.
3. a kind of phase change energy storage air conditioning system according to claim 1, it is characterized in that: described phase change energy storage apparatus also includes flow divider, 3rd motor-driven valve and the 4th motor-driven valve are all connected to the water inlet of cold-storage groove by flow divider, first delivery port of flow divider connects the water inlet of cold-storage groove, and the second delivery port of flow divider connects the delivery port of variable frequency pump.
4. a kind of phase change energy storage air conditioning system according to claim 3, is characterized in that: described flow divider is electric butterfly valve.
5. a kind of phase change energy storage air conditioning system according to claim 1, is characterized in that: the first motor-driven valve, the second motor-driven valve, the 3rd motor-driven valve, the 4th motor-driven valve, the 5th motor-driven valve and the 6th motor-driven valve are electric butterfly valve.
6. a kind of phase change energy storage air conditioning system according to claim 1, is characterized in that: described refrigeration host computer is provided with two, and two described refrigeration host computers are for being arranged in parallel, and two described refrigeration host computers are spiral handpiece Water Chilling Units.
7. a kind of phase change energy storage air conditioning system according to claim 1, is characterized in that: described cooling water circulating pump group comprises the first cooling water circulating pump, the second cooling water circulating pump and cooling water circulating pump for subsequent use; Described chilled water circulating pump group comprises the first chilled water circulating pump, the second chilled water circulating pump and chilled water circulating pump for subsequent use.
8. a kind of phase change energy storage air conditioning system according to claim 1, it is characterized in that: this phase change energy storage air conditioning system also includes pressure difference bypass apparatus, the water inlet of pressure difference bypass apparatus is connected to the chilled water pipeline of the water inlet near end load, and the delivery port of pressure difference bypass apparatus is connected to the chilled water pipeline of the delivery port near end load.
9. a kind of phase change energy storage air conditioning system according to claim 1, it is characterized in that: this phase change energy storage air conditioning system also comprises expansion tank, the expansion tube of expansion tank connects the chilled water pipeline of the water inlet near chilled water circulating pump group, expansion tube is provided with pressure-reducing valve, and the expansion tube between pressure-reducing valve and chilled water pipeline is also connected with water supply line.
10. a kind of phase change energy storage air conditioning system according to claim 1, is characterized in that: described cooling tower is square cross flow cooling tower.
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| CN201420586440.5U CN204115130U (en) | 2014-10-11 | 2014-10-11 | A kind of phase change energy storage air conditioning system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105841279A (en) * | 2016-05-30 | 2016-08-10 | 广州泰阳能源科技有限公司 | Cooling capacity gradient utilization water cold accumulation disaster recovery, peak shaving and load shifting system |
| CN116222020A (en) * | 2023-03-07 | 2023-06-06 | 山东大学 | Phase change cold accumulation system based on transcritical carbon dioxide absorption refrigeration cycle |
-
2014
- 2014-10-11 CN CN201420586440.5U patent/CN204115130U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105841279A (en) * | 2016-05-30 | 2016-08-10 | 广州泰阳能源科技有限公司 | Cooling capacity gradient utilization water cold accumulation disaster recovery, peak shaving and load shifting system |
| CN105841279B (en) * | 2016-05-30 | 2018-07-06 | 广州泰阳能源科技有限公司 | A kind of cold cascade utilization water cold storage disaster tolerance and peak load shifting system |
| CN116222020A (en) * | 2023-03-07 | 2023-06-06 | 山东大学 | Phase change cold accumulation system based on transcritical carbon dioxide absorption refrigeration cycle |
| CN116222020B (en) * | 2023-03-07 | 2024-01-26 | 山东大学 | Phase change cold accumulation system based on transcritical carbon dioxide absorption refrigeration cycle |
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