CN110542144A - Phase-change energy storage capillary network radiant floor cooling/heating integrated and fresh air coupling system - Google Patents
Phase-change energy storage capillary network radiant floor cooling/heating integrated and fresh air coupling system Download PDFInfo
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- CN110542144A CN110542144A CN201910729537.4A CN201910729537A CN110542144A CN 110542144 A CN110542144 A CN 110542144A CN 201910729537 A CN201910729537 A CN 201910729537A CN 110542144 A CN110542144 A CN 110542144A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/12—Tube and panel arrangements for ceiling, wall, or underfloor heating
- F24D3/14—Tube and panel arrangements for ceiling, wall, or underfloor heating incorporated in a ceiling, wall or floor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0003—Exclusively-fluid systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/007—Ventilation with forced flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
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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
Abstract
A phase-change energy storage capillary network radiation floor cooling/heating integrated and fresh air coupling system comprehensively utilizes a cold and hot water radiation cooling/heating system, phase-change energy storage and fresh air pretreatment technology. The coupling system takes a cold and hot water machine or a heat pump as a cold and hot source power source as a fan, and the phase-change energy-storage capillary network radiation floor and the fresh air coupling system are used as the tail ends of the coupling system. The tail end is respectively a floor layer, a leveling layer, an energy storage phase-change material structure layer, a capillary network, a fresh air cavity and a heat insulation layer from top to bottom, wherein the capillary network, the fresh air cavity and the heat insulation layer are arranged in the energy storage phase-change material structure layer, cold/heat supply is realized by cold/heat accumulation at night, and fresh air is started all day long. The invention fully utilizes the peak-valley electricity price difference, transfers the cold/heat load in the daytime to the night with lower electricity price, reduces the running cost, can realize the air-conditioning load demand in winter and summer by using one set of system, and saves the construction cost. The system provided by the invention has better economy and higher exemplary popularization and application values on the premise of meeting the indoor comfort.
Description
Technical Field
The invention discloses an integrated end device and an application system which combine the traditional capillary cooling/heating and phase-change energy storage technologies, belongs to the new technical field of building heating and air conditioning, and the technical field of building energy optimization utilization and energy storage, and particularly relates to a novel structural design of an energy storage floor and a fresh air coupling system.
Background
The energy consumption of the building terminals in China already exceeds 30 percent of the total energy consumption, wherein the energy consumption of air conditioners and heating accounts for 40 to 50 percent of the total energy consumption of the buildings. In order to reduce the energy consumption of buildings and the development of radiant cooling/heating of floors is continuously mature, the novel air conditioner terminal form adopting low-temperature hot water and high-temperature cold water has the advantages of improving the quality of indoor air, creating a comfortable environment and reducing the energy consumption, and accords with the direction of energy-saving development.
In order to solve the problem of unbalanced peak-valley load of a power grid, the government of China has introduced a 'peak-valley electricity price policy', and has vigorously advocated innovation and development of the underestimated electricity utilization energy-saving industry. Phase change materials are widely researched and applied in various researches as a high-efficiency energy storage substance integrated with buildings, and latent heat energy storage is increasingly attractive for heating and refrigerating systems. In addition, the combination of the phase change material and the cold and heat source can also play a role of 'peak clipping and valley filling', and help users to reduce the electric energy cost. The floor radiation cooling/heating technology is combined with the phase change energy storage technology, the electricity is underestimated at night to store cold/heat, and the cold/heat is released in the daytime to play the role of peak clipping and valley filling. In a patent cold-heat integrated double-layer capillary tube phase change energy storage floor terminal device and an application system (CN201310168460), Yaohangchao, Zhang Xiaosong and the like in southeast university propose a novel double-layer phase change material radiation floor, however, the double-layer phase change material radiation floor system also has several limitations, which are mainly shown in that if a heat storage layer is arranged above, a cold storage layer is arranged below, and when refrigerating in summer, part of cold is stored in the heat storage layer above in a sensible heat manner, so that the heat exchange resistance is increased, and the system response time is prolonged; when heating in winter, partial heat can also enter the cold accumulation layer below through the mode of heat conduction, has increased the heat loss. In addition, the structure does not take into account the positive effect of fresh air introduction on improving the indoor air quality.
Disclosure of Invention
The technical problem is as follows: the invention aims to provide a phase change energy storage capillary network radiation floor and fresh air coupling application system which can efficiently utilize off-peak electricity and combine floor radiation cooling/heating with a capillary network, a phase change energy storage technology and an air source/ground source heat pump so as to establish a cooling/heating integrated phase change energy storage capillary network radiation floor.
The technical scheme is as follows: according to the scheme, a cold-hot integrated single-layer phase change energy storage radiation floor and fresh air coupling system is designed, two phase change materials with phase change temperatures are adopted in the system, the problem of inconsistent phase change temperatures required under the working conditions of heating and air conditioning is solved, heat is stored in winter in the night underestimation electricity price period (24: 00-8: 00), cold is stored in summer, and the heat is released to a room in the daytime peak electricity price period (8: 00-18: 00). The use of phase change materials can reduce heat flow fluctuations on the floor surface and increase the heat release and cooling capacity of the floor radiation system during peak load periods compared to when the floor radiation system is free of phase change materials.
The phase change energy storage capillary network radiant floor cooling/heating integrated terminal is respectively provided with an air valve, a fan, a heat exchanger, a floor layer, a leveling layer, an energy storage phase change material structure layer, a fresh air cavity, a reflecting film and a heat insulation layer from top to bottom, a capillary network for supplying hot water is laid in the heat storage phase change material side, and a capillary network for supplying cold water is laid in the cold storage phase change material side.
When the heat supply is in operation, hot water passes through the capillary network at the heat storage side and stores heat and releases heat through the phase change material, the capillary network at the cold storage side is used as an auxiliary according to load requirements, and fresh air enters the room after passing through the lower cavity and the heat exchanger; when the cooling operation, cold water carries out cold accumulation and cold discharge through phase change material through cold side capillary network, and heat accumulation side capillary network is as supplementary according to the load needs, and the new trend directly gets into indoorly through the heat exchanger.
The energy storage phase change material is formed by splicing a half-arc long-strip-shaped heat storage phase change module and a half-arc long-strip-shaped cold storage phase change module at intervals, the heat storage phase change module is subjected to metal packaging by a heat storage phase change material with the phase change temperature of 35 ℃, the cold storage phase change module is subjected to metal packaging by a cold storage phase change material with the phase change temperature of 19 ℃, and the capillary network is respectively coiled and laid in the energy storage module.
The system takes a cold/hot water machine as a cold and hot source and a fan as a power source, the cold/hot water machine is of an air-cooled heat pump type or a ground source heat pump type, and the fan is a centrifugal blower.
The output end of the cold/hot water machine is connected with the input end of the phase change energy storage capillary network radiant floor integrated terminal sequentially through the valve and the water distributor, and the input end of the cold/hot water machine is connected with the output end of the phase change energy storage capillary network radiant floor integrated terminal sequentially through the valve and the water collector.
The types and the masses of the phase-change materials packaged in the heat storage phase-change module and the cold storage phase-change module can be selected, designed and calculated according to the climate of the region where the terminal building is applied and the air conditioning and heating loads.
The cold/warm supply capacity and the running time of the cold/hot water machine are adjusted by the controller according to the predicted value of the cold/warm load demand, and instructions are sent to the valve, so that whether the heat storage phase change material side and the cold storage phase change material side are respectively used as auxiliary energy storage components or not is realized.
The cold/warm supply integrated tail end of the phase-change energy storage capillary network radiation floor can work together with a ventilation system, and a cold/hot water machine runs at night, so that the cold/warm supply side of the phase-change energy storage capillary network radiation floor stores cold or heat; in the daytime, the cold/hot water machine is closed, the radiation floor is used for releasing cold/heat, the primary air return system is opened all day long, the heat exchanger is used for dehumidifying, cooling and heating air, part of indoor load is supplemented, and the phenomenon of condensation is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a novel phase-change energy storage capillary network radiant floor cooling/heating integrated and fresh air coupling application system.
Fig. 2 is a flow chart of an application system of the novel phase-change energy storage capillary network radiant floor cooling/heating integrated and fresh air coupling system.
Fig. 3 is a plan layout view of the novel phase-change energy-storage capillary network radiant floor cooling/heating integrated and fresh air system of the invention.
Fig. 4 is an axial view of a phase change energy storage layer structure of the novel phase change energy storage capillary network radiant floor cooling/heating integrated and fresh air coupling system of the invention.
fig. 5 is a side view of fig. 4.
Fig. 6 is a schematic diagram of the novel phase-change energy storage capillary network radiant floor cooling/heating integrated and fresh air coupling system for winter daytime heating (energy release).
Fig. 7 is a schematic diagram of the novel phase-change energy storage capillary network radiant floor cooling/heating integrated and fresh air coupling system for heat storage and ventilation at night in winter.
Fig. 8 is a schematic diagram of the cooling/heating integrated and fresh air coupled system of the novel phase-change energy storage capillary network radiant floor of the invention for refrigerating (discharging) in summer and daytime.
Fig. 9 is a schematic diagram of the novel phase-change energy-storage capillary network radiant floor cooling/heating integrated and fresh air coupling system for cold accumulation and ventilation at night in summer.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings and examples.
As shown in figure 1, the phase change energy storage capillary network radiation floor cooling/heating integrated and fresh air coupling system comprises an air valve 1, a fan 2, a heat exchanger 3, an air port 4, a floor layer 5, a leveling layer 6, an energy storage phase change material structure layer 7, a fresh air cavity 8, a stainless steel support 9, a reflecting film 10, a heat insulation layer 11 and a floor plate 12 from top to bottom, wherein a capillary network 13 for supplying hot water is laid in the heat storage phase change material side, a capillary network 14 for supplying cold water is laid in the cold storage phase change material side, and the fresh air cavity is provided with a baffle 15 for enhancing the fresh air heat exchange surface area and improving the air flow organization.
Referring to fig. 2, the phase change energy storage capillary network radiant floor cooling/heating integrated and fresh air coupling system of the present invention is formed by connecting a cooling/heating integrated end 19 and a cooling/heating system, wherein the cooling/heating integrated and fresh air coupling system is formed by using an air-cooled heat pump or a ground source heat pump type cooling/heating water machine 18 as a cooling and heating source.
As shown in fig. 2, the output end of the cold/hot water machine 18 is connected to the input end of the cold/warm integrated terminal 19 through a valve 20 and a water separator 21 in order, and the input end of the cold/hot water machine is connected to the output end of the cold/warm integrated terminal 19 through a valve 22, a water pump 23, and a water collector 24 in order.
Referring to fig. 3, 6 and 7, in the heating operation, the heat storage side capillary network 13 stores and releases heat by hot water, and the heat storage side capillary network 14 can be used as an aid according to the load demand.
Referring to fig. 3, 8 and 9, in the cooling operation, the cold storage-side capillary network 14 performs cold storage and cold release by cold water, and the heat storage-side capillary network 15 can be used as an aid according to the load demand.
As shown in fig. 3 and 4, the energy storage phase change material is formed by splicing a half-arc long-strip-shaped heat storage phase change module 16 and a half-arc long-strip-shaped cold storage phase change module 17 at intervals, the heat storage phase change module is formed by metal packaging of a heat storage phase change material with a phase change temperature of 35 ℃, the cold storage phase change module is formed by metal packaging of a cold storage phase change material with a phase change temperature of 19 ℃, a capillary network is respectively wound and laid in the energy storage module, and the metal frame 9 is supported and fixed.
The reflecting film 10 is made of aluminum foil or other high-reflection materials, so that the effects of reflecting and blocking heat are achieved, the heat exchange of the phase change material layer, the fresh air and the heat insulation layer is reduced, the heat insulation layer 11 is made of materials with low heat conductivity and low density, and the cold/heat loss towards the lower layer is reduced.
The working principle and the working process of the invention are as follows:
In winter working conditions, during the night off-peak electricity period, namely 24: 00-8: 00, a hot water machine 18 taking an air-cooled heat pump or a ground source heat pump as a cold and heat source is started, hot water with the temperature of 35-45 ℃ is provided, the hot water enters an indoor water separator 21, then enters a heat storage side capillary network 13 and a heat exchanger in the floor to heat a heat storage side phase change material 16, when the temperature of the heat storage side phase change material 16 rises to the phase change temperature, the phase change material begins to melt and stores the phase change heat, fresh air passes through a fresh air cavity in the floor to perform primary heat exchange with a phase change energy storage layer, and then enters the heat exchanger to perform enhanced heat exchange and then is sent to the indoor; during the peak-valley electricity period in daytime, namely 8: 00-18: 00, the water heater 18 stops working, the capillary network 13 on the heat storage side does not supply hot water to provide heat, the indoor temperature and the temperature in each structural layer of the floor begin to drop, when the temperature of the phase change material on the heat storage side drops to a phase change temperature point, the phase change material begins to solidify and release heat at the same time, the phase change material releases heat upwards to provide heat for the indoor, so that the indoor temperature rises or drops slowly, at the moment, the fresh air still passes through a fresh air cavity in the floor to perform primary heat exchange with the phase change energy storage layer, and then enters the heat exchanger to perform enhanced heat exchange and then is delivered to. When the load is large in winter, hot water can be introduced into the cold storage side capillary network 14 to assist in heating.
In summer working conditions, in a night valley electricity period, namely 24: 00-8: 00, a water cooling machine 18 taking an air-cooled heat pump or a ground source heat pump as a cold and heat source is started, cold water with the temperature of 12-18 ℃ is provided, the cold water enters an indoor water distributor 21, then enters a cold storage side capillary network 14 and a heat exchanger in a floor, a cold storage side phase-change material 17 is cooled, when the temperature of the cold storage side phase-change material 17 is reduced to the phase-change temperature, the phase-change material begins to solidify, phase-change cold energy is stored, and the fresh air is directly cooled, dehumidified and then delivered to the indoor through the heat exchanger due to high relative humidity of the fresh; during the peak-valley electricity period in daytime, namely 8: 00-18: 00, the water chiller 18 stops working, the cold storage side capillary network 14 is not communicated with cold water to provide cold energy, the indoor temperature and the temperature in each structural layer of the floor start to rise, when the temperature of the cold storage side phase change material rises to a phase change temperature point, the phase change material starts to melt and absorbs heat at the same time, the phase change material absorbs the heat at the upper part to provide cold energy for the indoor, so that the indoor temperature is reduced or increased and slowed, at the moment, fresh air is still directly cooled and dehumidified through the surface air cooler and then is delivered to the indoor, and when the load is large in summer, the cold water can be communicated to the cold storage side capillary network.
The system well utilizes low-grade cold and heat sources, combines a phase change energy storage technology and introduces fresh air, improves indoor comfort, and plays a good role in peak clipping, valley filling, energy conservation and emission reduction.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a phase transition energy storage capillary network radiation floor cooling/warm integration and new trend coupled system, a serial communication port, phase transition energy storage capillary network radiation floor and new trend coupling integration terminal from the top down are respectively for blast gate (1), fan (2), heat exchanger (3), wind gap (4), floor layer (5), screed-coat (6), energy storage phase change material structural layer (7), new trend cavity (8), stainless steel support (9), reflectance coating (10) and adiabatic heat preservation (11), floor (12) lay capillary network (13) that are used for the heat supply water in heat storage phase change material side, lay capillary network (14) that are used for supplying cold water in cold storage phase change material side.
2. The phase-change energy storage capillary network radiant floor cooling/heating integrated and fresh air coupling system as claimed in claim 1, wherein the fresh air cavity is provided with a baffle (15) for enhancing the fresh air heat exchange surface area and improving the air flow organization.
3. The phase-change energy-storage capillary network radiant floor cooling/heating integrated and fresh air coupling system as claimed in claim 1, wherein the energy-storage phase-change material is formed by splicing a half-arc strip-shaped heat-storage phase-change module (16) and a half-arc strip-shaped cold-storage phase-change module (17) at intervals, the heat-storage phase-change module is metal-packaged by a heat-storage phase-change material with a phase-change temperature of 35 ℃, the cold-storage phase-change module is metal-packaged by a cold-storage phase-change material with a phase-change temperature of 19 ℃, and the capillary network is respectively coiled and laid in the energy-.
4. The phase-change energy storage capillary network radiant floor cooling/heating integrated and fresh air coupling system as claimed in claim 1, wherein a cooling/heating water machine (18) is used as a cold and heat source, a fan (2) is used as a power source, and the cooling/heating water machine and the fresh air coupling integrated end (19) are respectively connected with the phase-change energy storage capillary network radiant floor to form a cooling/heating system, the cooling/heating water machine (18) is of an air-cooled heat pump type or a ground source heat pump type, and the fan is a centrifugal blower.
5. The phase-change energy storage capillary network radiant floor cooling/heating integrated and fresh air coupling system as claimed in claim 1, wherein the output end of the cold/hot water machine (18) is connected with the input end of the phase-change energy storage capillary network radiant floor integrated end (19) sequentially through a valve (20) and a water distributor (21), and the input end of the cold/hot water machine is connected with the output end of the phase-change energy storage capillary network radiant floor integrated end (19) sequentially through a valve (22), a water pump (23) and a water collector (24).
6. The phase-change energy storage capillary network radiation floor cooling/heating integrated and fresh air coupling system as claimed in claim 1, wherein the fan (2) is arranged inside the wall, the output end of the fan is connected with the input end of the phase-change energy storage capillary network radiation floor cooling/heating integrated and fresh air coupling system through a heat exchanger, and the input end of the fan is connected with a power supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910729537.4A CN110542144A (en) | 2019-08-08 | 2019-08-08 | Phase-change energy storage capillary network radiant floor cooling/heating integrated and fresh air coupling system |
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| CN201910729537.4A CN110542144A (en) | 2019-08-08 | 2019-08-08 | Phase-change energy storage capillary network radiant floor cooling/heating integrated and fresh air coupling system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115143557A (en) * | 2022-07-07 | 2022-10-04 | 南京师范大学 | Cold and heat accumulation radiation plate based on non-eutectic phase change material |
| CN115388530A (en) * | 2022-08-25 | 2022-11-25 | 重庆大学 | Intelligent control method of radiant heat and cold supply system based on peak-valley electricity price |
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| CN106839215A (en) * | 2017-03-01 | 2017-06-13 | 重庆大学 | A kind of energy storage materials of phase change plate and humidity control system |
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| US4182406A (en) * | 1978-02-17 | 1980-01-08 | Holbrook Edward M | Solar energy system for heating and cooling of buildings utilizing moist air cycles |
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| CN115143557A (en) * | 2022-07-07 | 2022-10-04 | 南京师范大学 | Cold and heat accumulation radiation plate based on non-eutectic phase change material |
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