CN111082474A - Waste energy recycling technology based on micro-grid and water network - Google Patents
Waste energy recycling technology based on micro-grid and water network Download PDFInfo
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- CN111082474A CN111082474A CN201911342997.8A CN201911342997A CN111082474A CN 111082474 A CN111082474 A CN 111082474A CN 201911342997 A CN201911342997 A CN 201911342997A CN 111082474 A CN111082474 A CN 111082474A
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- energy
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- heat exchanger
- generator set
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J4/00—Circuit arrangements for mains or distribution networks not specified as ac or dc
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
- F24H7/02—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
- F24H7/0208—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid using electrical energy supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/085—Heat exchange elements made from metals or metal alloys from copper or copper alloys
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/50—Energy storage in industry with an added climate change mitigation effect
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention provides a waste energy recycling technology based on a micro-grid and a water network. The invention finishes the recycling of waste energy through a hybrid micro-grid, and the hybrid micro-grid comprises a power supply system and a heat energy recycling system. The power supply system supplies electric energy to the user, the heat energy recycling system recycles redundant electric energy generated by the power supply system, the electric energy is converted into heat energy, and hot water is supplied to the user. The invention can supply hot water for generator set production enterprises, avoids the current situation that hot water is supplied by coal-fired boilers for enterprises, reduces the energy consumption of fossil energy, fully uses the energy, and promotes the green energy conservation and the circular economy of factories.
Description
Technical Field
The invention belongs to the field of micro-grid and water network application and energy recycling, and particularly relates to a waste energy recycling technology based on a micro-grid and a water network.
Background
With the development of power electronic technology and the attention of new energy generator technology in various countries around the world, the theory of micro-grid is generated in the beginning of the 21 st century. Micro-grids have received attention from numerous national and regional scholars and research institutions as a new grid structure. The multi-energy complementary micro-grid is an energy system containing various energy forms, comprises various distributed energy supply and storage units, and can realize efficient supply of various load requirements. Compared with the traditional distributed energy system, the distributed energy system can realize comprehensive management and cascade utilization of energy.
In recent years, with the continuous and rapid increase of power demand, the consumption of fossil-based materials has been increasing, and the problems of energy crisis and environmental pollution have become more and more prominent. Therefore, the power generation resources are fully utilized, and the generated electric energy is used to the utmost extent, which is a potential scheme. At the present stage, in the process of performance test of the diesel engine, a means for effectively utilizing the generated redundant electric energy is lacked, and a feasible technology for recycling the waste electric energy and the heat energy in a combined manner is not available in the micro-grid.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a waste energy recycling technology based on a micro-grid and a water network. The invention provides a waste energy recycling technology which is based on the existing microgrid technology and integrates a heat energy recycling technology with a microgrid.
A technology for recycling waste energy based on a micro-grid and a water grid is characterized in that the waste energy is recycled through a hybrid micro-grid.
The hybrid microgrid comprises a power supply system and a heat energy recycling system. The power supply system comprises a direct current system, an alternating current system and a DC/AC converter, wherein the direct current system comprises a photovoltaic array, a direct current bus, a first DC/DC booster circuit, a second DC/DC booster circuit and a storage battery pack; the alternating current system comprises an alternating current bus, a first public connection point PCC, a second public connection point PCC, a third public connection point PCC, a boosting transformer, an alternating current network and a generator set.
One end of the photovoltaic array is connected with one end of a first DC/DC booster circuit, the other end of the first DC/DC converter is directly connected with a direct-current bus, the storage battery pack is bidirectionally connected with one end of a second DC/DC booster circuit, the other end of the second DC/DC booster circuit is bidirectionally connected with the direct-current bus, one end of the DC/AC converter is bidirectionally connected with the direct-current bus, the other end of the DC/AC converter is connected with a third public connection point PCC on the alternating-current bus, the first public connection point PCC on the alternating-current bus is connected with one end of a booster transformer, the other end of the booster transformer is connected with one end of an alternating-current network module, and the other end of the; and the first output end of the generator set is connected with a second common connection point PCC on the alternating current bus, and the second output end of the generator set is connected with a heat exchanger of the heat energy recycling system.
And the power is supplied to the user through the generator set, the photovoltaic array and the storage battery. The electric energy generated by the generator set is supplied to a power grid, and the redundant waste energy is supplied to a heat energy recycling system. When the generated energy of the photovoltaic array or the generator set is excessive, redundant electricity can be stored in the storage battery pack, and when the power supply of the generator set is insufficient or the generated electricity supply of the photovoltaic array is insufficient, the storage battery pack can supplement the generated electricity, so that a user can obtain sufficient electricity, and the effects of peak clipping and valley filling are achieved.
The heat energy recycling system is a heat transfer oil heat exchange system and comprises a first heat exchanger, a first flow pump/valve, a heat transfer copper pipe, a second heat exchanger and a second flow pump/valve.
The first heat exchanger is connected with the generator set, the output end of the first heat exchanger is connected with the second heat exchanger through a heat conduction copper pipe, the first flow pump/valve is installed in the heat conduction copper pipe, the heat conduction copper pipe is connected with the input end of the first heat exchanger after passing through the second heat exchanger, one end of the second flow pump/valve is connected with the second heat exchanger, and the other end of the second flow pump/valve is a cold water inflow interface.
The resistive load and the inductive load in the first heat exchanger convert alternating current input by the generator set into heat energy, the resistive load and the inductive load are completely immersed in the silicone oil pool of the first heat exchanger, and the heat energy generated by the resistive load and the inductive load is absorbed by utilizing the good heat conductivity and the fluidity of the high-temperature-resistant silicone oil to realize primary heat exchange; high-temperature silicon oil flows through the heat conduction copper pipe under the action of the first flow pump/valve and flows through a reservoir of the second heat exchanger, and cold circulating water in the reservoir cools the high-temperature silicon oil to realize second heat exchange; the cooled silicone oil flows into the silicone oil pool again and absorbs heat generated by the resistive load and the inductive load again; the circulation is repeated in this way, and the energy recovery and utilization are completed.
The invention has the following beneficial effects:
1. the electric heat storage technology provided by the invention can supply hot water for generator set production enterprises, avoids the current situation that hot water is supplied by coal-fired boilers for enterprises, reduces the energy consumption of fossil energy, enables the energy to be fully used, and promotes the green energy conservation and circular economy of factories.
2. The silicon oil with good heat conductivity is used for cooling the resistive load and the inductive load, so that the resistive load and the inductive load can be quickly recovered to the optimal working range, and the reactive power loss and the active power loss accuracy in the testing process of the generator set are improved.
Drawings
Fig. 1 is a schematic structural diagram of a hybrid microgrid according to the present invention.
FIG. 2 is a schematic view of a heat energy recycling module according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
A waste energy recycling technology based on a micro-grid and a water grid comprises a hybrid micro-grid and a heat energy recycling module.
As shown in fig. 1, a technology for recycling waste energy based on a microgrid and a water grid, which is implemented by using a hybrid microgrid.
The hybrid microgrid comprises a power supply system and a heat energy recycling system. The power supply system comprises a direct current system, an alternating current system and a DC/AC converter, wherein the direct current system comprises a photovoltaic array, a direct current bus, a first DC/DC booster circuit, a second DC/DC booster circuit and a storage battery pack; the alternating current system comprises an alternating current bus, a first public connection point PCC, a second public connection point PCC, a third public connection point PCC, a boosting transformer, an alternating current network and a generator set.
One end of the photovoltaic array is connected with one end of a first DC/DC booster circuit, the other end of the first DC/DC converter is directly connected with a direct-current bus, the storage battery pack is bidirectionally connected with one end of a second DC/DC booster circuit, the other end of the second DC/DC booster circuit is bidirectionally connected with the direct-current bus, one end of the DC/AC converter is bidirectionally connected with the direct-current bus, the other end of the DC/AC converter is connected with a third public connection point PCC on the alternating-current bus, the first public connection point PCC on the alternating-current bus is connected with one end of a booster transformer, the other end of the booster transformer is connected with one end of an alternating-current network module, and the other end of the; and the first output end of the generator set is connected with a second common connection point PCC on the alternating current bus, and the second output end of the generator set is connected with a heat exchanger of the heat energy recycling system.
And the power is supplied to the user through the generator set, the photovoltaic array and the storage battery. The electric energy generated by the generator set is supplied to a power grid, and the redundant waste energy is supplied to a heat energy recycling system. When the generated energy of the photovoltaic array or the generator set is excessive, redundant electricity can be stored in the storage battery pack, and when the power supply of the generator set is insufficient or the generated electricity supply of the photovoltaic array is insufficient, the storage battery pack can supplement the generated electricity, so that a user can obtain sufficient electricity, and the effects of peak clipping and valley filling are achieved.
The photovoltaic array is a green, environment-friendly and renewable novel power generation technology for directly converting solar energy into electric energy by the principle of generating a photovoltaic effect on the surface of a semiconductor material.
The storage battery pack is a lithium ion battery, and the lithium ion battery has the characteristics of high efficiency (up to more than 95%), high cycle frequency (up to 10000), high rated voltage (3.7V or 3.2V), good cycle performance, high effect speed, low self-discharge rate and high technology upgrading speed.
The generator set comprises an internal combustion engine and a generator, wherein the internal combustion engine generates mechanical energy and supplies the mechanical energy to the generator for generating electricity, and the generator is mechanical equipment for converting other forms of energy into electric energy. The internal combustion engine is a diesel engine or a generator, and chemical energy in fuel is converted into mechanical energy by pushing a piston in a cylinder to reciprocate after the fuel is combusted.
As shown in fig. 2, the heat energy recycling system is a heat transfer oil heat exchange system, and includes a first heat exchanger, a first flow pump/valve, a heat transfer copper pipe, a second heat exchanger, and a second flow pump/valve.
The first heat exchanger is connected with the generator set, the output end of the first heat exchanger is connected with the second heat exchanger through a heat conduction copper pipe, the first flow pump/valve is installed in the heat conduction copper pipe, the heat conduction copper pipe is connected with the input end of the first heat exchanger after passing through the second heat exchanger, one end of the second flow pump/valve is connected with the second heat exchanger, and the other end of the second flow pump/valve is a cold water inflow interface. The resistive load and the inductive load in the first heat exchanger convert alternating current input by the generator set into heat energy, the resistive load and the inductive load are completely immersed in the silicone oil pool of the first heat exchanger, and the heat energy generated by the resistive load and the inductive load is absorbed by utilizing the good heat conductivity and the fluidity of the high-temperature-resistant silicone oil to realize primary heat exchange; high-temperature silicon oil flows through the heat conduction copper pipe under the action of the first flow pump/valve and flows through a reservoir of the second heat exchanger, and cold circulating water in the reservoir cools the high-temperature silicon oil to realize second heat exchange; the cooled silicone oil flows into the silicone oil pool again and absorbs heat generated by the resistive load and the inductive load again; the circulation is repeated in this way, and the energy recovery and utilization are completed.
Resistive load means that the load is resistive (pure resistance), i.e. when the load current load voltage is not out of phase with the power supply. Inductive load refers to a load with inductive parameters.
The silicone oil used in the silicone oil storage tank has physiological inertia and good chemical stability. Can be used for a long time at the temperature of 50-180 ℃.
The heat conducting copper pipe is a common copper pipe, and has the characteristics of strong corrosion resistance, difficult oxidation, difficult chemical reaction with some liquid substances, and easy bright bending modeling.
The electric heat storage technology provided by the invention can supply hot water for generator set production enterprises, avoids the current situation that the enterprises supply hot water by using coal-fired boilers, reduces the energy consumption of fossil energy, and promotes the green energy conservation and the circular economy of factories. Meanwhile, the silicon oil with good thermal conductivity is used for cooling the resistive load and the inductive load, so that the resistive load and the inductive load can be quickly recovered to the optimal working range, and the reactive power loss and the active power loss accuracy in the test process of the generator set are improved.
Claims (1)
1. A technology for recycling waste energy based on a micro-grid and a water grid is characterized in that the waste energy is recycled through a hybrid micro-grid;
the hybrid microgrid comprises a power supply system and a heat energy recycling system; the power supply system comprises a direct current system, an alternating current system and a DC/AC converter, wherein the direct current system comprises a photovoltaic array, a direct current bus, a first DC/DC booster circuit, a second DC/DC booster circuit and a storage battery pack; the alternating current system comprises an alternating current bus, a first public connection point PCC, a second public connection point PCC, a third public connection point PCC, a boosting transformer, an alternating current network and a generator set;
one end of the photovoltaic array is connected with one end of a first DC/DC booster circuit, the other end of the first DC/DC converter is directly connected with a direct-current bus, the storage battery pack is bidirectionally connected with one end of a second DC/DC booster circuit, the other end of the second DC/DC booster circuit is bidirectionally connected with the direct-current bus, one end of the DC/AC converter is bidirectionally connected with the direct-current bus, the other end of the DC/AC converter is connected with a third public connection point PCC on the alternating-current bus, the first public connection point PCC on the alternating-current bus is connected with one end of a booster transformer, the other end of the booster transformer is connected with one end of an alternating-current network module, and the other end of the; the first output end of the generator set is connected with a second common connection point PCC on the alternating current bus, and the second output end of the generator set is connected with a heat exchanger of the heat energy recycling system;
the power is supplied to users through the generator set, the photovoltaic array and the storage battery; the electric energy generated by the generator set is supplied to a power grid, and the redundant waste energy is supplied to a heat energy recycling system; when the generated energy of the photovoltaic array or the generator set is excessive, redundant electricity can be stored in the storage battery pack, and when the power supply of the generator set is insufficient or the generated electricity supply of the photovoltaic array is insufficient, the storage battery pack can supplement the generated electricity, so that a user can obtain sufficient electricity, and the effects of peak clipping and valley filling are achieved;
the heat energy recycling system is a heat transfer oil heat exchange system and comprises a first heat exchanger, a first flow pump/valve, a heat transfer copper pipe, a second heat exchanger and a second flow pump/valve;
the first heat exchanger is connected with the generator set, the output end of the first heat exchanger is connected with the second heat exchanger through a heat conduction copper pipe, the first flow pump/valve is arranged in the heat conduction copper pipe, the heat conduction copper pipe is connected with the input end of the first heat exchanger after passing through the second heat exchanger, one end of the second flow pump/valve is connected with the second heat exchanger, and the other end of the second flow pump/valve is a cold water inflow interface;
the resistive load and the inductive load in the first heat exchanger convert alternating current input by the generator set into heat energy, the resistive load and the inductive load are completely immersed in the silicone oil pool of the first heat exchanger, and the heat energy generated by the resistive load and the inductive load is absorbed by utilizing the good heat conductivity and the fluidity of the high-temperature-resistant silicone oil to realize primary heat exchange; high-temperature silicon oil flows through the heat conduction copper pipe under the action of the first flow pump/valve and flows through a reservoir of the second heat exchanger, and cold circulating water in the reservoir cools the high-temperature silicon oil to realize second heat exchange; the cooled silicone oil flows into the silicone oil pool again and absorbs heat generated by the resistive load and the inductive load again; the circulation is repeated in this way, and the energy recovery and utilization are completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911342997.8A CN111082474A (en) | 2019-12-23 | 2019-12-23 | Waste energy recycling technology based on micro-grid and water network |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911342997.8A CN111082474A (en) | 2019-12-23 | 2019-12-23 | Waste energy recycling technology based on micro-grid and water network |
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| CN111082474A true CN111082474A (en) | 2020-04-28 |
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Citations (6)
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| CN203772087U (en) * | 2014-03-13 | 2014-08-13 | 北京工业大学 | Independent fused salt heat storage power plant |
| CN104716644A (en) * | 2015-03-09 | 2015-06-17 | 山东大学 | Renewable energy source cooling, heating and power microgrid system and control method |
| CN206099355U (en) * | 2016-10-21 | 2017-04-12 | 三峡大学 | Energy supply system is united to little electric wire netting cool and thermal power based on large -scale pasture |
| CN109084476A (en) * | 2018-08-08 | 2018-12-25 | 华电电力科学研究院有限公司 | A kind of conduction oil heat-exchange system and its working method |
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2019
- 2019-12-23 CN CN201911342997.8A patent/CN111082474A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2783340Y (en) * | 2005-01-04 | 2006-05-24 | 孝感市大禹电气有限公司 | Impedance load test controller for generator |
| CN102904281A (en) * | 2012-10-25 | 2013-01-30 | 同济大学 | Micro-grid system for ships |
| CN203772087U (en) * | 2014-03-13 | 2014-08-13 | 北京工业大学 | Independent fused salt heat storage power plant |
| CN104716644A (en) * | 2015-03-09 | 2015-06-17 | 山东大学 | Renewable energy source cooling, heating and power microgrid system and control method |
| CN206099355U (en) * | 2016-10-21 | 2017-04-12 | 三峡大学 | Energy supply system is united to little electric wire netting cool and thermal power based on large -scale pasture |
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Application publication date: 20200428 |