CN212619658U - Gas combined cooling heating and power supply distributed energy system - Google Patents
Gas combined cooling heating and power supply distributed energy system Download PDFInfo
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- CN212619658U CN212619658U CN202021315472.3U CN202021315472U CN212619658U CN 212619658 U CN212619658 U CN 212619658U CN 202021315472 U CN202021315472 U CN 202021315472U CN 212619658 U CN212619658 U CN 212619658U
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Abstract
The utility model relates to a gas cooling, heating and power trigeminy supplies distributed energy system, including gas engine, first generator, heat pump, heat exchanger module, heat load end, cold load end, the heat engine of flue gas waste heat drive, second generator and electric power load end, the gas engine connects first generator or heat pump through the switchable connecting module, the heat pump connects heat load end and cold load end respectively; a cylinder sleeve water outlet pipeline of the gas engine is connected with a heat exchanger module, and the heat exchanger module is connected with a heat load end; the smoke exhaust pipeline of the gas engine is respectively connected with the heat exchanger module and the heat engine through the three-way pipe, and the heat engine is connected with the power load end through the second generator. Compared with the prior art, the utility model discloses can adjust generated energy, heating capacity, refrigerating capacity in a flexible way, adapt to cold, heat, the electric load change under the various seasons, strengthen the adaptability to user's load, guarantee that the system moves under the high efficiency all the year round.
Description
Technical Field
The utility model belongs to the technical field of the energy utilization technique and specifically relates to a gas cooling, heating and power trigeminy supplies distributed energy system is related to.
Background
The gas engine heat pump generally adopts natural gas as primary energy input to provide cold and hot loads for buildings, and has the advantages of safety, reliability, energy conservation, environmental protection and the like. Wherein, the waste heat that gas engine produced can be used for supplementary heat supply or cooling service usually, improves its efficiency of energy use. But the practical use shows that: due to seasons, particularly geographical areas with large four-season changes, in transition seasons (spring and autumn), the demand of users for heat pumps is reduced, so that the direct utilization rate of the heat pumps of the gas engine is reduced or the thermoelectric comprehensive efficiency of the gas generator set is reduced due to insufficient utilization of flue gas waste heat, the system is in a low utilization rate state for a long time, and the normal operation and the service life of the system are influenced. Meanwhile, a large amount of energy is wasted, and the use efficiency is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a gas cooling, heating and power trigeminy supplies distributed energy system in order to overcome the defect that above-mentioned prior art exists.
The purpose of the utility model can be realized through the following technical scheme:
a gas combined cooling heating and power distributed energy system comprises a gas engine, a first generator, a heat pump, a heat exchanger module, a heat load end, a cold load end, a heat engine driven by waste heat of flue gas, a second generator and an electric power load end, wherein the gas engine is connected with the first generator or the heat pump through a switchable connection module, and the heat pump is respectively connected with the heat load end and the cold load end; a cylinder sleeve water outlet pipeline of the gas engine is connected with a heat exchanger module, a first valve is arranged on the cylinder sleeve water outlet pipeline, and the heat exchanger module is connected with a heat load end; the smoke exhaust pipeline of the gas engine is respectively connected with the heat exchanger module and the heat engine driven by the waste heat of the smoke gas through a three-way pipe, a second valve and a third valve are respectively arranged on the inlet pipelines of the heat exchanger module and the heat engine, and the heat engine driven by the waste heat of the smoke gas is connected with the electric load end through a second generator.
Further, the heat exchanger module comprises a first heat exchanger and a second heat exchanger, the first heat exchanger is connected with the cylinder sleeve water outlet pipeline, and the second heat exchanger is connected with the three-way pipe.
Furthermore, one end of the first heat exchanger is connected with a cylinder sleeve water outlet pipeline, and the second heat exchanger is respectively connected with the first heat exchanger, the three-way pipe and the heat load end.
Furthermore, one end of the first heat exchanger is connected with a cylinder sleeve water outlet pipeline, and the other end of the first heat exchanger is connected with a heat load end; one end of the second heat exchanger is connected with the three-way pipe, and the other end of the second heat exchanger is connected with the heat load end.
Further, the heat engine driven by the waste heat of the flue gas is an Ericsson cycle heat engine.
Further, the gas-fired boiler also comprises a natural gas conveying pipe and a gas-fired boiler which are connected with each other, wherein the natural gas conveying pipe is connected with a gas engine, and the gas-fired boiler is connected with a heat load end.
Furthermore, the system also comprises a power supply network and an electric refrigerator which are connected with each other, wherein the electric refrigerator is connected with a cold load end, and the power supply network end is connected with an electric load end to supply power to each device.
Further, the first valve, the second valve and the third valve are all electric valves.
Furthermore, heat insulation layers are wrapped outside a cylinder sleeve water outlet pipeline and a smoke exhaust pipeline of the gas engine.
Furthermore, the heat-insulating layer is made of porous heat-insulating materials.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model realizes bidirectional driving by selectively connecting the gas engine with the first generator or the heat pump; meanwhile, a heat engine and a second generator driven by the waste heat of the flue gas are utilized for power generation, or the waste heat of the flue gas is utilized for heat supply assistance. In summer and winter, the gas engine mainly drives the heat pump to operate, provide cold and heat loads, and utilize the waste heat of the flue gas to carry on the auxiliary power generation or is used for the heat load to supply; in spring and autumn (transition season), the gas engine mainly drives the first generator to generate electricity, and uses waste heat for auxiliary heat load supply or for electricity generation. Therefore, the utility model discloses a system architecture can adjust generated energy, heating capacity, refrigerating capacity in a flexible way, adapts to user's cold, hot, electric load change under the various seasons, has strengthened the adaptability to user's load, guarantees that gas engine and overall system move under the high efficiency all the year round.
2. The heat exchanger module adopts the mode that two heat exchangers are connected in parallel or in series, and can improve the heat exchange efficiency of the heat exchangers.
3. The heat engine driven by the flue gas waste heat is an Ericsson cycle (Ericsson cycle) heat engine, the utilization rate of the high-temperature flue gas waste heat is high, and the energy loss is reduced.
4. The utility model discloses still be equipped with lug connection's natural gas conveying pipe and gas boiler to and power supply network and electric refrigerator can enough regard as the redundancy of system, can provide supplementary generated energy, heating capacity, refrigerating output supply again, improve the security and the stability of whole operation.
5. The heat-insulating layers are wrapped outside the water outlet pipeline and the smoke exhaust pipeline of the cylinder sleeve, so that the waste heat loss is reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Reference numerals: 1. the gas engine, 2, the first generator, 3, the heat pump, 4, the heat exchanger module, 41, the first heat exchanger, 42, the second heat exchanger, 5, the heat load end, 6, the cold load end, 7, the heat engine, 8, the second generator, 9, the electric load end, 10, the natural gas conveying pipe, 11, the gas boiler, 12, the power supply network, 13, the electric refrigerator, 14, the first valve, 15, the second valve, 16, the third valve, 17, the three-way pipe.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1, the present embodiment provides a gas combined cooling heating and power distributed energy system, which is used in a large hospital building in a certain area of china. The energy system comprises a gas engine 1, a first generator 2, a heat pump 3, a heat exchanger module 4, a heat load end 5 (heating equipment in a building), a cold load end 6 (air conditioning equipment in the building), a heat engine 7 driven by waste heat of flue gas, a second generator 8 and an electric load end 9 (an electric power system in the building). The gas engine 1 is connected with the first generator 2 or the heat pump 3 through the switchable connection module, and the switchable connection module can adopt a commercially available gear box group to enable an output shaft of the gas engine 1 to be connected with the first generator 2 or the heat pump 3, so that output switching is realized. The heat pump 3 is respectively connected with a heat load end 5 and a cold load end 6, and the heat exchanger module 4 is connected with the heat load end 5. The smoke exhaust pipeline of the gas engine 1 is respectively connected with the heat exchanger module 4 and the heat engine 7 driven by the waste heat of the smoke through a three-way pipe 17, and a second valve 15 and a third valve 16 are respectively arranged at the connecting ports of the heat exchanger module 4 and the heat engine 7 driven by the waste heat of the smoke. The heat engine 7 driven by the waste heat of the flue gas is connected with an electric load end 9 through a second generator 8.
In this embodiment, the heat exchanger module 4 includes a first heat exchanger 41 and a second heat exchanger 42, the first heat exchanger 41 exchanges heat by using the cylinder liner water waste heat of the gas engine 1, and the second heat exchanger 42 exchanges heat by using the high-temperature flue gas waste heat of the gas engine 1. Specifically, the method comprises the following steps: the first heat exchanger 41 and the second heat exchanger 42 are connected in series, one end of the first heat exchanger 41 is connected with a cylinder sleeve water outlet pipeline, and the second heat exchanger 42 is respectively connected with the first heat exchanger 41, the three-way pipe 17 and the heat load end 5. The first heat exchanger 41 realizes low-level preheating of the supplied hot water because the residual heat of the cylinder liner water is relatively reduced, then the hot water enters the second heat exchanger 42 and further heated by high-temperature flue gas to reach a set temperature, the residual heat of the flue gas is fully utilized to supply heat load and generate power, and the energy utilization rate is improved.
In another embodiment, the first heat exchanger 41 and the second heat exchanger 42 may also be connected in parallel with each other: one end of the first heat exchanger 41 is connected with the cylinder liner water outlet pipeline, and the other end is connected with the heat load end 5. One end of the second heat exchanger 42 is connected with the tee pipe 17, and the other end is connected with the heat load end 5.
The heat engine 7 driven by the flue gas waste heat in the embodiment can be a rankine cycle, a kalina cycle and the like, and the existing heat engine 7 adopting an Ericsson cycle is preferably adopted. The first valve 14, the second valve 15 and the third valve 16 are all electric valves, which are convenient for control and switching. The heat preservation layers are wrapped outside a cylinder sleeve water outlet pipeline and a smoke exhaust pipeline of the gas engine 1 and are used for reducing waste heat loss. The heat-insulating layer can adopt a porous heat-insulating material sold in the market.
The present embodiment further includes a natural gas delivery pipe 10 and a gas boiler 11 connected to each other, and a power supply network 12 and an electric refrigerator 13 connected to each other, which can be used as redundancy of the system, and can provide auxiliary power generation, heating and cooling capacity supply, thereby improving the safety and stability of the overall operation. The specific connection structure is that a natural gas conveying pipe 10 is connected with a gas engine 1, a gas boiler 11 is connected with a heat load end 5, an electric refrigerator is connected with a cold load end 6, and a power supply network 12 end is connected with a power load end 9.
The working principle of the embodiment is as follows:
when the gas engine is used in spring and autumn (transition season), the gas engine 1 is connected with and drives the first generator 2 to generate electricity, and meanwhile, the flue gas waste heat of the gas engine 1 can be selectively used for auxiliary power supply or heat supply through the arrangement of the valve. When the power is supplied by the residual heat of the flue gas, the third valve 16 is opened, and the first valve 14 and the second valve 15 are closed; when the smoke waste heat is used for auxiliary heat supply, the third valve 16 is closed, and the first valve 14 and the second valve 15 are opened; when the smoke waste heat carries out waste heat power generation and heat supply at the same time, the first valve 14, the second valve 15 and the third valve 16 are opened, and the three valves are opened to a certain position according to the load of a user.
When the gas engine is used in summer and winter, the gas engine 1 mainly drives the heat pump 3 to operate to provide cold and hot loads, and meanwhile, waste heat power generation is carried out or heat load supply is carried out through the waste heat of the flue gas of the gas engine 1.
(1) In summer, the electric refrigerator 13 operates to perform auxiliary cooling. The first valve 14 and the second valve 15 are closed, the third valve 16 is opened, and the flue gas waste heat drives the second generator 8 to generate electricity by waste heat through the heat engine 7 driven by the Elson flue gas waste heat; the first valve 14 and the second valve 15 are opened, the third valve 16 is closed, and the waste heat of the flue gas carries out auxiliary heat supply on the heat load end 5 through the heat exchanger module 4; or the first valve 14, the second valve 15 and the third valve 16 are opened, and the waste heat of the flue gas generates electricity and supplies heat at the same time.
(2) In winter, the gas boiler 11 performs auxiliary heating; the first valve 14 and the second valve 15 are opened, the third valve 16 is closed, and the waste heat of the flue gas carries out auxiliary heat supply on the heat load end 5 through the heat exchanger module 4; or the first valve 14, the second valve 15 and the third valve 16 are opened, and the smoke waste heat simultaneously assists power generation and heat supply.
To sum up, the utility model discloses a system architecture can adjust generated energy, heating capacity, refrigeration capacity in a flexible way, adapts to cold, heat, the electric load change under the various seasons, has strengthened the adaptability to user's load, guarantees that gas engine 1 and overall system move under the high efficiency all the year round.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A gas combined cooling heating and power distributed energy system is characterized by comprising a gas engine (1), a first generator (2), a heat pump (3), a heat exchanger module (4), a heat load end (5), a cold load end (6), a heat engine (7) driven by waste heat of flue gas, a second generator (8) and an electric power load end (9), wherein the gas engine (1) is connected with the first generator (2) or the heat pump (3) through a switchable connecting module, and the heat pump (3) is respectively connected with the heat load end (5) and the cold load end (6); a cylinder sleeve water outlet pipeline of the gas engine (1) is connected with a heat exchanger module (4), a first valve (14) is arranged on the cylinder sleeve water outlet pipeline, and the heat exchanger module (4) is connected with a heat load end (5); the gas engine is characterized in that a smoke exhaust pipeline of the gas engine (1) is respectively connected with the heat exchanger module (4) and the heat engine (7) driven by the waste heat of the smoke gas through a three-way pipe (17), a second valve (15) and a third valve (16) are respectively arranged on inlet pipelines of the heat exchanger module (4) and the heat engine (7) driven by the waste heat of the smoke gas, and the heat engine (7) driven by the waste heat of the smoke gas is connected with an electric load end (9) through a second generator (8).
2. The gas combined cooling heating and power distributed energy system as claimed in claim 1, wherein the heat exchanger module (4) comprises a first heat exchanger (41) and a second heat exchanger (42), the first heat exchanger (41) is connected with a cylinder liner water outlet pipeline, and the second heat exchanger (42) is connected with the tee pipe (17).
3. The gas combined cooling heating and power distributed energy system as claimed in claim 2, wherein one end of the first heat exchanger (41) is connected with a cylinder liner water outlet pipeline, and the second heat exchanger (42) is respectively connected with the first heat exchanger (41), the three-way pipe (17) and the heat load end (5).
4. The gas combined cooling heating and power distributed energy system as claimed in claim 2, wherein one end of the first heat exchanger (41) is connected with a cylinder liner water outlet pipeline, and the other end is connected with a heat load end (5); one end of the second heat exchanger (42) is connected with the three-way pipe (17), and the other end is connected with the heat load end (5).
5. The combined cooling, heating and power gas distributed energy system according to claim 1, wherein the heat engine (7) driven by the waste heat of flue gas is an Ericsson cycle heat engine.
6. The combined cooling, heating and power gas distributed energy system as claimed in claim 1, further comprising a natural gas delivery pipe (10) and a gas boiler (11) connected with each other, wherein the natural gas delivery pipe (10) is connected with the gas engine (1), and the gas boiler (11) is connected with the heat load end (5).
7. The gas combined cooling heating and power distributed energy system according to claim 1, further comprising an electric power supply network (12) and an electric refrigerator (13) connected with each other, wherein the electric refrigerator (13) is connected with the cold load terminal (6), and the electric power supply network (12) terminal is connected with the electric load terminal (9).
8. The combined cooling, heating and power gas distributed energy system according to claim 1, wherein the first valve (14), the second valve (15) and the third valve (16) are all electrically operated valves.
9. The gas combined cooling heating and power distributed energy system as claimed in claim 1, wherein the cylinder liner water outlet pipeline and the smoke exhaust pipeline of the gas engine (1) are wrapped with insulating layers.
10. The gas combined cooling heating and power distributed energy system according to claim 9, wherein the heat-insulating layer is made of porous heat-insulating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021315472.3U CN212619658U (en) | 2020-07-07 | 2020-07-07 | Gas combined cooling heating and power supply distributed energy system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021315472.3U CN212619658U (en) | 2020-07-07 | 2020-07-07 | Gas combined cooling heating and power supply distributed energy system |
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| Publication Number | Publication Date |
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| CN212619658U true CN212619658U (en) | 2021-02-26 |
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| CN202021315472.3U Active CN212619658U (en) | 2020-07-07 | 2020-07-07 | Gas combined cooling heating and power supply distributed energy system |
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