CN102588024B - Low ebb electricity and waste heat recovering, storing and recycling system of internal combustion engine generator - Google Patents
Low ebb electricity and waste heat recovering, storing and recycling system of internal combustion engine generator Download PDFInfo
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- CN102588024B CN102588024B CN201110020886.2A CN201110020886A CN102588024B CN 102588024 B CN102588024 B CN 102588024B CN 201110020886 A CN201110020886 A CN 201110020886A CN 102588024 B CN102588024 B CN 102588024B
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The invention discloses a low ebb electricity and waste heat recovering, storing and recycling system of an internal combustion engine generator. The low ebb electricity and waste heat recovering, storing and recycling system comprises the internal combustion engine generator, an air compressing device, a waste heat recovering device, an air heat exchanging device and an expansion machine, wherein the air compressing device is used for recovering and storing low ebb electricity in a mode of compressed air when electricity utilization is in a low ebb; the waste heat recovering device is used for recovering and storing waste heat generated by the generator and the compressing device in the work process; and when needed, with the adoption of the air heat exchanging device, the compressed air released from the air compressing device can absorb heat in the waste heat recovering device and enter the expansion machine to do work. The invention also discloses a low ebb electricity and waste heat recovering, storing and recycling method of the internal combustion engine generator. According to the low ebb electricity and waste heat recovering, storing and recycling system, waste heat recovering and low ebb electricity storing are combined to be used in generating technology, therefore, the energy utilization efficiency of the internal combustion engine generator is effectively improved, in addition, the utilization patterns of the waste heat are broadened, and the effect of peak shaving is acted on the internal combustion engine generator.
Description
Technical field
The present invention relates to trough-electricity and heat recovery, storage and the recycling system of internal combustion engine generator, in particular to the waste heat of diesel generator and the recovery of trough-electricity, storage and utilization and peak regulation system.
Background technique
Internal combustion engine generator is as the stand-by power main source of the supplementary and enterprises and institutions of peak times of power consumption power demand, its using scope is more and more extensive, internal combustion engine generator has comprised fuel electric generator and gas electricity generator, fuel electric generator can comprise diesel generator again, gasoline engine generators etc., what diesel generator was current is most widely used.At present for adopting the power generation system that diesel oil is fuel, only there is the fuel energy of 35% left and right to be converted into electric energy by generator, other energy of approximately 30% and 25% are taken away by waste gas and generator cooling-water respectively, and the unknown losses such as fuselage dissipation of heat of generator have also accounted for total energy 10% left and right.For the inefficient problem of fuel utilization in internal combustion engine generator working procedure, in prior art, there is the technique of the waste heat of multiple recycling generator, in particular for reclaiming the technique of diesel emission using waste heat from tail gas.Generally, these technology are all mainly directly to utilize the waste heat producing in working process of diesel engine, for heating and heating, or utilize hot and cold, Electricity Federation to produce for central air-conditioner etc. waste heat.The defect of the equal various degrees of these UTILIZATION OF VESIDUAL HEAT IN techniques, such as versatility is poor.And, because existing heat recovery technology has adopted the form of direct recovery waste heat more, and be used with hot form, therefore need to be equipped with various heat utilization equipment associated therewith.The utilization ratio that the problem that existing UTILIZATION OF VESIDUAL HEAT IN mode also exists is waste heat is low.The current means that have multiple heat recovery for internal combustion engine generator, have designed multiple corresponding purposes, but these means recovery rate are generally not high, and the waste heat that especially cooling water is taken away, does not almost have corresponding recovery scheme.Its reason is mainly that the heat recovery scheme of current diesel engine is just carried out classification recycling according to the grade of waste heat, has caused the unreasonable of heat recovery scheme, and heat recovery rate is low; Waste heat energy after recovery is most of for heating and heating, or replace chilled water by lithium bromide cooling-water machine, form operating mode hot and cold, that produce Electricity Federation, though reclaimed the available energy of the part in waste heat, but because the production of heat energy and use amount are difficult to control, and the manufacturing side of waste heat and hot user be two relatively independent parts, caused heat utilization equipment often in irregular operation state, overall efficiency is low, has also limited greatly the popularization of all kinds of heat recovery technology.
In addition; in generator working procedure, usually there will be zero load or low power consumption phenomenon, its specific power oil consumption increases, thereby causes waste, the environmental pollution of fuel; when peak of power consumption is greater than internal combustion engine generator rated power, generator can not meet system works requirement.To this problem, although energy-storage battery technology can play certain Peak Load Adjustment, due to the restriction of its user cost and efficiency, be difficult to application widely in internal combustion engine power generating system.
Summary of the invention
The object of the invention is to for existing above-mentioned defect in prior art, a kind of internal combustion engine generator trough-electricity and heat recovery, storage and recycling system with greater efficiency is provided.
Internal combustion engine generator trough-electricity of the present invention and heat recovery, storage and recycling system comprise internal combustion engine generator; Air compression plant, this device is electrically connected to described internal combustion engine generator, for trough-electricity being reclaimed and stored with pressurized air form when the low power consumption; Waste heat recovering device, this device and described internal combustion engine generator and waste heat recovering device are respectively to conduct heat and are connected, and for the waste heat that generator described in internal combustion and air compression plant are produced in the course of the work, reclaim and store; The air heat-exchanging device and the decompressor that are connected with described air compression plant, when needed wherein, the pressurized air being discharged by this air compression plant can carry out heat exchange with the described waste heat that is reclaimed and stored by this waste heat recovering device, then enters in decompressor and expands and do work.Here, described decompressor air turbine machine preferably.
In described system, described air compression plant comprises compressor and the high pressure tank that gas circuit is connected.Described Preheating unit is preferably annular fin and by the mode of air-cooled or water-cooled, strengthens the heat exchange efficiency of this radiating fin.This waste heat recovering device preferably includes multi-level phase change accumulation of heat mechanism, as the accumulation of heat/heat-exchange system being formed by three grades of heat-accumulating materials, so that the pressurized air that temperature is lower sequentially passes through three grades of regenerative systems, as far as possible fully absorb the available thermal energy containing in tail gas and cooling water.
In said system, preferably, before air heat-exchanging device, in system gas circuit, be provided with the Preheating unit that makes pressurized air and ambient air carry out heat exchange, to utilize external heat to improve pressurized gas temperature, and then improve its flow velocity.
The invention also discloses a kind of internal combustion engine generator trough-electricity and heat recovery, storage and recycling method, it comprises: utilize internal combustion engine generator generating; When low power consumption, make the air compression plant work that is electrically connected to this internal combustion engine generator, so that the trough-electricity that this internal combustion engine generator was produced is reclaimed and to be stored with pressurized air form; The waste heat that this internal combustion engine generator and this air compression plant are produced is in the course of the work reclaimed and is stored; The pressurized air that reclaimed and stored by this air compression plant is introduced in decompressor externally to do work, wherein, before this pressurized air is sent into this decompressor, first made this pressurized air absorb the described waste heat that institute reclaims and stores.
The present invention combines heat recovery and trough-electricity recovery storage for generation technology, has effectively improved the energy utilization efficiency of internal combustion engine generator, and has widened the mode of utilizing of waste heat, also internal combustion engine generator has been played to Peak Load Adjustment.
Accompanying drawing explanation
Fig. 1 is trough-electricity and heat recovery, storage and the recycling system schematic of internal combustion engine generator of the present invention;
Fig. 2 is the graph of a relation between system effectiveness of the present invention and pressurized air flow velocity;
Fig. 3 is the graph of a relation between system output power of the present invention and pressurized air flow velocity.
Embodiment
Below with reference to accompanying drawing, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention is not subject to the restriction of embodiment.
As described in Figure 1, this concrete internal combustion engine generator trough-electricity and heat recovery, storage and recycling system comprise: internal combustion engine generator 1; The air compression plant being formed by air compressor 2 and high pressure tank 3; Flow control valve 4; The pressurized air Preheating unit 5 being formed by annular fin and fan; Hold/the heat-exchanger rig 6 being formed by heat-accumulating material; Decompressor 7; Generator 8.Here, described internal combustion engine generator 1 is preferably diesel generator, and air compressor 2, high-pressure gas cylinder 3, pressurized air Preheating unit 5, hold/heat-exchanger rig 6 and decompressor 7 be interconnected successively in gas circuit, and fluid is communicated with in other words; Generator 1 and air compressor 2 are communicated with hold/heat-exchanger rig 6 water routes respectively, thereby the waste heat that generator 1 and air compressor 2 produced at work can be passed to hold/heat-exchanger rig 6 and be stored by working medium (water).
When low power consumption, namely, in the underloaded situation of output terminal, start air compressor 2, the major part of the electric energy that generator 1 produces is transported to user 9, and remaining electricity part valley electricity driving in other words air compressor 2 is compressed in gas holder 3 air adiabatic.When peak of power consumption or internal combustion engine generator 1 are closed and need electricity consumption, can be according to the use amount turn-on flow rate regulating valve 4 of user's 9 electric energy, pressurized air generation volumetric expansion through flow control valve 4, temperature reduces, but when it flows through pressurized air Preheating unit 5, pressurized air returns to normal temperature substantially because carrying out heat exchange with the external world.Subsequently, flow through hold/heat-exchanger rig 6 of the pressurized air after preheating absorbs heats, and compressed-air actuated volume flowrate increases, and be directly used in and drive decompressor 7, decompressor 7 and then drive generator 8 generatings, output power is to user 9.For needs, directly utilize the user of residual heat resources, the present invention also can by residual heat resources according to hot user's demand classification adjustable export.Here, compressor is preferably multistage compressor.
Hold/heat-exchanger rig 6 is waste heat recovering device, for the waste heat that internal combustion engine generator 1 and air compressor 2 are produced in the course of the work, reclaims and stores.The various heat-accumulating materials that this waste heat recovering device can be commonly used in prior art form, and its structure is preferably arranged to multi-level phase change accumulation of heat mechanism, so that according to different types of residual heat resources in waste heat energy level difference reclaiming system, such as cooling water heat, diesel tail gas waste heat, the heat of compression etc., thereby can reclaim largely kind diesel residual heats at different levels, especially in low-grade cooling water, waste heat is reclaimed, and the recycling efficiency of waste heat can reach 70%～80%.
In this device, the pressurized air electric power storage system forming due to compressor 2, gas holder 3, hold/heat-exchanger rig 6 and decompressor 7 is divided into two independently parts by power end and user side, play the effect of " Pinggu, peak disappears " peak regulation, can make internal combustion engine generator work all the time in best running state.The utilization ratio of system fuel is also by by 35% bringing up to more than 55% in the past, and the maximum output of internal combustion engine generator can improve 3 times of left and right, thereby meets the requirement of peak electricity consumption.
Radiating fin in pressurized air Preheating unit 5 also can be used other shape and structure, and for strengthening its heat exchange efficiency, radiating fin can also be put into water to replace fan, to form water-cooled Preheating unit.
Shown in Fig. 2 is the graph of a relation between system summation efficiency of the present invention and pressurized air flow velocity.The system summation efficiency here refers to system total efficiency value, and its calculating formula can be expressed as:
The calorific value of system summation efficiency=(the external output power value of the external output power value+residual neat recovering system of internal combustion engine generator)/consumption diesel oil
Fig. 3 is system gross output of the present invention and pressurized air flow velocity relation.
From Fig. 2 and Fig. 3, can learn, system summation efficiency is that system output power all improves along with the increase of pressurized air flow velocity.In the present invention, because pressurized air has experienced preheating and absorbed after interior the stored waste heat of hold/heat-exchanger rig 6 before entering decompressor acting, its flow velocity increases, thereby has effectively improved system effectiveness and system output power.Evidence, when power load is greater than the maximum rated output power of internal combustion engine generator, turn-on flow rate regulating valve, when compressed-air actuated flow set is 0.06kg/s, the total efficiency value of system is 48%, the external output power peak value of system is 65kw.If be 0.31kg/s compressed-air actuated flow set, the total efficiency value of system can bring up to 57%, and the external output power peak value of system can be brought up to 160kw.
Although above reference example and accompanying drawing describe the present invention, the present invention is not limited to above-mentioned specific features and design.To those skilled in the art, do not need in the above description with the size and dimension of each parts of numeric representation, these can come to determine as the case may be.Except given example, do not exceeding under the prerequisite of the scope of the invention, those skilled in the art change or are equal to the scope that replacement all should belong to the present invention having read the institute that above description can make.
Claims (9)
1. internal combustion engine generator trough-electricity and heat recovery, storage and a recycling system, comprising:
Internal combustion engine generator;
Air compression plant, it is electrically connected to this internal combustion engine generator, in low power consumption time work so that the trough-electricity by this internal combustion engine generator was produced is reclaimed and to be stored with pressurized air form;
Waste heat recovering device, it conducts heat and is connected respectively with this air compression plant with this internal combustion engine generator, for the waste heat that this internal combustion engine generator and this air compression plant are produced in the course of the work, is reclaimed and stores;
It is characterized in that, this system also comprises air heat-exchanging device and the decompressor being communicated with this air compression plant, wherein, the pressurized air being discharged by this air compression plant can carry out heat exchange with the described waste heat that is reclaimed and stored by this waste heat recovering device, then enters in decompressor and expands and do work.
2. system according to claim 1, is characterized in that, this air compression plant comprises air compressor and the high pressure tank that gas circuit is connected.
3. system according to claim 1, is characterized in that, before this air heat-exchanging device, is provided with the Preheating unit that makes pressurized air and ambient air from this air compression plant carry out heat exchange in the gas circuit of this system.
4. system according to claim 3, is characterized in that, this Preheating unit is annular fin and is provided with for strengthening the fan of the heat exchange efficiency of this radiating fin.
5. system according to claim 1, is characterized in that, this waste heat recovering device comprises multi-level phase change accumulation of heat mechanism.
6. according to the system one of claim 1 to 5 Suo Shu, it is characterized in that, described decompressor is air turbine machine.
7. internal combustion engine generator trough-electricity and heat recovery, storage and a recycling method, comprising:
Utilize internal combustion engine generator generating;
When low power consumption, make the air compression plant work that is electrically connected to this internal combustion engine generator, so that the trough-electricity that this internal combustion engine generator was produced is reclaimed and to be stored with pressurized air form;
The waste heat that this internal combustion engine generator and this air compression plant are produced is in the course of the work reclaimed and is stored;
The pressurized air that is reclaimed and stored by this air compression plant is introduced in decompressor externally to do work;
It is characterized in that, before this pressurized air is sent into this decompressor, first make this pressurized air absorb the described waste heat that institute reclaims and stores.
8. method according to claim 7, is characterized in that, this pressurized air carried out heat exchange by Preheating unit and ambient air before absorbing the described waste heat that institute reclaims and store.
9. according to the method described in claim 7 or 8, it is characterized in that, by being the waste heat recovering device of multi-level phase change accumulation of heat mechanism form, carry out recovery and the storage of described waste heat.
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| CN201110020886.2A CN102588024B (en) | 2011-01-18 | 2011-01-18 | Low ebb electricity and waste heat recovering, storing and recycling system of internal combustion engine generator |
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| CN201110020886.2A CN102588024B (en) | 2011-01-18 | 2011-01-18 | Low ebb electricity and waste heat recovering, storing and recycling system of internal combustion engine generator |
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| CN102797516B (en) * | 2012-07-30 | 2016-01-20 | 吉林省电力有限公司辽源供电公司 | Various natural energies supports general type electrical network Xiao Feng Pinggu storage station of synergy |
| CN106152233B (en) * | 2015-04-13 | 2019-04-09 | 南京金合能源材料有限公司 | A kind of multifunctional steam based on heat accumulation/air heating method and apparatus |
| CN105781648B (en) * | 2015-06-20 | 2020-09-29 | 浦江县汕淋贸易有限公司 | Off-peak electricity storage peak regulation system and operation control method thereof |
| CN105019960B (en) * | 2015-06-20 | 2016-11-30 | 许继电气股份有限公司 | The storage of power system trough-electricity and peak regulation control system |
| CN108361070B (en) * | 2018-03-10 | 2020-08-07 | 温州雪榕机械科技有限公司 | Output pressure adjustable self-adaptation pneumatic engine |
| CN108361072B (en) * | 2018-03-10 | 2020-08-07 | 温州雪榕机械科技有限公司 | Single-cylinder pneumatic motor |
| CN108361071B (en) * | 2018-03-10 | 2020-08-07 | 温州雪榕机械科技有限公司 | Pneumatic engine |
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| CN1451921A (en) * | 2003-05-20 | 2003-10-29 | 西安交通大学 | Method and device for recovering phase change storage heat of condensation heat-extraction for compressing condensing unit |
| CN200940918Y (en) * | 2006-08-11 | 2007-08-29 | 上海海事大学 | Heat recovery apparatus having air cooling heat pump system |
| CN101506469A (en) * | 2006-08-21 | 2009-08-12 | 韩国机械研究院 | Compressed-air-storing electricity generating system and electricity generating method using the same |
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| CA2591805C (en) * | 2004-12-23 | 2012-10-23 | Alstom Technology Ltd. | Power plant |
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Patent Citations (4)
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| US4100745A (en) * | 1976-03-15 | 1978-07-18 | Bbc Brown Boveri & Company Limited | Thermal power plant with compressed air storage |
| CN1451921A (en) * | 2003-05-20 | 2003-10-29 | 西安交通大学 | Method and device for recovering phase change storage heat of condensation heat-extraction for compressing condensing unit |
| CN200940918Y (en) * | 2006-08-11 | 2007-08-29 | 上海海事大学 | Heat recovery apparatus having air cooling heat pump system |
| CN101506469A (en) * | 2006-08-21 | 2009-08-12 | 韩国机械研究院 | Compressed-air-storing electricity generating system and electricity generating method using the same |
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