CN220379862U - Solar heat collection combined phase-change energy storage efficient refrigerating and hot water central air conditioner - Google Patents
Solar heat collection combined phase-change energy storage efficient refrigerating and hot water central air conditioner Download PDFInfo
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- CN220379862U CN220379862U CN202320734652.2U CN202320734652U CN220379862U CN 220379862 U CN220379862 U CN 220379862U CN 202320734652 U CN202320734652 U CN 202320734652U CN 220379862 U CN220379862 U CN 220379862U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 238000004146 energy storage Methods 0.000 title claims abstract description 43
- 238000005057 refrigeration Methods 0.000 claims abstract description 46
- 238000010521 absorption reaction Methods 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 238000005338 heat storage Methods 0.000 claims description 25
- 238000009826 distribution Methods 0.000 claims description 12
- 230000007704 transition Effects 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000498 cooling water Substances 0.000 abstract 1
- 239000008236 heating water Substances 0.000 abstract 1
- 239000003350 kerosene Substances 0.000 description 13
- 238000004378 air conditioning Methods 0.000 description 8
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 8
- 239000011232 storage material Substances 0.000 description 4
- 238000011217 control strategy Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- STECJAGHUSJQJN-USLFZFAMSA-N LSM-4015 Chemical compound C1([C@@H](CO)C(=O)OC2C[C@@H]3N([C@H](C2)[C@@H]2[C@H]3O2)C)=CC=CC=C1 STECJAGHUSJQJN-USLFZFAMSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
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Abstract
The utility model provides a solar heat collection combined phase-change energy storage efficient central air conditioner which is suitable for all-weather use throughout the year for cooling water, heating water and heating, and comprises a refrigeration main unit, a solar heat collection system and a phase-change energy storage device; wherein the refrigerating unit comprises an electric energy refrigerating unit and an absorption refrigerating unit; an electric energy refrigerating unit is connected with an absorption refrigerating unit in series to form a group of solar refrigerating unit chains, and the heat energy input end of the absorption refrigerating unit is connected with the heat supply end of the solar heat collection system; the two electric energy refrigerating main units are connected in series to form a group of electric energy refrigerating unit chains; the refrigerating unit at least comprises a group of solar refrigerating unit chains and a group of electric energy refrigerating unit chains. The high-temperature solar straight-through type inner focusing heat collecting pipe collecting technology and the double-effect absorption refrigerating unit are introduced, so that the problems of high energy consumption and low carbon emission in manufacturing cold and hot water by a central air conditioner of a large building all the year round can be solved, and the energy consumption can be reduced by more than fifty percent.
Description
Technical Field
The utility model relates to a central air conditioning system, in particular to a high-efficiency refrigerating and hot water central air conditioner utilizing solar heat collection and phase change energy storage.
Background
The highest benefit of the central air conditioning system in use of all large buildings in summer is that a water-cooled variable frequency centrifugal unit is added with a cooling tower, a water pump and an automatic control system, the SCOP of the whole refrigerating system is approximately equal to 3.0, a natural gas boiler or an electric heating boiler is generally used in winter heating, the use of a coal-fired steam boiler is forbidden, and basically the carbon emission of the whole year is quite high, so the central air conditioning system becomes the main angle (60-80%) of the carbon emission of the large buildings.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides the solar heat collection combined phase-change energy storage high-efficiency refrigerating hot water central air conditioner, wherein the heat collection device is added on the basis of the existing refrigerating main unit using electric energy, and various working modes can be switched and combined according to different use conditions so as to reduce energy consumption.
The present utility model achieves the above object by:
the solar heat collection combined phase-change energy storage high-efficiency refrigerating hot water central air conditioner comprises a refrigerating main unit, a solar heat collection system and a phase-change energy accumulator;
wherein the refrigerating unit comprises an electric energy refrigerating unit and an absorption refrigerating unit; an electric energy refrigerating unit is connected with an absorption refrigerating unit in series to form a group of solar refrigerating unit chains, and the heat energy input end of the absorption refrigerating unit is connected with the heat supply end of the solar heat collection system; the two electric energy refrigerating main units are connected in series to form a group of electric energy refrigerating unit chains; the refrigerating unit at least comprises a group of solar refrigerating unit chains and a group of electric energy refrigerating unit chains;
the cold water outlet of the refrigerating main unit is connected to a first-stage cold water conveying pipeline through a cold-producing circulating water pump, a cold quantity conveying variable frequency pump is further arranged in the first-stage cold water conveying pipeline in series, the outlet of the cold quantity conveying variable frequency pump is conveyed to an air supply system of a user through a second-stage cold water conveying pipeline, the outlet of the air supply system is connected to a return water conveying pipeline, and the return water conveying pipeline is connected to a water inlet of the refrigerating main unit; one end of the phase change energy accumulator is connected to a first-stage cold water conveying pipeline between the cold-producing circulating water pump and the cold quantity conveying variable frequency pump through a pipeline, and one end of the phase change energy accumulator is connected to a backwater conveying pipeline through a pipeline; the system can control the refrigerating capacity of the refrigerating main unit, the flow of the cold-producing circulating water pump and the cold capacity conveying variable frequency pump according to the requirement to realize the energy storage and the release energy storage of the phase change energy accumulator, and the system specifically comprises the following steps:
when the phase-change energy accumulator stores energy, the transportation capacity of the cold energy transportation variable frequency pump is reduced and/or the flow of a cold water outlet of the refrigerating main unit is increased, so that the water pressure in the pipeline of the first-stage cold water transportation pipe is larger than that of the return water transportation pipe, cold water in the pipeline of the first-stage cold water transportation pipe flows into the phase-change energy accumulator through the pipeline to enable an energy storage material in the phase-change energy accumulator to generate phase-change energy storage, and the temperature of the cold water rises Gao and flows out of the phase-change energy accumulator through the other end to enter the return water transportation pipeline;
when the phase change energy accumulator releases energy storage, the conveying capacity of the cold energy conveying variable frequency pump is increased and/or the flow rate of a cold water outlet of the refrigerating main unit is reduced, and even the refrigerating main unit is closed, so that the water pressure in a return water conveying pipe pipeline is larger than that of the first-stage cold water conveying pipe, water in the return water conveying pipe flows into an energy storage material of the phase change energy accumulator in the phase change energy accumulator through the pipeline to generate phase change energy storage, so that the return water flows out of the phase change energy accumulator through the other end after being cooled, enters the first-stage cold water conveying pipeline, and then enters the second-stage cold water conveying pipeline to be conveyed to an air supply system of a user after being pressurized by the cold energy conveying variable frequency pump.
The solar heat collection system comprises at least a solar heat collection tube, an oil tank and a heat storage tank which are connected in series, wherein the heat medium outlet end of the solar heat collection tube is connected to the oil tank, the oil tank is connected to the high Wen Shuru end of the heat storage tank, the high temperature output end of the heat storage tank is a heat energy input end of which the heat supply end is connected to a heat supply loop of the absorption refrigerating unit, the output end of the heat supply loop of the absorption refrigerating unit is connected to the low temperature input end of the heat storage tank, and the low temperature input and output end of the heat storage tank is connected to the heat medium inlet end of the solar heat collection tube.
Wherein, a heating system is also arranged; the high temperature output end of the heat storage tank is provided with a distribution valve, the input tank of the distribution valve is connected with the high temperature output end of the heat storage tank, one output end of the distribution valve is connected with the heat energy input end in the heat supply loop of the absorption refrigerating unit, the other input end of the distribution valve is connected with the input end of the heat supply system, and the output end of the heat supply system is connected to the low temperature input end of the heat storage tank.
The working strategy of the solar refrigerating unit chain and the electric energy refrigerating unit chain in the refrigerating unit comprises the following steps:
when the sun is sufficient, the solar energy refrigerating unit chain starts refrigerating and outputs cold water;
when no sun exists, if the central air conditioner has a refrigerating requirement, the chain of the electric energy type refrigerating unit starts refrigerating and outputs cold water; if the power supply cost is at a low value, the chain of the electric energy type refrigerating unit starts refrigerating and outputs cold water, and the phase-change energy accumulator is switched to an energy storage state.
The control strategy for the system to store and release the energy of the phase-change energy accumulator comprises the following steps:
when the refrigeration demand load is low and the sun is sufficient, the chain of the solar refrigerating unit starts refrigeration, and the phase-change energy accumulator is set to operate in an energy storage working state, so that the refrigeration capacity generated by the refrigerating main unit is stored in the phase-change energy accumulator; when no sun exists, the refrigeration demand load is low, and the power supply cost is low, the chain of the electric energy type refrigerating unit starts refrigeration, and the phase change energy accumulator is set to operate in an energy storage working state, so that the refrigeration capacity generated by the refrigerating main unit is stored in the phase change energy accumulator;
releasing an energy storage strategy, when the refrigeration demand load is higher and is larger than the load generated by the refrigeration main unit and the sun is sufficient, starting the refrigeration by the solar refrigeration unit chain, setting the phase change energy accumulator to operate in a working state of releasing energy storage, and enabling the system to meet the refrigeration demand load; when the refrigeration demand load is higher and is larger than the load generated by the refrigeration main unit and no sun exists, the chain of the electric energy type refrigeration unit starts refrigeration and sets the phase change energy accumulator to operate in a working state of releasing energy storage, so that the system can meet the refrigeration demand load.
The utility model has the beneficial effects that: the solar straight-through type inner focusing heat collecting tube is used for outputting high-temperature kerosene with the average temperature of about 200 ℃ in summer, so that the double-effect lithium bromide absorption refrigerating water unit can be pushed; the method comprises the steps of outputting medium-temperature kerosene with the average temperature of about 90 ℃ in winter, providing 65 ℃ hot water which is needed by heating in winter all the year round through a heat exchange plate, storing high-temperature heat energy of residual hot kerosene in a heat storage tank of the hot kerosene for use at night and later, using a solar energy and lithium bromide absorption refrigeration water unit to reduce the temperature of central air conditioning cold water to 11 ℃ in the period of sunlight in summer when cold water is produced in summer, then delivering the cold water to an electric energy refrigeration unit to reduce the temperature of the central air conditioning cold water from 11 ℃ to 6 ℃, and then pressurizing and conveying the cold water to air treatment machines at all places of a building through a secondary water system. When the solar energy period is not available at night in summer, the cold air consumption of the large building is greatly reduced, and only the electric energy refrigeration group is started, so that the most suitable peak-to-valley electricity price, the lowest heat dissipation environment temperature of the water tower and the highest efficiency working point of the centrifugal machine are used for refrigeration, and besides the current cold load of the large building is met, the residual refrigeration capacity can be stored in the phase-change energy storage system at +8deg.C for use in the next peak period. The high-temperature solar straight-through type inner focusing heat collecting pipe collecting technology and the double-effect absorption refrigerating unit are introduced, so that the problems of high energy consumption and low carbon emission in manufacturing cold and hot water by a central air conditioner of a large building all the year round can be solved, and the energy consumption can be reduced by more than fifty percent.
Drawings
The utility model is further described below with reference to the accompanying drawings:
fig. 1 is a schematic structural view of the present utility model.
Detailed Description
As shown in fig. 1, 1. A solar heat collection combined phase change energy storage high-efficiency refrigerating hot water central air conditioner is characterized in that: comprises a refrigerating main unit, a solar heat collecting system and a phase change energy accumulator.
Wherein the refrigerating unit comprises an electric energy refrigerating unit and an absorption refrigerating unit; an electric energy refrigerating unit is connected with an absorption refrigerating unit in series to form a group of solar refrigerating unit chains, and the heat energy input end of the absorption refrigerating unit is connected with the heat supply end of the solar heat collection system; the two electric energy refrigerating main units are connected in series to form a group of electric energy refrigerating unit chains; the refrigerating unit at least comprises a group of solar refrigerating unit chains and a group of electric energy refrigerating unit chains.
The cold water outlet of the refrigerating main unit is connected to a first-stage cold water conveying pipeline through a cold-producing circulating water pump, a cold quantity conveying variable frequency pump is further arranged in the first-stage cold water conveying pipeline in series, the outlet of the cold quantity conveying variable frequency pump is conveyed to an air supply system of a user through a second-stage cold water conveying pipeline, the outlet of the air supply system is connected to a return water conveying pipeline, and the return water conveying pipeline is connected to a water inlet of the refrigerating main unit; one end of the phase change energy accumulator is connected to a first-stage cold water conveying pipeline between the cold-producing circulating water pump and the cold quantity conveying variable frequency pump through a pipeline, and one end of the phase change energy accumulator is connected to a backwater conveying pipeline through a pipeline; the system can control the refrigerating capacity of the refrigerating main unit, the flow of the cold-producing circulating water pump and the cold capacity conveying variable frequency pump according to the requirement to realize the energy storage and the release energy storage of the phase change energy accumulator, and the system specifically comprises the following steps:
when the phase-change energy accumulator stores energy, the transportation capacity of the cold energy transportation variable frequency pump is reduced and/or the flow of a cold water outlet of the refrigerating main unit is increased, so that the water pressure in the pipeline of the first-stage cold water transportation pipe is larger than that of the return water transportation pipe, cold water in the pipeline of the first-stage cold water transportation pipe flows into the phase-change energy accumulator through the pipeline to enable an energy storage material in the phase-change energy accumulator to generate phase-change energy storage, and the temperature of the cold water rises Gao and flows out of the phase-change energy accumulator through the other end to enter the return water transportation pipeline;
when the phase change energy accumulator releases energy storage, the conveying capacity of the cold energy conveying variable frequency pump is increased and/or the flow rate of a cold water outlet of the refrigerating main unit is reduced, and even the refrigerating main unit is closed, so that the water pressure in a return water conveying pipe pipeline is larger than that of the first-stage cold water conveying pipe, water in the return water conveying pipe flows into an energy storage material of the phase change energy accumulator in the phase change energy accumulator through the pipeline to generate phase change energy storage, so that the return water flows out of the phase change energy accumulator through the other end after being cooled, enters the first-stage cold water conveying pipeline, and then enters the second-stage cold water conveying pipeline to be conveyed to an air supply system of a user after being pressurized by the cold energy conveying variable frequency pump.
The solar straight-through type inner focusing heat collecting tube is used for outputting high-temperature kerosene with the average temperature of about 200 ℃ in summer, so that the double-effect lithium bromide absorption refrigerating water unit can be pushed; the method comprises the steps of outputting medium-temperature kerosene with the average temperature of about 90 ℃ in winter, providing 65 ℃ hot water which is needed by heating in winter all the year round through a heat exchange plate, storing high-temperature heat energy of residual hot kerosene in a heat storage tank of the hot kerosene for use at night and later, using a solar energy and lithium bromide absorption refrigeration water unit to reduce the temperature of central air conditioning cold water to 11 ℃ in the period of sunlight in summer when cold water is produced in summer, then delivering the cold water to an electric energy refrigeration unit to reduce the temperature of the central air conditioning cold water from 11 ℃ to 6 ℃, and then pressurizing and conveying the cold water to air treatment machines at all places of a building through a secondary water system. When the solar energy period is not available at night in summer, the cold air consumption of the large building is greatly reduced, and only the electric energy refrigeration group is started, so that the most suitable peak-to-valley electricity price, the lowest heat dissipation environment temperature of the water tower and the highest efficiency working point of the centrifugal machine are used for refrigeration, and besides the current cold load of the large building is met, the residual refrigeration capacity can be stored in the phase-change energy storage system at +8deg.C for use in the next peak period. The high-temperature solar straight-through type inner focusing heat collecting pipe collecting technology and the double-effect absorption refrigerating unit are introduced, so that the problems of high energy consumption and low carbon emission in manufacturing of cold and hot water by a central air conditioner of a large building all year round are believed to be solved, and the energy consumption can be reduced by more than fifty percent.
The solar heat collection system comprises at least a solar heat collection tube, an oil tank and a heat storage tank which are connected in series. The solar heat collecting pipe is used for collecting solar energy to heat heating medium kerosene, the heating medium outlet end of the solar heat collecting pipe is connected to the oil tank, the oil tank is connected to the high Wen Shuru end of the heat storage tank to store heat of the high-temperature kerosene, when the absorption refrigerating unit operates, the heat storage tank inputs the high-temperature kerosene to a heating loop of the absorption refrigerating unit to drive the absorption refrigerating unit to perform refrigeration, and then the electric energy refrigerating unit of the absorption refrigerating unit is used for an air conditioning system to further refrigerate or is used for storing energy by the phase change energy accumulator. And then the kerosene is conveyed to a heat storage tank for preheating and then is conveyed to a solar heat collecting pipe for heating, so that circulation is formed.
In winter, the kerosene heated by the solar heat collecting pipe can be used for supplying heat to a heating system; the high temperature output end of the heat storage tank is provided with a distribution valve, the input tank of the distribution valve is connected with the high temperature output end of the heat storage tank, one output end of the distribution valve is connected with the heat energy input end in the heat supply loop of the absorption refrigerating unit, the other input end of the distribution valve is connected with the input end of the heat supply system, and the output end of the heat supply system is connected to the low temperature input end of the heat storage tank.
The inventor aims at improving the energy-saving effect of the system to the maximum and reducing the energy consumption, and for this reason, makes corresponding working strategies for a solar refrigerating unit chain and an electric energy refrigerating unit chain in the refrigerating unit, including:
when the sun is sufficient, the solar energy refrigerating unit chain starts refrigerating and outputs cold water;
when no sun exists, if the central air conditioner has a refrigerating requirement, the chain of the electric energy type refrigerating unit starts refrigerating and outputs cold water; if the power supply cost is at a low value, the chain of the electric energy type refrigerating unit starts refrigerating and outputs cold water, and the phase-change energy accumulator is switched to an energy storage state.
Meanwhile, the phase change energy accumulator is also subjected to energy storage and release energy storage, so that the following control strategies are specified:
when the refrigeration demand load is low and the sun is sufficient, the chain of the solar refrigerating unit starts refrigeration, and the phase-change energy accumulator is set to operate in an energy storage working state, so that the refrigeration capacity generated by the refrigerating main unit is stored in the phase-change energy accumulator; when no sun exists, the refrigeration demand load is low, and the power supply cost is low, the chain of the electric energy type refrigerating unit starts refrigeration, and the phase change energy accumulator is set to operate in an energy storage working state, so that the refrigeration capacity generated by the refrigerating main unit is stored in the phase change energy accumulator;
releasing an energy storage strategy, when the refrigeration demand load is higher and is larger than the load generated by the refrigeration main unit and the sun is sufficient, starting the refrigeration by the solar refrigeration unit chain, setting the phase change energy accumulator to operate in a working state of releasing energy storage, and enabling the system to meet the refrigeration demand load; when the refrigeration demand load is higher and is larger than the load generated by the refrigeration main unit and no sun exists, the chain of the electric energy type refrigeration unit starts refrigeration and sets the phase change energy accumulator to operate in a working state of releasing energy storage, so that the system can meet the refrigeration demand load.
Claims (3)
1. Solar energy collection combines high-efficient refrigeration hot water central air conditioner of phase transition energy storage, its characterized in that: the system comprises a refrigeration main unit, a solar heat collection system and a phase change energy accumulator;
wherein the refrigerating unit comprises an electric energy refrigerating unit and an absorption refrigerating unit; an electric energy refrigerating unit is connected with an absorption refrigerating unit in series to form a group of solar refrigerating unit chains, and the heat energy input end of the absorption refrigerating unit is connected with the heat supply end of the solar heat collection system; the two electric energy refrigerating main units are connected in series to form a group of electric energy refrigerating unit chains; the refrigerating unit at least comprises a group of solar refrigerating unit chains and a group of electric energy refrigerating unit chains;
the cold water outlet of the refrigerating main unit is connected to a first-stage cold water conveying pipeline through a cold-producing circulating water pump, a cold quantity conveying variable frequency pump is further arranged in the first-stage cold water conveying pipeline in series, the outlet of the cold quantity conveying variable frequency pump is conveyed to an air supply system of a user through a second-stage cold water conveying pipeline, the outlet of the air supply system is connected to a return water conveying pipeline, and the return water conveying pipeline is connected to a water inlet of the refrigerating main unit; one end of the phase change energy accumulator is connected to a first-stage cold water conveying pipeline between the cold-producing circulating water pump and the cold quantity conveying variable frequency pump through a pipeline, and one end of the phase change energy accumulator is connected to a backwater conveying pipeline through a pipeline; the system can control the refrigerating capacity of the refrigerating main unit, the flow of the cold-producing circulating water pump and the cold capacity conveying variable frequency pump according to the requirement to realize the energy storage and the release of the phase change energy accumulator.
2. The solar heat collection combined phase-change energy storage high-efficiency refrigerating hot water central air conditioner according to claim 1, wherein the solar heat collection combined phase-change energy storage high-efficiency refrigerating hot water central air conditioner is characterized in that: the solar heat collection system comprises at least a solar heat collection tube, an oil tank and a heat storage tank which are connected in series, wherein the heat medium outlet end of the solar heat collection tube is connected to the oil tank, the oil tank is connected to the high Wen Shuru end of the heat storage tank, the high temperature output end of the heat storage tank is a heat energy input end of which the heat supply end is connected to a heat supply loop of the absorption refrigerating unit, the output end of the heat supply loop of the absorption refrigerating unit is connected to the low temperature input end of the heat storage tank, and the low temperature input and output end of the heat storage tank is connected to the heat medium inlet end of the solar heat collection tube.
3. The solar heat collection combined phase-change energy storage high-efficiency refrigerating hot water central air conditioner according to claim 2, wherein: a heating system is also arranged; the high temperature output end of the heat storage tank is provided with a distribution valve, the input tank of the distribution valve is connected with the high temperature output end of the heat storage tank, one output end of the distribution valve is connected with the heat energy input end in the heat supply loop of the absorption refrigerating unit, the other input end of the distribution valve is connected with the input end of the heat supply system, and the output end of the heat supply system is connected to the low temperature input end of the heat storage tank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320734652.2U CN220379862U (en) | 2023-04-06 | 2023-04-06 | Solar heat collection combined phase-change energy storage efficient refrigerating and hot water central air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320734652.2U CN220379862U (en) | 2023-04-06 | 2023-04-06 | Solar heat collection combined phase-change energy storage efficient refrigerating and hot water central air conditioner |
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| CN220379862U true CN220379862U (en) | 2024-01-23 |
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