CN104180521A - Nanometer phase change energy-storage-type heat pump water heater - Google Patents
Nanometer phase change energy-storage-type heat pump water heater Download PDFInfo
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- CN104180521A CN104180521A CN201410378133.2A CN201410378133A CN104180521A CN 104180521 A CN104180521 A CN 104180521A CN 201410378133 A CN201410378133 A CN 201410378133A CN 104180521 A CN104180521 A CN 104180521A
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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
- 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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention discloses a nanometer phase change energy-storage-type heat pump water heater. The heat pump water heater comprises a phase change energy storage box, wherein a condensation heat exchange coil pipe and a waterway heat exchange coil pipe are mounted in the phase change energy storage box; an expansion valve, an evaporimeter and a compressor are connected in a condensation heat exchange coil pipe loop in sequence; the phase change energy storage box is filled with a nanometer phase change energy storage material of which the phase change temperature is 50 to 60 DEG C; the nanometer phase change energy storage material comprises the following components in parts by weight: 0.5 to 2.0 parts of nano-particles, 0.9 to 3.6 parts of a dispersant, 94.4 to 98.6 parts of a phase change working medium. The potential heat value of the phase change material is large, and lots of heat can be absorbed in a phase change process, so that the heat conductivity coefficient of the phase change material is high, the heat transfer coefficient of the phase change energy storage box is improved, the time for thermal reaction is shortened, the efficiency is higher, and the energy conservation can be achieved better; thus, the heat pump water heater provided by the invention can be applied to the production and life field to realize that electric energy can be utilized to generate and store the heat during a low electricity demand period and release the heat during a high electricity demand period. Thus, the mismatch of two sides of energy supplying and energy demanding on time, strength and place is effectively released and solved, so that the aim that energy can be utilized reasonably and environmental pollution can be relieved is achieved.
Description
Technical field
The present invention relates to a kind of Teat pump boiler with nano phase change energy storage working medium, belong to technical field of heat exchange.
Background technology
Along with growth in the living standard, security performance, the environmental requirement of people to water heater is also more and more higher.In hotel, the place such as restaurant, natatorium, to being in great demand of hot water, mostly adopt at present the even coal-fired mode of heating of fuel oil, combustion gas to produce hot water, this has caused huge pollution and destruction to environment, has caused threat to the mankind's existence.And the present power status situation of China is very urgent, enter the state of annual continuation short of electricity at present, most provinces and cities have all implemented power cuts to limit consumption, therefore, develop new water heater that is not only energy-conservation but also environmental protection and are very important.
Since the nineties in 20th century, researcher starts exploration nano material technology is applied to augmentation of heat transfer field, studies efficient heat transfer cooling technology of new generation.Nineteen ninety-five, the Choi of Argonne National Laboratory of the U.S. etc. has proposed a brand-new concept-nano-fluid: be suspended in and in base fluid, form the heat-conductive cooling working medium that a class is new by the metal of 1-100nm or nonmetal particle, compared with former pure working medium, the thermal conductivity factor of nano-fluid significantly improves, and has extremely superior heat transfer property.
The patent document that publication number is " CN102297511A " discloses a kind of nano phase change energy-accumulation type hot pump water heater, space-filling between heat exchange coil and inner bag has nano phase change energy storage material, and nano phase change energy storage material is to be in non-conductive organic heat storage medium (tetradecylic acid, paraffin or polyethylene glycol) of 45-90 DEG C, to add the lamella nano-graphite that percentage by weight is 2% in phase transition temperature.The thermal conductivity factor of lamella nano-graphite is 160 W/mK, and this causes the heat transfer coefficient of phase-change accumulation energy case low, and the thermal response time is long, and particularly, the phase transition temperature of this nano phase change energy storage material is 45-90 DEG C, the poor stability of phase-change material.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of heat transfer coefficient high, the thermal response time is short, and efficiency is higher, more energy-conservation nano phase change energy-accumulation type hot pump water heater.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of nano phase change energy-accumulation type hot pump water heater, comprise phase-change accumulation energy case, condensing heat-exchange coil pipe and water route heat exchange coil are installed in described phase-change accumulation energy case, between the output of described condensing heat-exchange coil pipe and input, be connected with expansion valve in turn, evaporimeter and compressor, one end of described water route heat exchange coil is connected with cold water inlet, the other end is connected with hot water outlet pipe, in described phase-change accumulation energy case, be filled with phase transition temperature and be the nano phase change energy storage material of 50-60 DEG C, the component of described nano phase change energy storage material and parts by weight are: nano particle 0.5-2.0 part, dispersant 0.9-3.6 part and phase-change working substance 94.4-98.6 part.
The weight ratio of described nano particle and dispersant is 1.0:1.8.
Described nano particle is selected CNT, and the internal diameter of described CNT is 2-5nm, external diameter <8nm, and length is 0.5-2 μ m, purity >95wt%.
Described dispersant is Polyethylene Octylphenol Ether.
Described phase-change working substance is paraffin.
The preparation method of above-mentioned nano phase change energy storage material is:
1,, by the nano particle of above-mentioned parts by weight and dispersant, stir 5 minutes to dissolving completely.
2, the nano particle making in upper step and dispersant solution being joined in the melt phase change working medium of above-mentioned parts by weight, is then that 80KHz, temperature are ultrasonic vibration 2 hours under the condition of 60 DEG C in ultrasonic frequency, obtains nano phase change energy storage material.
The invention has the beneficial effects as follows: in the bright Teat pump boiler phase-change accumulation energy case of this law, be filled with phase transition temperature and be the nano phase change energy storage material of 50-60 DEG C, phase-change material potential heat value is large, in phase transition process, can absorb a large amount of heats, phase-change material thermal conductivity factor is high, improve the heat transfer coefficient of phase-change accumulation energy case, shorten the thermal response time, efficiency is higher, more energy-conservation, can significantly reduce Teat pump boiler volume, floor space is little, lightweight, easy to use, flexible for installation, can be widely used in productive life field, utilize electric energy to produce 3-4 heat doubly by nano phase change material in the ebb electricity consumption phase, in the peak electricity consumption phase, its latent-heat storage is discharged, realize " peak load shifting ", a kind of safety, efficiently, energy-conservation and environment amenable water heater, can effectively alleviate and solve energy supply and demand both sides in the time, not mating on intensity and place, reach reasonable energy utilization and alleviate the objects such as environmental pollution.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is heat pump type water heater structure schematic diagram of the present invention.
Detailed description of the invention
With reference to Fig. 1, a kind of nano phase change energy-accumulation type hot pump water heater, comprise phase-change accumulation energy case 4, condensing heat-exchange coil pipe 8 and water route heat exchange coil 9 are installed in described phase-change accumulation energy case 4, between the output of described condensing heat-exchange coil pipe 8 and input, be connected with expansion valve 3, evaporimeter 1 and compressor 7 in turn, one end of described water route heat exchange coil 9 is connected with cold water inlet 5, the other end is connected with hot water outlet pipe 10, evaporimeter 1 place is provided with fan 6, fan 6 is worked, and air stream 2 is blown through evaporimeter 1 heat exchange.
In described phase-change accumulation energy case 4, be filled with phase transition temperature and be the nano phase change energy storage material of 50-60 DEG C, the component of described nano phase change energy storage material and parts by weight are: nano particle 0.5-2.0 part, dispersant 0.9-3.6 part and phase-change working substance 94.4-98.6 part.Dispersant of the present invention is Polyethylene Octylphenol Ether (TX-10), and phase-change working substance is paraffin.
Weight ratio the best of nano particle of the present invention and dispersant is 1.0:1.8, reason is: dispersant can reduce the surface tension of liquid or change the surface characteristics of nano particle, prevent the reunion of nano particle and coagulation makes nano particle energy stable suspersion in fluid.When dispersant addition hour, nano particle is not exclusively coated, occurs to reunite to generate bulky grain between part particle, the dispersion stabilization of nano phase change material is poor; In the time that the weight ratio of nano particle and dispersant is 1.0:1.8, the dispersant adding, by sterically hindered effect, makes the nano phase change dispersion of materials stability of preparation best; Along with dispersant is further added, in fluid, dispersant reaches hypersaturated state, when between particle, collision probability increases also because Action of Gravity Field strengthens, particle generation sedimentation, the dispersion stabilization of nano phase change material reduces.
The present invention selects CNT as nano particle, the internal diameter of CNT is 2-5nm, external diameter <8nm, length is 0.5-2 μ m, purity >95wt%, thermal conductivity factor is up to 3000 W/mK, and be equipped with dispersant and the phase-change working substance of suitable component, and improve the heat transfer coefficient of water heater phase-change accumulation energy case, shorten the thermal response time, efficiency is higher, more energy-conservation.
Nano phase change energy storage Teat pump boiler is to grow up in the principle of heat pump, it and existing Teat pump boiler difference are to introduce nano phase change energy storage technology, and with the complete combination of heat pump techniques, its operation principle is: utilize air or other environment as low-temperature heat source, absorb airborne heat by the evaporation of evaporimeter inner refrigerant, again by compressor by low temperature, the gaseous working medium of low pressure becomes high temperature, the gaseous working medium of high pressure, when condensing heat-exchange coil pipe in this gaseous working medium is transferred to phase-change accumulation energy case, high temperature, high-pressure gaseous working medium heat release, heat is directly passed to nano phase change energy storage material by condensing heat-exchange coil pipe, the energy storage of nano phase change energy storage material generation solid-liquid phase change.In the time of the logical cold water of water route heat exchange coil, there is liquid-solid-phase changeable release heat in the nano phase change working medium of high temperature again, thereby arrive heating cold water, produces the object of hot water.
When the bright Teat pump boiler of this law is worked, start compressor 7, now the heat in surrounding air is to the cold-producing medium transmission in evaporimeter 1 in heat pump, under the promotion of compressor 7, interior evaporimeter 1 cold-producing medium that has absorbed amount of heat is transported in condenser coil 8, by condenser coil 8, the nano phase change energy storage material in phase-change energy storage device 4 is heated, nano phase change energy storage material undergoes phase transition, heat is stored, the heat discharging to nano phase change energy storage material is added the calorie value that electric energy that compressor 7 consumes transforms for the heat absorbing from environment.Nano phase change energy-accumulation type hot pump water heater has higher Energy Efficiency Ratio, and the heat time can be any time among one day, as being arranged on the heat time between 23:00～7:00 in evening, to the peak load shifting effect of having powered, alleviates China's shortage of electric power situation.
In the area of having implemented peak-trough electricity potential difference valency, can reduce expenses for user, in the time of user's heat water, nano phase change energy storage material heats the water in water route heat exchanger tube 9, and nano phase change energy storage material discharges latent heat by phase transformation, and in exothermic process, nano phase change energy storage material is temperature-resistant, and exothermic character is good, thermal discharge is large, and the heat release time is long, thereby user can obtain constant water temperature.
Providing three kinds of concrete phase transition temperatures is below nano phase change energy storage material of 50-60 DEG C and preparation method thereof.
The first: 0.5 wt % CNT-paraffin nano phase change energy storage material.
Component: CNT 0.5g; Polyethylene Octylphenol Ether (TX-10) 0.9g; Paraffin 98.6g.
Preparation method is:
1,0.5g CNT and 0.9g Polyethylene Octylphenol Ether (TX-10) are mixed, stir 5 minutes to dissolving completely.
2, the mixed solution of nano particle and dispersant being joined in the liquid paraffin of 98.6g melting, is then that 80KHz, temperature are that under the condition of 60 DEG C, ultrasonic vibration, about 2 hours, obtains nano phase change energy storage material-nano phase change suspension in ultrasonic frequency.Dispersiveness, the stability of this nano phase change suspension are better, can maintain about 30 days, and thermal conductivity factor is compared paraffin and improved 7.8% left and right.
The second: 1.0 wt % CNT-paraffin nano phase change energy storage materials.
Component: CNT 1.0g; Polyethylene Octylphenol Ether (TX-10) 1.8g; Paraffin 97.2g.
Preparation method is:
1,1.0g CNT and 1.8g Polyethylene Octylphenol Ether (TX-10) are mixed, stir 5 minutes to dissolving completely.
2, the mixed solution of nano particle and dispersant being joined in the liquid paraffin of 97.2g melting, is then that 80KHz, temperature are that under the condition of 60 DEG C, ultrasonic vibration, about 2 hours, obtains nano phase change energy storage material-nano phase change suspension in ultrasonic frequency.Dispersiveness, the stability of this nano phase change suspension are better, can maintain about 30 days, and thermal conductivity factor is compared paraffin and improved 15.2% left and right.
The third: 2.0wt % CNT-paraffin nano phase change energy storage material.
Component: CNT 2.0g; Polyethylene Octylphenol Ether (TX-10) 3.6g; Paraffin 94.4g.
Preparation method is as follows:
1,2.0g CNT and 3.6g Polyethylene Octylphenol Ether (TX-10) are mixed, stir 5 minutes to dissolving completely.
2, the mixed solution of nano particle and dispersant being joined in the liquid paraffin of 94.4g melting, is then that 80KHz, temperature are that under the condition of 60 DEG C, ultrasonic vibration, about 2 hours, obtains nano phase change energy storage material suspension in ultrasonic frequency.Dispersiveness, the stability of this suspension are better, can maintain about 25 days, and thermal conductivity factor is compared paraffin and improved 21.6% left and right.
In the bright Teat pump boiler phase-change accumulation energy case of this law, be filled with phase transition temperature and be the nano phase change energy storage material of 50-60 DEG C, phase-changing energy storage material potential heat value is large, in phase transition process, can absorb a large amount of heats, phase-changing energy storage material thermal conductivity factor is high, improve the heat transfer coefficient (than the not heat transfer property raising at least 15% of the Teat pump boiler of plus nano phase-change working substance) of phase-change accumulation energy case, shorten the thermal response time, efficiency is higher, more energy-conservation, can significantly reduce Teat pump boiler volume (volume size be equivalent to common water storage tank of water heater 1/3～1/2), floor space is little, lightweight, easy to use, flexible for installation, can be widely used in productive life field, utilize electric energy to produce 3-4 heat doubly by nano phase change working medium in the ebb electricity consumption phase, in the peak electricity consumption phase, its latent-heat storage is discharged, realize " peak load shifting ", a kind of safety, efficiently, energy-conservation and environment amenable water heater, can effectively alleviate and solve energy supply and demand both sides in the time, not mating on intensity and place, reach reasonable energy utilization and alleviate the objects such as environmental pollution.
Claims (6)
1. a nano phase change energy-accumulation type hot pump water heater, comprise phase-change accumulation energy case (4), condensing heat-exchange coil pipe (8) and water route heat exchange coil (9) are installed in described phase-change accumulation energy case (4), between the output of described condensing heat-exchange coil pipe (8) and input, be connected with expansion valve (3) in turn, evaporimeter (1) and compressor (7), one end of described water route heat exchange coil (9) is connected with cold water inlet (5), the other end is connected with hot water outlet pipe (10), it is characterized in that being filled with in described phase-change accumulation energy case (4) phase transition temperature and be the nano phase change energy storage material of 50-60 DEG C, the component of described nano phase change energy storage material and parts by weight are: nano particle 0.5-2.0 part, dispersant 0.9-3.6 part and phase-change working substance 94.4-98.6 part.
2. nano phase change energy-accumulation type hot pump water heater according to claim 1, the weight ratio that it is characterized in that described nano particle and dispersant is 1.0:1.8.
3. nano phase change energy-accumulation type hot pump water heater according to claim 1, it is characterized in that described nano particle selects CNT, the internal diameter of described CNT is 2-5nm, external diameter <8nm, length is 0.5-2 μ m, purity >95wt%.
4. nano phase change energy-accumulation type hot pump water heater according to claim 1, is characterized in that described dispersant is Polyethylene Octylphenol Ether.
5. nano phase change energy-accumulation type hot pump water heater according to claim 1, is characterized in that described phase-change working substance is paraffin.
6. nano phase change energy-accumulation type hot pump water heater according to claim 1, is characterized in that the preparation method of described nano phase change energy storage material is:
(1), by the nano particle of above-mentioned parts by weight and dispersant, stir 5 minutes to completely dissolve;
(2), the nano particle making in upper step and dispersant solution are joined in the melt phase change working medium of above-mentioned parts by weight, be then that 80KHz, temperature are ultrasonic vibration 2 hours under the condition of 60 DEG C in ultrasonic frequency, obtain nano phase change energy storage material.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135923A (en) * | 2015-09-22 | 2015-12-09 | 陈志强 | Compact heat accumulator |
| CN105950121A (en) * | 2016-06-30 | 2016-09-21 | 中山火炬职业技术学院 | Intelligently adjustable nanocapsule phase-change material and preparation method thereof |
| CN106123363A (en) * | 2016-06-30 | 2016-11-16 | 上海第二工业大学 | A kind of system improving solar generator generating efficiency based on nano-fluid |
| CN109021927A (en) * | 2017-06-09 | 2018-12-18 | 徐辉 | Phase-change heat-storage material composition and preparation method thereof for heat storage type electric heater |
| CN109780914A (en) * | 2019-03-11 | 2019-05-21 | 深圳市爱能森科技有限公司 | Phase-change accumulation energy heat-exchange system and the method for heating water |
| WO2020181899A1 (en) * | 2019-03-11 | 2020-09-17 | 深圳市爱能森科技有限公司 | Phase change energy storage heat exchange system and method for heating water |
| CN111840810A (en) * | 2020-07-27 | 2020-10-30 | 哈尔滨工业大学 | Biological tissue temperature field passive regulation and control method based on optical phase change nanoparticles |
-
2014
- 2014-08-01 CN CN201410378133.2A patent/CN104180521A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135923A (en) * | 2015-09-22 | 2015-12-09 | 陈志强 | Compact heat accumulator |
| CN105950121A (en) * | 2016-06-30 | 2016-09-21 | 中山火炬职业技术学院 | Intelligently adjustable nanocapsule phase-change material and preparation method thereof |
| CN106123363A (en) * | 2016-06-30 | 2016-11-16 | 上海第二工业大学 | A kind of system improving solar generator generating efficiency based on nano-fluid |
| CN105950121B (en) * | 2016-06-30 | 2019-10-15 | 中山火炬职业技术学院 | A kind of intelligent adjustable phase-change material and preparation method thereof of Nano capsule |
| CN109021927A (en) * | 2017-06-09 | 2018-12-18 | 徐辉 | Phase-change heat-storage material composition and preparation method thereof for heat storage type electric heater |
| CN109780914A (en) * | 2019-03-11 | 2019-05-21 | 深圳市爱能森科技有限公司 | Phase-change accumulation energy heat-exchange system and the method for heating water |
| WO2020181899A1 (en) * | 2019-03-11 | 2020-09-17 | 深圳市爱能森科技有限公司 | Phase change energy storage heat exchange system and method for heating water |
| CN111840810A (en) * | 2020-07-27 | 2020-10-30 | 哈尔滨工业大学 | Biological tissue temperature field passive regulation and control method based on optical phase change nanoparticles |
| CN111840810B (en) * | 2020-07-27 | 2022-03-01 | 哈尔滨工业大学 | Biological tissue temperature field passive regulation and control method based on optical phase change nanoparticles |
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