CN213066268U - Novel absorption type large-temperature-difference heat exchange unit with multiple chip systems - Google Patents
Novel absorption type large-temperature-difference heat exchange unit with multiple chip systems Download PDFInfo
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- CN213066268U CN213066268U CN202021703299.4U CN202021703299U CN213066268U CN 213066268 U CN213066268 U CN 213066268U CN 202021703299 U CN202021703299 U CN 202021703299U CN 213066268 U CN213066268 U CN 213066268U
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000006096 absorbing agent Substances 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 239000003507 refrigerant Substances 0.000 claims abstract description 17
- 230000009102 absorption Effects 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 8
- 230000005494 condensation Effects 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract 1
- 238000005192 partition Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 4
- 230000004308 accommodation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
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Abstract
A novel absorption type large-temperature-difference heat exchange unit with multiple chip systems relates to the technical field of absorption type heat exchangers. The utility model discloses heat exchanger unit adopts N level heat transfer system. The heat exchanger comprises 1N-stage sheet-type absorption heat pump and heat exchangers with the same number of stages. Each stage of the absorption heat pump comprises a generator, a condenser, an absorber, an evaporator and a solution heat exchanger. The primary heating media sequentially enter the generators of each stage, then enter the heat exchangers of each stage in parallel, are mixed after heat exchange, and then sequentially enter the evaporators of each stage for cooling. The secondary refrigerant water of each stage is divided into 2 paths, one path enters the sheet type absorption heat pump of the stage, and the other path enters the heat exchanger of the stage. In the plate type absorption heat pump, refrigerant water enters an absorber and a condenser in parallel or in series. The utility model discloses use single unit to realize the heating of many districts, can effectively reduce the load influence between each branch district, save equipment space and investment, it is convenient to have the regulation, and control range is big, load strong adaptability's characteristics.
Description
Technical Field
The utility model relates to an absorption heat exchanger technical field, especially piece formula multisystem's novel big difference in temperature heat exchanger unit of absorption.
Background
Along with the continuous increase of the scale of urban central heating, the absorption heat exchange unit is used for replacing the original plate in the heat exchange station, the temperature difference of supply water and return water of a primary network can be effectively increased, and the flow of the conveyed hot water is reduced, so that the initial investment of a transmission and distribution pipeline is reduced, and the power consumption of a water pump in the running process of the system is reduced.
However, in central heating, the heating station is usually required to supply heat in different zones according to different load requirements at the tail end of heat supply and different pressure bearing capacity of the heat exchanger, and the load change of each zone is asynchronous.
The existing absorption type large temperature difference units on the market at present are divided into the following categories:
1. single stage/multi-stage single system
The single-system absorption type large temperature difference unit can be divided into a single-stage, a double-stage and a multi-stage large temperature difference unit according to different heat exchange stages of the main machine. However, the unit can only supply heat to one heating area, and can not realize zone heating through a single unit.
Referring to fig. 1, a multi-stage absorption heat pump and a heat exchanger set proposed in chinese patent CN201720941207.8 includes a multi-stage generator, a multi-stage condenser, a multi-stage absorber, a multi-stage evaporator, and a water-water heat exchanger. The primary water flows out of the unit after sequentially passing through the generators at all levels, the plate exchanger and the evaporators at all levels. The secondary water enters the plate exchanger and the main machine in parallel and flows through the absorber and the condenser in sequence in the main machine. The unit can not realize district heating when central heating, and is limited to the use of multi-district heating demand.
2. Single/multi-stage dual system
The existing double-system unit can be divided into single-plate replacement and double-plate replacement according to the different replacement numbers of unit matching plates. The system can be divided into single-stage, double-stage and multi-stage according to different heat exchange stages of the main machine, and the system connection mode of single-plate exchange and double-plate exchange is described below by taking the double-stage main machine as an example.
2.1 Dual System Single Board exchange
Referring to fig. 2, in the dual-system single-board heat exchanger unit, the board heat exchanger solely bears the heat supply load of one partition, and the host machine bears the heat supply load of the other partition. The primary water flows out of the unit after sequentially passing through the generators at all levels, the plate exchanger and the evaporators at all levels. The secondary water in the subarea 1 is heated to the target temperature through the plate exchange, and the secondary water in the subarea 2 is heated to the target temperature through the absorbers and the condensers of all stages of the main machine.
2.2 Dual System Dual Board exchange
Referring to fig. 3, in the dual-system dual-plate heat exchanger set, the host + plate heat exchanger bears the heat supply load of one partition, and the other plate heat exchanger bears the heat supply load of one partition alone. The primary water sequentially passes through the generators at all levels, then enters the two plates in parallel for replacement, is mixed after being discharged from the plates for replacement, enters the evaporators at all levels, and flows out of the unit after being cooled. The secondary water in the subarea 1 is heated to the target temperature through the plate exchange, the secondary water in the subarea 2 is heated to the target temperature after being connected in parallel through the main machine and the plate exchange, and the flow in the main machine is that the secondary water sequentially flows through the absorbers and the condensers at all stages.
In the flow of the double-system single-board replacement and the double-system double-board replacement, one board is replaced to independently bear the heat supply load of one subarea. When the load of one of the two partitions changes, the load of the other partition is inevitably influenced.
Disclosure of Invention
To the not enough of existence among the above-mentioned prior art, the utility model provides a piece formula multisystem's novel big difference in temperature heat exchanger unit of absorption formula. The multi-zone heating system has the advantages that the single unit is used for realizing multi-zone heating, the load influence among the zones can be effectively reduced, the equipment space and the investment are saved, and the multi-zone heating system has the characteristics of convenience in adjustment, large adjustment range and strong load adaptability.
In order to achieve the above object, the technical solution of the present invention is implemented as follows:
a novel absorption type large-temperature-difference heat exchange unit with multiple chip systems adopts N-stage heat exchange systems, wherein N is a natural number not less than 2. The structure is characterized by comprising 1N-stage absorption heat pump and heat exchangers with the same number of stages. Each stage of the absorption heat pump comprises a generator, a condenser, an absorber, an evaporator and a solution heat exchanger, wherein each stage of the evaporator is provided with a refrigerant pump connected to a liquid distribution device in the evaporator, each stage of the absorber is provided with a solution pump connected to the solution heat exchanger, the generation, condensation, evaporation and absorption processes of each stage are mutually independent, and solutions are not mixed. The primary heating media sequentially enter the generators of each stage, then enter the heat exchangers of each stage in parallel, are mixed after heat exchange, and sequentially enter the evaporators of each stage to be cooled again. The secondary refrigerant water of each stage is divided into 2 paths, one path enters the sheet type absorption heat pump of the stage, and the other path enters the heat exchanger of the stage. In the plate type absorption heat pump, refrigerant water enters an absorber and a condenser in parallel or in series.
In the novel absorption type large temperature difference heat exchange unit, the heat exchanger adopts a mode of being completely connected with the sheet type absorption heat pump in parallel or only being connected with one of the absorber and the condenser in parallel according to different processes.
In the novel absorption type large-temperature-difference heat exchange unit, when the absorber and the condenser respectively bear two partition loads, the number of the heat exchangers is 2N.
The utility model discloses owing to adopted above-mentioned structure, provided a solution of central heating second grade station list unit subregion heat supply. The utility model discloses can realize the subregion heat supply of single unit, and the load between a plurality of divisions influences each other for a short time, and accommodation range is big, has saved space and investment, has good load adaptability.
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
Drawings
FIG. 1 is a schematic diagram of a single system heat exchanger unit in the prior art;
fig. 2 is a schematic diagram of a dual-system single-board switch group in the prior art;
FIG. 3 is a diagram of a dual-system dual-board switch set in the prior art;
fig. 4 is a schematic diagram of a chip-type multi-system unit according to an embodiment of the present invention;
fig. 5 is a schematic view of a chip type dual-system unit in an embodiment of the present invention;
fig. 6 is a schematic view of a chip-type four-system unit according to an embodiment of the present invention.
Detailed Description
Referring to fig. 4, the utility model discloses big difference in temperature heat exchanger unit of novel absorption formula of piece formula multisystem, it adopts N level heat transfer system, and N is the natural number that is more than or equal to 2. The whole unit comprises 1N-stage sheet-type absorption heat pump 1 and heat exchangers with the same number of stages. Each stage of the absorption heat pump comprises a generator, a condenser, an absorber, an evaporator and a solution heat exchanger. Each stage of evaporator is provided with a refrigerant pump connected to a liquid distribution device in the evaporator, each stage of absorber is provided with a solution pump connected to a solution heat exchanger, the generation, condensation, evaporation and absorption processes of each stage are mutually independent, and solutions are not mixed. The primary heating media sequentially enter the generators of each stage, then enter the heat exchangers of each stage in parallel, are mixed after heat exchange, and sequentially enter the evaporators of each stage to be cooled again. The secondary refrigerant water of each stage is divided into 2 paths, one path enters the sheet type absorption heat pump of the stage, and the other path enters the heat exchanger of the stage. In the plate type absorption heat pump, refrigerant water enters an absorber and a condenser in parallel or in series. The heat exchanger adopts a mode of being completely connected with the sheet type absorption heat pump 1 in parallel or only being connected with one of the absorber and the condenser in parallel according to different processes. The absorber and the condenser can also bear two partition loads respectively, and in this case, the number of the heat exchangers can be 2N.
Referring to fig. 5, the plate type double-system unit comprises 1 plate type absorption heat pump 1 and 2 heat exchangers. The external loop comprises a primary network loop, a subarea 1 secondary network loop and a subarea 2 secondary network loop; the internal circuit comprises 2 mutually independent solution circuits, 2 mutually independent refrigerant circuits and auxiliary pumps, solution heat exchangers, valves and the like.
When the sheet type double-system unit works, primary heating media sequentially enter the two-stage generator and then are divided into two paths to enter the two-stage heat exchanger, and after heat exchange, the primary heating media are mixed and sequentially enter each stage of evaporator to be cooled again, so that the return water temperature of the central heating hot water is greatly reduced. The secondary refrigerant water from the left subarea 1 is divided into 2 paths, one path enters the absorber of the stage, and the other path enters the heat exchanger of the stage. The flow of secondary chilled water in zone 2 on the right is similar to zone 1. According to different processes, the heat exchanger can be completely connected in parallel with the plate-type absorption heat pump 1, or can be connected in parallel with only one of the absorber or the condenser. The single-side host machine and the single-side plate can supply heat to one heat supply subarea, and the double-side host machine and the double-side plate can respectively supply heat to 2 heat supply subareas.
Referring to fig. 6, the plate-type four-system unit includes 1 plate-type absorption heat pump 1 and 4 heat exchangers. The external loop comprises a primary network loop, a subarea 1 secondary network loop, a subarea 2 secondary network loop, a subarea 3 secondary network loop and a subarea 4 secondary network loop; the internal circuit comprises 2 mutually independent solution circuits, 2 mutually independent refrigerant circuits and auxiliary pumps, solution heat exchangers, valves and the like.
When the sheet type four-system unit works, primary heat media sequentially enter the two-stage generator, then are divided into 4 paths and enter the 4 heat exchangers, and after heat exchange, the heat media are mixed and sequentially enter each stage of evaporator to be cooled again. The secondary refrigerant water from the left lower subarea 1 is divided into 2 paths, one path enters the absorber of the stage, and the other path enters the subarea 1 heat exchanger. The secondary refrigerant water of the upper left subarea 2 is divided into 2 paths, one path enters the condenser of the stage, and the other path enters the subarea 2 heat exchanger. The flow of the secondary refrigerant water in the upper right subarea 3 and the lower right subarea 4 is similar to that of the subareas 1 and 2. Therefore, 1 host machine and 4 platens can supply heat respectively by reversing 4 heat supply subareas.
Claims (3)
1. The novel absorption type large-temperature-difference heat exchange unit is characterized by comprising 1N-stage absorption heat pump (1) and heat exchangers with the same number as the stages, wherein each stage of absorption heat pump (1) comprises a generator, a condenser, an absorber, an evaporator and a solution heat exchanger, each stage of evaporator is provided with a refrigerant pump connected to a liquid distribution device in the evaporator, each stage of absorber is provided with a solution pump connected to the solution heat exchanger, the generation, condensation, evaporation and absorption processes of each stage are mutually independent, and the solutions are not mixed; the primary heating media sequentially enter the generators of each stage, then enter the heat exchangers of each stage in parallel, are mixed after heat exchange, and sequentially enter the evaporators of each stage to be cooled again; dividing the secondary refrigerant water of each stage into 2 paths, wherein one path enters the sheet type absorption heat pump of the stage, and the other path enters the heat exchanger of the stage; in the plate type absorption heat pump, refrigerant water enters an absorber and a condenser in parallel or in series.
2. The new absorption type large temperature difference heat exchanger unit of multi-system in sheet type according to claim 1, wherein the heat exchanger adopts a mode of being completely connected in parallel with the absorption type heat pump (1) in sheet type or being connected in parallel with only one of the absorber and the condenser according to different processes.
3. The new absorption type large temperature difference heat exchanger unit of multi-system chip type according to claim 1 or 2, wherein the number of heat exchangers is 2N when the absorber and the condenser bear two zone loads respectively.
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| CN202021703299.4U CN213066268U (en) | 2020-08-17 | 2020-08-17 | Novel absorption type large-temperature-difference heat exchange unit with multiple chip systems |
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| CN202021703299.4U CN213066268U (en) | 2020-08-17 | 2020-08-17 | Novel absorption type large-temperature-difference heat exchange unit with multiple chip systems |
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