CN109744782B - Solar double-sided heat storage coil warming bed - Google Patents
Solar double-sided heat storage coil warming bed Download PDFInfo
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- CN109744782B CN109744782B CN201910063613.2A CN201910063613A CN109744782B CN 109744782 B CN109744782 B CN 109744782B CN 201910063613 A CN201910063613 A CN 201910063613A CN 109744782 B CN109744782 B CN 109744782B
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Abstract
The invention discloses a solar double-sided heat storage coil pipe warming bed which comprises five main body parts, namely a bed frame, a heating and heat storage part, a bed panel, a headboard and a bed tail table, wherein a layer of heat insulation material is wrapped outside the heating and heat storage part to prevent heat from being conducted to the bottom or the periphery of the bed, and an air inlet is formed in the bottom; air entering from the air inlet is divided into an upper part and a lower part by the phase change heat storage plate, flows into the upper air flow channel and the lower air flow channel, and enters the bed tail pressure equalizing cavity after being subjected to heat convection with the radiating pipe and the metal fins; the bed tail air port can be flexibly switched, the whole room is heated in the daytime, and the periphery of the bed body is heated at night. The invention solves the indoor day and night differential heat demand in winter, and has good energy-saving effect; the heating mode is safe and comfortable, the solar low-temperature hot water heating is utilized, the environment is protected, the cleaning is realized, the harm of electromagnetic radiation and the like is avoided, and the solar low-temperature hot water heating system has great economic and social benefits when being popularized in residents.
Description
Technical Field
The invention relates to the technical field of solar heat utilization and building heating, in particular to a solar double-sided coil heat-storage warming bed, which is a high-efficiency flexible heat dissipation device adaptive to the indoor heat demand differentiated day and night.
Background
Energy shortage and environmental deterioration are two major problems facing human beings. Fossil fuel resources are limited and non-renewable, and a large amount of waste gas is generated in the process of burning to obtain energy, thereby causing serious pollution to the environment. The search for renewable energy sources which replace conventional energy sources and reduce environmental pollution is an important task of the transformation of current energy mechanisms. And the solar energy has the absolute advantages in a plurality of renewable energy sources because of abundant, inexhaustible, clean and pollution-free solar energy resources. Therefore, in the solar energy enrichment area, the solar energy is utilized to improve the indoor thermal environment of the building, and the solar energy enrichment area has important significance for reducing the conventional energy consumption and relieving the energy shortage and the environmental deterioration.
In northern China, the building is cold in winter, the building thermal performance is poor, the heating energy consumption is high, the single-family building has large shape coefficient and higher heat load in winter. Therefore, the energy conservation and thermal environment improvement tasks of the buildings in the rural areas in the north are difficult. As is known, the residences of the residences in different functional rooms in winter have different stay time and different required indoor temperatures in different time periods, and the phenomenon of time-sharing and zone-dividing heat requirements determined by different indoor activity tracks is reflected, namely, the residences are heated for the rooms/time periods needing heating, and the whole space is not required to be heated. For example: local heating measures such as heated brick beds, hot walls, electric mattresses and the like which are widely used in rural areas in the north. However, the earthen bed and the fire wall burn a large amount of firewood straws, and the sanitary condition is poor; although the electric blanket solves the problems of sanitary conditions and the like, the electric blanket has many hidden dangers of high energy consumption, electromagnetic radiation, insulation electric shock and the like.
Under the requirements of energy shortage and the establishment of comfortable, sanitary and safe indoor environment, whether renewable energy can be adopted as a heating source or not is an urgent problem to be solved, so that the indoor thermal environment in winter is ensured, different thermal requirements at night and day are met, and a safe and clean heating environment is provided.
Disclosure of Invention
The invention provides a solar double-sided coil heat storage heating bed by taking clean solar energy as a heating source and aiming at the characteristic of periodic fluctuation of the solar energy, and a heat storage material is used for absorbing the fluctuation of the solar energy to avoid overheating or supercooling so as to meet the differential heat demand at night in the daytime.
In order to realize the task, the invention adopts the following technical scheme:
a solar double-sided heat storage coil warming bed comprises a hollow bed frame and a bed panel arranged above the bed frame, wherein a headboard is arranged at the front end of the bed frame;
the bed frame is internally provided with a heating and heat storage part through a plurality of supports arranged at intervals, the heating and heat storage part comprises a shell which is hollow inside and has no top surface, the shell is lined with a heat insulation plate, a phase-change heat storage plate is arranged in the shell, and a phase-change heat storage material is filled in the phase-change heat storage plate; the upper surface and the lower surface of the phase change heat storage plate are respectively provided with a plurality of rows of radiating fins, the upper parts of the radiating fins are provided with radiating grooves, and the lower parts of the radiating fins are provided with clamping grooves; the upper surface and the lower surface of the phase change heat storage plate are provided with a plurality of radiating pipes which are connected in parallel in a semi-embedded mode, and the radiating pipes penetrate through clamping grooves in radiating fins; the phase change heat storage plate is parallel to the bottom of the shell, a gap is reserved between the front end of the phase change heat storage plate and the shell, and an upper air flow channel and a lower air flow channel are respectively formed between the phase change heat storage plate and the bed panel and between the phase change heat storage plate and the bottom of the shell; the front end of the bottom of the shell is provided with an air inlet, air enters the shell from the air inlet and flows through the upper air flow channel and the lower air flow channel, the radiating pipe exchanges heat with the air, and the flow direction of the air is opposite to the flow direction of a hot working medium in the radiating pipe; a plurality of radiation convection ports are formed on the bed panel;
the rear end of the bed frame is provided with a bed tail table communicated with the rear end of the heating and heat storage part, the bed tail table comprises a frame main body with a hollow interior, the rear end surface of the frame main body is provided with a side air outlet, and a plurality of first guide vanes with adjustable rotation angles are arranged on the side air outlet from top to bottom; the top end of the frame is provided with an upper air outlet, a plurality of second guide vanes with adjustable rotating angles are installed on the upper air outlet along the horizontal direction, and a rotatable arc-shaped air deflector is installed at the top of the frame main body.
Furthermore, the middle parts of the two ends of the top of the frame main body are symmetrically provided with circular fixed gaskets, the two ends of the air deflector are symmetrically provided with fan-shaped plates, each fan-shaped plate is provided with a pair of rotating gaskets at intervals, and each pair of rotating gaskets clamps one fixed gasket in the rotating gaskets and are coaxially connected through a rotating shaft, so that the air deflector can rotate.
Furthermore, elastic sealing edges are arranged on two sides of the air guide plate.
Furthermore, the bottom of the bed frame is provided with an air guide opening corresponding to the air inlet, and the air guide opening is connected with a mute fan through a flexible connection and a pipeline.
Furthermore, many radiation convection mouths of bed panel be parallel to each other, all process in the bed panel from the side of each radiation convection mouth and accomodate the groove, all movably be provided with the sandwich panel in each accomodates the groove, through making the sandwich panel stretch out or withdraw to accomodating in the groove in order to realize closing or opening of radiation convection mouth.
Furthermore, all the sandwich plates in the accommodating grooves of the bed panel are connected into a whole, the side surface of the bed panel is provided with an adjusting groove, and a radiation switch for adjusting the position of the sandwich plate is arranged in the adjusting groove.
Further, at night, the radiation convection port is opened, the first guide vane is rotated to close the side air outlet, the second guide vane is adjusted to point to the direction of the bed head obliquely, and the air deflector is rotated to point to the direction of the bed head;
in daytime, the radiation convection port is closed, the air deflector is rotated to the direction back to the bed head, then the second guide vane is adjusted to be obliquely back to the direction of the bed head, and the first guide vane is adjusted to be obliquely directed to the direction of the ground.
The invention has the following technical characteristics:
1. the invention is divided into two running modes of day and night according to the actual heat demand, and can greatly save the heating energy consumption. According to the thinking of local heating and comprehensive heating, the device can heat the whole room in daytime and only heat the periphery of the bed body at night, so that the human body is ensured to be in a comfortable sleeping environment. The two operation modes avoid heating the whole room at night and increase heating energy consumption.
2. The invention can flexibly select the mute fan to be turned on or turned off during heating. When heating, the fan is closed, air can pass through the flow channel under the action of hot pressure to heat the bed body or the room, and noise can be completely eliminated. The fan is started during heating, so that the convection heat exchange heating effect can be enhanced better. The two modes can be flexibly adjusted according to requirements.
3. The semi-buried combination of the coil pipe and the heat storage module in the bed body increases the contact area and has better heat transfer effect. The direction of flow of the heating working medium in the coil pipe is opposite to that of the air, and the heat exchange efficiency of the countercurrent heat exchange is higher than that of the concurrent heat exchange. Compared with the common single-layer coil pipe, the heat supply is generally needed for a single side, the lower layer is provided with heat preservation and only takes the upper layer for heat dissipation, and the heat dissipation efficiency of the coil pipe is greatly reduced. The invention can give full play to the heat dissipation of the coil pipe. These measures improve the heat exchange efficiency of the bed body on the whole.
4. The invention creates comfortable environment and is simple and convenient to operate. The air flow at the air inlet of the bed body is blocked by the headboard in the head area, and the air outlet is arranged at the tail part of the bed, so that the blowing sense of the head can be avoided while the comfortable temperature can be ensured. The user can adjust day and night working condition conversion by oneself, and the switch wind gap is easy and simple to handle.
5. The phase change heat storage material is reasonably arranged in the bed body structure, so that the problems of periodicity and instability of solar energy are solved. The phase-change heat storage material has large heat storage capacity and stable heat storage and release capacity, stores redundant heat when solar radiation is strong, avoids causing energy waste caused by indoor overheating, and can provide heat for the liquid heat transfer working medium at night so as to ensure the indoor temperature.
Drawings
FIG. 1 is an exploded isometric view of the device of the present invention;
fig. 2 (a) is a perspective view showing the internal structure of the heating and heat accumulating part, (b) is a view showing the layout form of the radiating pipe, and (c) is a partial view showing the coupling portion of the radiating pipe and the fin;
FIG. 3 is a plan view showing the arrangement positions of the radiating pipes and the radiating fins;
FIG. 4 is a sectional view (sectional view A-A in FIG. 3) of a radiating pipe and a radiating rib layout portion;
fig. 5 (a) is a schematic structural view of the bed panel, (b) is a schematic structural view of the radiation switch on the bed panel, and (c) is a schematic structural view of the radiation switch on the bed panel;
FIG. 6 is a schematic view of the flow of hot air to the night bed foot;
FIG. 7 is a schematic view of the hot air flow direction of the diurnal bed tailstock;
FIG. 8 is a schematic cross-sectional view of the bed being heated by warm air at night;
FIG. 9 is a schematic cross-sectional view of a daytime warm air heating room;
fig. 10 (a) is a position view of two outlets on the bed tail table, (b) is an exploded view of the connection structure of the air deflector, and (c) is a partial view of the connection of the air deflector.
The reference numbers in the figures illustrate: 1 bed frame, 2 supports, 3 headboards, 4 heating and heat storage parts, 5 bed panels, 6 bed end tables, 7 shells, 8 heat preservation boards, 9 phase change heat storage boards, 10 phase change heat storage materials, 11 radiating pipes, 12 radiating fins, 13 upper air flow channels, 14 lower air flow channels, 15 air inlets, 16 accommodating grooves, 17 sandwich boards, 18 radiation convection ports, 19 radiation switches, 20 frame bodies, 21 pressure equalizing cavities, 22 side air outlets, 23 first guide vanes, 24 upper air outlets, 25 second guide vanes, 26 air deflectors, 27 elastic sealing edges, 28 rotating shafts, 29 rotating gaskets, 30 fixing gaskets, 31 flexible connections, 32 pipelines and 33 silent fans.
Detailed Description
The design idea of the invention is that the heat of the radiating pipe 11 in the heating and heat storage part 4 on the bed frame 1 comes from a solar heat collecting system, and in daytime, the radiating pipe 11 exchanges heat with air to heat a heating chamber and stores the waste heat in the phase change heat storage material 10 in the phase change heat storage plate 9; at night, the solar energy resource is not enough to provide the heat required by heating, and the radiating pipe 11 will take heat from the phase change heat storage material 10 to heat the periphery of the bed body. A mute fan 33 is arranged below the bed body, the mute fan 33 is connected with the heating and heat storage part 4, and the air flow becomes warm air after passing through the heating and heat storage part 4 to supply heat to the room. The air volume of the fan 33 can be adjusted to be large in daytime, the radiation convection port 18 on the bed panel 5 is closed, and the upper air outlet 24 and the side air outlet 22 of the bed tail table 6 are adjusted to blow hot air indoors; the air quantity of the fan 33 is reduced at night, the side air outlet 22 is closed, the radiation convection port 18 on the bed panel 5 is opened, the upper air outlet 24 at the bed tail is adjusted, hot air is enabled to heat the periphery of the bed body, or the fan 33 is closed to create a completely silent sleep condition, and the radiation convection of the radiating pipe 11 can also meet the temperature of the bedding.
Referring to fig. 1, the solar double-sided heat storage coil warming bed comprises a hollow bed frame 1 and a bed panel 5 arranged above the bed frame 1, wherein the bottom and the periphery of the bed frame 1 are covered with heat preservation shells, and a headboard 3 is arranged at the front end of the bed frame 1. The bottom and the side of the bed frame 1 are both plate-type structures, which form the main body structure of the bed frame 1. The bottom of the bed frame 1 is provided with a support leg, the interior of the bed frame is hollow and has no top surface.
The bed frame 1 in install heating and heat accumulation portion 4 through the support 2 that a plurality of intervals set up, wherein the bottom in the bed frame 1 is laid to support 2, support 2 is hollow out construction for support heating and heat accumulation portion 4. As shown in fig. 2 to 4, the heating and heat-accumulating part 4 is a rectangular structure without a top surface, and includes a hollow outer shell 7, and the outer shell 7 is lined with a heat-insulating plate 8 to reduce heat conduction to the bottom or periphery of the bed.
A phase-change heat storage plate is arranged in the shell 7, and a phase-change heat storage material 10 is filled in the phase-change heat storage plate 9; the upper and lower surfaces of the phase change heat storage plate 9 are provided with a plurality of rows of metal radiating fins 12, the upper parts of the radiating fins 12 are provided with radiating grooves to increase the radiating area, and the lower parts of the radiating fins 12 are provided with clamping grooves to be fixed with the radiating pipe 11 and transfer heat; the upper surface and the lower surface of the phase change heat storage plate 9 are provided with a plurality of metal radiating pipes 11 which are connected in parallel in a semi-buried mode, and the radiating pipes 11 penetrate through clamping grooves in radiating fins 12. The top of the shell 7 is close to or in contact with the bed panel 5, and a plurality of radiation convection ports 18 are arranged on the bed panel 5, so that heat can reach the upper part of the bed panel 5 through the radiation convection ports 18.
The phase change heat storage plate 9 is parallel to the bottom of the shell 7, and a gap is reserved between the front end of the phase change heat storage plate and the shell 7 and used for enabling air to enter an upper air flow channel 13; an upper air flow channel 13 and a lower air flow channel 14 are respectively formed between the phase change heat storage plate 9 and the bed panel 5 and between the bottoms of the shells 7; the front end of the bottom of the shell 7 is provided with an air inlet 15, air enters the shell 7 from the air inlet 15 and flows through the upper air flow channel 13 and the lower air flow channel 14, the radiating pipe 11 exchanges heat with the air, the flow direction of the air is opposite to that of the hot working medium in the radiating pipe 11, and the heat exchange efficiency is improved through countercurrent heat exchange. After the heat working medium in the metal radiating pipe 11 exchanges heat with cold air or transfers heat into the phase change heat storage plate 9, the heat is heated in the solar heat collecting system and returns to the radiating pipe 11 again to exchange heat with air, so that circulation is formed. As shown in fig. 1, in order to facilitate the butt joint with the bed end 6, a reserved opening is formed on the rear end face of the shell 7; in addition, a through groove is arranged on the rear end surface of the bed frame 1. The rear end of the heating and heat-accumulating part 4 passes through the through groove and is butted with the bed tail table 6.
As shown in fig. 5, a plurality of radiation convection ports 18 of the bed panel 5 are parallel to each other, a receiving groove 16 is formed from a side surface of each radiation convection port 18 into the bed panel 5, a sandwich plate 17 is movably disposed in each receiving groove 16, and the radiation convection ports 18 are closed or opened by extending or retracting the sandwich plate 17 into the receiving groove 16; the bed panel 5 is characterized in that the sandwich plates 17 in all the accommodating grooves 16 are connected into a whole, an adjusting groove is formed in the side surface of the bed panel 5, and a radiation switch 19 for adjusting the position of the sandwich plate 17 is arranged in the adjusting groove. Specifically, the same ends of all the sandwich plates 17 are connected through a connecting plate, the connecting plate is connected with the radiation switch 19, and when the radiation switch 19 is pulled, all the sandwich plates 17 are driven to synchronously move through the connecting plate, so that the sandwich plates 17 extend out of the adjusting groove to plug the radiation convection port 18; or retracting the sandwich panel 17 into the adjustment slot to open the radiation convection port 18; the opening degree of the radiation convection port 18 can also be adjusted by adjusting the position of the radiation switch 19, so as to meet different practical use requirements, as shown in fig. 5 (b) and (c).
As shown in fig. 5, the bottom edge of the bed panel 5 and the top edge of the bed frame 1 are symmetrically provided with mounting slots, so that the bed panel 5 can cover the bed frame 1 without horizontal displacement and has good sealing performance, as shown in fig. 1.
The rear end of the bed frame 1 is provided with a bed tail platform 6 communicated with the rear end of the heating and heat storage part 4, the bed tail platform 6 comprises a frame main body 20 with a hollow inner part, the front end surface of the frame main body 20 is provided with a butt joint port for butt joint with a reserved port of the heating and heat storage part 4, the rear end surface of the frame main body 20 is provided with a side air outlet 22, and a plurality of first guide vanes 23 with adjustable rotation angles are arranged on the side air outlet 22 from top to bottom; an upper air outlet 24 is arranged at the top end of the frame, a plurality of second guide vanes 25 with adjustable rotation angles are installed on the upper air outlet 24 along the horizontal direction, and a rotatable arc-shaped air deflector 26 is installed at the top of the frame main body 20. The first guide vane 23 and the second guide vane 25 are all in a louvered structure.
Optionally, circular fixing spacers 30 are symmetrically disposed in the middle of two ends of the top of the frame body 20, fan-shaped plates are symmetrically disposed at two ends of the air guiding plate 26, a pair of rotating spacers 29 is disposed on each fan-shaped plate at intervals, and each pair of rotating spacers 29 clamps one fixing spacer 30 therebetween and is coaxially connected through the rotating shaft 28, so that the air guiding plate 26 can rotate. As shown in fig. 10, the length of the air deflector 26 is the same as the length of the bed end 6, and the radius of the fan-shaped plate is half of the width of the bed end 6.
As can be seen from fig. 6 and 7, the hot air from the heating and heat-accumulating part 4 enters the pressure equalizing chamber 21 enclosed by the bed frame 1, and then heats the bed or the room through the side air outlet 22 or the upper air outlet 24. As shown in fig. 10 (a) and (B), the bed tail 6 has a butt joint on the a surface (front end surface) and the side outlet 22 on the B surface (rear end surface).
At night, the angles of the first guide vanes 23 on the side air outlet 22 and the second guide vanes 25 on the upper air outlet 24 are adjusted, so that the side air outlet 22 is closed, the upper air outlet 24 is inclined to the bed surface to supply air, and the periphery of the bed body is heated; in daytime, the air outlet 22 on the control side obliquely discharges air downwards, and the air outlet 24 on the upper side discharges air in the direction away from the bed body, so that indoor heating is realized. As shown in fig. 10 (c), the circular arc-shaped air deflector 26 can rotate at 90 °, and elastic sealing edges 27 are disposed on both sides of the air deflector 26; the elastic sealing plate can be made of rubber. When one side of the air deflector 26 contacts with the frame body 20 of the bed tail 6, the elastic sealing edge 27 is tightly attached to the frame body 20 for sealing, and the other side of the elastic sealing edge 27 and the arc-shaped air deflector 26 work together to make the hot air outlet laterally.
As shown in fig. 8, the bottom of the bed frame 1 is provided with an air guide opening corresponding to the air inlet 15, and the air guide opening is connected with a mute fan 33 through a flexible connection 31 and a pipeline 32. Be provided with headboard 3 in this scheme, can block the air current that arouses because the air inlet of bed bottom, avoid user's head to appear blowing and feel.
The invention has two operation conditions: as shown in fig. 8, during night operation, the radiation convection port 18 is opened, the first guide vane 23 is rotated to close the side air outlet 22, the second guide vane 25 is adjusted to point in the direction of the bed head, and the air deflector 26 is rotated to point in the direction of the bed head; when the mute fan 33 is turned on, the air flow enters from the air inlet 15, passes through the upper air flow channel 13 and the lower air flow channel 14, then a part of the air flows through the radiation convection port 18 on the bed surface to carry out convection heat exchange with the bedding, and the other part of the air flows into the pressure equalizing cavity 21 of the bed tail table 6 and blows to the upper part of the bedding of the user from the upper air outlet 24.
In daytime, as shown in fig. 9, during daytime, the radiation convection port 18 is closed, the air deflector 26 is rotated to face away from the bed head, then the second guide vane 25 is adjusted to face obliquely away from the bed head, and the first guide vane 23 is adjusted to face obliquely toward the ground. Air entering from the air inlet 15 passes through the upper air flow channel 13 and the lower air flow channel 14 and then is converged into the pressure equalizing chamber 21, and then is blown to the indoor space through the upper air outlet 24 and the side air outlet 22 of the bed tail 6.
The invention is further illustrated by the following examples.
Taking the example of the Xian, the outdoor heating temperature is-3.4 ℃, and the indoor heating temperature is 18 ℃. The room has a length, width and height dimension of 3.2m × 3.2m × 2.7m, a door dimension of 0.8m × 2.0m, and a window dimension of 1.5m × 1.5 m. In the daytime, the solar double-sided coil heat storage warm bed provides heat for the indoor to meet the indoor heat load requirement, and the room heat load mainly comprises the heat consumption of the enclosure structure and the heat consumption of cold air permeation. According to the energy-saving design standard JGJ26-2010 of residential buildings in severe cold and cold regions, for the thermal insulation wall meeting the energy-saving standard, the heat consumption of the enclosure structure is 509.5W after calculation, and the heat consumption of cold air permeation is 25.6W, namely the heat load Q of a roomLAbout 535.1W.
(1) When the air outlet of the bed body in daytime meets the following equation, the solar double-sided coil heat storage warming bed can meet the heating requirement in daytime:
QL＝3600-1×cp×ρout×Lout×(tout-tair)
in the formula QLRoom heat load, W, 535.1W;
cpthe specific heat capacity at constant pressure of air, J/(kg. DEG C.), has a value of 1005J/(kg. DEG C.)；
ρoutDensity of air, kg/m3，1.205kg/m3；
LoutThe air quantity m passing through the air outlets (upper air outlet and side air outlet) of the bed body3/h；
toutThe air temperature at the air outlet of the bed body is at the temperature of DEG C;
tair-room air temperature, deg.C, 18 deg.C.
When the heat provided by the air exhausted from the bed warming in the daytime to the indoor is equal to the heat load, the bed warming in the daytime can meet the heating requirement. The specific heat capacity and the density of the air are not changed greatly and are both normal temperature values, 1005J/(kg DEG C) and 1.205kg/m3. The room air temperature was 18 ℃. The sizes of the upper air outlet and the side air outlet at the bed tail are louver openings of 1000mm multiplied by 200mm and 1000mm multiplied by 540mm, the area coefficient of the air openings is 0.80, and the effective areas of the upper air outlet and the side air outlet are 0.74 multiplied by 0.80 to 0.592m2. The values are taken to yield:
TABLE 1 flow and wind speed of different outlet air temperatures
| tout(℃) | 20 | 24 | 28 | 32 | 36 | 40 |
| Lout(m3/h) | 795.34 | 265.11 | 159.07 | 113.62 | 88.37 | 72.30 |
| vout(m/s) | 0.37 | 0.12 | 0.07 | 0.05 | 0.04 | 0.03 |
(2) The heat absorption capacity of the phase-change heat storage material in the daytime under solar irradiation is as follows:
QPCM＝ρPCM×VPCM×ΔH
in the formula QPCM-the heat absorption of the phase change heat storage material, J;
ρPCMdensity of the phase change material, kg/m3，1510kg/m3；
VPCMVolume of phase change material, m3；
Delta H-latent heat of phase change material, J/kg, 1.8X 105J/kg。
The phase change heat storage material is prepared from paraffin and high-density polyethylene, the phase change temperature is 26 ℃, and the density and the phase change latent heat are 1510kg/m respectively3And 1.8X 105J/kg, the base area of the phase change heat storage material is about 0.9 multiplied by 0.19 to 1.71m2Thickness of 60mm and volume of about VPCM＝0.103m3The ideal heat storage capacity of the phase change material is QPCM＝1510×0.103×1.8×105＝2.80×107J。
Suppose an entire dayThe solar radiation can provide 8h (9: 00-17: 00) of heat for the coil pipe, namely the heat storage capacity of the phase change material meets the 8h day and 8h night working condition. Only needs to heat around the bed body at night, so the heat needed at night is equivalent to the heat dissipation of the enclosure structure with the indoor temperature of 10 ℃, and Q is calculatedLN345.8W. The heat required by the room in the 8h day and 8h night working conditions is (Q)L+QLN)×8×3600＝2.54×107J<QPCMTherefore, the heat storage capacity can meet the heat load requirement.
(3) Heat supply per unit time of the coil pipe during solar irradiation in daytime:
Qg＝cg×ρg×ug×Ag×(t2-t1)
in the formula Qg-coil heat dissipation per unit time, W;
cgthe specific heat capacity at constant pressure of the liquid working medium, J/(kg. DEG C.), 4.2X 103J/(kg·℃)；
ρgDensity of the liquid working substance, kg/m3，1000kg/m3；
ug-the flow velocity of the liquid working medium, m/s;
Agcross-sectional area of the coil, m2The total cross-sectional area of the double-layer coil is about 7.13 multiplied by 10-4m2；
t2-the outlet temperature of the liquid working medium, deg.c;
t1inlet temperature of the liquid working medium, deg.C.
For example, the heating working medium is water, the coil pipe adopts DN20 with the inner diameter of the pipe being 21.3mm, and the cross section area of the double-layer coil pipe is 2 pi x (0.0213/2)2＝7.13×10-4m2. The heat quantity provided by the solar radiation to the coil pipe 8h (9: 00-17: 00) is equal to the sum of the heat quantity required by the daytime and the heat storage quantity of the phase change material in the period, namely Qg×8×3600＝QL×8×3600+QPCM(ii) a Substitution data QgAnd setting the supply and return temperature of the heating working medium as 1507W to obtain the flow speed.
TABLE 2 flow rates corresponding to different supply and return water temperatures
| Qg(W) | 1507 | 1507 | 1507 | 1507 | 1507 | 1507 |
| cg J/(kg·℃) | 4200 | 4200 | 4200 | 4200 | 4200 | 4200 |
| ρg(kg/m3) | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 |
| t1(℃) | 20 | 20 | 20 | 20 | 20 | 20 |
| Ag(m2) | 0.000713 | 0.000713 | 0.000713 | 0.000713 | 0.000713 | 0.000713 |
| t2(℃) | 30 | 32 | 34 | 36 | 40 | 45 |
| ug(m/s) | 0.05 | 0.04 | 0.04 | 0.03 | 0.03 | 0.02 |
The analysis of the above examples shows that the solar double-sided hot water coil heat storage heating bed can be flexibly adjusted under different heat demand conditions in day and night, energy waste is reduced, the heating demand in winter can be met by using low-temperature hot water, and the advantages of solar energy and phase change heat storage materials can be greatly exerted.
Claims (6)
1. A solar double-sided heat storage coil warming bed comprises a hollow bed frame (1) and a bed panel (5) arranged above the bed frame (1), wherein a headboard (3) is arranged at the front end of the bed frame (1), a heating and heat storage part (4) is arranged in the bed frame (1) through a plurality of supports (2) arranged at intervals, the heating and heat storage part (4) comprises a shell (7) which is hollow inside and has no top surface, a heat insulation board (8) is lined in the shell (7), a phase-change heat storage board (9) is arranged in the shell (7), and a phase-change heat storage material (10) is filled in the phase-change heat storage board (9); the method is characterized in that:
a plurality of rows of radiating fins (12) are arranged on the upper surface and the lower surface of the phase-change heat storage plate (9), radiating grooves are formed in the upper parts of the radiating fins (12), and clamping grooves are formed in the lower parts of the radiating fins; the upper surface and the lower surface of the phase change heat storage plate (9) are both provided with a plurality of radiating pipes (11) connected in parallel in a semi-embedded mode, and the radiating pipes (11) penetrate through clamping grooves in radiating fins (12); the phase change heat storage plate (9) is parallel to the bottom of the shell (7), a gap is reserved between the front end of the phase change heat storage plate and the shell (7), and an upper air flow channel (13) and a lower air flow channel (14) are respectively formed between the phase change heat storage plate (9) and the bed panel (5) and between the bottom of the shell (7); the front end of the bottom of the shell (7) is provided with an air inlet (15), air enters the shell (7) from the air inlet (15) and flows through the upper air flow channel (13) and the lower air flow channel (14), the radiating pipe (11) exchanges heat with the air, and the flow direction of the air is opposite to that of the hot working medium in the radiating pipe (11); a plurality of radiation convection ports (18) are arranged on the bed panel (5);
the rear end of the bed frame (1) is provided with a bed tail platform (6) communicated with the rear end of the heating and heat storage part (4), the bed tail platform (6) comprises a frame main body (20) with a hollow inner part, the rear end surface of the frame main body (20) is provided with a side air outlet (22), and a plurality of first guide vanes (23) with adjustable rotation angles are arranged on the side air outlet (22) from top to bottom; an upper air outlet (24) is formed in the top end of the frame, a plurality of second guide vanes (25) with adjustable rotating angles are installed on the upper air outlet (24) in the horizontal direction, and a rotatable arc-shaped air deflector (26) is installed on the top of the frame main body (20);
at night, the radiation convection port (18) is opened, the first guide vane (23) is rotated to close the side air outlet (22), the second guide vane (25) is adjusted to point to the direction of the bed head in an inclined mode, and the air deflector (26) is rotated to face the direction of the bed head;
in daytime, the radiation convection port (18) is closed, the air deflector (26) is rotated to be back to the direction of the bed head, then the second guide vane (25) is adjusted to be obliquely back to the direction of the bed head, and the first guide vane (23) is adjusted to be obliquely directed to the direction of the ground.
2. The solar double-sided heat storage coil bed heater according to claim 1, wherein circular fixing gaskets (30) are symmetrically arranged in the middle of two ends of the top of the frame body (20), fan-shaped plates are symmetrically arranged at two ends of the air deflector (26), a pair of rotating gaskets (29) are arranged on each fan-shaped plate at intervals, and each pair of rotating gaskets (29) clamps the fixing gaskets (30) therein and are coaxially connected through a rotating shaft (28) so that the air deflector (26) can rotate.
3. The solar double-sided thermal storage coil bed warmer according to claim 1, wherein the air deflector (26) is provided with elastic sealing edges (27) on both sides.
4. The solar double-sided heat storage coil warming bed according to claim 1, wherein the bottom of the bed frame (1) is provided with an air guide opening corresponding to the air inlet (15), and the air guide opening is connected with a mute fan (33) through a flexible connection (31) and a pipeline (32).
5. The solar double-sided heat storage coil heating bed as claimed in claim 1, wherein the plurality of radiation convection ports (18) of the bed panel (5) are parallel to each other, a receiving groove (16) is formed from the side surface of each radiation convection port (18) into the bed panel (5), a sandwich plate (17) is movably arranged in each receiving groove (16), and the radiation convection ports (18) are closed or opened by extending or retracting the sandwich plate (17) into the receiving groove (16).
6. The solar double-sided heat storage coil warming bed according to claim 1, wherein the sandwich plates (17) in all the accommodating grooves (16) of the bed panel (5) are connected into a whole, an adjusting groove is formed in the side surface of the bed panel (5), and a radiation switch (19) for adjusting the position of the sandwich plate (17) is arranged in the adjusting groove.
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| CN201910063613.2A CN109744782B (en) | 2019-01-23 | 2019-01-23 | Solar double-sided heat storage coil warming bed |
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| CN201910063613.2A CN109744782B (en) | 2019-01-23 | 2019-01-23 | Solar double-sided heat storage coil warming bed |
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| CN109744782A CN109744782A (en) | 2019-05-14 |
| CN109744782B true CN109744782B (en) | 2021-06-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20210124682A (en) * | 2020-04-07 | 2021-10-15 | 엘지전자 주식회사 | Control method of bed |
| CN111412528A (en) * | 2020-04-09 | 2020-07-14 | 兰州华能生态能源科技股份有限公司 | Solar indoor heatable brick bed system |
| CN112145314B (en) * | 2020-09-23 | 2022-08-16 | 湖南金航船舶制造有限公司 | Waste heat utilization device of LNG internal combustion power boats and ships |
| CN113063176B (en) * | 2021-04-21 | 2022-07-29 | 上海理工大学 | Adjustable heat storage-heat dissipation composite device |
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