CN112524679A - Pipeline heat accumulating type air source heat pump secondary heating hot water system - Google Patents
Pipeline heat accumulating type air source heat pump secondary heating hot water system Download PDFInfo
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- CN112524679A CN112524679A CN202011281457.6A CN202011281457A CN112524679A CN 112524679 A CN112524679 A CN 112524679A CN 202011281457 A CN202011281457 A CN 202011281457A CN 112524679 A CN112524679 A CN 112524679A
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- heat pump
- hot water
- air source
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 124
- 238000010438 heat treatment Methods 0.000 title claims abstract description 65
- 238000005338 heat storage Methods 0.000 claims abstract description 34
- 238000009825 accumulation Methods 0.000 claims description 2
- 230000001502 supplementing effect Effects 0.000 claims description 2
- 239000008399 tap water Substances 0.000 abstract description 10
- 235000020679 tap water Nutrition 0.000 abstract description 10
- 238000000034 method Methods 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 6
- 229910001220 stainless steel Inorganic materials 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000008236 heating water Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004429 Calibre Substances 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- F24D17/00—Domestic hot-water supply systems
- F24D17/02—Domestic hot-water supply systems using heat pumps
-
- 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
-
- 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
- F24D2200/00—Heat sources or energy sources
- F24D2200/12—Heat pump
-
- 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
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/10—Heat storage materials, e.g. phase change materials or static water enclosed in a space
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a pipeline heat accumulating type air source heat pump two-stage heating and water heating system, which comprises: the heat exchangers are connected in parallel, and each heat exchanger comprises a primary side and a secondary side which are isolated from each other and can exchange heat; the primary side heating module is respectively communicated with the primary side of each heat exchanger; and the secondary side heating module is respectively communicated with the secondary side of each heat exchanger. The primary side of the invention is not directly contacted with tap water, scaling is avoided, and the operation is more stable and efficient; tap water is stored in the hot water tank after being subjected to heat exchange through the heat exchanger, and is supplied to the tail end after being subjected to secondary side heat pump group two-stage heating, so that the system is simple and reliable, the investment is saved, the problem of different sources of cold and hot water is thoroughly solved, and the tail end water is not suddenly cooled and suddenly heated; meanwhile, the pipeline is adopted for heat storage, so that the purchasing cost is reduced, the working efficiency of the heat pump is improved, and the operating cost is greatly reduced.
Description
Technical Field
The invention relates to the technical field of heat pump hot water production, in particular to a pipeline heat accumulating type air source heat pump secondary heating hot water production system.
Background
The heat pump water heating technology is commonly used in places such as hotels, hospitals, office buildings, factories and the like, and the heat pump water heating technology adopted in the prior art adopts open stainless steel water tank water storage and then conveys the water to each terminal through a constant-pressure variable-frequency water feeding pump, so that the multi-terminal hot water requirements of the places such as the hotels, the hospitals, the office buildings, the factories and the like can be basically met. However, the open stainless steel water tank and the constant-pressure variable-frequency water supply system have large occupied area, high cost and large investment, and the heat pump is directly contacted with tap water, so that the scale formation is serious; because the hot water constant-pressure variable-frequency water supply system and the tap water constant-pressure variable-frequency water supply system are different in source, the pressure of cold and hot water at the tail end is often unstable and unbalanced, and the phenomenon of sudden cooling and sudden heating occurs when the tail end uses water; in addition, because the open stainless steel water tank is arranged at the water inlet of the air source heat pump, when the temperature of the open stainless steel water tank is constant (for example, 55 ℃), the water inlet temperature of the air source heat pump is actually the temperature of the open stainless steel water tank, the heating performance coefficient is low, and the operation cost is increased.
Disclosure of Invention
According to an embodiment of the present invention, there is provided a pipe heat accumulating type air source heat pump two-stage heating and water heating system, including:
the heat exchangers are connected in parallel, and each heat exchanger comprises a primary side and a secondary side which are isolated from each other and can exchange heat;
the primary side heating module is respectively communicated with the primary side of each heat exchanger;
and the secondary side heating module is respectively communicated with the secondary side of each heat exchanger.
Further, the primary side heating module comprises a primary side heat pump combination and a heat storage pipeline combination;
the inlet of the primary side heat pump combination is communicated with the outlets of the primary sides of the plurality of heat exchangers, the outlet of the primary side heat pump combination is communicated with the inlet of the heat storage pipeline combination, and the outlets of the heat storage pipeline combination are respectively communicated with the inlets of the primary sides of the plurality of heat exchangers;
the primary side heat pump combination comprises a plurality of groups of primary side heat pump groups which are mutually connected in parallel, and each group of primary side heat pump groups comprises a plurality of primary side air source heat pumps;
the heat storage pipeline combination comprises a plurality of groups of heat storage pipeline groups, and each group of heat storage pipeline group comprises a plurality of heat storage pipelines.
Further, a plurality of primary side air source pumps of each primary side heat pump set are connected in parallel or in series-parallel.
Further, the primary side air source heat pump is a normal temperature air source heat pump.
Furthermore, the heat storage pipeline groups are connected in parallel or in series-parallel, and the heat storage pipelines of each heat storage pipeline group are connected in parallel or in series-parallel.
Further, the primary-side heating module further includes: and the expansion water tank is communicated with an inlet of the primary side heat pump combination and is used for supplementing water to the primary side heat pump combination at a constant pressure.
Further, the heat exchanger is a directly-heated plate heat exchanger.
Further, the secondary side heating module includes:
the hot water tanks correspond to the heat exchangers one by one, and an inlet of each hot water tank is communicated with an outlet of the secondary side of the corresponding heat exchanger;
the hot water supply pipeline is respectively communicated with the outlets of the plurality of hot water tanks and is used for supplying hot water to the tail end;
the hot water return pipelines are respectively communicated with inlets of secondary sides of the heat exchangers and are used for recovering hot water with unused tail ends;
the hot water replenishing pipeline is communicated with inlets of the secondary sides of the plurality of heat exchangers respectively and is used for replenishing water to the hot water supply pipeline;
the system comprises a plurality of groups of secondary side heat pump sets, wherein the plurality of groups of secondary side heat pump sets correspond to a plurality of hot water tanks one by one, each group of secondary side heat pump sets comprises a plurality of secondary side air source heat pumps connected in series or in parallel or in series and used for heating and preserving heat of hot water in the plurality of hot water tanks.
Further, the secondary side air source heat pump is a high-temperature air source heat pump.
According to the pipe heat accumulating type air source heat pump secondary heating and water heating system disclosed by the embodiment of the invention, the primary side and the secondary side heating modules are mutually isolated, so that the primary side is not directly contacted with tap water any more, scaling is avoided, and the operation is more stable and efficient; tap water directly exchanges heat with the primary side heating module through the heat exchanger, is stored in the hot water tank, is heated by the secondary side heat pump set in a secondary side two-stage mode and is supplied to the tail end, a new hot water constant-pressure variable-frequency water supply system is not needed, the system is simple and reliable, the investment is saved, the problem of different sources of cold and hot water is thoroughly solved, and the tail end water is not suddenly cooled and suddenly heated; meanwhile, the pipeline is used for heat storage, so that the purchasing cost is reduced, the operation cost is reduced, and the operation efficiency is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and are intended to provide further explanation of the claimed technology.
Drawings
Fig. 1 is a schematic diagram of a pipeline heat accumulating type air source heat pump two-stage heating water heating system according to an embodiment of the invention.
Detailed Description
The present invention will be further explained by describing preferred embodiments of the present invention in detail with reference to the accompanying drawings.
First, a pipe heat accumulating type air source heat pump secondary heating and water heating system according to an embodiment of the present invention will be described with reference to fig. 1, which is used in a hotel, a hospital, an office building, a factory, and other scenes, and has a wide application scene, and is particularly suitable for an existing building energy saving reconstruction scene with a limited site.
As shown in fig. 1, the pipe heat accumulating type air source heat pump secondary heating water heating system according to the embodiment of the present invention includes a plurality of heat exchangers 1, a primary side heating module, and a secondary side heating module. In this embodiment, the heating module that once inclines is closed water system, not direct and running water contact, and the operation is more stable, high-efficient not scale deposit.
Specifically, as shown in fig. 1, a plurality of heat exchangers 1 are connected in parallel, each heat exchanger 1 includes a primary side 11 and a secondary side 12 which are isolated from each other and can perform heat exchange, the primary side heating module is respectively communicated with the primary side 11 of each heat exchanger 1, the secondary side heating module is respectively communicated with the secondary side 12 of each heat exchanger 1, tap water of the secondary side heating module is heated by the heat exchanger 1 and then stored in a hot water tank 34, and is heated by a secondary side heat pump group 35 and then supplied to a terminal, a new hot water constant-pressure variable-frequency water supply system is not needed, the system is simple and reliable, investment is saved, meanwhile, the problem of different sources of cold and hot water is thoroughly solved, and the phenomenon; in the present embodiment, the heat exchanger 1 is a directly-heated plate heat exchanger, and the specific setting number is based on: the water resistance is within 2 meters of water column, according to the maximum design hour water consumption, under the working condition of the whole year, the water supplement of tap water can be directly heated to more than 50 ℃.
Specifically, as shown in fig. 1, the primary-side heating module includes a primary-side heat pump assembly 21 and a heat storage pipe assembly 22, wherein an inlet of the primary-side heat pump assembly 21 is communicated with outlets of primary sides of the plurality of heat exchangers 1, an outlet of the primary-side heat pump assembly 21 is communicated with an inlet of the heat storage pipe assembly 22, and outlets of the heat storage pipe assembly 22 are respectively communicated with inlets of primary sides of the plurality of heat exchangers 1, so as to form a water cycle of the primary side. Because the heat storage pipeline combination 22 is located at the water outlet of the primary side heat pump combination 21, the working efficiency of the primary side heat pump combination 21 is greatly improved, for example, when 55 ℃ is stored, the actual water inlet temperature of the primary side heat pump combination 21 is 50 ℃, the water outlet temperature is 55 ℃, and the working efficiency of the heat pump is improved by more than 10%.
Further, as shown in fig. 1, the primary-side heat pump assembly 21 has a plurality of sets of primary-side heat pump groups 211 connected in parallel, each set of primary-side heat pump groups 211 has a plurality of primary-side air-source heat pumps 2111, the primary-side air-source heat pumps 2111 of each set can be connected in parallel or in series, and the specific number is configured according to 120% of the maximum daily design water consumption. In this embodiment, the primary-side air-source heat pump 2111 is a normal-temperature air-source heat pump.
Further, as shown in fig. 1, the heat storage pipe assembly 22 has a plurality of heat storage pipe sets 221, each heat storage pipe set 221 includes a plurality of heat storage pipes, the heat storage pipe sets 221 may be connected in parallel, series, or series-parallel, and the heat storage pipes of each set may also be connected in parallel, series, or series-parallel. In this embodiment, the heat storage pipeline adopts ordinary carbon steel pipeline heat accumulation, and every length is 3~12m, and the diameter is DN500-DN2000, adopts heavy-calibre welding, and concrete quantity according to actual hot water peak hour water consumption design can, area is little, arranges in a flexible way, need not the stainless steel water tank, saves the investment by a wide margin.
Further, the primary side heating module is further provided with: and an expansion tank (not shown) which is communicated with an inlet of the primary side heat pump assembly 21, wherein the primary side circulation heating water in the primary side heating module comes from the expansion tank, and the expansion tank supplies water for the primary side heat pump assembly 21 under constant pressure.
Specifically, as shown in fig. 1, the secondary-side heating module includes: a plurality of hot water tanks 34, a hot water supply pipeline 31, a hot water return pipeline 32, a hot water replenishing pipeline 33 and a plurality of secondary side heat pump sets 35.
Further, as shown in fig. 1, hot water supply lines 31 are respectively communicated with outlets on the secondary sides of the plurality of heat exchangers 1 for supplying hot water to the ends; the hot water return pipeline 32 is respectively communicated with inlets of the secondary sides 12 of the plurality of heat exchangers 1 and is used for recovering hot water with unused tail ends and keeping the hot water stored in each tail end pipeline in a circulating state, so that the phenomenon that the temperature is greatly reduced due to the fact that the hot water does not flow in the pipelines for a long time and the hot water needs to be discharged for a long time when used is avoided, on one hand, water resources are wasted, and on the other hand, user experience is influenced; the hot water replenishing pipe line 33 is communicated with inlets of the secondary sides 12 of the plurality of heat exchangers 1, respectively, and is used for replenishing water to the hot water supplying pipe line 31.
In the present embodiment, as shown in fig. 1, a plurality of hot water tanks 34 are corresponding to a plurality of heat exchangers 1 one by one, and each hot water tank 34 is disposed between the outlet of the secondary side 12 of the corresponding heat exchanger 1 and the hot water supply pipeline 31 for keeping warm of the hot water at the end to ensure the timely supply of the hot water at the end.
Further, as shown in fig. 1, in the embodiment, a plurality of groups of secondary side heat pump groups 35 correspond to a plurality of hot water tanks one by one, and each group of secondary side heat pump groups 35 has a plurality of secondary side air source heat pumps 351 connected in series or in parallel or in series-parallel, and is used for heating and preserving heat of hot water in the plurality of hot water tanks 34, so as to further improve user experience. In the present embodiment, the secondary air source heat pump 351 is a high temperature air source heat pump.
When the heat storage pipe is used, a temperature sensor is mounted on the heat storage pipe, the temperature of the stored water in the heat storage pipe is set according to the actual water temperature demand of a user, when the actual temperature is lower than the temperature, the primary side air source heat pump 2111 is started, and when the actual temperature is higher than the temperature, the heat storage pipe is stopped. Specifically, a plurality of heat pump start-stop control intervals can be set according to the grouping condition of the actual primary-side air source heat pumps 2111, and each primary-side air source heat pump 2111 does not need to work at the same time, so that the operation efficiency is further improved, and the operation cost is reduced; similarly, the control principle of the secondary air source heat pump 351 is the same as that of the primary air source heat pump 2111, and the description thereof is omitted.
In the above, referring to fig. 1, a pipe heat accumulating type air source heat pump secondary heating and water heating system according to an embodiment of the present invention is described, in which a primary side and a secondary side heating module are isolated from each other, so that the primary side is no longer in direct contact with tap water, scaling does not occur, and the operation is more stable and efficient; tap water directly exchanges heat with the primary side heating module through the heat exchanger, is stored in the hot water tank, is heated by the secondary side heat pump set in a secondary side two-stage mode and is supplied to the tail end, a new hot water constant-pressure variable-frequency water supply system is not needed, the system is simple and reliable, the investment is saved, the problem of different sources of cold and hot water is thoroughly solved, and the tail end water is not suddenly cooled and suddenly heated; meanwhile, the pipeline is used for heat storage, so that the purchasing cost is reduced, the operation cost is reduced, and the operation efficiency is improved.
It should be noted that, in the present specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (9)
1. The utility model provides a pipeline heat accumulation formula air source heat pump secondary heating system hot water system which characterized in that contains:
the heat exchangers are connected in parallel, and each heat exchanger comprises a primary side and a secondary side which are isolated from each other and can exchange heat;
the primary side heating module is respectively communicated with the primary side of each heat exchanger;
and the secondary side heating modules are respectively communicated with the secondary side of each heat exchanger.
2. The pipe heat accumulating type air source heat pump secondary heating and water heating system as claimed in claim 1, wherein the primary side heating module comprises a primary side heat pump assembly and a heat accumulating pipe assembly;
the inlet of the primary side heat pump combination is communicated with the outlets of the primary sides of the plurality of heat exchangers, the outlet of the primary side heat pump combination is communicated with the inlet of the heat storage pipeline combination, and the outlets of the heat storage pipeline combination are respectively communicated with the inlets of the primary sides of the plurality of heat exchangers;
the primary side heat pump combination comprises a plurality of groups of primary side heat pump groups which are mutually connected in parallel, and each group of primary side heat pump groups comprises a plurality of primary side air source heat pumps;
the heat storage pipeline combination comprises a plurality of groups of heat storage pipeline groups, and each group of heat storage pipeline groups comprises a plurality of heat storage pipelines.
3. The tube heat accumulating type air source heat pump secondary heating and water heating system as claimed in claim 2, wherein a plurality of the primary air source pumps of each of the primary heat pump groups are connected in parallel or in series-parallel.
4. The pipe heat accumulating type air source heat pump secondary heating and water heating system as claimed in claim 2 or 3, wherein the primary side air source heat pump is an ambient temperature air source heat pump.
5. The pipe heat accumulating type air source heat pump secondary heating and water heating system as claimed in claim 2, wherein the heat accumulating pipe groups are connected in parallel or in series-parallel, and the heat accumulating pipes of each heat accumulating pipe group are connected in parallel or in series-parallel.
6. The pipe heat accumulating type air source heat pump secondary heating and water heating system as claimed in claim 2, wherein the primary side heating module further comprises: and the expansion water tank is communicated with an inlet of the primary side heat pump combination and is used for supplementing water to the primary side heat pump combination at a constant pressure.
7. The pipe heat accumulating type air source heat pump two-stage heating and water heating system as claimed in claim 1, wherein the heat exchanger is a direct-heating plate type heat exchanger.
8. The pipe heat accumulating type air source heat pump secondary heating hot water system as claimed in claim 1, wherein the secondary side heating module comprises:
the hot water tanks correspond to the heat exchangers one by one, and an inlet of each hot water tank is communicated with an outlet of the secondary side of the corresponding heat exchanger;
the hot water supply pipeline is respectively communicated with the outlets of the plurality of hot water tanks and is used for supplying hot water to the tail end;
the hot water return pipelines are respectively communicated with inlets of secondary sides of the heat exchangers and are used for recovering hot water with unused tail ends;
the hot water replenishing pipeline is communicated with inlets of the secondary sides of the plurality of heat exchangers respectively and is used for replenishing water to the hot water supply pipeline;
the system comprises a plurality of groups of secondary side heat pump sets, wherein the plurality of groups of secondary side heat pump sets correspond to the plurality of hot water tanks one by one, and each group of secondary side heat pump sets comprises a plurality of secondary side air source heat pumps connected in series or in parallel or in series-parallel and is used for heating and preserving heat of hot water in the plurality of hot water tanks.
9. The pipe heat accumulating type air source heat pump secondary heating hot water system as claimed in claim 8, wherein the secondary side air source heat pump is a high temperature air source heat pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011281457.6A CN112524679A (en) | 2020-11-16 | 2020-11-16 | Pipeline heat accumulating type air source heat pump secondary heating hot water system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011281457.6A CN112524679A (en) | 2020-11-16 | 2020-11-16 | Pipeline heat accumulating type air source heat pump secondary heating hot water system |
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| CN112524679A true CN112524679A (en) | 2021-03-19 |
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