CN102434929B - Energy-saving dual-temperature air-conditioning system coupling solar energy, natural cold energy and off-peak electricity - Google Patents
Energy-saving dual-temperature air-conditioning system coupling solar energy, natural cold energy and off-peak electricity Download PDFInfo
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- CN102434929B CN102434929B CN201110400982XA CN201110400982A CN102434929B CN 102434929 B CN102434929 B CN 102434929B CN 201110400982X A CN201110400982X A CN 201110400982XA CN 201110400982 A CN201110400982 A CN 201110400982A CN 102434929 B CN102434929 B CN 102434929B
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
The invention discloses an energy-saving dual-temperature air-conditioning system coupling solar energy, natural cold energy and off-peak electricity, which is the air-conditioning system preferentially utilizing the solar energy, the natural cold energy and the off-peak electricity for energy storage. The technical scheme is that: on the basis of an existing air-conditioning structure, a phase change energy storage device is added, so that the natural cold energy can be used for cold accumulation in summer, and the solar energy can be used for heat accumulation in winter. The aims that the natural cold energy and a heat pump unit are used for cooling an indoor thermal environment in summer and the solar energy and the heat pump unit are used for heating in winter are realized, novel cleaning renewable energy sources are utilized to a greater extent, and the power consumption of an air-conditioner is reduced.
Description
Technical field
The present invention relates to a kind of energy-saving air conditioning system, particularly the energy-saving air conditioning system of a kind of solar energy, natural cold-energy and low ebb electric coupling.
Background technology
Along with the raising of development of economic construction and living standards of the people, the also increase day by day of requirement to indoor environment temperature brings the application of air-conditioning system extensive day by day thus.For the realization production process technological air conditioning need be arranged in the industrial production, commercial building (office building, hotel, big-and-middle-sized market etc.) need have business air conditioner, individual family then needs to have domestic air conditioning, and air-conditioning system has become the energy consumption rich and influential family, and its energy input increases just year by year.
Be example with the commercial building, air conditioning energy consumption is the major part of building energy consumption, accounts for the 50-60% of total energy consumption, by the statistics in Chongqing and Shanghai, only the central air-conditioning power consumption accounts for 23% and 31.1% of whole city's total electricity consumption respectively, and that gives the city has brought heavy pressure for distribution.
The frequent appearance of extreme weather in recent years, unusual weather conditions manifest day by day, and air conditioning energy consumption must further increase, and is constantly testing State Grid's supply especially.And non-renewable energy resources demand growing tension, imbalance between power supply and demand continues to strengthen, and how to improve energy utilization rate, utilizes novel clean reproducible energy to a greater extent, and it is significant to reduce air conditioning energy consumption.
Summary of the invention
Technical problem to be solved by this invention is, takes full advantage of regenerative resource, and a kind of air-conditioning system of preferentially utilizing solar energy, natural cold-energy and low ebb electricity to carry out accumulation of energy is provided.
Be such in order to address the above problem technical scheme of the present invention:
Natural cold-energy refers to " in the normal temperature environment, the low temperature difference low temperature heat energy of Cun Zaiing " naturally.This energy is a kind of potential a large amount of low-grade energies.For example, can pass through day and night temperature summer, gathers natural cold-energy at night, is stored in the phase-change material, supplies cold energy by day, reduces unit load, plays the effect of energy-saving and emission-reduction.
Solar energy is the energy of solar interior nuclear fusion reaction process generation continuously.The sun shines tellurian energy and be equivalent to 5,000,000 tons of coals each second.
The present invention can preferentially use above-mentioned regenerative resource aspect the energy, namely the natural cold-energy that summer, day and night temperature produced and winter solar can energy storage, secondly are the low ebb electricity energy storage of selecting country to vigorously advocate, adopts on ordinary days electricity price to carry out energy supplement at last.
A kind of solar energy, energy-conservation two warm air-conditioning systems of natural cold-energy and low ebb electric coupling, described air-conditioning system comprises source pump, first heat exchanger, second heat exchanger, solar heat-collection plate, blower fan, evaporative air cooler, the phase-changing energy-storing device, temperature sensing device, signal pickup assembly and controller, described source pump is connected with first heat exchanger, described first heat exchanger is connected with second heat exchanger by pipeline, be connected with solar heat-collection plate and blower fan on described second heat exchanger, described second heat exchanger is connected with evaporative air cooler by pipeline, it is characterized in that, described evaporative air cooler connects a phase-changing energy-storing device by pipeline, and described phase-changing energy-storing device connects user side by pipeline; The gateway of described phase-changing energy-storing device all is connected with temperature sensing device, and described temperature sensing device is connected with signal pickup assembly, and described signal pickup assembly is connected with controller;
Described phase-changing energy-storing device also is connected with first heat exchanger by pipeline, and described phase-changing energy-storing device is connected with second heat exchanger by pipeline.
Described pipeline is provided with the Electric air valve of control air flow.
Described phase-changing energy-storing device is two temp phase-change energy-accumulating devices, comprises natural cold-energy cold-storage part and solar heat-preservation part.
Described natural cold-energy is the day and night temperature in summer.
Packing material in the described pair of temp phase-change energy-accumulating device is divided into high temperature phase change material (pcm) and low-temperature phase-change material, by mass percentage, described high temperature phase change material (pcm) consist of 93.5%CaCl
26H
2O+1.9%SrCl
26H
2The O+4.6% sodium carboxymethylcellulose, low-temperature phase-change material consist of 45% certain herbaceous plants with big flowers acid+55% laurate.
This system is measured temperature of inlet air, outlet temperature and the wind pushing temperature of phase-changing energy-storing device by temperature sensor, feed back to control system, control system compares according to the signal value that configures in advance, control system output action signal, the unlatching of valve and the start and stop of equipment between each pipeline of control air-conditioning system.
Described air-conditioning system comprises following operational mode:
Solar heat-preservation pattern, PCM heat release pattern, source pump heat supply accumulation of heat united mode, source pump heat supply combined solar accumulation of heat pattern, natural cold-energy cold-storage pattern, PCM are put cold pattern, source pump cooling associating phase change cold-storage pattern, source pump cold-storage pattern.
These energy-conservation two warm air-conditioning systems are by different operational mode realization energy-saving runs throughout the year.
Beneficial effect, the present invention utilizes solar energy, energy-conservation two warm air-conditioning systems of natural cold-energy and low ebb electric coupling are to arise at the historic moment after taking all factors into consideration the characteristics of power save mode, compare with existing air-conditioning and structurally to have increased phase-changing energy-storing part (summer natural cooling source cold-storage part, winter solar energy accumulation of heat part), realized that indoor thermal environment relies on natural cooling source and source pump cooling in summer, rely on solar energy and source pump heat supply winter, transition season also can take full advantage of renewable energy solar energy and natural cooling source according to the form that require different choice natural cooling source cooling or solar-heating of individual to comfort level.
In addition, also can utilize energy storage system in the lower period of the electricity charge energy to be stored in conjunction with the tou power price policy of power system, the period big in the air-conditioning system demand, that the electricity charge are higher discharges this part energy, and natural energy resources is replenished.Owing to use natural energy resources, save operating cost in a large number, add the utilization of low ebb electricity, the operating cost of air-conditioning is declined to a great extent.
Not only can reduce the investment of new power plant construction, improve the utilization rate of existing generating equipment and power transmission and transforming equipment, can reduce simultaneously the environmental pollution that the energy uses (particularly for thermal power generation) to cause, save limited non-renewable resources, being conducive to the ecological balance, is a doulbe-sides' victory measure of benefiting the nation and the people.
Description of drawings
Describe the present invention in detail below in conjunction with the drawings and specific embodiments:
Fig. 1 is energy-conservation two warm air-conditioning system figure of solar energy of the present invention, natural cold-energy and low ebb electric coupling;
Wherein, 1 is source pump, and 2 is first heat exchanger, and 3 is solar heat-collection plate, and 4 is that second heat exchanger, 5 is blower fan, and 6 is evaporative air cooler, and 7 is two temp phase-change energy-accumulating devices, and 8 is temperature sensor, and 9 is signal pickup assembly, and 10 is controller, and 11 is Electric air valve.
The specific embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
As shown in Figure 1, a kind of solar energy of the present invention, energy-conservation two warm air-conditioning systems of natural cold-energy and low ebb electric coupling, described air-conditioning system comprises source pump 1, first heat exchanger 2, solar heat-collection plate 3, second heat exchanger 4, blower fan 5, evaporative air cooler 6, the phase-changing energy-storing device, temperature sensing device, signal pickup assembly 9 and controller 10, described source pump 1 is connected with first heat exchanger 2, described first heat exchanger 2 is connected with second heat exchanger 4 by pipeline, be connected with solar heat-collection plate 3 and blower fan 5 on described second heat exchanger 4, described second heat exchanger 4 is connected with evaporative air cooler 6 by pipeline, described evaporative air cooler 6 connects a phase-changing energy-storing device by pipeline, and described phase-changing energy-storing device connects user side by pipeline; The gateway of described phase-changing energy-storing device all is connected with temperature sensing device, and described temperature sensing device is connected with signal pickup assembly 9, and described signal pickup assembly 9 is connected with controller 10;
Described phase-changing energy-storing device also is connected with first heat exchanger 2 by pipeline, and described phase-changing energy-storing device is connected with second heat exchanger 4 by pipeline.
This system is measured temperature of inlet air, outlet temperature and the wind pushing temperature of phase-changing energy-storing device by temperature sensor, feed back to control system, control system compares according to the signal value that configures in advance, controller output action signal, the unlatching of valve and the start and stop of equipment between each pipeline of control air-conditioning system.
Described pipeline is provided with the Electric air valve 11 of control air flow.
In the present embodiment, what the phase-changing energy-storing device adopted is two temp phase-change energy-accumulating devices 7, and what temperature sensing device adopted is temperature sensor 8.
The system accumulator adopts 6 pairs of temp phase-change energy-accumulating devices, by adding the phase-change material of different melting points in accumulator, according to the flow through direction difference of accumulator of air, has realized the cascade utilization of energy during operation.
The air of the higher temperature high temperature phase change material (pcm) of flowing through earlier in the heat-accumulating process after reducing with its generation heat exchange temperature, passes through low-temperature phase-change material, again with its generation heat exchange.
The air of the lower temperature low-temperature phase-change material of flowing through earlier in the exothermic process after raising with its generation heat exchange temperature, passes through high temperature phase change material (pcm), again with its generation heat exchange.
The air of the lower temperature low-temperature phase-change material of flowing through earlier in the process of cool after raising with its generation heat exchange temperature, passes through high temperature phase change material (pcm), again with its generation heat exchange.
The air of the higher temperature high temperature phase change material (pcm) of flowing through earlier in the discharging cold course after reducing with its generation heat exchange temperature, passes through low-temperature phase-change material, again with its generation heat exchange.
Make heat transfer temperature difference increase by the phase-change material that in accumulator, adds different melting points, effectively utilized the energy of different temperatures gradient, improved energy utilization ratio, realized the cascade utilization of energy.
Described air-conditioning system comprises following operational mode:
1〉winter main operational mode
The solar heat-preservation pattern:
The solar heat-preservation pattern is opened, solar heat-collection plate absorbs heat, passes to hot-air by built-in heat transfer medium, and hot-air is successively by high temperature PCM, low temperature PCM accumulation of heat, valve F7, F8, F13, F14, F16, F17, F20, F21 open at this moment, and the accumulation of heat pattern is opened.
PCM heat release pattern:
Air passes through low temperature PCM and high temperature PCM successively, the PCM phase transformation release heat of thawing, and source pump is not moved this moment, and F1, F2, F5, F6, F7, F10, F12, F13, F14, F16, F18 open at this moment.Only when wind pushing temperature was lower than set-point, source pump was opened auxiliary heat supplying.
Source pump heat supply accumulation of heat united mode:
Heat supply in winter season, if when night, air conditioner load was higher, can utilizes low ebb to establish by cable and open the source pump heating mode, a hot-air part is successively by high temperature PCM (phase-change material) and low temperature PCM energy storage, and another part enters air-conditioned room and regulates indoor temperature.Valve F1, F2, F3, F4, F5, F6, F7, F10, F11, F12, F13, F14, F18 open at this moment.Night air conditioner load low when need not the source pump heat supply, can open the source pump heating mode, hot-air is by high temperature PCM and the simple energy storage of low temperature PCM, this moment, valve F3, F4, F5, F6, F7, F10, F11, F12, F13, F14, F18 opened.
Source pump heat supply combined solar accumulation of heat pattern:
The solar heat-preservation pattern is opened, and solar heat-collection plate absorbs heat, passes to hot-air by the endoplasm heat transfer medium.Hot-air is successively by high temperature PCM, low temperature PCM accumulation of heat, and valve F7, F8, F13, F14, F16, F17, F20, F21 open at this moment, and the accumulation of heat pattern is opened; Source pump is opened, heat in the direct supply chamber, and valve F1, F2, F3, F4 open.
2〉transition season, air-conditioning need not all the period of time and open, and open solar heat-storing device when illumination is sufficient, use night dip to open the heat pump accumulation of heat when illumination is inadequate, and accumulation of heat is then opened PCM exoergic pattern when needs during to the room heat supply;
3〉summer cooling operational mode in season
Natural cold-energy cold-storage pattern:
Fine, can utilize paddy valency electricity in night when day and night temperature is higher, adopt evaporative air cooler to make air themperature further be reduced to the cold air temperature and reach about 15 ℃-20 ℃.Cold air makes it undergo phase transition the storage cold by the low low temperature PCM of phase transition temperature.Raise through the air themperature behind the low-temperature zone phase-change material, reach about about 23 ℃-25 ℃.And then the higher high temperature section phase-change material of process phase transition temperature further stores cold.F11, F12, F13, F14, F15, F17, F18, F19, F21 open at this moment, and evaporative air cooler is opened.
PCM is put cold pattern:
Need provide to the room in the period of cold wind daytime, and elder generation discharges the cold in the PCM, and return air passes through high temperature PCM cooling earlier in the room at this moment, pass through low temperature PCM then, deliver to air-conditioned room, form a loop, F1, F2, F5, F6, F9, F10, F11, F13, F14 open at this moment.When wind pushing temperature was lower than setting value, refrigeration unit was opened; The cold that refrigeration unit produces hour can a part be delivered to air-conditioned room when room load, and a part is used for the PCM cold-storage, and this moment, cold wind fed air-conditioned room fully when indoor load is higher with reference to source pump cooling associating phase change cold-storage pattern.
Source pump cooling associating phase change cold-storage pattern:
Utilize low ebb to establish by cable and open the source pump refrigeration mode, a cold air part is successively by low temperature PCM and high temperature PCM energy storage, and another part enters air-conditioned room and regulates indoor temperature.Valve F1, F2, F3, F4, F5, F6, F9, F10, F11, F13, F14 open at this moment.The source pump refrigeration mode is opened.
Source pump cold-storage pattern:
When need not cooling night, can open the source pump refrigeration mode, cold air is by low temperature PCM and the simple energy storage of high temperature PCM.Valve F3, F4, F5, F6, F9, F10, F11, F13, F14 open at this moment.The source pump refrigeration mode is opened.
Signal pickup assembly receives the temperature signal of temperature sensor and setting, under the environment different condition, control the start and stop of Electric air valve, source pump, first heat exchanger, second heat exchanger, solar heat-collection plate, blower fan and evaporative air cooler etc. by controller, thereby realize the switching of each pattern of unit.
The operational mode of the energy-saving air conditioning system of solar energy, natural cold-energy and low ebb electric coupling has been considered different time, different weather condition, different chamber's internal loading requirement respectively, can also regulate according to actual conditions in addition.
More than show and described basic principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (5)
1. solar energy, energy-conservation two warm air-conditioning systems of natural cold-energy and low ebb electric coupling, described air-conditioning system comprises source pump, first heat exchanger, second heat exchanger, solar heat-collection plate, blower fan, evaporative air cooler, the phase-changing energy-storing device, temperature sensing device, signal pickup assembly and controller, described source pump is connected with first heat exchanger, described first heat exchanger is connected with second heat exchanger by pipeline, be connected with solar heat-collection plate and blower fan on described second heat exchanger, described second heat exchanger is connected with evaporative air cooler by pipeline, it is characterized in that, described evaporative air cooler connects a phase-changing energy-storing device by pipeline, and described phase-changing energy-storing device connects user side by pipeline; The gateway of described phase-changing energy-storing device all is connected with temperature sensing device, and described temperature sensing device is connected with signal pickup assembly, and described signal pickup assembly is connected with controller;
Described phase-changing energy-storing device also is connected with first heat exchanger by pipeline, and described phase-changing energy-storing device is connected with second heat exchanger by pipeline;
Described phase-changing energy-storing device is two temp phase-change energy-accumulating devices, comprises natural cold-energy cold-storage part and solar heat-preservation part;
Packing material in the described pair of temp phase-change energy-accumulating device is divided into high temperature phase change material (pcm) and low-temperature phase-change material, by mass percentage, described high temperature phase change material (pcm) consist of 93.5%CaCl
26H
2O+1.9%SrCl
26H
2The O+4.6% sodium carboxymethylcellulose, low-temperature phase-change material consist of 45% certain herbaceous plants with big flowers acid+55% laurate.
2. energy-conservation two warm air-conditioning systems of a kind of solar energy according to claim 1, natural cold-energy and low ebb electric coupling is characterized in that described pipeline is provided with the Electric air valve of control air flow.
3. energy-conservation two warm air-conditioning systems of a kind of solar energy according to claim 1, natural cold-energy and low ebb electric coupling is characterized in that described natural cold-energy is the day and night temperature in summer.
4. energy-conservation two warm air-conditioning systems of a kind of solar energy according to claim 1, natural cold-energy and low ebb electric coupling, it is characterized in that, this system is measured temperature of inlet air, outlet temperature and the wind pushing temperature of phase-changing energy-storing device by temperature sensor, feed back to control system, control system compares according to the signal value that configures in advance, control system output action signal, the unlatching of valve and the start and stop of equipment between each pipeline of control air-conditioning system.
5. energy-conservation two warm air-conditioning systems of a kind of solar energy according to claim 4, natural cold-energy and low ebb electric coupling is characterized in that described air-conditioning system comprises following operational mode:
Solar heat-preservation pattern, PCM heat release pattern, source pump heat supply accumulation of heat united mode, source pump heat supply combined solar accumulation of heat pattern, natural cold-energy cold-storage pattern, PCM are put cold pattern, source pump cooling associating phase change cold-storage pattern, source pump cold-storage pattern.
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| CN105299808B (en) * | 2015-12-04 | 2018-03-23 | 广西班仕达绿色建筑节能科技有限公司 | Phase change cold-storage, accumulation of heat refrigeration and heating air-conditioning device |
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| JPH02233925A (en) * | 1989-03-08 | 1990-09-17 | Kajima Corp | Heat pump air conditioning device having heat storage tank |
| CN101603714B (en) * | 2009-07-31 | 2012-05-30 | 际高建业有限公司 | Energy-saving air conditioning system utilizing radiating capillary tail ends for high and large space |
| CN101893299A (en) * | 2010-08-17 | 2010-11-24 | 上海交通大学 | Solar adsorption type air-conditioning system based on phase change cold accumulation |
| CN202371823U (en) * | 2011-12-06 | 2012-08-08 | 上海海事大学 | Energy-saving and dual-temperature air-conditioning system for solar energy, natural cold energy and low-ebb electric coupling |
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