CN110552810B - Comprehensive energy utilization system and method for reducing temperature difference of heat absorber of Stirling generator - Google Patents
Comprehensive energy utilization system and method for reducing temperature difference of heat absorber of Stirling generator Download PDFInfo
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- CN110552810B CN110552810B CN201910742421.4A CN201910742421A CN110552810B CN 110552810 B CN110552810 B CN 110552810B CN 201910742421 A CN201910742421 A CN 201910742421A CN 110552810 B CN110552810 B CN 110552810B
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- water
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- heat absorber
- stirling
- air suction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
Abstract
The invention discloses a comprehensive energy utilization system and method for reducing temperature difference of a heat absorber of a Stirling generator, aiming at the problem of local overheating caused by uneven heating of the heat absorber of the Stirling generator. According to the invention, the multi-port air suction ring pipe is additionally arranged on the basis of a conventional Stirling power generation system, when the local overheat occurs, the control system sends out a command, the air suction port is started, and the air pump is started at the same time, so that partial gas near the heat absorber is sucked into the multi-port air suction ring pipe, the gas flow is initiated, and the temperature field distribution condition on the heat absorber is changed. Meanwhile, the Stirling power generation system is cooled in a water cooling mode, and after cooling water absorbs heat exhausted by the Stirling engine, hot air sucked from the multi-port air suction ring pipe is absorbed by the air-water heat exchanger, so that energy waste is avoided, and the comprehensive energy utilization rate of the system is improved. The generated hot water with higher temperature can be used as one of the multi-combined products of the comprehensive energy station to supply to users, thereby improving the benefit of the comprehensive energy station.
Description
Technical Field
The invention relates to a comprehensive energy utilization system and method for reducing the temperature difference of a heat absorber of a Stirling generator, belongs to the technical field of Stirling generators, and is particularly used for operation of a Stirling power generation system and comprehensive energy utilization.
Background
The Stirling engine is an external combustion engine, can utilize various fuels to generate electricity, and is very suitable for utilizing new energy/renewable energy sources such as solar thermal power generation, garbage power generation, biomass power generation and the like. However, the problem of local overheating caused by uneven heating on the heat absorber of the Stirling power generation system occurs sometimes, and especially in the case of disc type solar power generation, the processing and mounting precision of the light condensing device makes the spot shape and the energy distribution difficult to control, and the uneven heating on the heat absorber is more normal. In addition, in recent years, the single-unit capacity of the dish type solar power generation equipment is gradually increased, the Stirling engine is changed into a plurality of cylinders from the previous single cylinder, and each cylinder is provided with a corresponding sub-area on the heat absorber. Because the Stirling engine is connected end to end through connecting rods among a plurality of cylinders, the mechanical energy is output in a linkage way, the difference of heating of all areas can bring great influence to the total output, and if the temperature difference of the sub-areas on the heat absorber is overlarge, the multi-cylinder linkage output is mismatched, and the situation of equipment damage can also occur. Therefore, the Stirling power generation system applied to the dish solar energy has higher requirements on the uniformity of heating on the heat absorber, and solves the problem of the uniformity on the heat absorber. In addition, with the development of the distributed energy concept, comprehensive energy utilization, improved energy utilization rate and multi-product co-supply are targets for future development. The Stirling power generation system is also output by the original single electricity, the function of utilizing hot water is gradually increased, and the dissipated heat is recovered through the hot water. However, the water outlet temperature of the general water-cooled Stirling generator is low, so that the requirements of users are difficult to meet.
In summary, there is no stirling power generation system that can simply, rapidly and reliably solve the problem of uneven heating on the heat absorber, and can improve the comprehensive energy utilization rate.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a comprehensive energy utilization system and method for reducing the temperature difference of a heat absorber of a Stirling generator.
The invention solves the problems by adopting the following technical scheme: the utility model provides a reduce comprehensive energy utilization system of Stirling generator absorber difference in temperature, its characterized in that includes absorber, stirling generator, baffle, water cooling device, upward water pipe, down water pipe, water pump, multiport suction ring canal, gas transmission pipeline, air pump, gas-water heat exchanger and accumulator, absorber, stirling generator and generator connect gradually, the baffle sets up in the outside of absorber, water cooling device sets up in the below of Stirling generator for cool off Stirling generator, the delivery port of upward water pipe is connected with water cooling device's water inlet, down water pipe's water inlet is connected with water cooling device's delivery port, the water pump is installed on the water pipe, down water pipe's delivery port is connected with gas-water heat exchanger's water inlet, multiport suction ring canal sets up with the absorber is adjacent, and multiport suction ring canal has seted up a plurality of on the wall towards the absorber, multiport suction ring canal is connected with gas transmission pipeline, gas transmission pipeline is connected with gas-water heat exchanger's air inlet, gas-water heat exchanger is connected with the accumulator, gas-water heat exchanger still is connected with gas pump-water heat exchanger.
Preferably, a plurality of temperature measuring devices are arranged in the cylinder of the Stirling generator and on the heat absorber.
Preferably, the temperature measuring device further comprises a control device, and the control device is connected with the temperature measuring device and the air pump.
Preferably, the diameter of the multi-port air suction ring pipe is several times larger than that of the opening, so that air is unblocked in the ring pipe as much as possible.
Preferably, the air suction pipe is not limited to a ring pipe, and is structurally allowed, so that equipment processing is facilitated, and the air suction pipe can be inserted in the middle of the pipe wall of the heat absorber.
Preferably, as used in a dish solar power generation system, the baffle should shield the multi-port suction grommet from reflected sunlight being directed onto the grommet.
Preferably, the gas transmission pipeline and the downlink water pipe are subjected to certain heat preservation.
The comprehensive energy utilization method for reducing the temperature difference of the heat absorber of the Stirling generator is characterized by comprising the following steps of using the comprehensive energy utilization system for reducing the temperature difference of the heat absorber of the Stirling generator; the process is as follows:
a plurality of air inlets formed in the multi-port air suction ring pipe can be closed or opened, air is driven to flow by the air pump, and sucked air enters the air transmission pipeline from the air outlet; when the temperature displayed by a thermocouple on the heat absorber or in the cylinder exceeds a limit value or the temperature difference between the subareas exceeds an allowable temperature difference, the control system sends out an instruction, selects which air inlets are opened by the multi-port air suction ring pipe, and simultaneously starts the air pump, so that partial gas near the heat absorber is sucked by the multi-port air suction ring pipe, the gas flow is initiated, and the temperature field distribution condition of the heat absorber is changed; the hot air is transmitted to the air-water heat exchanger along the air transmission pipeline, heat is transmitted to the downlink cooling water, and then the air after heat exchange is discharged;
the water cooling device cools the Stirling generator in a water cooling mode; the cooling water transmission pipeline comprises an uplink water pipe and a downlink water pipe, the uplink water pipe is directly connected to the Stirling power generation system from a water source, after the cooling water cools the Stirling power generator through the water cooling device, the temperature of the cooling water rises and is discharged from the Stirling power generation system, and after the cooling water enters the gas-water heat exchanger through the downlink water pipe to absorb the heat of high-temperature gas from the gas transmission pipeline, the temperature further rises; the cooling water with higher temperature is directly supplied to a required user or stored in a water storage tank for other purposes to be comprehensively utilized; the water temperature and the water quantity are regulated by controlling the air suction quantity of the multi-port air suction ring pipe and the flow quantity of the cooling water, so that the parameter requirements of users are met.
Compared with the prior art, the invention has the following advantages and effects: aiming at the problem of local overheating caused by uneven heating of a heat absorber of a Stirling power generation system (especially for disc solar power generation), the invention is additionally provided with a multi-port air suction ring pipe on the basis of a conventional Stirling power generation system, when the local overheating occurs, the control system analyzes and then sends out instructions, and selects which air suction ports are opened, and simultaneously an air pump is started, so that the multi-port air suction ring pipe sucks partial gas near the heat absorber, gas flow is caused, and the temperature field distribution condition on the heat absorber is changed. Meanwhile, the Stirling power generation system is cooled in a water cooling mode, and after cooling water absorbs heat exhausted by the Stirling engine, hot air sucked from the multi-port air suction ring pipe is absorbed by the air-water heat exchanger, so that energy waste is avoided, and the comprehensive energy utilization rate of the system is improved. The generated hot water with higher temperature can be used as one of the multi-ply products of the comprehensive energy station to supply to users, thereby improving the benefit of the comprehensive energy station and promoting the commercialization development of the distributed comprehensive energy system.
Drawings
Fig. 1 is a schematic overall structure of an embodiment of the present invention.
In the figure: 1-a heat absorber; a 2-Stirling generator; a 3-generator; 4-baffle plates; 5-a water cooling device; 6-an uplink water pipe; 7-a downlink water pipe; 8-a water pump; 9-multiple inlet suction loop; 10-a gas transmission pipeline; 11-an air pump; 12-a gas-water heat exchanger; 13-a water storage tank.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and not limited to the following examples.
Referring to fig. 1, the integrated energy utilization system for reducing the temperature difference of the heat absorber of the stirling generator in the present embodiment includes: the Stirling power generation system (a heat absorber 1, a Stirling engine 2, a generator 3, a baffle 4, a shell and a water cooling device 5), a cooling water transmission pipeline (an uplink water pipe 6 and a downlink water pipe 7), a water pump 8, a multi-port air suction ring pipe 9, a gas transmission pipeline 10, an air pump 11, a gas-water heat exchanger 12, a water storage tank 13, a control device and the like.
The heat absorber 1, the Stirling generator 2 and the generator 3 are sequentially connected, the baffle 4 is arranged on the outer side of the heat absorber 1, the water cooling device 5 is arranged below the Stirling generator 2 and used for cooling the Stirling generator 2, the water outlet of the water ascending pipe 6 is connected with the water inlet of the water cooling device 5, the water inlet of the water descending pipe 7 is connected with the water outlet of the water cooling device 5, the water pump 8 is arranged on the water ascending pipe 6, the water outlet of the water descending pipe 7 is connected with the water inlet of the gas-water heat exchanger 12, the multi-port gas suction ring pipe 9 is arranged adjacent to the heat absorber 1, the multi-port gas suction ring pipe 9 is connected with the gas transmission pipeline 10, the gas transmission pipeline 10 is connected with the gas inlet of the gas-water heat exchanger 12, the gas-water heat exchanger 12 is connected with the water storage tank 13, and the gas-water heat exchanger 12 is also connected with the gas pump 11.
The multi-port air suction ring pipe 9 is arranged at the position of the heat absorber 1, the size of the multi-port air suction ring pipe 9 is slightly larger than that of the heat absorber 1, a plurality of air suction ports are formed in the multi-port air suction ring pipe 9 towards the direction of the heat absorber 1 and are uniformly distributed, each port can be closed or opened, the air pump 11 drives air to flow, and sucked air enters the air transmission pipeline 10 from the air outlet. A plurality of thermocouples or other temperature measuring devices are arranged in the cylinder of the Stirling engine 2 and on the heat absorber 1. When the temperature displayed by a thermocouple on the heat absorber 1 or in a cylinder exceeds a limit value or the temperature difference between the subareas exceeds an allowable temperature difference, the control system gives out an instruction, selects which air suction ports are opened by the multi-port air suction ring pipe 9, and simultaneously starts the air pump 11, so that partial air near the heat absorber 1 is sucked by the multi-port air suction ring pipe 9, the air flow is initiated, and the temperature field distribution condition of the heat absorber 1 is changed. The hot air is transferred along the gas transfer line 10 to the gas-water heat exchanger 12, transferring heat to the downstream cooling water, and then discharging the heat exchanged air.
The water cooling device 5 is placed in the housing of the Stirling power generation system, and cools the Stirling power generator 2 in a water cooling manner. The cooling water transmission pipeline comprises an uplink water pipe 6 and a downlink water pipe 7, the uplink water pipe 6 is directly connected to the Stirling power generation system from a water source, after the cooling water cools the Stirling power generator 2 through the water cooling device 5, the temperature of the cooling water rises and is discharged from the Stirling power generation system, and after the cooling water enters the gas-water heat exchanger 12 through the downlink water pipe 7 to absorb the heat of the high-temperature gas from the gas transmission pipeline 10, the temperature further rises. The cooling water with higher temperature is directly supplied to the needed users or stored in the water storage tank 13 for other purposes to be comprehensively utilized; the water temperature and the water quantity are regulated by controlling the air suction quantity of the multi-port air suction ring pipe 9 and the flow quantity of the cooling water, so that the parameter requirements of users are met.
Although the present invention has been described with reference to the above embodiments, it should be understood that the present invention is not limited to the above embodiments, and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention.
Claims (3)
1. The comprehensive energy utilization method for reducing the temperature difference of the heat absorber of the Stirling generator is characterized by adopting a comprehensive energy utilization system for reducing the temperature difference of the heat absorber of the Stirling generator, the comprehensive energy utilization system comprises a heat absorber (1), a Stirling generator (2), a generator (3), a baffle plate (4), a water cooling device (5), an uplink water pipe (6), a downlink water pipe (7), a water pump (8), a multi-port air suction ring pipe (9), a gas transmission pipeline (10), an air pump (11), a gas-water heat exchanger (12) and a water storage tank (13), wherein the heat absorber (1), the Stirling generator (2) and the generator (3) are sequentially connected, the baffle plate (4) is arranged on the outer side of the heat absorber (1), the water cooling device (5) is arranged below the Stirling generator (2) and is used for cooling the Stirling generator (2), a water outlet of the uplink water pipe (6) is connected with a water inlet of the water cooling device (5), a water inlet of the downlink water pipe (7) is connected with a water outlet of the water cooling device (5), the water pump (8) is arranged on the uplink water pipe (6), the water inlet of the downlink water pipe (7) is connected with the water inlet of the water cooling device (12), the multi-port air suction ring pipe (9) is arranged adjacent to the heat absorber (1), a plurality of air suction ports are formed in the wall, facing the heat absorber (1), of the multi-port air suction ring pipe (9), the multi-port air suction ring pipe (9) is connected with the air transmission pipeline (10), the air transmission pipeline (10) is connected with the air inlet of the air-water heat exchanger (12), the air-water heat exchanger (12) is connected with the water storage tank (13), and the air-water heat exchanger (12) is also connected with the air pump (11);
the comprehensive energy utilization method comprises the following steps:
a plurality of air inlets formed in the multi-port air suction ring pipe (9) can be closed or opened, air is driven by the air pump (11) to flow, and sucked air enters the air transmission pipeline (10) from the air outlet; when the temperature displayed by a thermocouple on the heat absorber (1) or in a cylinder exceeds a limit value or the temperature difference between the subareas exceeds an allowable temperature difference, the control system sends out an instruction, selects which air suction ports of the multi-port air suction ring pipe (9) are opened, and simultaneously starts the air pump (11), so that partial air near the heat absorber (1) is sucked into the multi-port air suction ring pipe (9), the air flow is initiated, and the temperature field distribution condition of the heat absorber (1) is changed; the hot air is transmitted to the air-water heat exchanger (12) along the gas transmission pipeline (10), heat is transmitted to the downlink cooling water, and then the air after heat exchange is discharged;
the water cooling device (5) cools the Stirling generator (2) in a water cooling mode; the cooling water transmission pipeline comprises an uplink water pipe (6) and a downlink water pipe (7), the uplink water pipe (6) is directly connected to the Stirling power generation system from a water source, after the cooling water cools the Stirling power generator (2) through the water cooling device (5), the temperature of the cooling water rises and is discharged from the Stirling power generation system, and after the cooling water enters the gas-water heat exchanger (12) through the downlink water pipe (7) to absorb the heat of the high-temperature gas from the gas transmission pipeline (10), the temperature further rises; the cooling water with higher temperature is directly supplied to the needed users or stored in the water storage tank (13) for other purposes to be comprehensively utilized; the water temperature and the water quantity are regulated by controlling the air suction quantity of the multi-port air suction ring pipe (9) and the flow quantity of the cooling water, so that the parameter requirements of users are met.
2. The comprehensive energy utilization method for reducing the temperature difference of the heat absorber of the Stirling generator according to claim 1, wherein a plurality of temperature measuring devices are arranged in the cylinder of the Stirling generator (2) and on the heat absorber (1).
3. The integrated energy utilization method for reducing the temperature difference of the heat absorber of the Stirling generator according to claim 2, further comprising a control device connected to the temperature measuring device and the air pump (11).
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| CN201910742421.4A CN110552810B (en) | 2019-08-13 | 2019-08-13 | Comprehensive energy utilization system and method for reducing temperature difference of heat absorber of Stirling generator |
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| CN201910742421.4A CN110552810B (en) | 2019-08-13 | 2019-08-13 | Comprehensive energy utilization system and method for reducing temperature difference of heat absorber of Stirling generator |
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| CN110552810B true CN110552810B (en) | 2023-09-08 |
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