CN100470152C - Dynamic high temperature cool accumulation air conditioner system - Google Patents
Dynamic high temperature cool accumulation air conditioner system Download PDFInfo
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- CN100470152C CN100470152C CNB2006101226725A CN200610122672A CN100470152C CN 100470152 C CN100470152 C CN 100470152C CN B2006101226725 A CNB2006101226725 A CN B2006101226725A CN 200610122672 A CN200610122672 A CN 200610122672A CN 100470152 C CN100470152 C CN 100470152C
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Abstract
The present invention relates to a dynamic cold storage air-conditioning system, specially, it is a high-temperature cold storage air-conditioning system by adopting eutectic solution as cold storage medium. It includes refrigeration system, cold storage system, cold release system and tail end system. The refrigeration output of said refrigeration system is parallel connected with cold storage system, cold release system and tail end system, its cold storage medium is an eutectic solution, said eutectic solution is sodium sulfate Na2SO4 .10H2O solution, and its cold storage mode adopts a semi-transparent film device and its system working temperature is above zero deg.C. Said invention is simple in structure and high in working efficiency and reliability.
Description
Technical field:
The present invention relates to a kind of dynamic cool storage air-conditioning system, particularly a kind of high temperature cool accumulation air conditioner system that adopts eutectic salts solution as cool storage medium.
Background technology:
At present, along with the use of air-conditioner is more and more universal, the energy consumption of air-conditioning equipment accounts for the proportion of per GDP power consumption near 30%, and the energy consumption of air conditioner cold-heat origin system accounts for 50～70% of air-conditioning total energy consumption.Because the air-conditioning power consumption mainly concentrates in the higher time interval of summer temp, night, demand then significantly reduced, thereby caused the load difference between peak of power consumption and low ebb very big, and the peak load difference of the main electrical network in the whole nation had reached 25～35% in recent years.The peak-valley difference of Zeng Jiaing brings difficulty for the peaking operation in power station year by year.2005, though the newly-increased operation generating set in the whole nation reaches 6,000 ten thousand kilowatts, total installation of generating capacity will be above 500,000,000 kilowatts, and national power supply and demand situation is still nervous, and the system of State Grid Corporation of China estimates that maximum breach is at 2,500 ten thousand kilowatts.For this reason, state plan impels electric load dsm (DSM) with economic lever, carry out the different electrovalence policy of supply of electric power peak valley, encourage the user to develop the use valley power, farthest utilize existing generating equipment, realize that " peak load shifting " and plan are annual on the basis of the previous year, transfer electrical power load 1400MW～1700MW again is to alleviate the contradiction of electrical network peak short of electricity.
Ice Thermal Storage Air-Conditioning Technology is utilized the refrigeration unit ice making in the low power consumption period exactly, cold is stored, second day peak of power consumption period, changing ice gets cold, thereby can make full use of valley electricity, stagger peak times of power consumption, the peak-valley difference that reduces to load, raising rate of load condensate.This technology can be widely used in places such as market, hotel, restaurant, office building, and along with the continuous development of ice storage technology, this technology also expands in food processing and the industries such as building, chemical industry gradually simultaneously.
The ice cold-storage has good application advantage owing to its unit mass cold storage capacity is about 17 times of water.The ice making mode of ice cold-storage can be divided into static ice making and dynamic ice-making dual mode.Static ice making mode is ice body by growth, thicken the whole process of finishing to ice-reserving stablizes, is not moved.Dynamic ice-storage then refers under the cooling effect of cold surface, during the ice sheet that takes on a certain scale it separated, again the change procedure of regelation, separation.The main mode of static ice making is the outer ice-reserving (outer ice-melt coil pipe, interior ice-melt coil pipe, serpentine coil, circular coil pipe) of coil pipe, encapsulation ice cold-storage (ice hockey, stamen core Zhe capsule formula ice hockey, slab).The main mode of dynamic ice-making is borneol landing formula, ice slurry formula, direct contact type, binary solution ice making.Ice cold-storage refrigeration machine adopts the handpiece Water Chilling Units of duplexing condition operation usually, and the associating ice storage unit can be realized ice-reserving, get 5 kinds of operational modes such as cold.Ice-chilling air conditioning system combines with big temperature difference air-supply technology usually, can realize cold air distribution.
Dynamic ice has flowability, can directly carry with pump, does not need secondary refrigerant and heat exchanger, has not only reduced the expense of system and the operating efficiency of system is improved.The ice slurry that forms in cold-storage solution simultaneously has higher energy storage density, and the unit volume storage density of cold is higher 4～6 times than chilled water.Because the cold-storage flow of solution can directly form the ice slurry behind evaporimeter, therefore, the refrigerant line length that constitutes evaporimeter can shorten, and the cold-producing medium risk of leakage can reduce.
What general cold accumulating device by ice adopted is that ethylene glycol solution is as refrigerating medium, to ice as cool storage medium.The fusing point of ice is 0 ℃, so the evaporating temperature of refrigeration unit must be lower than 0 ℃ in the ice-making process of ice-storage air-conditioning.According to thermodynamics basic law, under the situation of identical condensation temperature, the evaporating temperature of refrigeration system is low more, and the COP of its kind of refrigeration cycle is low more, also is that the merit that specific refrigerating effect consumed is big more.At present, ice-storage air-conditioning is because evaporating temperature is low, and the Energy Efficiency Ratio of unit approximately only is equivalent to 60% of the cold water unit of light water, and comprehensive Energy Efficiency Ratio is than the cold water unit of light water low 30%.
Summary of the invention:
The objective of the invention is to present situation shortcoming at existing cold accumulation air-conditioner, a kind of dynamic high temperature cool accumulation air conditioner system is provided, make chilling air conditioning system can be operated in higher temperature range, reduced the energy consumption of refrigeration unit, also overcome the parts of conventional dynamic ice-storage system complex.
The present invention, it comprises refrigeration system, cold accumulation system, releases cooling system and end system, the refrigeration output of refrigeration system and cold accumulation system, release cooling system and end system is connected in parallel, refrigeration system is connected in sequence by compressor, condenser, device for drying and filtering, expansion valve and evaporimeter.
The present invention, the cool storage medium solution in cold accumulation system is eutectic salts solution, phase transition temperature is at 5 ℃～10 ℃, and its phase transition temperature changes along with the variation of solution concentration; Circulating and release the refrigerating medium medium of being responsible for the heat migration in the cold circulation at described cold-storage is eutectic salts solution, can save middle refrigerating medium and heat exchanger, and the operation concentration stabilize.Described eutectic salts solution is sodium sulphate (Na
2SO
410H
2O) solution, the mass concentration 5～30% during its operation.
The present invention, described cold accumulation system can be by booster pump, motor-driven valve, ice machine, the cold-storage jar, reservoir and electric T-shaped valve are formed by connecting, ice machine is provided with semipermeable membrane device, highly concentrated solution outlet C was set before semipermeable membrane device, low concentration solution outlet D is set after semipermeable membrane device, low concentration solution outlet D is connected with the solution inlet port E of cold-storage jar, the cold-storage jar is provided with two taphole F and G, the second taphole G of cold-storage jar is connected with the solution inlet port of reservoir by magnetic valve, the taphole of reservoir is connected with electric T-shaped valve, and the highly concentrated solution outlet C of ice machine is connected with electric T-shaped valve by merging the back with the first taphole F of cold-storage jar after the choke valve; The described cooling system of releasing is formed by connecting by magnetic valve and heat exchange coil, and heat exchange coil places among the cold-storage jar.End system is formed by connecting by solution pump, magnetic valve and air-treatment unit.
The present invention, its cold-storage mode adopts semipermeable membrane device, by the counter osmosis under certain pressure of pellicle, regulates the concentration of eutectic salts solution, thereby salting liquid is undergone phase transition.
The present invention can be provided with concentration measuring apparatus at the rear portion of described ice machine semipermeable membrane device, and described concentration measuring apparatus is electrically connected with the motor-driven valve of ice machine front end; Liquid outlet at electric T-shaped valve is provided with concentration measuring apparatus, and described concentration measuring apparatus is electrically connected with electric T-shaped valve.
The present invention compares with the dynamic ice-storage system with existing static ice storage system, has the following advantages:
1, can produce fine ice slurry by the adjusting of solution concentration continuously and stably, this ice-maker makes ice process stabilization, simple in structure, need not the required supercooling cancellation element of conventional dynamic ice-storage system, floor space is little, and initial cost is few, and ice making speed is fast.
2, the system works temperature is more than 0 ℃, refrigeration system evaporating temperature height, and the operational efficiency height of main frame can utilize existing single operating mode handpiece Water Chilling Units, need not to change.
3, cold-storage operation and cooling running, solution concentration is stable, and water does not melt the concentration decline phenomenon that causes in the time of can not taking place owing to cold-storage phase transformation generation concentration rising and cooling.
4, each system's operation medium is eutectic salts solution, and medium is single, need not to increase by second refrigerating medium and corresponding heat transmission equipment.
5, the cold accumulation system operation is controlled its flow with concentration, and process of cool and cooling process all can satisfy the load variations characteristic.
6, owing to refrigeration system, cold accumulation system, release cooling system and end system is connected in parallel, can realize respectively: 1. refrigeration host computer cooling, 2. refrigeration host computer cold-storage, 3. refrigeration host computer cooling+cold-storage, 4. cold-storage device cooling and 5. refrigeration host computer cooling+5 kinds of modes such as cold accumulation system cooling.
In sum, the present invention has advantage simple in structure, that operational reliability is high; In the district cooling air conditioner refrigerating environment that can be widely used in efficient is had relatively high expectations.
Description of drawings:
Fig. 1 is the systematic schematic diagram of one embodiment of the present of invention.
Among the figure, 1, partly seal double-screw compressor, 2, condenser, 3, device for drying and filtering, 4, expansion valve, 5, shell and tube evaporator, 6, first magnetic valve, 7, solution pump, 8, ice machine, 9, motor-driven valve, 10, booster pump, 11, choke valve, 12, concentration measuring apparatus, 13, the cold-storage jar, 14, heat exchange coil, 15, semipermeable membrane device, 16, reservoir, 17, electric T-shaped valve, 18, the air-treatment unit, 19, filter, 20, second magnetic valve, the 21, the 3rd magnetic valve, the 22, the 4th magnetic valve.
The specific embodiment:
With reference to Fig. 1, a kind of dynamic high temperature cool accumulation air conditioner system, it comprises refrigeration system, cold accumulation system, releases cooling system and end system, the refrigeration output of refrigeration system and cold accumulation system, releases cooling system and end system is connected in parallel.Refrigeration system is connected in sequence by compressor 1, condenser 2, device for drying and filtering 3, expansion valve 4 and evaporimeter 5.Cold accumulation system is by booster pump 10, motor-driven valve 9, ice machine 8, cold-storage jar 13, reservoir 16 and electric T-shaped valve 17 are formed by connecting, ice machine 8 is provided with semipermeable membrane device 15, described semipermeable membrane device adopts polyamide type composite membrane, highly concentrated solution outlet C was set before semipermeable membrane device, low concentration solution outlet D is set after semipermeable membrane device, low concentration solution outlet D is connected with the solution inlet port E of cold-storage jar 13, cold-storage jar 13 is provided with two taphole F and G, the second taphole G of cold-storage jar 13 is connected with the solution inlet port of reservoir 16 by the 4th magnetic valve 22, the taphole of reservoir 16 is connected with electric T-shaped valve 17, and the highly concentrated solution outlet C of ice machine 8 is connected with electric T-shaped valve 17 by merging the back with the first taphole F of cold-storage jar 13 after the choke valve 11.Release cooling system and be formed by connecting by second magnetic valve 20 and heat exchange coil 14, heat exchange coil 14 places among the cold-storage jar 13.End system is formed by connecting by solution pump 7, first magnetic valve 6 and air-treatment unit 18.Rear portion at described ice machine 8 semipermeable membrane devices 15 is provided with concentration measuring apparatus 12, and described concentration measuring apparatus 12 is electrically connected with the motor-driven valve 9 of ice machine 8 front ends; At the liquid outlet of electric T-shaped valve 17, concentration measuring apparatus 12 is set, described concentration measuring apparatus 12 is electrically connected with electric T-shaped valve 17.
Present embodiment, the cool storage medium solution in cold accumulation system is eutectic salts solution, phase transition temperature is at 5 ℃～10 ℃, and its phase transition temperature changes along with the variation of solution concentration; Circulating and release the refrigerating medium medium of being responsible for the heat migration in the cold circulation at described cold-storage also is eutectic salts solution, the operation concentration stabilize.Described eutectic salts solution is with Na
2SO
410H
2O is a main body, all the other small amount of N aCl, KCl, NH
4Cl, NaB
4O
210H
2O, SiO
2With silica gel as additive, the mass concentration (weight ratio) in its when operation is 5～30%.
This dynamic high temperature cool accumulation air conditioner system, owing to its refrigeration system, cold accumulation system, release cooling system and end system is connected in parallel, can realize respectively: 1. refrigeration host computer cooling, 2. refrigeration host computer cold-storage, 3. refrigeration host computer cooling+cold-storage, 4. cold-storage device cooling and 5. refrigeration host computer cooling+5 kinds of modes such as cold accumulation system cooling.Operation principle is as follows:
1. when the refrigeration machine cooling, first magnetic valve 6 and the 3rd magnetic valve 21 are opened, second magnetic valve 20 and motor-driven valve 9 are closed, secondary refrigerant liquid (metabisulfite solution) enters in the evaporimeter with 12 ℃, leave evaporimeter with 7 ℃, be transported to air-treatment unit 18 from A by the solution pump 7 and first magnetic valve 6, absorb the heat in the space that is cooled, get back to evaporimeter from B and constantly circulate.
2. when the refrigeration machine cold-storage, first magnetic valve 6, second magnetic valve 20 and the 4th magnetic valve 22 are closed, and motor-driven valve 9 and the 3rd magnetic valve 21 are opened.The metabisulfite solution of 12% concentration enters in the evaporimeter 5 with 12 ℃, leave evaporimeter with 7 ℃, enter in the ice machine 8 by booster pump 10, because pressure increases, under the counter osmosis of pellicle, part metabisulfite solution is by pellicle 15, concentration becomes 8% (its concentration is regulated according to the aperture of motor-driven valve 9 and choke valve 11), because its phase transition temperature is 7.5 ℃, this weak solution undergoes phase transition after entering cold-storage jar 13, obtain ice slurry, filter 19 is opened, and separates out solution concentration behind the ice slurry and is increased to 10% and leave cold-storage jar 13; The concentration of the metabisulfite solution that another part is held back is 15%, and pressure is higher, is mixed into the solution of 13% concentration by choke valve 11 backs and the solution of 10% concentration of coming out from the cold-storage jar.The water yield that electric T-shaped valve 17 adjustings are come out from reservoir 16, mixed solution concentration returns to 12%, and enters cooling again in the evaporimeter 5.The aperture of motor-driven valve 9 is regulated according to the result of concentration measuring apparatus 12.
3. at refrigeration machine simultaneously when cooling and cold-storage, the cold-storage course of work is as above identical, and simultaneously, first magnetic valve 6 is opened, and the part chilled water enters the air-treatment unit, and cooling is cooled behind the space and mixes with solution behind the cold-storage, gets back to evaporimeter and circulates.
4. when the cold accumulation system cooling, first magnetic valve 6, second magnetic valve 20 and the 4th magnetic valve 22 are opened, and the 3rd magnetic valve 21, motor-driven valve 9 are closed, and the water in the electric T-shaped valve control reservoir does not enter circulation line.Enter air-treatment unit 18 back temperature from the eutectic salts solution of solution pump 7 circulation and become 12 ℃, enter the heat exchange coil 14 in the cold-storage jar 13, after the heat exchange of ice slurry, temperature is reduced to 8 ℃, and gets back to solution pump 7 and circulate.The water that filter 19 is opened thawing then enters in the reservoir 16 by the 4th magnetic valve 22.
5. at cold accumulation system and refrigeration host computer simultaneously during cooling, the 3rd magnetic valve 21 is opened, and all the other runnings are with top described.
Claims (4)
1, a kind of dynamic high temperature cool accumulation air conditioner system, it is characterized in that: it comprises refrigeration system, cold accumulation system, release cooling system and end system, the refrigeration output and the cold accumulation system of refrigeration system, release cooling system and end system is connected in parallel, refrigeration system is by compressor (1), condenser (2), device for drying and filtering (3), expansion valve (4) and evaporimeter (5) are connected in sequence, described cold accumulation system is by booster pump (10), motor-driven valve (9), ice machine (8), cold-storage jar (13), reservoir (16) and electric T-shaped valve (17) are formed by connecting, ice machine (8) is provided with semipermeable membrane device (15), highly concentrated solution outlet (C) was set before semipermeable membrane device, low concentration solution outlet (D) is set after semipermeable membrane device, low concentration solution outlet (D) is connected with the solution inlet port (E) of cold-storage jar (13), cold-storage jar (13) is provided with two tapholes (F and G), second taphole (G) of cold-storage jar (13) is connected with the solution inlet port of reservoir (16) by the 4th magnetic valve (22), the taphole of reservoir (16) is connected with electric T-shaped valve (17), and the highly concentrated solution outlet (C) of ice machine (8) merges the back with first taphole (F) of cold-storage jar (13) afterwards by choke valve (11) and is connected with electric T-shaped valve (17); The described cooling system of releasing is formed by connecting by second magnetic valve (20) and heat exchange coil (14), and described heat exchange coil (14) places among the cold-storage jar (13); Described end system is formed by connecting by solution pump (7), first magnetic valve (6) and air-treatment unit (18).
2, dynamic high temperature cool accumulation air conditioner system according to claim 1 is characterized in that: the cool storage medium solution in cold accumulation system is eutectic salts solution, and phase transition temperature is at 5 ℃～10 ℃, and its phase transition temperature changes along with the variation of solution concentration; Circulating and release the refrigerating medium medium of being responsible for the heat migration in the cold circulation at described cold-storage is eutectic salts solution, the operation concentration stabilize.
3, dynamic high temperature cool accumulation air conditioner system according to claim 2 is characterized in that: described eutectic salts solution is sodium sulphate Na
2SO
410H
2O solution, the mass concentration 5～30% during its operation.
4, dynamic high temperature cool accumulation air-conditioning according to claim 1, it is characterized in that: at the rear portion of described ice machine (8) semipermeable membrane device (15), concentration measuring apparatus (12) is set, and described concentration measuring apparatus (12) is electrically connected with the motor-driven valve (9) of ice machine (8) front end; Liquid outlet in electric T-shaped valve (17) is provided with concentration measuring apparatus (12), and described concentration measuring apparatus (12) is electrically connected with electric T-shaped valve (17).
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| CN100470152C true CN100470152C (en) | 2009-03-18 |
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| EP3010756B1 (en) | 2013-06-18 | 2020-11-11 | Thermo King Corporation | Control method for a hybrid refrigeration system |
| WO2014205051A1 (en) | 2013-06-18 | 2014-12-24 | Thermo King Corporation | Hybrid temperature control system and method |
| CN103644612A (en) * | 2013-12-10 | 2014-03-19 | 重庆大学 | Heat source tower heat pump air-conditioning system capable of using cool storage device to assist heating |
| CN106958898A (en) * | 2017-04-28 | 2017-07-18 | 广州中臣埃普科技有限公司 | A kind of cold accumulation air-conditioner ice-reserving heat release case and its cold-storage method |
| CN109294523A (en) * | 2018-10-18 | 2019-02-01 | 浙江大学山东工业技术研究院 | A kind of cold accumulation air-conditioner |
| WO2022000168A1 (en) * | 2020-06-28 | 2022-01-06 | 南京达实能源技术有限公司 | Cold water storage system based on phase-change energy storage material cold storage tank |
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| CN114087643A (en) * | 2021-11-25 | 2022-02-25 | 天津大学 | Ground source heat pump and heating system integrated with phase change energy storage module |
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Owner name: GUANGDONG JIRONG AIR CONDITIONING CO., LTD. Free format text: FORMER OWNER: GUANGDONG PROVINCE JIRONG AIR CONDITIONER EQUIPMENT CO.,LTD. Effective date: 20091023 |
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Effective date of registration: 20091023 Address after: Guangdong District of Rongcheng city in Jieyang Province town of Ji Rong Hua Lou long avenue Patentee after: Guangdong Jirong Air-Conditioner Co., Ltd. Address before: Guangdong City, Jieyang province Jieyang city Rongcheng district town of Ji Rong Lu Patentee before: Girony Air-conditioner Equipment Co., Guangdong |