CN214745995U - Gas internal combustion generator and heat pump-based thermoelectric combined heating system - Google Patents
Gas internal combustion generator and heat pump-based thermoelectric combined heating system Download PDFInfo
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- CN214745995U CN214745995U CN202120875966.5U CN202120875966U CN214745995U CN 214745995 U CN214745995 U CN 214745995U CN 202120875966 U CN202120875966 U CN 202120875966U CN 214745995 U CN214745995 U CN 214745995U
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Abstract
The utility model discloses a combined heat and power heating system based on a gas internal combustion generator and a heat pump, which comprises a gas internal combustion generator, wherein a first heat exchanger, a second heat exchanger and an air source heat pump are sequentially arranged on a flue gas discharge pipeline of the gas internal combustion generator, and a cylinder sleeve cooling pipeline of the gas internal combustion generator is connected with a fourth heat exchanger; the air source heat pump comprises a third heat exchanger, a transfer heat exchanger and a sixth heat exchanger; the return water of the heating system returns to a water supply pipeline of the heating system through the sixth heat exchanger, the second heat exchanger, the fourth heat exchanger and the first heat exchanger in sequence; the electricity generated by the gas internal combustion generator is directly supplied to an air source heat pump for use, and the heat in the heating backwater absorption system is heated to 100 ℃ and then returns to a water supply pipeline of a heating system for circulating heating; high heat recovery rate and energy saving.
Description
Technical Field
The utility model relates to a combined heat and power heating system especially relates to a combined heat and power heating system based on gas internal combustion generator and heat pump that can make full use of internal combustion generator waste heat.
Background
The gas internal combustion engine is a new generation power generation device utilizing clean energy, can efficiently and cleanly convert gas fuels such as natural gas, hydrogen, synthesis gas, purge gas and the like or liquid fuels such as fuel oil and the like into electric power, steam, hot water and the like, and is a large-scale heat power conversion device with the highest efficiency at present.
The gas internal combustion engine is widely applied to cogeneration, and provides power, steam, heating and the like for energy users. In a gas turbine cogeneration system, clean fuel gas is converted into electric power through a gas internal combustion engine, the exhaust of the gas internal combustion engine is flue gas with higher temperature, steam and/or hot water is generally generated through a waste heat boiler, and the steam can be used for a turbonator to do work and generate power and can also be directly supplied to users of industrial steam; the residual heat of cylinder liner water at 80 ℃ and the residual heat of cooling oil at about 40 ℃ of the gas internal combustion generator are used for producing domestic hot water or supplying heat.
The exhaust gas temperature of a waste heat boiler generally matched with a gas internal combustion engine can be reduced to 80 ℃ or even lower, and people continuously research how to further utilize the exhaust gas heat of the waste heat boiler, especially how to fully recycle the heat of low-temperature flue gas for heating in order to further improve the energy utilization efficiency.
The gas internal combustion engine is used for directly heating, about 60% of waste heat can be used for generating steam and hot water for heating, and electricity is a byproduct of heating; the energy utilization rate is limited. The air source heat pump is used for heating only, when the air temperature is low or the heating water temperature is high, the energy efficiency ratio of the air source heat pump is very low, and even the condition that the air source heat pump cannot work can occur, so that the normal use is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a complementary thermoelectricity combined heating system based on gas internal combustion generator and heat pump of air source heat pump and gas internal combustion generator advantage is provided.
In order to solve the technical problem, the technical scheme of the utility model is that: the combined heat and power heating system based on the gas internal combustion generator and the heat pump comprises the gas internal combustion generator, wherein a first heat exchanger, a second heat exchanger and an air source heat pump are sequentially installed on a flue gas discharge pipeline of the gas internal combustion generator, and the air source heat pump is connected with a water return pipeline of the heating system; a cylinder sleeve cooling pipeline of the gas internal combustion engine generator is connected with a fourth heat exchanger;
the air source heat pump comprises a third heat exchanger connected with the smoke discharge pipeline, the third heat exchanger is connected with a transfer heat exchanger, the transfer heat exchanger is connected with a sixth heat exchanger, the sixth heat exchanger is connected with the water return pipeline of the heating system, and a water storage tank is arranged on a water return pipeline between the sixth heat exchanger and the transfer heat exchanger and flowing to the sixth heat exchanger;
the water return pipeline sequentially passes through the sixth heat exchanger, the second heat exchanger, the fourth heat exchanger and the first heat exchanger and returns to a water supply pipeline of the heating system; and the power supply end of the air source heat pump is connected with the electric energy output end of the gas internal combustion generator.
As a preferred technical scheme, a cooling oil pipeline of the gas internal combustion generator is connected with a water source heat pump, and the water source heat pump is connected with a fifth heat exchanger; the fifth heat exchanger is connected with the water return pipeline and is positioned between the sixth heat exchanger and the second heat exchanger; and the power supply end of the water source heat pump is connected with the electric energy output end of the gas internal combustion generator.
As a preferable technical scheme, a cylinder sleeve cooling pipeline of the gas internal combustion engine generator is further connected with a first radiator.
As a preferred technical solution, a second radiator is connected to a cooling oil pipeline of the gas internal combustion engine generator.
As a preferable technical solution, the third heat exchanger of the air source heat pump includes a V-shaped heat absorption plate, the flue gas discharge pipe is disposed below the V-shaped heat absorption plate, a flue gas nozzle facing the V-shaped heat absorption plate is disposed on the flue gas discharge pipe, and a condensation drain outlet is disposed on the flue gas discharge pipe.
As a preferable technical scheme, the high-temperature flue gas with the temperature of 480-520 ℃ generated by the gas internal combustion generator is reduced to 28-32 ℃ through the first heat exchanger, the second heat exchanger and the third heat exchanger.
As a preferable technical scheme, the temperature of the return water of the heating system is increased to 65-75 ℃ after passing through the sixth heat exchanger, the fifth heat exchanger and the second heat exchanger, and the temperature of the return water of the heating system is increased to 100 ℃ after passing through the fourth heat exchanger and the first heat exchanger, and then the return water returns to the heating system.
As a preferred technical scheme, the outer wall of the flue gas discharge pipeline is provided with a heat insulation material.
Due to the adoption of the technical scheme, the heat and power combined heating system based on the gas internal combustion generator and the heat pump comprises the gas internal combustion generator, wherein a first heat exchanger, a second heat exchanger and an air source heat pump are sequentially arranged on a flue gas discharge pipeline of the gas internal combustion generator, and the air source heat pump is connected with a water return pipeline of the heating system; a cylinder sleeve cooling pipeline of the gas internal combustion engine generator is connected with a fourth heat exchanger; the air source heat pump comprises a third heat exchanger connected with the smoke discharge pipeline, the third heat exchanger is connected with a transfer heat exchanger, the transfer heat exchanger is connected with a sixth heat exchanger, the sixth heat exchanger is connected with the water return pipeline of the heating system, and a water storage tank is arranged on a water return pipeline between the sixth heat exchanger and the transfer heat exchanger and flowing to the sixth heat exchanger; the water return pipeline sequentially passes through the sixth heat exchanger, the second heat exchanger, the fourth heat exchanger and the first heat exchanger and returns to a water supply pipeline of the heating system; the power supply end of the air source heat pump is connected with the electric energy output end of the gas internal combustion generator; the electricity generated by the gas internal combustion engine generator is directly supplied to an air source heat pump for use, the low-temperature backwater of the heating system absorbs the heat in the air and the heat at the tail part of the smoke discharge pipeline through the air source heat pump, absorbs the heat at the middle part of the smoke discharge pipeline through a second heat exchanger, then the temperature reaches about 70 ℃, then the heat of a cylinder sleeve cooling pipeline is absorbed through a fourth heat exchanger, the heat of the high-temperature smoke directly discharged by the gas internal combustion engine generator is absorbed through a first heat exchanger, then the temperature reaches 100 ℃, and the 100 ℃ backwater enters a water supply pipeline of the heating system for circulating heating; the heating backwater recycles the waste heat generated by the gas internal combustion generator through the multistage heating device, the heat recovery rate is high, and the energy is saved.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of the connection between the air source heat pump and the flue gas discharge pipe according to the embodiment of the present invention;
in the figure: 1-a gas internal combustion generator; 21-a first heat exchanger; 22-a second heat exchanger; 23-a third heat exchanger; 24-a fourth heat exchanger; 31-water source heat pump; 32-a fifth heat exchanger; 41-air source heat pump; 42-a sixth heat exchanger; a 43-V shaped heat sink plate; 44-a flue gas discharge duct; 45-smoke spraying holes; 46-condensation drain; 47-a water storage tank; 48-a transit heat exchanger; 5-a first heat sink; 6-second radiator.
Detailed Description
The invention is further explained below with reference to the drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention have been described by way of illustration only. Needless to say, a person skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
As shown in fig. 1, the combined heating system based on a gas internal combustion generator and a heat pump comprises a gas internal combustion generator 1, wherein a first heat exchanger 21, a second heat exchanger 22 and an air source heat pump 41 are sequentially installed on a flue gas discharge pipeline 44 of the gas internal combustion generator 1, and the air source heat pump 41 is connected with a water return pipeline of a heating system; a cylinder sleeve cooling pipeline of the gas internal combustion generator 1 is connected with a fourth heat exchanger 24; the air source heat pump 41 comprises a third heat exchanger 23 connected with the flue gas discharge pipeline 44, the third heat exchanger 23 is connected with a transit heat exchanger 48, the transit heat exchanger 48 is connected with a sixth heat exchanger 42, the sixth heat exchanger 42 is connected with the water return pipeline of the heating system, and a water storage tank 47 is arranged between the sixth heat exchanger 42 and the transit heat exchanger 48 and on the water return pipeline flowing to the sixth heat exchanger 42; the water return pipeline sequentially passes through the sixth heat exchanger 42, the second heat exchanger 22, the fourth heat exchanger 24 and the first heat exchanger 21 and returns to a water supply pipeline of the heating system; the power end of the air source heat pump 41 is connected with the electric energy output end of the gas internal combustion generator 1. The outer wall of the flue gas discharge pipeline 44 is provided with a heat insulation material, so that heat of flue gas is prevented from dissipating in the air through the flue gas discharge pipeline 44, heat of most flue gas is guaranteed to be used for heat exchange of each stage, and energy waste is prevented.
A cooling oil pipeline of the gas internal combustion generator 1 is connected with a water source heat pump 31, and the water source heat pump 31 is connected with a fifth heat exchanger 32; the fifth heat exchanger 32 is connected with the water return pipeline and is positioned between the sixth heat exchanger 42 and the second heat exchanger 22; the power end of the water source heat pump 31 is connected with the electric energy output end of the gas internal combustion generator 1.
And a cylinder sleeve cooling pipeline of the gas internal combustion generator 1 is also connected with a first radiator 5. The cooling oil pipeline of the gas internal combustion generator 1 is connected with a second radiator 6. In summer, when the gas internal combustion generator 1 is not needed for heating and needs to generate electricity, the first radiator 5 and the second radiator 6 can be started, the waste heat of the cylinder sleeve of the gas internal combustion generator 1 and the waste heat of the cooling oil are respectively dissipated, and the normal work of the gas internal combustion generator 1 is guaranteed.
As shown in fig. 2, the third heat exchanger 23 of the air source heat pump 41 includes a V-shaped heat absorbing plate 43, the flue gas discharging pipeline 44 is disposed below the V-shaped heat absorbing plate 43, flue gas spraying holes 45 (not shown in the figure) facing the V-shaped heat absorbing plate 43 are disposed on the flue gas discharging pipeline 44, a condensation water outlet 46 is disposed on the flue gas discharging pipeline 44, water vapor contained in the flue gas is condensed into water in the process of being discharged outwards in the flue gas discharging pipeline 44, and condensed water in the flue gas discharging pipeline 44 can be discharged through the condensation water outlet 46.
The high-temperature flue gas with the temperature of 480-520 ℃ generated by the gas internal combustion generator 1 is reduced to 28-32 ℃ through the first heat exchanger 21, the second heat exchanger 22 and the third heat exchanger 23. The return water of the heating system passes through the sixth heat exchanger 42, the fifth heat exchanger 32 and the second heat exchanger 22 and then is heated to 65-75 ℃, and the return water of the heating system passes through the fourth heat exchanger 24 and the first heat exchanger 21 and then is heated to 100 ℃ and then returns to the heating system.
When the system works, the low-temperature hot water generated after the heating backwater passes through the air source heat pump 41 is returned to the heating system after the temperature of the low-temperature hot water reaches 100 ℃ through the waste heat of the cylinder sleeve of the internal combustion engine and the high-temperature flue gas. At the water inlet end of the heating backwater, low-temperature flue gas and outdoor air jointly make low-temperature backwater through the air source heat pump 41, the low-temperature flue gas provides a suitable working environment for the air source heat pump 41, particularly in winter, condensation and frost of the air source heat pump 41 are avoided, in the working process of the air source heat pump 41, the low-temperature flue gas only plays a role in supplementing energy, and most of the energy of the air source heat pump 41 comes from the air.
The combined heat and power heating system has the following advantages:
1. the energy efficiency ratio of the air source heat pump 41 is improved by utilizing the flue gas waste heat generated by the gas internal combustion generator 1, and the working environment is improved.
2. The heating heat of the system mainly comprises the heat generated by the air source heat pump 41 and is supplemented by the waste heat generated by the gas internal combustion generator 1; the system makes full use of the waste heat water and the high-temperature flue gas generated by the gas internal combustion generator 1 during working, and has high heat utilization rate.
3. The air source heat pump 41 and the gas internal combustion engine are complementary, so that the energy efficiency ratio of the whole system is improved, and the energy efficiency ratio is 1.6-1.7 times that of a pure gas boiler heating system.
The heat and power combined heating system based on the gas internal combustion generator and the heat pump is used as a complete self-sufficient system for power generation and heating, can be applied to office buildings, business supermarkets, communities and other places to form a self-heating system, does not need to lay pipelines in a large scale, and compared with a traditional centralized heating mode, the heat loss in the conveying process can be ignored, so that the energy is greatly saved; the system can replace a gas boiler for heating, and the operation cost is reduced to about 60 percent; the gas internal combustion generator 1 can be used for a standby power supply all the year round, can also be operated when the electricity price is high, and simultaneously generates auxiliary products such as steam, hot water and the like; the fuel gas can use combustible gases such as biomass gas, methane, coal gas and the like, and meets the diversified heating requirements of the heating market in China except electricity, natural gas and coal; the combined heat and power heating system based on the gas internal combustion generator and the heat pump has great market prospect in winter heating areas in the north of China; in developed areas of the breeding industry in China, animal wastes can be used for producing a large amount of biogas, so that the combined heat and power heating system is very suitable for being used.
When the gas internal combustion generator 1 works, 38% of energy generated by gas working is converted into mechanical energy and 62% is converted into heat energy, wherein 36.5% of 38% of mechanical energy is used for power generation consumption and 1.5% of generator loss; 62% of the heat energy is recycled through the smoke discharge pipeline 44, the cylinder sleeve cooling pipeline and the cooling oil pipeline, 49.5% of the 62% of the heat energy is recycled, and the heat energy recovery rate reaches 80%.
The energy consumption of various devices for heating 1 ton of water at 1 c to 100 c is listed in the table below.
As can be seen from the comparison of the data in the table, the technical scheme has the best economic efficiency and greatly saves energy.
The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. Heating system is united to heat electricity based on gas engine generator and heat pump which characterized in that: the system comprises a gas internal combustion generator, wherein a first heat exchanger, a second heat exchanger and an air source heat pump are sequentially arranged on a flue gas discharge pipeline of the gas internal combustion generator, and the air source heat pump is connected with a water return pipeline of a heating system; a cylinder sleeve cooling pipeline of the gas internal combustion engine generator is connected with a fourth heat exchanger;
the air source heat pump comprises a third heat exchanger connected with the smoke discharge pipeline, the third heat exchanger is connected with a transfer heat exchanger, the transfer heat exchanger is connected with a sixth heat exchanger, the sixth heat exchanger is connected with the water return pipeline of the heating system, and a water storage tank is arranged on a water return pipeline between the sixth heat exchanger and the transfer heat exchanger and flowing to the sixth heat exchanger;
the water return pipeline sequentially passes through the sixth heat exchanger, the second heat exchanger, the fourth heat exchanger and the first heat exchanger and returns to a water supply pipeline of the heating system; and the power supply end of the air source heat pump is connected with the electric energy output end of the gas internal combustion generator.
2. A gas internal combustion generator and heat pump based cogeneration heating system according to claim 1, wherein: a cooling oil pipeline of the gas internal combustion generator is connected with a water source heat pump, and the water source heat pump is connected with a fifth heat exchanger; the fifth heat exchanger is connected with the water return pipeline and is positioned between the sixth heat exchanger and the second heat exchanger; and the power supply end of the water source heat pump is connected with the electric energy output end of the gas internal combustion generator.
3. A gas internal combustion generator and heat pump based cogeneration heating system according to claim 1, wherein: and a cylinder sleeve cooling pipeline of the gas internal combustion engine generator is also connected with a first radiator.
4. A gas internal combustion generator and heat pump based cogeneration heating system according to claim 1, wherein: and a cooling oil pipeline of the gas internal combustion generator is connected with a second radiator.
5. A gas internal combustion generator and heat pump based cogeneration heating system according to claim 1, wherein: the third heat exchanger of the air source heat pump comprises a V-shaped heat absorption plate, the smoke discharge pipeline is arranged below the V-shaped heat absorption plate, smoke spray holes facing the V-shaped heat absorption plate are formed in the smoke discharge pipeline, and a condensation water outlet is formed in the smoke discharge pipeline.
6. A gas internal combustion generator and heat pump based cogeneration heating system according to claim 1, wherein: and the high-temperature flue gas at 480-520 ℃ generated by the gas internal combustion generator is reduced to 28-32 ℃ through the first heat exchanger, the second heat exchanger and the third heat exchanger.
7. A gas internal combustion generator and heat pump based cogeneration heating system according to claim 2, wherein: and the return water of the heating system passes through the sixth heat exchanger, the fifth heat exchanger and the second heat exchanger and then is heated to 65-75 ℃, and the return water of the heating system passes through the fourth heat exchanger and the first heat exchanger and then is heated to 100 ℃ and returns to the heating system.
8. A gas internal combustion generator and heat pump based cogeneration heating system according to any one of claims 1-7, wherein: and the outer wall of the flue gas discharge pipeline is provided with a heat insulation material.
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| CN202120875966.5U CN214745995U (en) | 2021-04-26 | 2021-04-26 | Gas internal combustion generator and heat pump-based thermoelectric combined heating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117685092A (en) * | 2023-12-07 | 2024-03-12 | 中国能源建设集团广东省电力设计研究院有限公司 | Gas distributed energy station and working method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117685092A (en) * | 2023-12-07 | 2024-03-12 | 中国能源建设集团广东省电力设计研究院有限公司 | Gas distributed energy station and working method |
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