CN211780989U - Solar-assisted biogas cogeneration system utilizing heat pump - Google Patents
Solar-assisted biogas cogeneration system utilizing heat pump Download PDFInfo
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- CN211780989U CN211780989U CN201922008602.2U CN201922008602U CN211780989U CN 211780989 U CN211780989 U CN 211780989U CN 201922008602 U CN201922008602 U CN 201922008602U CN 211780989 U CN211780989 U CN 211780989U
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
Abstract
The utility model relates to a solar-assisted biogas cogeneration system using a heat pump, which belongs to the technical field of multi-energy complementation. The system mainly comprises energy conversion equipment such as an internal combustion engine, a waste heat boiler, a solar heat collector, an absorption heat pump and the like, and a heat conduction oil circulating system comprising a cold oil tank and a hot oil tank. Biogas is combusted in the internal combustion engine to release heat to drive the generator to generate electricity, the waste heat of the flue gas and the heat of the cylinder sleeve are recovered by heat conduction oil, and the auxiliary solar heat collector utilizes solar energy to heat part of the heat conduction oil. The heat pump uses the heat conduction oil as a driving heat source to supply heat to the outside, and the heat utilization rate of the system can be improved. The heat conduction oil in the whole system is provided by the cold oil tank, flows through the main equipment for heat exchange and then is collected to the hot oil tank, returns to the cold oil tank after the heat pump releases heat to form circulation, and the heat conduction oil transfers and collects heat, so that heat storage capacity is achieved to a certain extent, and the stability of external heat supply is guaranteed. The utility model discloses a can utilize solar energy and marsh gas coupling, realize the complementary high-efficient combined heat and power of multipotency.
Description
Technical Field
The utility model belongs to the technical field of the multipotency is complementary, in particular to utilize supplementary marsh gas combined heat and power generation system of solar energy of heat pump.
Background
At present, due to the problems of pollution, greenhouse gas emission and the like caused by excessive consumption of fossil fuel, and the storage of fossil energy is considered, China focuses on improving the energy of renewable energy in energy utilization, and utilizes the energy as efficiently as possible. The multi-energy complementary system is developed by the way that energy from various sources is reasonably configured in a certain area, the supply in different working environments meets the energy demand of users, renewable energy sources are advocated to be fully utilized, energy is complementarily utilized, and the maximization of the energy utilization rate of the system is finally pursued on the premise of stably supplying energy to the users.
In practical application, wind energy, solar energy, biomass and the like are all key development objects for renewable energy utilization. As a utilization mode of biomass renewable energy, biogas is usually converted by an internal combustion generator, but the efficiency of the internal combustion generator is not high, and is usually only 20% -40%; only a part of heat released by biogas combustion is converted into mechanical energy through an internal combustion engine, most of the heat mainly exists in the forms of exhaust smoke waste heat, cylinder sleeve waste heat and radiation waste heat of the engine to the surrounding environment, and the recycling of the waste heat determines the energy utilization efficiency of the biogas power generation system to a great extent.
In the aspect of solar energy utilization, because solar energy has the defects of low energy density, weather influence and the like, an energy supply system which only depends on the solar energy usually needs a huge solar energy collecting area, and an auxiliary energy system is usually needed. In recent years, the search for solar energy utilization is biased toward load systems that can indirectly and partially utilize solar energy for air conditioning, refrigeration, and the like, and the aim of reducing the consumption of conventional energy without excessively increasing the complexity and initial investment of the system is pursued.
The energy storage is an important functional area in a multi-energy complementary system, and the problem of unbalanced time and space of energy supply and demand can be solved, so that the energy utilization is more efficient. The heat conduction oil is used as one of heat storage modes, can realize the storage of heat at high and medium temperatures, and has a lot of applications in practice.
Disclosure of Invention
According to the requirement of the complementary system of multipotency that introduces in the technical background, characteristics that marsh gas electricity generation, solar energy utilized, the utility model discloses from the system of research multipotency source input, consider to improve system energy utilization, utilize system's energy more high-efficiently, introduce conduction oil circulation system, provide a solar energy assistance marsh gas combined heat and power generation system who utilizes the heat pump, involved marsh gas power generation technique, absorption heat pump technique, solar collector utilization technique and conduction oil circulation system, specific technical scheme is as follows:
a solar-assisted biogas cogeneration system using a heat pump comprises an energy conversion device part and a heat conduction oil circulating system; the energy conversion equipment comprises a generator, an internal combustion engine, a waste heat boiler, a solar heat collector and an absorption heat pump, and the internal combustion engine also comprises a cylinder sleeve cooler; the heat conducting oil circulating system comprises a cold oil tank and a hot oil tank.
The generator is dragged by the internal combustion engine, the inlet of the internal combustion engine is connected with the biogas supply pipeline, and the flue gas outlet pipeline is connected to the inlet of the flue gas channel of the waste heat boiler; the cylinder sleeve cooler of the internal combustion engine is connected with the cylinder sleeve cooling water inlet and outlet pipelines of the internal combustion engine and is provided with a heat-conducting oil inlet pipeline and a heat-conducting oil outlet pipeline; the heat conducting oil inlet pipeline of the cylinder sleeve cooler is connected with the outlet of the cold oil tank, and the heat conducting oil outlet pipeline of the cylinder sleeve cooler is connected with the inlet of the vacuum tube of the solar heat collector.
The waste heat boiler flue gas inlet is connected with a flue gas outlet pipeline of the internal combustion engine, and the waste heat boiler flue gas outlet is connected to a flue gas treatment device through a pipeline; a heat conduction oil inlet pipeline of the waste heat boiler is connected with an outlet of the cold oil tank, and a heat conduction oil outlet pipeline is connected with an inlet of the hot oil tank.
The inlet and outlet pipelines of the vacuum pipe of the solar heat collector are respectively connected with the heat-conducting oil outlet of the cylinder sleeve cooler and the inlet of the hot oil tank.
An outlet pipeline of the cold oil tank is divided into two paths and is respectively connected with a heat conduction oil inlet of the cylinder sleeve cooler and a vacuum tube inlet of the solar heat collector; an inlet of the hot oil tank is connected with a heat conduction oil outlet pipeline of the waste heat boiler and an outlet pipeline of a solar heat collector vacuum tube, and an outlet pipeline of the hot oil tank is connected with an inlet pipeline of the absorption heat pump generator; the outlet pipeline of the absorption heat pump generator is connected with the inlet of the cold oil tank.
An evaporator inlet of the absorption heat pump is connected with a ground buried pipe of a ground heat source, and an outlet pipeline of the ground buried pipe of the ground heat source is connected with an evaporator outlet of the absorption heat pump; the hot water outlet and inlet pipelines of the absorption heat pump are respectively connected with the inlet and outlet of the heat supply circulation pipeline of the heat consumer.
A cold oil tank, a hot oil tank and the like in the heat conduction oil circulating system are provided with a protective gas inlet pipeline and an exhaust valve pipeline, and the heat conduction oil system is also provided with temperature, pressure and liquid level controllers; and a pump for overcoming heat exchange flow resistance and driving heat transfer oil to flow is arranged on a pipeline of the heat transfer oil circulation system.
The beneficial effect of this system does:
the energy supply of the system is methane and solar energy, the methane is used for power generation, the tail smoke and the waste heat of the cylinder sleeve are recovered, the solar energy is used for heat utilization, the solar energy and the methane are used in a coupling mode, the total heat supply capacity of the system is enlarged, and the instability of the solar energy supply can be compensated to a certain extent by the methane supply.
The absorption heat pump used by the system is of a heating type, the energy conversion efficiency is greater than 1, the energy conversion efficiency of the whole system is improved, and efficient heat utilization is realized; the heat conduction oil is used as a heat transfer medium, so that the system has certain heat energy storage to a certain extent, and the stability of the heat pump heating system is ensured.
The main equipment of the heat conduction oil circulating system is controlled, the oil temperature and the oil pressure are controlled to fluctuate within an allowable range in real time, the flow of the heat conduction oil can be controlled as required, and the system has safety, reliability and flexibility; with the heat transfer oil circulation system, the possibility of equipment corrosion is low compared with that of water.
Drawings
Fig. 1 is a schematic diagram of a heat storage type energy supply system based on methane and solar energy utilization.
In the figure, 1-generator, 2-internal combustion engine, 3-exhaust-heat boiler, 4-cylinder liner cooler, 5-solar heat collector, 6-cold oil tank, 7-hot oil tank, 8-absorption heat pump.
Detailed Description
The utility model provides a solar-assisted biogas cogeneration system using a heat pump. The following description is made with reference to the accompanying drawings and examples.
As shown in fig. 1, in the solar-assisted biogas cogeneration system using a heat pump, a combustion engine 2 uses biogas as fuel, the fuel burns to convert chemical energy into heat energy, so as to push the combustion engine 2 to do work, and the combustion engine 2 drives a generator 1 to generate electricity; the flue gas discharged by the internal combustion engine 2 carries a large amount of waste heat, enters the waste heat boiler 3, releases heat and is discharged to the flue gas treatment device; the cylinder sleeve of the internal combustion engine 2 is cooled and waste heat is recovered by a cylinder sleeve cooler 4; in the cylinder liner cooler 4, heat transfer oil and cooling water of the cylinder liner of the internal combustion engine 2 exchange heat, and the heat of the cooling water of the cylinder liner of the internal combustion engine 2 is taken away by the heat transfer oil and then enters the internal combustion engine 2 for cooling; the heat conducting oil comes from the cold oil tank 6, absorbs heat emitted by cooling water of the cylinder sleeve and enters the solar heat collector 5.
The high-temperature flue gas entering the waste heat boiler 3 forms a radiation heating surface and simultaneously carries out convective flow heat exchange with the heat conduction oil in the interlayer; the volume of the heated temperature of the heat conduction oil is increased, and an expansion groove for compensating the volume change of the heat conduction oil is arranged in the waste heat boiler 3; the main devices of the heat conduction oil circulating system, namely the waste heat boiler 3, the cold oil tank 6 and the hot oil tank 7, are also provided with a protective gas inlet pipeline and an exhaust valve pipeline, and the protective gas inlet pipeline and the exhaust valve pipeline supply protective gas to all devices of the heat conduction oil system from a protective gas supply system; the heat conducting oil circulating system pipeline is matched with a corresponding pump, a liquid level controller, a pressure controller and a temperature controller to drive heat conducting oil to flow, and the liquid level, the pressure and the temperature of an inlet and an outlet are controlled to be within an allowable fluctuation range through monitoring.
The heat conducting oil forcibly flows in the solar heat collection 5 vacuum tube to absorb solar energy to raise the temperature, and then is converged into the hot oil tank 7; the heat conduction oil in the system is provided by a cold oil tank 6, part of the heat conduction oil reaches a certain temperature after absorbing heat in the waste heat boiler 3 and part of the heat conduction oil in the solar heat collector 5, and the heat conduction oil is collected into a hot oil tank 7, and the heat conduction oil in the hot oil tank 7 is connected to the generator inlet of an absorption heat pump 8 through a pipeline and serves as a driving heat source of the absorption heat pump 8; the low-temperature heat source of the absorption heat pump 8 adopts a geothermal source, the inlet of the evaporator of the absorption heat pump is connected with a ground buried pipe of the geothermal source, and the circulating working medium returns to the evaporator of the absorption heat pump 8 after absorbing heat by the ground buried pipe of the geothermal source and circularly flows; a ground source pump is arranged in a circulation loop formed by the evaporator of the absorption heat pump 8 and a ground buried pipe of a ground heat source, and working media in the forced circulation pipe are arranged; the hot water outlet of the absorption heat pump 8 is connected with the inlet of the heat user heat supply circulation pipeline, and the hot water returns to the hot water return pipeline of the absorption heat pump 8 through the outlet of the heat user heat supply circulation pipeline after heat is supplied to the heat user.
The above embodiments are only used for illustrating the present invention, wherein the structure, connection mode, method steps and the like of each component can be changed, and all the equivalent transformation and improvement performed on the basis of the technical solution of the present invention should not be excluded from the protection scope of the present invention.
Claims (7)
1. A solar-assisted biogas cogeneration system using a heat pump is characterized in that: comprises an energy conversion device part and a heat conduction oil circulating system; the energy conversion equipment comprises a generator (1), an internal combustion engine (2), a waste heat boiler (3), a solar heat collector (5) and an absorption heat pump (8), wherein the internal combustion engine (2) also comprises a cylinder liner cooler (4); the heat conduction oil circulating system comprises a cold oil tank (6) and a hot oil tank (7).
2. The solar-assisted biogas cogeneration system using a heat pump according to claim 1, wherein: the generator (1) is dragged by the internal combustion engine (2), the inlet of the internal combustion engine (2) is connected with a biogas supply pipeline, and the flue gas outlet pipeline is connected to the inlet of a flue gas channel of the waste heat boiler (3); a cylinder sleeve cooler (4) of the internal combustion engine (2) is connected with a cylinder sleeve cooling water inlet pipeline and a cylinder sleeve cooling water outlet pipeline of the internal combustion engine (2), and is provided with a heat conduction oil inlet pipeline and a heat conduction oil outlet pipeline; and a heat conduction oil inlet pipeline of the cylinder sleeve cooler (4) is connected with an outlet of the cold oil tank (6), and a heat conduction oil outlet pipeline of the cylinder sleeve cooler is connected with an inlet of a vacuum tube of the solar heat collector (5).
3. The solar-assisted biogas cogeneration system using a heat pump according to claim 1, wherein: a flue gas inlet of the waste heat boiler (3) is connected with a flue gas outlet pipeline of the internal combustion engine (2), and a flue gas outlet of the waste heat boiler (3) is connected to a flue gas treatment device through a pipeline; a heat conduction oil inlet pipeline of the waste heat boiler (3) is connected with an outlet of the cold oil tank (6), and a heat conduction oil outlet pipeline is connected with an inlet of the hot oil tank (7).
4. The solar-assisted biogas cogeneration system using a heat pump according to claim 1, wherein: the inlet and outlet pipelines of the vacuum pipe of the solar heat collector (5) are respectively connected with the heat conducting oil outlet of the cylinder sleeve cooler (4) and the inlet of the hot oil tank (7).
5. The solar-assisted biogas cogeneration system using a heat pump according to claim 1, wherein: an outlet pipeline of the cold oil tank (6) is divided into two paths and is respectively connected with a heat conduction oil inlet of the cylinder sleeve cooler (4) and a vacuum tube inlet of the solar heat collector (5); an inlet of the hot oil tank (7) is connected with a heat conduction oil outlet pipeline of the waste heat boiler (3) and an outlet pipeline of a vacuum pipe of the solar heat collector (5), and an outlet pipeline of the hot oil tank (7) is connected with an inlet pipeline of a generator of the absorption heat pump (8); the generator outlet pipeline of the absorption heat pump (8) is connected with the inlet of the cold oil tank (6).
6. The solar-assisted biogas cogeneration system using a heat pump according to claim 1, wherein: an evaporator inlet of the absorption heat pump (8) is connected with a ground buried pipe of a ground heat source, and an outlet pipeline of the ground buried pipe of the ground heat source is connected with an evaporator outlet of the absorption heat pump (8); the hot water outlet and inlet pipelines of the absorption heat pump (8) are respectively connected with the inlet and outlet of the heat supply circulation pipeline of the heat user.
7. The solar-assisted biogas cogeneration system using a heat pump according to claim 1, wherein: a cold oil tank (6) and a hot oil tank (7) in the heat conduction oil circulating system are provided with a protective gas inlet pipeline and an exhaust valve pipeline, and the heat conduction oil system is also provided with temperature, pressure and liquid level controllers; and a pump for overcoming heat exchange flow resistance and driving heat transfer oil to flow is arranged on a pipeline of the heat transfer oil circulation system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922008602.2U CN211780989U (en) | 2019-11-20 | 2019-11-20 | Solar-assisted biogas cogeneration system utilizing heat pump |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922008602.2U CN211780989U (en) | 2019-11-20 | 2019-11-20 | Solar-assisted biogas cogeneration system utilizing heat pump |
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| CN211780989U true CN211780989U (en) | 2020-10-27 |
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| CN201922008602.2U Expired - Fee Related CN211780989U (en) | 2019-11-20 | 2019-11-20 | Solar-assisted biogas cogeneration system utilizing heat pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115111632A (en) * | 2022-06-21 | 2022-09-27 | 北方联合电力有限责任公司呼和浩特金桥热电厂 | Combined heat and power supply system and method for coupling internal combustion engine with solar geothermal energy |
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2019
- 2019-11-20 CN CN201922008602.2U patent/CN211780989U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115111632A (en) * | 2022-06-21 | 2022-09-27 | 北方联合电力有限责任公司呼和浩特金桥热电厂 | Combined heat and power supply system and method for coupling internal combustion engine with solar geothermal energy |
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Granted publication date: 20201027 Termination date: 20211120 |