CN110762581A - System for heat pipe provides stable hot water in coordination with medium-high temperature phase change heat storage medium - Google Patents
System for heat pipe provides stable hot water in coordination with medium-high temperature phase change heat storage medium Download PDFInfo
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- CN110762581A CN110762581A CN201910960424.5A CN201910960424A CN110762581A CN 110762581 A CN110762581 A CN 110762581A CN 201910960424 A CN201910960424 A CN 201910960424A CN 110762581 A CN110762581 A CN 110762581A
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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
- F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
- F24D3/087—Tap water heat exchangers specially adapted therefore
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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
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1045—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump and solar energy
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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
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
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Abstract
The invention relates to a system for providing stable hot water by a heat pipe in cooperation with a medium-high temperature phase change heat storage medium, which comprises a water supply subsystem for supplying cold water; a cyclical heating subsystem for providing hot water to a user; the medium-high temperature phase change heat storage subsystem realizes heat storage by utilizing sensible heat and latent heat of a medium-high temperature phase change heat storage medium; a heat transfer water storage subsystem in fluid communication between the water supply subsystem and the cyclical heat supply subsystem; and the heat pipe heat radiation subsystem comprises at least a closed heat pipe and a heat pipe phase change medium contained in the heat pipe, wherein two ends of the heat pipe are respectively arranged in the heat transfer water storage subsystem and the medium-high temperature phase change heat storage subsystem so as to transfer heat from the medium-high temperature phase change heat storage subsystem to the heat transfer water storage subsystem through the heat pipe phase change medium, and therefore cold water entering the heat transfer water storage subsystem is heated into hot water. According to the system, a medium-high temperature phase change heat storage medium is selected, and a heat pipe heat dissipation subsystem is added to ensure timeliness and stability of hot water supply.
Description
Technical Field
The present invention relates to hot water supply, and more particularly to a system for providing stable hot water by a heat pipe in cooperation with a medium-high temperature phase change heat storage medium.
Background
With the increase of the living standard of people, the low cost and stable and continuous hot water supply has become an important part of life. The last five years of research on the provision of hot water through phase change materials has been in successive applications for patents (including solar phase change water heaters such as CN 109084477 a and CN 108800292A, electrically heated phase change water heaters, phase change hot water heating such as CN 207162719U, etc.). The advantages of phase change heat storage are described in detail in these patent documents, including use of off-peak electricity, no-sun night heating, and stable outlet water temperature. However, no matter what kind of structure and material are adopted in the above reports, the phase-change material below the boiling point of water is used as the heat storage medium, the heat storage density is low, and continuous and efficient hot water supply is not easy to obtain.
CN201410479367 discloses a hot water supply technology of a solar heat storage type vacuum heat pipe in which a high-temperature phase change heat storage medium is placed in a heat pipe, which is used to increase the heat storage density of the heat pipe, but does not relate to how to solve the problem of overhigh heat supply temperature and pressure caused by the fact that the phase change heat storage temperature is higher than the boiling point of water.
Both in the southern part of the season (bottom of 10 months to bottom of 3 months in the second year) and in most of the northern part of the season (four seasons such as northwest, inner Mongolia, northeast; 9 th of the month in north China to May of the second year) require a low-cost, continuously stable supply of hot water. The utilization of valley electricity, solar energy and the like is generally realized by increasing the volume of the low-temperature phase change material due to the low energy storage density and the continuous hot water supply at intervals of more than 8 hours. The sensible heat and the latent heat of the high-temperature phase-change heat storage (the using temperature is more than or equal to 100) can be comprehensively utilized to store heat, compared with a low-temperature heat storage material, the high-temperature phase-change heat storage material has the advantage of high heat storage density, the high-temperature phase-change material is mostly utilized to heat steam for drying and heating to utilize waste heat, the steam supply is relatively concentrated, and the temperature fluctuation is small. For the intermittent hot water heating with small temperature requirement fluctuation, the high-temperature heat storage material is difficult to store and release application heat due to the defects that the heat exchange efficiency is low, the outlet water temperature is low when large-flow water passes through and is not used for a long time or the outlet water temperature is too high when the water flow is small, and the wide application of the high-temperature heat storage material is limited.
In a word, the hot water supply system of the low phase change point heat storage material has low heat storage density, large heat storage device volume and short heat storage time, and is difficult to meet the long-time heat supply requirement. The high-temperature phase-change material is mostly higher than or close to the boiling point of water, and a pipeline is contacted with water, so that the use problem caused by too high outlet water temperature and the equipment safety and cost problems caused by too high water high-temperature pressure exist.
Disclosure of Invention
In order to solve the problems of insufficient heat storage capacity of the low-temperature phase-change material, low heat exchange efficiency, overhigh water outlet temperature of the high-temperature phase-change material and adverse effects of high temperature, high pressure and corrosion on equipment in the prior art, the invention aims to provide a system for providing stable hot water by cooperating a heat pipe with a medium-high temperature phase-change heat storage medium.
The invention provides a system for providing stable hot water by a heat pipe in cooperation with a medium-high temperature phase change heat storage medium, which comprises a water supply subsystem for supplying cold water; a hydronic heating subsystem for providing a hot water to a user; a medium-high temperature phase change heat storage subsystem for storing heat by utilizing sensible heat and latent heat of a medium-high temperature phase change heat storage medium; a heat transfer water storage subsystem in fluid communication between the water supply subsystem and the cyclical heat supply subsystem; and the heat pipe heat radiation subsystem comprises at least one closed heat pipe and a heat pipe phase change medium accommodated in the heat pipe, and two ends of the heat pipe are respectively arranged in the heat transfer water storage subsystem and the medium-high temperature phase change heat storage subsystem so as to transfer heat from the medium-high temperature phase change heat storage subsystem to the heat transfer water storage subsystem through the heat pipe phase change medium, so that cold water entering the heat transfer water storage subsystem is heated into hot water. In particular, by means of the heat pipe, the heat pipe phase change medium rapidly transfers heat from the medium-high temperature phase change heat storage subsystem to the heat transfer water storage subsystem.
Compared with the existing water supply system (wherein the temperature of the phase change material is less than 100 ℃), the system selects a medium-high temperature phase change heat storage medium (such as the phase change heat storage material with the phase change temperature higher than 100 ℃), and a heat pipe heat radiation subsystem is added to ensure the timeliness (namely, the hot water is rapidly supplied) and the stability of the hot water supply.
Preferably, the heat and water storage subsystem comprises a water storage tank and a conduit disposed in the water storage tank, cold water from the water supply subsystem entering the conduit and being heated in the conduit to provide heated water to the circulation heat supply subsystem.
Preferably, the heat transfer water storage subsystem further comprises a vent valve for venting the heat transfer water storage subsystem. In particular, the vent valve is used to drain the heat and water storage subsystem when hot water is not used for a long period of time.
Preferably, the hydronic heating subsystem includes a drain valve for both draining and supplying hot water. Residual water in the heat transfer water storage subsystem can be drained through the vent valve and the drain valve, and the problems that the temperature of outlet water is too high during heat supply and the pipeline is subjected to pressure bearing and corrosion due to high-temperature gasification of water which is not used for a long time are solved.
Preferably, the circulation heating subsystem further comprises at least one heat exchanger or heat exchange unit for heating when applied to the heating field.
Preferably, the medium-high temperature phase-change heat storage subsystem comprises a housing and a heating source, and the medium-high temperature phase-change heat storage medium is accommodated in the housing and is heated by the heating source. Preferably, the heating source is electric heating, air heating, solar heating, or the like. Preferably, the housing is a corrosion-resistant housing.
Preferably, the phase-change temperature of the medium-high temperature phase-change heat storage medium is more than or equal to 100 ℃ or the highest service temperature is more than or equal to 100 ℃. Preferably, the phase-change temperature of the medium-high temperature phase-change heat storage medium is higher than 100 ℃. Preferably, the phase-change temperature of the medium-high temperature phase-change heat storage medium is higher than 150 ℃. More preferably, the phase-change temperature of the medium-high temperature phase-change heat storage medium is between 150 ℃ and 400 ℃. Most preferably, the phase-change temperature of the medium-high temperature phase-change heat storage medium is between 200 ℃ and 350 ℃. In a preferred embodiment, the phase change temperature of the medium-high temperature phase change thermal storage medium is 308 ℃.
Preferably, the medium-high temperature phase-change heat storage medium comprises a medium-high temperature phase-change material. More preferably, the medium-high temperature phase change material is NaNO3，NaNO3-KNO3，NaNO3-KNO3-NaNO2And inorganic phase change materials or high phase change point organic phase change heat storage materials. It should be understood that the medium-high temperature phase change heat storage medium may be a molten salt, a metal, a polymer, or the like. According to different phase-change temperatures, the device is provided with a controller for heating temperature and heating time, and when the set temperature or time is reached, the heating is automatically stopped and the heat preservation is carried out. In order to improve the heat exchange efficiency of the phase change heat storage material of the device, high-heat-conductivity porous foam, powder and the like can also be added.
Preferably, the medium-high temperature phase change thermal storage medium further comprises a high thermal conductive material for enhancing heat transfer. More preferably, the high thermal conductive material is graphite powder. In a preferred embodiment, the high thermal conductivity material is 5 wt% graphite powder.
Preferably, the heat pipe phase change medium is a heat pipe low-temperature phase change material, such as a low-boiling point medium such as water, acetone, ethanol, and the like.
Preferably, the phase change temperature of the heat pipe low-temperature phase change material is lower than 100 ℃. More preferably, the phase transition temperature of the heat pipe low-temperature phase change material is between 70 and 90 ℃. In a preferred embodiment, the phase change temperature of the low-temperature phase change material of the heat pipe is 80 ℃, and the vacuum degree is controlled so as to control the phase change temperature of a medium in the heat pipe.
Preferably, a heat insulation device is arranged between the heat transfer water storage subsystem and the medium-high temperature phase change heat storage subsystem.
According to the invention, the sensible heat and the latent heat of the medium-high temperature phase-change heat storage medium are utilized by the medium-high temperature phase-change heat storage subsystem to realize heat storage, so that the heat storage density and the stability of a heat supply system are improved; the heat pipe heat dissipation subsystem can ensure the uniformity of the internal temperature of the medium-high temperature phase change heat storage medium material, prevent the medium-high temperature phase change heat storage medium from being locally overheated, ensure high-efficiency and stable heat supply and prevent the sudden rising and falling of the outlet water temperature. In a word, the system for providing stable hot water by the heat pipe in cooperation with the medium-high temperature phase change heat storage medium can effectively solve the problems of high outlet water temperature, large water temperature change, poor outlet water flow rate stability, high water pressure and the like of the conventional hot water supply system. Moreover, the system for providing stable hot water by the heat pipe in cooperation with the medium-high temperature phase change heat storage medium can reduce the volume of the heat storage device, improve the utilization efficiency of heat energy, save heat energy and reduce cost. Furthermore, the system for providing stable hot water by the heat pipe in cooperation with the medium-high temperature phase change heat storage medium can provide low-cost hot water with stable temperature and controllable outlet water flow and flow rate, and meets the requirement of a user on high-quality hot water.
Drawings
Fig. 1 is a schematic structural diagram of a system for providing stable hot water by cooperation of a heat pipe and a medium-high temperature phase change heat storage medium according to a preferred embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the system for providing stable hot water by the cooperation of heat pipes and a medium-high temperature phase change thermal storage medium according to a preferred embodiment of the present invention comprises a water supply subsystem 1, a heat transfer and water storage subsystem 2, a circulation heat supply subsystem 3, a medium-high temperature phase change thermal storage subsystem 4 and a heat pipe heat dissipation subsystem 5, the water supply subsystem 1 is used for supplying cold water 11, the circulating heat supply subsystem 3 is used for supplying hot water 31 to a user, the medium-high temperature phase-change heat storage subsystem 4 utilizes sensible heat and latent heat of a medium-high temperature phase-change heat storage medium to store heat, the heat transfer water storage subsystem 2 is in fluid communication between the water supply subsystem 1 and the circulating heat supply subsystem 3, and the heat pipe heat dissipation subsystem 5 is connected between the heat transfer water storage subsystem 2 and the medium-high temperature phase-change heat storage subsystem 4 to transfer heat from the medium-high temperature phase-change heat storage subsystem 4 to the heat transfer water storage subsystem 2, so that the cold water 11 entering the heat transfer water storage subsystem 2 is.
Wherein, according to the external temperature change, the inflow and the water flow speed of the cold water 11 of the water supply subsystem 1 can be adjusted through the valve 12 as required. The water supply subsystem 1 is city tap water or purified water, and can control valve 12 according to requirementAdjusting the water yield and the flow rate of 0-3 m3/h。
Wherein the heat and water storage subsystem 2 comprises a water storage tank 21 and a pipeline 22 arranged in the water storage tank 21, and cold water 11 from the water supply subsystem 1 enters the pipeline 22 and is heated in the pipeline 22 to provide hot water 31 to the circulating heat supply subsystem 3. The heat-transfer water storage subsystem 2 further comprises a thermal insulation material coated outside the water storage tank 21 to avoid heat loss. In this embodiment, the heat insulating material is made of common aluminum silicate heat insulating cotton. It should be understood that different insulation materials may be replaced depending on the insulation requirements, material costs. The heat and water storage subsystem 2 also includes a vent valve 23 which cooperates with a drain valve (hot water tap) 32 of the hydronic heating subsystem 3 (described in more detail below) to drain the heat and water storage subsystem 2. In this embodiment, the pressure of the heat transfer water storage subsystem 2 is greater than a set value (e.g., 1.8atm), and the vent valve 23 automatically opens the relief pressure.
Therein, the hydronic heating subsystem 3 includes a drain valve 32 for draining the hot water 31. The temperature of the domestic hot water is premixed with the normal-temperature tap water according to the requirement of the outlet water temperature and is used through a hot water faucet 32. In addition, the vent valve 23 and the drain valve 32 can empty the water in the heat transfer water storage subsystem 2, i.e. empty the hot water 31 to ensure the safety of the heat transfer water storage subsystem 2 when the hot water is not used for a long time, and also can prevent the cold water 11 from being heated to an excessively high temperature in the water outlet pipe 21. The hydronic heating subsystem 3 also includes two heat exchangers or heat exchange units 33 for heating. The circulation heating subsystem 3 is suitable for household heating needs and comprises two modes, namely a convection heat transfer mode and a forced convection mode, wherein the difference is that pipelines are built in the convection heat transfer mode by using different temperatures and different water densities to form a loop; and in the forced convection mode, a water pump is used as a power source for driving to form a loop. In this embodiment, the heat exchanger 33 is a heat exchange pipe, and a water pump 34 is used to perform forced convection heat exchange. It should be understood that the heat exchanger 33 may be selected from natural convection heat exchange or multiple heat exchange coils, etc. to achieve different configurations of heat supply, depending on cost and heating practice. Of course, the heat exchanger 33 may have its heat exchange pipes added or replaced according to the heating area or the number of heating units. The water pump 34 drives the heat supply, and the water quantity can be adjusted according to the power of the water pump 34 to carry out corresponding temperature adjustment. The circulation heating subsystem 3 also comprises a valve 35, the model of the valve 35 can be changed according to the requirement to match with the water pump 34, and the water flow can be adjusted by adjusting the valve 35. In addition, the heat exchanger 33 may be provided with a temperature display instrument for displaying the indoor temperature. The system automatically adjusts the power of the water pump 34 and the valve 35 according to the set indoor temperature requirement, so as to realize temperature adjustment and control the temperature range of the discharged water to be 20-60 ℃.
The medium-high temperature phase-change heat storage subsystem 4 includes a housing 41 and a heating source 42, and the medium-high temperature phase-change heat storage medium 411 is accommodated in the housing 41 and is heated by the heating source 42. In the present embodiment, the heating source 42 heats the medium-temperature phase-change heat storage medium 411 by using valley current. It should be understood that the heating source 42 may also be selected to perform heating by solar heating, industrial waste heat heating, etc., depending on local conditions.
In this embodiment, the medium-high temperature phase-change heat storage medium 411 includes a medium-high temperature phase-change material NaNO3Its phase transition temperature point is about 308 ℃. In practical application, the user can adjust the type and amount of the medium-high temperature phase change heat storage medium 411 according to the cost, the heat storage density, the heating area and the heating unit. Considering that the medium-high temperature phase change material generally has a low thermal conductivity, the medium-high temperature phase change heat storage medium 411 may be added with a high thermal conductive material as a reinforced heat transfer material according to actual needs to improve the heat transfer capability of the medium-high temperature phase change heat storage subsystem 4, so as to rapidly transfer heat to the heat pipe heat dissipation subsystem 5. In this embodiment, the enhanced heat transfer material is 5% graphite powder, which can mix NaNO3The thermal conductivity of (a) is improved by 90%. It should be understood that the medium-high temperature phase change heat storage medium 411 is selected from various forms of metal, high thermal conductivity carbon, powder, foam, etc. or composite structures thereof according to corrosion and heat transfer requirements. Moreover, the user can adjust the type and amount of the medium-high temperature phase change heat storage medium 411 to obtain a proper heat storage density, and the system is optimized by calculating according to the thermal physical parameters of water and the heating temperature.
In this embodiment, the housing 41 is a stainless steel shell. Moreover, the medium-high temperature phase-change heat storage subsystem 4 further comprises a heat insulation material coated outside the housing 41 to avoid heat loss. In this embodiment, the thermal insulation material is aluminum silicate fiber. It should be understood that different insulation materials may be replaced depending on the insulation requirements, material costs.
The heat pipe heat dissipation subsystem 5 includes a heat pipe 51 and a heat pipe phase change medium 511 accommodated in the heat pipe 51. The top ends of the heat pipes are arranged in the water storage tank 21 of the heat transfer and water storage subsystem 2, are in contact with the pipeline 22 and are fixedly connected (for example, welded), and the bottom ends of the heat pipes are arranged in the shell 41 of the medium-high temperature phase-change heat storage subsystem 4 and are fixedly connected (for example, welded) with the shell 41, so that heat transfer between the heat transfer and water storage subsystem 2 and the medium-high temperature phase-change heat storage subsystem 4 is realized through the heat pipe phase-change medium 511. Specifically, the top end of the heat pipe 51 is in contact with the pipe 22 to achieve heat transfer between the heat pipe phase change medium 511 and the cold water 11, and the bottom end of the heat pipe 51 is surrounded by the medium-high temperature phase change thermal storage medium 411 to achieve heat exchange between the medium-high temperature phase change thermal storage medium 411 and the heat pipe phase change medium 511.
In this embodiment, the heat pipe phase change medium 511 is water, and the vaporization temperature under vacuum is about 80 ℃. Specifically, when the temperature in the heat pipe 51 is higher than the phase transition temperature of the heat pipe phase transition medium 511 (water), the water is gasified, the heat is brought to the cold water 11 and condensed, and the cold water is deposited at the bottom of the heat pipe 51 by gravity, and is heated in a reciprocating manner, so that uniform and efficient heat transmission is realized. In this way, heat is transferred through the heat pipe 51, and the heat exchange area can be controlled to prevent the cold water 11 from being heated to an excessively high temperature. In a word, the heat pipe heat dissipation subsystem 5 can ensure the uniformity of the internal temperature of the medium-high temperature phase change heat storage medium 411, prevent the heat pipe phase change medium 511 from being gasified due to overheating, ensure efficient and stable heat supply, and prevent the cold water 11 from being heated to a suddenly high and suddenly low temperature, i.e., prevent the sudden rise and drop of the outlet water temperature of the heat transfer water storage subsystem 2.
In this embodiment, the heat pipe 51 is a stainless steel pipe. It should be understood that the heat pipes 51 may also be selected based on the temperature and density of the heat supplied. In addition, a user can adopt heat pipes with different specifications according to the requirement of convenient installation, such as columnar or U-shaped structures. The heat pipe phase change media with different vaporization temperatures correspond to different heat pipe types, and can be selected according to the phase change temperature, the hot water outlet temperature and the water outlet amount of the medium-high temperature phase change heat storage medium 411. For example, the phase-change temperature of the medium-high temperature phase-change heat storage medium 411 is 100 ℃, the service temperature is 200 ℃, the outlet water temperature is 40 ℃, and the water at 80 ℃ is gasified by controlling the vacuum degree to be used as the heat pipe phase-change medium 511.
In this embodiment, a heat insulation device is disposed between the heat transfer and water storage subsystem 2 and the medium-high temperature phase change heat storage subsystem 4, for example, heat transfer is insulated by insulation cotton, so as to prevent the temperature of the heat transfer and water storage subsystem 2 from being too high.
In the following, the system for supplying stable hot water by using the heat pipe in cooperation with the medium-high temperature phase change heat storage medium of the present invention will be further described by specific applications from the aspects of hot water supply for washing and hot water heating by using valley electricity as a heat source, so that the system can be more easily understood and mastered.
The medium-high temperature phase change heat storage subsystem 4 adopts a Hitec salt ternary nitrate/nitrite mixture and comprises NaNO3-KNO3-NaNO2(7% -53% -40%, mass fraction), the melting point (phase transition temperature) is 142 ℃, and the heat storage temperature is not higher than 400 ℃. The amount of the medium-high temperature phase change heat storage medium 411 in the device is adjusted according to the heat supply area and the hot water supply amount. The representative is the sea, the valley power time period is 22: 00-6: 00 at night, the time period can be used as the valley power heating time, a heating source 42 (power supply) of the medium-high temperature phase change heat storage subsystem 4 is started for heating, a valve 35 of the circulating heat supply subsystem 3 is opened, a water pump 34 is started, and the heating is stopped when the temperature or the time reaches a set value. In this example, the temperature is set to 380 ℃, heating is stopped, and heating and hot water supply required in the daytime are completed by using the latent heat and sensible heat of the medium-high temperature phase-change heat storage medium 411. The heat pipe 51 of the heat pipe radiating subsystem 5 is made of stainless steel, the heat pipe phase change medium 511 contained in the heat pipe radiating subsystem selects water as a heat transfer material, and the gasification temperature is 80 ℃ below zero in vacuum. The temperature is higher than the phase change temperature, the water is gasified, the heat is brought to the cold water 11 and condensed, the cold water is deposited at the bottom of the heat pipe by the action of gravity, and the heat is heated in a reciprocating manner, so that the uniform and efficient transmission of the heat is realized. If the heating is needed for 24 hours, opening a valve 12 of the water supply subsystem 1, filling sufficient cold water 11, and adjusting the water flow to be 0.05-3 m according to the temperature3Within the range of per hour, the water is discharged before the water is discharged with different amounts of normal temperature waterMixing the incoming water, and controlling the temperature of the outgoing water to be 30-60 ℃. If the pressure in the device is more than 1.8atm, the emptying valve automatically opens to release the pressure. The system automatically adjusts the power of the valve 35 and the water pump 34 according to the indoor temperature demand. When hot water is needed for washing, the hot water tap 32 is opened to take the hot water. When heating and hot water are not needed, the water pump 34, the valve 35 and the valve 12 are closed, the emptying vent valve 23 and the drain valve (hot water faucet) 32 are opened, the hot water 13 in the heat transfer and water storage subsystem 2 is emptied, and the circulating system is protected.
The above embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and various changes may be made in the above embodiments of the present invention. All simple and equivalent changes and modifications made according to the claims and the content of the specification of the present application fall within the scope of the claims of the present patent application. The invention has not been described in detail in order to avoid obscuring the invention.
Claims (10)
1. A system for providing stable hot water by cooperation of a heat pipe and a medium-high temperature phase change heat storage medium, the system comprising:
a water supply subsystem for supplying cold water;
a hydronic heating subsystem for providing a hot water to a user;
a medium-high temperature phase change heat storage subsystem for storing heat by utilizing sensible heat and latent heat of a medium-high temperature phase change heat storage medium;
a heat transfer water storage subsystem in fluid communication between the water supply subsystem and the cyclical heat supply subsystem; and
and the two ends of the heat pipe are respectively arranged in the heat transfer and water storage subsystem and the medium-high temperature phase change heat storage subsystem so as to transfer heat from the medium-high temperature phase change heat storage subsystem to the heat transfer and water storage subsystem through the heat pipe phase change medium, so that cold water entering the heat transfer and water storage subsystem is heated into hot water.
2. The system of claim 1, wherein the heat and water storage subsystem includes a water storage tank and a conduit disposed in the water storage tank, cold water from the water supply subsystem entering the conduit and being heated in the conduit to provide heated water to the circulation heating subsystem.
3. The system of claim 1, wherein the heat and water storage subsystem further comprises a vent valve for venting the heat and water storage subsystem.
4. The system of claim 1, wherein the hydronic heating subsystem includes a drain valve for both draining and supplying hot water.
5. The system of claim 1, wherein the hydronic heating subsystem, when applied in the heating field, further comprises at least one heat exchanger or heat exchange unit for heating.
6. The system of claim 1, wherein the medium-high temperature phase-change thermal storage subsystem comprises a housing and a heating source, the medium-high temperature phase-change thermal storage medium being received in the housing and heated by the heating source.
7. The system of claim 1, wherein the phase change temperature of the medium-high temperature phase change thermal storage medium is greater than 100 ℃.
8. The system of claim 1, wherein the medium-high temperature phase change thermal storage medium comprises a medium-high temperature phase change material.
9. The system of claim 1, wherein the heat pipe phase change medium is a low boiling point medium.
10. The system of claim 1, wherein a thermal insulation device is arranged between the heat transfer water storage subsystem and the medium-high temperature phase change heat storage subsystem.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112902274A (en) * | 2021-05-10 | 2021-06-04 | 国网江西省电力有限公司电力科学研究院 | Heating system with demand side response function |
| RU2761712C2 (en) * | 2021-04-06 | 2021-12-13 | Общество с ограниченной ответственностью "Научно-производственное объединение "Центротех" | Heat transfer device |
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| RU2761712C2 (en) * | 2021-04-06 | 2021-12-13 | Общество с ограниченной ответственностью "Научно-производственное объединение "Центротех" | Heat transfer device |
| CN112902274A (en) * | 2021-05-10 | 2021-06-04 | 国网江西省电力有限公司电力科学研究院 | Heating system with demand side response function |
| CN112902274B (en) * | 2021-05-10 | 2021-10-19 | 国网江西省电力有限公司电力科学研究院 | Heating system with demand side response function |
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