CN102519290A - Phase-change energy storage device and ternary single-way/two-way phase-change energy storage method and system - Google Patents
Phase-change energy storage device and ternary single-way/two-way phase-change energy storage method and system Download PDFInfo
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- CN102519290A CN102519290A CN201210002250XA CN201210002250A CN102519290A CN 102519290 A CN102519290 A CN 102519290A CN 201210002250X A CN201210002250X A CN 201210002250XA CN 201210002250 A CN201210002250 A CN 201210002250A CN 102519290 A CN102519290 A CN 102519290A
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Abstract
The invention provides a phase-change energy storage device and a ternary single-way/two-way phase-change energy storage method and system. The phase-change energy storage device comprises a housing, a phase-change energy storage body, a refrigerating agent pipeline, a water flow channel and a control device, wherein a water flow inlet, a water flow outlet, a refrigerating agent inlet and a refrigerating agent outlet are arranged on the housing; the phase-change energy storage body, the refrigerating agent pipeline and the water flow channel are arranged in the housing; and the phase-change energy storage body comprises a phase-change material and a metal container for accommodating the phase-change material. The phase-change energy storage device and the ternary single-way/two-way phase-change energy storage method and system have the advantages of high-efficient heat transfer, safety, reliability, energy conservation and environment-friendly property.
Description
Technical field
The present invention relates to a kind of phase-change accumulation energy device and ternary list/two-way phase-change accumulation energy method and system, belong to new material and new forms of energy application.
Technical background
Along with the lot of consumption of the constant development of economy and the energy, the energy-conservation topic that has become whole world concern.Country's " 12 " development plan and " State Council is about accelerating the decision (No. [2010] 32, promulgated by the State Council) of cultivation and development strategy property new industry " all explicitly call for focus development to promote high-efficiency energy-saving technology equipment and product, realize that the major fields key technology breaks through.So the research of energy storage and heat transfer technology just seems particularly important.Phase-change heat transfer has important significance for theories and broad application background for fields such as chemical industry, refrigeration, discharge and power, spacecraft heat control techniques, and reinforced transformation one of problem that people often pay close attention to most of conducting heat how.Therefore, develop efficient phase change energy storage technology, the energy conversion efficiency and the storage density of reinforced transformation heat energy device could be alleviated problems such as present energy shortage effectively.
The air conditioner energy saving technology has obtained flourish, but the problem of present ubiquity several respects: the one, the entire system Energy Efficiency Ratio is low, and efficiency of energy utilization is low, causes energy consumption high.The 2nd, indoor air quality worsens, and directly influences health.The 3rd, do not make full use of natural cooling source, be unfavorable for balance electrical network peak valley.With Tokyo power industry Academia Sinica and Japanese Utsunomiya university building system is that the Japanology mechanism research of representative shows: the PCM of phase transition temperature between 20-22 ℃ is suitable for the phase change cold-storage air-conditioning technical; And can make indoor temperature remain on 25-26 ℃, can reach good indoor hot comfort.Therefore develop phase change energy storage technology, make full use of natural cooling source, save energy consumption and utilize energy-storage system to alleviate the impact of air-conditioning equipment electrical network; Improve the surrounding air quality, improve comfort level, concrete crucial meaning.
Summary of the invention
The objective of the invention is to propose a kind of phase-change accumulation energy device and ternary list/two-way phase-change accumulation energy method and system, this phase-change accumulation energy device and ternary list/efficient, safe and reliable, energy-conserving and environment-protective of two-way phase-change accumulation energy method and system heat transfer.
Technical solution of the present invention is following:
A kind of phase-change accumulation energy device comprises shell, phase-change accumulation energy body, refrigerant tubing, water stream channel and control device;
Shell is provided with flow inlet, water export, refrigerant inlet and refrigerant outlet; Described phase-change accumulation energy body, refrigerant tubing and water stream channel all are arranged in the housing; The phase-change accumulation energy body comprises phase-change material and the canister that is used to hold phase-change material.
Described phase-change accumulation energy body is a plurality of, and a plurality of phase-change accumulation energy bodies are top side and the bottom side that indenting mode is arranged on shell.
The overall shape of described refrigerant tubing is a square waveform, totally forms for the refrigerant tubing of square waveform is docked by multistage square waveform pipeline successively.
A kind of ternary is single/two-way phase-change accumulation energy system, comprise refrigeration system and aforesaid phase-change accumulation energy device, and described ternary is water, cold-producing medium and phase-change material body; Refrigeration system comprises condenser, evaporimeter, compressor and choke valve; Refrigeration system is connected with the coolant channel of phase-change accumulation energy device through parallel connection or series system; The water stream channel of phase-change accumulation energy device carries out closed circulation [closed circulation, the flow inlet that is about to the water stream channel of phase-change accumulation energy device will be blocked up with water export, let water self-loopa in the phase-change accumulation energy device], perhaps water stream channel is communicated with outdoor cold water.
When adopting series system, condenser, evaporimeter, compressor, choke valve and phase-change accumulation energy device serial connection.
When adopting parallel way, choke valve, condenser, compressor and evaporimeter serial connection, the phase-change accumulation energy device is parallelly connected with evaporimeter through two triple valves.
The control device of phase-change accumulation energy device comprises microprocessor, temperature sensor, flow sensor and alarm; Temperature sensor, flow sensor and alarm all are connected with microprocessor, and flow control valve also is housed in refrigerant tubing and the water stream channel; Flow control valve is controlled by microprocessor.
A kind of phase-change accumulation energy device and ternary list/two-way phase-change accumulation energy method, adopt aforesaid ternary single/two-way phase-change accumulation energy system, comprise unidirectional phase-change accumulation energy pattern and two-way phase-change accumulation energy pattern; These two kinds of patterns simultaneously or individualism; Refrigerant flow direction and water (flow) direction are opposite;
Unidirectional phase-change accumulation energy pattern refers to that cold-producing medium feeds water the cold transmission;
Two-way phase-change accumulation energy pattern: refer to that water passes to phase-change material with cold, perhaps, phase-change material feeds water the cold transmission.
At first with cold transmission feedwater, be unidirectional phase-change accumulation energy pattern this moment to cold-producing medium under the cold-storage operating mode; Water passes to phase-change material with cold, and this moment, phase-change material became solid phase from liquid phase;
Put under the cold operating mode phase-change material with cold transmission feedwater, but water can not pass to cold-producing medium with cold, this moment, phase-change material became liquid phase from solid phase.
Ternary is single/during two-way phase-change accumulation energy system operation, comprise following two kinds of operating modes:
1. phase variant energy storage operating mode:
Prescribe a time limit when the current temperature is lower than under the preset temperature, refrigerant tubing is closed, and water stream channel is opened; When the phase-change accumulation energy temperature was higher than the current temperature, because the heat transfer temperature difference effect, phase-change accumulation energy body and water stream channel carried out heat exchange automatically; The absorption cold carries out energy storage and undergoes phase transition, and liquid becomes solid;
When being higher than on the preset temperature, the current temperature prescribes a time limit; Refrigerant tubing and water stream channel are opened simultaneously, and refrigerant tubing is the current coolings, when the phase-change accumulation energy temperature is higher than the current temperature; The phase-change accumulation energy body absorbs cold automatically through water stream channel to carry out energy storage and undergoes phase transition, and liquid becomes solid;
2. the phase variant is released the ability operating mode:
Prescribe a time limit when the current temperature is higher than under the preset temperature, refrigerant tubing is closed, and water stream channel is opened; When the phase-change accumulation energy temperature is lower than the current temperature; Phase-change accumulation energy body and water stream channel carry out heat exchange automatically, and released cold quantity is released and can and be undergone phase transition, and solid becomes liquid.
Shell adopts metal or plastic material, and pastes insulation material outward, and insulation material is polyurethane, polystyrene, aluminium silicate wool felt or rubber and plastic.
Described phase-change material body is Ba (OH)
28H
2O, Zn (NO
3)
26H
2O, CaBr
26H
2O or CaCl
26H
2O, Na
2CO
310H
2O, Na
2HPO
412H
2O or inorganic-organic double compound;
Beneficial effect:
The phase-change accumulation energy device can be realized parallelly connected or series operation with air-conditioning system flexibly; The control logic that carries through this device realizes the operation and the switching of different operating modes; So that improve the operational efficiency of refrigeration system greatly; Prolong the running time of natural cooling source, and solve the difficult problem that to freeze after the power failure.Utilize outdoor natural cooling source to be the phase-change material accumulation of energy, or utilize cold-producing medium to be the phase-change material accumulation of energy during night dip electricity price; Emitting cold when treating not have daytime the capable of using or peak value electricity price of natural cooling source is room temperature lowering, shortens the running time of refrigeration machine greatly, reduces the energy consumption of air-conditioning system, and utilizes the time-of-use tariffs difference, has considerable economic.
Based on phase-change accumulation energy efficient and the low problem of heat transfer efficiency; The present invention combines model structure dexterously with ternary list/two-way heat transfer theory; Through phase-change accumulation energy body and the coupling of air-conditioning system characteristic, directly be dissolved into the phase-change accumulation energy body in traditional air conditioner refrigerating four big parts and the operation of refrigeration system serial or parallel connection; Utilize the phase-change accumulation energy body to bear the refrigeration demand on daytime, reduce the running time of refrigeration system.Simultaneously this phase-change accumulation energy body can also the locker room outside natural cooling source, the circulation through water is stored in outdoor natural cooling source in the phase-change accumulation energy body.When circulating water temperature is higher than phase-change material temperature, utilize phase-change material that it is released cold cooling, save the energy consumption effect thereby reach; When water stream channel and phase transformation passage all fail to satisfy the demands; Refrigerant tubing carries out refrigeration cool-down and energy stores through opening; Thereby realize that the current operating mode is stable, make its water temperature constant within required scope (preset 20 ℃-25 ℃), reduce the air conditioning water secondary conversion energy consumption of losing; Guarantee the normally operation of air conditioner end equipment evaporated condensation water, safety, and finally reach purpose of energy saving.
The two-way phase-change heat-exchange energy-storage module of this ternary (list) device has following clear superiority:
1, the natural cold quantity in the outdoor cold water capable of using is to the energy storage of lowering the temperature of phase-change accumulation energy body, thereby reduced the opening time of refrigerant tubing, and then saves the operation and the maintenance expense of air-conditioning equipment.
2, when air conditioner in machine room equipment fault or power failure, release the refrigeration requirement that can keep water stream channel, guarantee equipment operate as normal in the machine room, have security reliability through the control phase-change material.
3, adopt this phase-change accumulation energy device to carry out heat exchange, improved the heat exchange efficiency of refrigerant tubing and water stream channel, water stream channel and phase-change accumulation energy body, it is efficient promptly to conduct heat, thereby improves efficiency of energy utilization.
4, the control device of phase-change accumulation energy device adopts the technical grade Programmable Logic Controller, and the stability of a system is strong.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the sketch map that is connected in parallel of the present invention and refrigeration system;
Fig. 3 is the sketch map that is connected in series of the present invention and refrigeration system;
Fig. 4 is the structured flowchart of control device;
Label declaration:
1, phase-change accumulation energy body; 2, refrigerating channel; 3, water stream channel; 4, phase-change accumulation energy device; 5, first triple valve; 6, compressor; 7, condenser; 8, choke valve; 9, second triple valve; 10, evaporimeter.
The specific embodiment
Below combination figure and practical implementation process are explained further details to the present invention.
Embodiment 1:
As shown in Figure 1, a kind of phase-change accumulation energy device is evenly arranged series of phase transitions energy storage body (shown in accompanying drawing 1) in the enclosure, forms aquaporin between the phase-change accumulation energy body; Arrange tortuous copper pipe along the water stream channel direction, form refrigerant tubing, and refrigerant flow direction is opposite with water (flow) direction so that strengthen heat exchange.Temperature sensor all is installed in phase-change accumulation energy body, refrigerant tubing, the water stream channel, flow control valve also is housed in refrigerant tubing and the water stream channel; The heat transfer module device has liquid injection hole; The control system comprises microprocessor, temperature sensor, communication module and alarm; Described sensor, communication module and alarm all are connected with microprocessor.Utilize the temperature of temperature, indoor temperature and the phase-change material body of temperature sensor measurement circulation Inlet and outlet water, when indoor temperature surpasses temperature upper limit, start alarm; Detected all temps signal is passed to microprocessor through communication module, to realize the normal operation and the switching of various operating modes.
This phase-change heat-exchange energy storage device is introduced outdoor cold water through water stream channel; Process is carried out stored energy with the phase-change material heat exchange, and when the current operating mode is not satisfied the demand, by phase-change accumulation energy body and refrigerant tubing it is lowered the temperature; Guarantee the current temperature stabilization, and finally reach purpose of energy saving.
Described water stream channel, refrigerant tubing are equipped with flow control valve;
Mounting temperature sensor in described refrigerant tubing, water stream channel, the phase transformation passage;
Described phase-change accumulation energy heat transfer module device; It is characterized in that each building block of phase-change accumulation energy heat transfer module device is installed in the module, module housing adopts metal or plastic material; And paste insulation material outward, insulation material is polyurethane, polystyrene, aluminium silicate wool felt or rubber and plastic;
Described phase-change accumulation energy heat transfer module device is characterized in that described control device also comprises temperature sensor, flow sensor, communication module and alarm; Described sensor, communication module and alarm all are connected with microprocessor.
Its course of work is:
1. phase variant energy storage operating mode:
When the current temperature was lower than preset temperature lower limit (20 ℃), refrigerant tubing was closed, and simultaneously close compressor, condenser and expansion valve [being choke valve] are only opened water stream channel, and the cold water that provides through outdoor natural cooling source effect is to the accumulation of energy of phase-change accumulation energy device; When the phase-change accumulation energy temperature was higher than the current temperature, because the heat transfer temperature difference effect, phase-change accumulation energy body and water stream channel carried out heat exchange automatically, and the absorption cold carries out energy storage and undergoes phase transition, and liquid becomes solid;
When the current temperature was higher than the preset temperature upper limit (25 ℃), refrigerant tubing and water stream channel were opened simultaneously, and compressor and starting, condenser and expansion valve, refrigerant tubing are the current coolings; When the phase-change accumulation energy temperature was higher than the current temperature, the phase-change accumulation energy body absorbs cold automatically through water stream channel to carry out energy storage and undergoes phase transition, and liquid becomes solid;
2. the phase variant is released the ability operating mode:
When the current temperature was higher than preset temperature lower limit (20 ℃), refrigerant tubing was closed, while close compressor, condenser and expansion valve, and water stream channel is opened; When the phase-change accumulation energy temperature was lower than the current temperature, phase-change accumulation energy body and water stream channel carried out heat exchange automatically, and phase-change accumulation energy body released cold quantity reduces the current temperature, utilizes the water of low temperature to be room temperature lowering, and this moment, the phase-change accumulation energy body underwent phase transition, and solid becomes liquid.
According to theoretical analysis and calculation and simulation, the air-conditioning system that has this phase-change accumulation energy heat transfer module device can realize the year air conditioner energy saving more than 35% of industrial building, the year air conditioner energy saving more than 20% of civil buildings.
Claims (10)
1. a phase-change accumulation energy device is characterized in that, comprises shell, phase-change accumulation energy body, refrigerant tubing, water stream channel and control device;
Shell is provided with flow inlet, water export, refrigerant inlet and refrigerant outlet; Described phase-change accumulation energy body, refrigerant tubing and water stream channel all are arranged in the housing; The phase-change accumulation energy body comprises phase-change material and the canister that is used to hold phase-change material.
2. phase-change accumulation energy device according to claim 1 is characterized in that, described phase-change accumulation energy body is a plurality of, and a plurality of phase-change accumulation energy bodies are top side and the bottom side that indenting mode is arranged on shell.
3. phase-change accumulation energy device according to claim 1 is characterized in that, the overall shape of described refrigerant tubing is a square waveform, totally forms for the refrigerant tubing of square waveform is docked by multistage square waveform pipeline successively.
A ternary single/two-way phase-change accumulation energy system, it is characterized in that comprise each described phase-change accumulation energy device of refrigeration system and claim 1-3, described ternary is water, cold-producing medium and phase-change material body; Refrigeration system comprises condenser, evaporimeter, compressor and choke valve; Refrigeration system is connected with the coolant channel of phase-change accumulation energy device through parallel connection or series system; The water stream channel of phase-change accumulation energy device carries out closed circulation, perhaps water stream channel is communicated with outdoor cold water.
5. ternary according to claim 4 is single/two-way phase-change accumulation energy system, it is characterized in that, and when adopting series system, condenser, evaporimeter, compressor, choke valve and phase-change accumulation energy device serial connection.
6. ternary according to claim 4 is single/two-way phase-change accumulation energy system, it is characterized in that, and when adopting parallel way, choke valve, condenser, compressor and evaporimeter serial connection, the phase-change accumulation energy device is parallelly connected with evaporimeter through two triple valves.
According to claim 5 or 6 described ternarys single/two-way phase-change accumulation energy system, it is characterized in that the control device of phase-change accumulation energy device comprises microprocessor, temperature sensor, flow sensor and alarm; Temperature sensor, flow sensor and alarm all are connected with microprocessor, and flow control valve also is housed in refrigerant tubing and the water stream channel; Flow control valve is controlled by microprocessor.
8. phase-change accumulation energy device and ternary list/two-way phase-change accumulation energy method is characterized in that, adopt the described ternary of claim 7 single/two-way phase-change accumulation energy system, comprise unidirectional phase-change accumulation energy pattern and two-way phase-change accumulation energy pattern; These two kinds of patterns simultaneously or individualism; Refrigerant flow direction and water (flow) direction are opposite;
Unidirectional phase-change accumulation energy pattern refers to that cold-producing medium feeds water the cold transmission;
Two-way phase-change accumulation energy pattern: refer to that water passes to phase-change material with cold, perhaps, phase-change material feeds water the cold transmission.
9. phase-change accumulation energy device according to claim 8 and ternary list/two-way phase-change accumulation energy method is characterized in that, at first with cold transmission feedwater, be unidirectional phase-change accumulation energy pattern this moment to cold-producing medium under the cold-storage operating mode; Water passes to phase-change material with cold, and this moment, phase-change material became solid phase from liquid phase;
Put under the cold operating mode phase-change material with cold transmission feedwater, but water can not pass to cold-producing medium with cold, this moment, phase-change material became liquid phase from solid phase.
10. phase-change accumulation energy device according to claim 9 and ternary list/two-way phase-change accumulation energy method is characterized in that, ternary is single/during two-way phase-change accumulation energy system operation, comprise following two kinds of operating modes:
1. phase variant energy storage operating mode:
Prescribe a time limit when the current temperature is lower than under the preset temperature, refrigerant tubing is closed, and water stream channel is opened; When the phase-change accumulation energy temperature was higher than the current temperature, because the heat transfer temperature difference effect, phase-change accumulation energy body and water stream channel carried out heat exchange automatically; The absorption cold carries out energy storage and undergoes phase transition, and liquid becomes solid;
When being higher than on the preset temperature, the current temperature prescribes a time limit; Refrigerant tubing and water stream channel are opened simultaneously, and refrigerant tubing is the current coolings, when the phase-change accumulation energy temperature is higher than the current temperature; The phase-change accumulation energy body absorbs cold automatically through water stream channel to carry out energy storage and undergoes phase transition, and liquid becomes solid;
2. the phase variant is released the ability operating mode:
Prescribe a time limit when the current temperature is higher than under the preset temperature, refrigerant tubing is closed, and water stream channel is opened; When the phase-change accumulation energy temperature is lower than the current temperature; Phase-change accumulation energy body and water stream channel carry out heat exchange automatically, and released cold quantity is released and can and be undergone phase transition, and solid becomes liquid.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102927721A (en) * | 2012-11-09 | 2013-02-13 | 沈阳建筑大学 | Ternary bidirectional phase change energy storage type heat exchanger |
| CN102997732A (en) * | 2012-11-09 | 2013-03-27 | 沈阳建筑大学 | Novel two-way phase transformation energy storage equipment |
| CN106642855A (en) * | 2016-11-16 | 2017-05-10 | 南京航空航天大学 | Airborne evaporation cycle refrigeration comprehensive heat management system and method and application thereof |
| CN110068166A (en) * | 2019-03-26 | 2019-07-30 | 南京航空航天大学 | A kind of gas-liquid and fluid-solid coupling phase-change accumulation energy radiator |
| CN111083912A (en) * | 2019-12-25 | 2020-04-28 | 湖南大学 | Phase change energy storage cold energy distribution unit, air conditioning system using same and control method of air conditioning system |
| CN114526626A (en) * | 2020-11-23 | 2022-05-24 | 广东美的白色家电技术创新中心有限公司 | Energy storage heat exchange device and electrical equipment |
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| CN111083912A (en) * | 2019-12-25 | 2020-04-28 | 湖南大学 | Phase change energy storage cold energy distribution unit, air conditioning system using same and control method of air conditioning system |
| CN114526626A (en) * | 2020-11-23 | 2022-05-24 | 广东美的白色家电技术创新中心有限公司 | Energy storage heat exchange device and electrical equipment |
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