CN212585111U - End device of chilled water large temperature difference air conditioning system - Google Patents
End device of chilled water large temperature difference air conditioning system Download PDFInfo
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- CN212585111U CN212585111U CN202020821296.4U CN202020821296U CN212585111U CN 212585111 U CN212585111 U CN 212585111U CN 202020821296 U CN202020821296 U CN 202020821296U CN 212585111 U CN212585111 U CN 212585111U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 137
- 238000004378 air conditioning Methods 0.000 title claims abstract description 35
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- 239000007788 liquid Substances 0.000 claims abstract description 14
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- 229910001335 Galvanized steel Inorganic materials 0.000 description 3
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- 239000005871 repellent Substances 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
Abstract
The utility model discloses a terminal device of a chilled water large temperature difference air conditioning system, which comprises a latent heat terminal and a high temperature sensible heat terminal; the system is matched with a water chilling unit of a chilled water large temperature difference air conditioning system for use; the latent heat end comprises an air handling unit and a low-temperature water supply pipe; one end of the low-temperature water supply pipe is connected with a water outlet of the water chilling unit, and the other end of the low-temperature water supply pipe is connected with a chilled water inlet of the air handling unit; the high temperature sensible heat end comprises a radiant panel assembly, and the radiant panel assembly comprises at least one radiant panel; the radiation plate consists of heat exchange tubes and fins; the chilled water outlet of the air treatment unit is connected with the liquid inlet of the heat exchange tube through a pipeline, and the liquid outlet of the heat exchange tube is connected with the water inlet of the water chilling unit through a high-temperature return tube. The tail end device of the chilled water large-temperature-difference air conditioning system bears all latent heat load and partial sensible heat load through the latent heat tail end and bears residual sensible heat load through the high-temperature sensible heat tail end.
Description
Technical Field
The utility model belongs to heating and ventilating air conditioner application, concretely relates to big difference in temperature air conditioning system end device of refrigerated water.
Background
The independent temperature and humidity control system adopts a heat and humidity independent treatment mode to create conditions for a high-temperature cold source to treat sensible heat, so that the refrigeration energy efficiency of the air conditioner is remarkably improved.
Chinese patent application No. CN201720356464.5 discloses a dual-temperature heat source heat pump system; the heat pump evaporator and the condenser both adopt two groups of heat exchangers, the two groups of heat exchangers can be used as evaporators/condensers to operate in different modes of refrigeration and heating and operate at different temperatures, so that the heat transfer temperature difference between a heat pump working medium and an environment medium is reduced during operation, the pressure difference between high-temperature and low-temperature heat sources of the heat pump is reduced to a certain extent, independent temperature and humidity control, independent heat and humidity load treatment, full heat recovery of exhaust air and the like can be realized, and the refrigeration, heat supply, ventilation and object heating, cooling, drying and dehumidification efficiency of a heat pump air conditioner is improved. While the dual cold source version improves chiller energy efficiency, it increases chilled water delivery energy consumption and system complexity.
The large temperature difference air conditioning system for chilled water is a system device for improving the conveying efficiency of cold (heat) quantity by improving the temperature difference of cold (heat) carrying agent in the cold (heat) quantity conveying process. The cold water system of the air conditioner generally comprises a water chilling unit, a cooling tower, a chilled water pump, a cooling water pump and other main energy consumption components. The large-temperature-difference water cooling system can save the circulating water quantity of the system, correspondingly reduce the lift and the operating cost of the water pump, reduce the size of a pipeline and save the initial investment of the system.
Chinese patent application No. CN201811249171.2 discloses a chilled water large temperature difference energy-saving air conditioning system. In each air conditioner design area, all the fresh air handling units are connected in parallel to form a fresh air handling unit module, all the return air handling units are connected in parallel to form a return air handling unit module, and the fresh air handling unit module and the return air handling unit module are connected in series to form an air conditioner terminal module. The cold energy of the low-temperature section and the high-temperature section of the chilled water is scientifically utilized, so that the cold is realizedThe large temperature difference operation of the frozen water reduces the energy consumption and initial investment of the frozen water system. But the temperature t of the chilled water supplysAnd return water temperature trThe temperature difference is 8-10 ℃, and the temperature of the outlet water of the chilled water is about 16 ℃. The chilled water can still enter the high-temperature sensible heat tail end for further cooling. Therefore, the system energy efficiency can be improved if the high-temperature section cold water can enter the sensible heat tail end for further cooling.
SUMMERY OF THE UTILITY MODEL
The to-be-solved problem of the utility model is an improve the big difference in temperature air conditioning system end equipment of refrigerated water who supplies the return water difference in temperature.
In order to solve the technical problem, the utility model provides a terminal device of a chilled water large temperature difference air conditioning system, which is matched with a water chilling unit of the chilled water large temperature difference air conditioning system; the end device comprises a latent heat end and a high temperature sensible heat end;
the latent heat end comprises an air handling unit and a low-temperature water supply pipe; one end of the low-temperature water supply pipe is connected with a water outlet of the water chilling unit, and the other end of the low-temperature water supply pipe is connected with a chilled water inlet of the air handling unit;
the high temperature sensible tip comprises a radiant panel assembly comprising at least one radiant panel; the radiation plate consists of a heat exchange tube and fins arranged on the surface of the heat exchange tube; the chilled water outlet of the air treatment unit is connected with the liquid inlet of the heat exchange tube through a pipeline, and the liquid outlet of the heat exchange tube is connected with the water inlet of the water chilling unit through a high-temperature return tube.
As the utility model discloses a big difference in temperature air conditioning system end equipment's of refrigerated water improvement: the whole upper surface at the radiant panel sets up the insulating layer, sets up the hydrophobic layer at the whole lower surface of radiant panel.
As the utility model discloses a big difference in temperature air conditioning system end equipment's of refrigerated water further improvement: and a condensate tank is arranged at the long edge of one side of the hydrophobic layer.
As the utility model discloses a big difference in temperature air conditioning system end equipment's of refrigerated water further improvement: and opening a hole on the hydrophobic layer.
As the utility model discloses a big difference in temperature air conditioning system end equipment's of refrigerated water further improvement: two sides of the air handling unit are symmetrically provided with a radiation plate inclined at 45 degrees respectively.
As the utility model discloses a big difference in temperature air conditioning system end equipment's of refrigerated water further improvement: the radiation plate component comprises at least four radiation plates which are inclined at 45 degrees and are connected end to end,
and the two sides of the air handling unit are symmetrically provided with a radiation plate assembly respectively.
The air handling unit can be, for example, a conventional fan coil unit, a ceiling-mounted air handling unit or the like, wherein the fan coil unit can also be a cross-flow fan which blows air over the radiation plates to enhance heat exchange.
The utility model discloses during actual operation, it is terminal to get into the latent heat from the 5 ~ 7 ℃ low temperature refrigerated water of cooling water set export exhaust, undertakes indoor latent heat load and partial sensible heat load. The cold water after temperature rise enters the high-temperature sensible heat tail end for further cooling, and the residual sensible heat load in the room is borne. In the latent heat end, the air supply of the air handling unit sweeps across the surface of the radiation plate, so that the air disturbance near the surface of the radiation plate is enhanced, and the enhanced heat transfer is facilitated, therefore, the radiation plate and the air handling unit can form a better airflow organization form, and the indoor heat exchange is enhanced. The outlet water temperature of the air treatment unit is about 16 ℃, which is about 1 ℃ higher than the dew point temperature under the ordinary indoor design working condition, and the radiant panel basically has no condensation risk. But considering that the temperature of cold water entering the radiation plate may be lower than the dew point temperature in the room, the radiation plate has a dewing risk; in order to prevent the dew formation, the air treatment unit can be redesigned, so that the temperature difference between the supply water and the return water of the coil pipe is increased, and the temperature of the cold water entering the radiation plate is higher than the indoor dew point temperature; the radiation plate can also be obliquely arranged, the lower surface of the radiation plate is coated with a hydrophobic material (namely, the hydrophobic layer is arranged on the lower surface of the radiation plate), and the generated condensation enters the condensation tank under the action of gravity. When the radiation plates are inclined at 45 degrees and are connected end to end, the adjacent 2 radiation plates can adopt an integrated arrangement mode that the tops of the fins are folded into an L shape, so that the surfaces of the radiation plates are attractive, and heat transfer is facilitated. High-temperature return water (about 20-22 ℃) flowing out of the radiation plate enters a water chilling unit to realize circulation of the system. The large-temperature-difference end device greatly improves the temperature difference between the supply water and the return water, the temperature difference can reach 13-17 ℃, the flow of chilled water is obviously reduced, and the energy consumption for conveying is reduced.
The utility model has the following technical advantages:
1. cold water entering the air handling unit through the low temperature section bears the whole latent heat load and part of the sensible heat load. High-temperature cold water flowing out of the air treatment unit is connected in series and enters the sensible heat tail end to bear residual sensible heat load, and the efficiency of the water chilling unit working at a high-temperature section is greatly improved. Because the indoor load is certain, the temperature difference between the cold water supply and return water is increased and can reach 13-17 ℃, so that the flow of the cold water is reduced, the temperature difference between the supply and return water is increased, the circulating water quantity of the system is saved, and the lift and the operating cost of the water pump are correspondingly reduced. The water route is the design of journey, is favorable to hydraulic balance.
2. The radiant panels may be single or double row finned tubes. When the radiation plates are inclined at 45 degrees and are connected end to end, the adjacent 2 radiation plates can adopt an integrated arrangement mode that the tops of the fins are folded into L shapes, so that the surfaces of the radiation plates are attractive, heat transfer in a heat supply mode is facilitated, and the indoor heat exchange effect is enhanced. The heat exchange effect of the radiation plate can be enhanced by the combined mode of convection and radiation, and the comfort of the indoor environment can be effectively improved.
3. The radiation plate is obliquely arranged, and the whole lower surface of the radiation plate is provided with the hydrophobic layer, so that condensation can enter the condensation tank; and the hydrophobic layer is provided with a proper hole, so that radiation heat transfer is facilitated. The heat insulation layer made of heat insulation materials is arranged on the upper surface of the radiation plate, so that radiation energy loss can be reduced.
To sum up, combine the big difference in temperature air conditioning system of current refrigerated water, the utility model provides a big difference in temperature air conditioning system end equipment of refrigerated water undertakes whole latent heat load and partial sensible heat load through the latent heat end, undertakes surplus sensible heat load through high temperature sensible heat end, realizes heat, wet independent processing. And the problem of condensation at the tail end of sensible heat is better solved.
Drawings
The following describes the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a terminal device of a chilled water large temperature difference air conditioning system according to the present invention (example 1);
FIG. 2 is a schematic view of another chilled water large temperature difference air conditioning system end unit of the present invention (example 4);
FIG. 3 is a schematic view of the end device of a chilled water large temperature difference air conditioning system according to the present invention (example 2);
FIG. 4 is an enlarged fragmentary view from above of FIG. 3 after rotation;
FIG. 5 is a schematic view of the end device of a chilled water large temperature difference air conditioning system according to the present invention (example 3);
FIG. 6 is an enlarged fragmentary view from above of FIG. 5 after rotation;
fig. 7 is an enlarged exploded view of the radiation plate 3 of fig. 3;
fig. 8 is a schematic view of a structure of the radiation plate 3;
fig. 9 is another structural schematic view of the radiation plate 3;
fig. 10 is a schematic view of still another structure of the radiation plate 3.
In the figure: 1. an air handling unit; 2. a heat exchange pipe; 3. a radiation plate; 4. a galvanized steel sheet; 5. a condensate tank; 6. a ceiling mount; 7. a hydrophobic layer; 8. a low temperature water supply pipe; 9. a pipeline; 10. a high-temperature water return pipe; 11. a roof; 12. a fin; 13. an insulating layer.
Detailed Description
The invention will be further described with reference to specific examples, but the scope of protection of the invention is not limited thereto:
the following cases were all:
the tail end device of the chilled water large temperature difference air conditioning system is used for being matched with a water chilling unit (hereinafter referred to as a water chilling unit) of the chilled water large temperature difference air conditioning system.
The radiation plate 3 and the air treatment unit 1 are both arranged indoors. The low-temperature water supply pipe 8 is connected with a water outlet of a water chilling unit of the chilled water large-temperature-difference air conditioning system.
The radiation plate 3 may be any one as shown in fig. 8 to 10 according to actual needs. The radiation plate 3 is composed of a heat exchange tube 2, fins 12 provided on the surface of the heat exchange tube 2, and connection plates for mounting the heat exchange tube 2 at both sides. This is conventional technology, and the connection plates are omitted from fig. 8 to 10 for clarity of the drawing.
The latent heat terminal includes air handling unit 1 and low temperature delivery pipe 8, and the one end of low temperature delivery pipe 8 links to each other with the delivery port of cooling water set, and the other end links to each other with the refrigerated water inlet of air handling unit 1. The air handling unit 1 may be implemented as a conventional fan coil unit.
The high temperature sensible tip comprises a radiant panel assembly consisting of one radiant panel 3.
The chilled water outlet of the air handling unit 1 is connected with the liquid inlet of the heat exchange tube 2 through a pipeline 9, and the liquid outlet of the heat exchange tube 2 is connected with the water inlet of the water chilling unit through a high-temperature return tube 10.
The radiation plate 3 is fixed under a roof 11 by a ceiling bracket 6; the radiation plate 3 is parallel to the ground. In particular, the ceiling brackets 6 may be connected to the connection plates of the radiation plates 3.
The low-temperature chilled water is obtained by a water chilling unit (which is a conventional technology), enters the air treatment unit 1 from a low-temperature water supply pipe 8, and bears all latent heat load and part of sensible heat load indoors. The chilled water after temperature rise enters the heat exchange tube 2 of the radiation plate 3 through the pipeline 9 to bear the residual indoor sensible heat load. The temperature in the pipeline 9 is 1-2 ℃ higher than the indoor dew point temperature. High-temperature return water flowing out of the heat exchange tubes 2 of the radiation plates 3 enters the water chilling unit through the high-temperature return pipe 10 to be cooled. The temperature difference between the water supply and the water return in the tail end device is 13-17 ℃.
The latent heat terminal includes air handling unit 1 and low temperature delivery pipe 8, and the one end of low temperature delivery pipe 8 links to each other with the delivery port of cooling water set, and the other end links to each other with the refrigerated water inlet of air handling unit 1. The air handling unit 1 is a conventional ceiling-mounted air handling unit.
The high-temperature sensible heat tail end comprises 2 sets of M-shaped radiation plate assemblies, and the 2 sets of M-shaped radiation plate assemblies are arranged on two sides of the air handling unit 1 in a bilateral symmetry mode. The symmetrical arrangement can improve the uniformity of the indoor temperature.
Each set of the radiation plate assembly of the 'M' type comprises a plurality of radiation plates 3, the radiation plates 3 are all arranged in an inclined way at 45 degrees, and the radiation plates 3 are connected end to end, so that the radiation plate assembly of the 'M' type is formed. The radiation plate assembly of the "M" type can reduce the installation height of the radiation plate 3.
Each radiation plate 3 is: the heat insulating layer 13 is provided on the upper surface of the radiation plate 3, and the heat insulating layer 13 prevents the radiation energy from flowing toward the roof 11 side. A hydrophobic layer 7 is provided on the lower surface of the radiation plate 3. Suitable openings (e.g. 2mm) are made in the hydrophobic layer 7 to allow for easier transport of cold to the areas of the chamber that need to be tempered. The thermal insulation layer 13, the radiation plate 3 and the hydrophobic layer 7 are provided in one piece. The hydrophobic layer 7 is made of a hydrophobic material, and the aperture of the open pore is small, so that the dripping of condensed water cannot be caused.
Fig. 7 is an exploded schematic view of a combination of two radiation plates 3 arranged in an inclined manner in order to clearly show the vertical position relationship between the components. The top of the fin 12 of 2 adjacent radiation plates 3 is folded into a V-shape (i.e., L-shape) of 90 degrees, i.e., the fin 12 of the adjacent radiation plate 3 can be integrally designed.
The condensate trough 5 is arranged along the bottom of the long side of the water-repellent layer 7, i.e. the length of the condensate trough 5 is equal to the length of the long side of the water-repellent layer 7. The water condensation tank 5 can be connected with the connecting plate of the radiation plate 3 through the galvanized steel plate 4, or the water condensation tank 5 can also be connected with the hydrophobic layer 7 through the galvanized steel plate 4. 2 adjacent radiation plates 3 can share a condensate trough 5.
The arrangement of the hydrophobic layer 7 and the condensate tank 5 enables the condensation generated by the radiation plate 3 not to affect the normal indoor environment. At this time, the condensate enters the condensate tank 5 by gravity and the air flow of the air handling unit 1.
The radiant panel 3 is secured under the roof 11 by ceiling brackets 6.
The chilled water outlet of the air handling unit 1 is connected with the liquid inlet of the heat exchange tube 2 of each radiation plate 3 through a pipeline 9, and the liquid outlet of the heat exchange tube 2 of each radiation plate 3 is connected with the water inlet of the water chilling unit through a high-temperature return pipe 10.
Fig. 4 is an enlarged partial top view of fig. 3 after rotation. The water path flow process of the cold water is similar to that of example 1. At the moment, the water paths enter the heat exchange tubes 2 of the radiation plates 3 through the same-stroke arrangement, and the same-stroke arrangement is favorable for hydraulic balance. The liquid inlet and the liquid outlet of the heat exchange tube 2 are arranged on the same side of the radiation plate 3.
The air supply of the air handling unit 1 sweeps across the surface of the radiant panel 3 along the long sides of the radiant panel 3. The size and installation position of the air handling unit 1 can be adjusted according to the height size of the radiation plate 3 and the size of the installation space.
The temperature difference between the water supply and the water return in the tail end device is 13-17 ℃.
The radiation plate assembly is arranged in a W shape, and the rest is identical to the embodiment 2. The "W" type radiation plate unit can also reduce the installation height of the radiation plate 3, and can appropriately reduce the number of condensate tanks 5 as compared with embodiment 2.
Fig. 6 is an enlarged partial top view of fig. 5 after rotation. The operation mode of the cold water is the same as that of the embodiment 2, namely, the cold water is also a pipeline with the same way, which is beneficial to the balance of the water channel.
At this time, the liquid inlet and the liquid outlet of the heat exchange tube 2 are respectively arranged at two sides of the radiation plate 3, and each radiation plate 3 is in a narrow and long single-row structure. The structure mode does not use a pipeline elbow, and the local resistance loss is reduced as much as possible.
The temperature difference between the water supply and the water return in the tail end device is 13-17 ℃.
Example 4, the radiation plate assembly of the "M" type in example 2 was changed to the radiation plate 3, that is, each radiation plate assembly was composed of only one radiation plate 3; the rest is equivalent to example 2. 2 radiation plates 3 are arranged at two sides of the air handling unit 1 in a left-right symmetrical manner after being inclined by 45 degrees; as shown in fig. 2; the air outlet of the air handling unit 1 faces the radiation plate 3.
As in embodiment 2, the upper surface of the radiation plate 3 is provided with the thermal insulation layer 13, the lower surface of the radiation plate 3 is provided with the hydrophobic layer 7, and the condensate tank 5 is arranged along the bottom of the long side of the hydrophobic layer 7; a condensate tank 5 is associated with each radiation plate 3.
Finally, it is also noted that the above-mentioned list is only a few specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and many modifications are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the invention should be considered as within the scope of the invention.
Claims (6)
1. The tail end device of the chilled water large temperature difference air conditioning system is matched with a water chilling unit of the chilled water large temperature difference air conditioning system for use; the method is characterized in that: comprises a latent heat end and a high temperature sensible heat end;
the latent heat end comprises an air handling unit (1) and a low-temperature water supply pipe (8); one end of the low-temperature water supply pipe (8) is connected with a water outlet of the water chilling unit, and the other end of the low-temperature water supply pipe is connected with a chilled water inlet of the air handling unit (1);
the high temperature sensible tip comprises a radiant panel assembly comprising at least one radiant panel (3); the radiant panel (3) consists of a heat exchange tube (2) and fins (12) arranged on the surface of the heat exchange tube (2); the chilled water outlet of the air handling unit (1) is connected with the liquid inlet of the heat exchange pipe (2) through a pipeline (9), and the liquid outlet of the heat exchange pipe (2) is connected with the water inlet of the water chilling unit through a high-temperature return pipe (10).
2. The terminal device of a chilled water large temperature difference air conditioning system according to claim 1, wherein:
a heat insulating layer (13) is arranged on the whole upper surface of the radiation plate (3), and a hydrophobic layer (7) is arranged on the whole lower surface of the radiation plate (3).
3. The terminal device of a chilled water large temperature difference air conditioning system according to claim 2, wherein: a condensate tank (5) is arranged at the long edge of one side of the hydrophobic layer (7).
4. The terminal device of a chilled water large temperature difference air conditioning system according to claim 3, wherein: the hydrophobic layer (7) is provided with holes.
5. The terminal device of the chilled water large temperature difference air conditioning system according to any one of claims 1 to 4, wherein: two sides of the air handling unit (1) are symmetrically provided with a radiation plate (3) which is inclined at an angle of 45 degrees.
6. The terminal device of the chilled water large temperature difference air conditioning system according to any one of claims 1 to 4, wherein:
the radiation plate assembly comprises at least four radiation plates (3), and the radiation plates (3) are inclined at an angle of 45 degrees and are connected end to end;
the two sides of the air handling unit (1) are symmetrically provided with a radiation plate component respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020821296.4U CN212585111U (en) | 2020-05-18 | 2020-05-18 | End device of chilled water large temperature difference air conditioning system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020821296.4U CN212585111U (en) | 2020-05-18 | 2020-05-18 | End device of chilled water large temperature difference air conditioning system |
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| CN212585111U true CN212585111U (en) | 2021-02-23 |
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| CN202020821296.4U Active CN212585111U (en) | 2020-05-18 | 2020-05-18 | End device of chilled water large temperature difference air conditioning system |
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