CN104481615A - Organic working medium power generation device driven by using low-grade heat energy - Google Patents
Organic working medium power generation device driven by using low-grade heat energy Download PDFInfo
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- CN104481615A CN104481615A CN201410680177.0A CN201410680177A CN104481615A CN 104481615 A CN104481615 A CN 104481615A CN 201410680177 A CN201410680177 A CN 201410680177A CN 104481615 A CN104481615 A CN 104481615A
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Abstract
The invention discloses an organic working medium power generation device driven by using low-grade heat energy, which comprises a first heat exchanger and a second heat exchanger; a cold source and a heat source, used for supplying cooling liquid or heating liquid respectively; a first four-way valve, connected with the heat exchange tube of the first heat exchanger, the heat exchange tube of the second heat exchanger, the cold source and the heat source; a third four-way valve, connected with the organic working medium outlet and inlet of the first heat exchanger, the organic working medium outlet and inlet of the second heat exchanger, and the inlet and outlet of an expansion machine, and the expansion machine is connected with a generator; wherein, by switching the conducting state of the first four-way valve and the third four-way valve, the first heat exchanger is used as an evaporator, the second heat exchanger is used as a condenser, or, the first heat exchanger is used as a condenser, the second heat exchanger is used as an evaporator; the heating liquid enters the heat exchange tube of the evaporator for conducting heat exchange through the first four-way valve, and the cooling liquid enters the heat exchange tube of the condenser for conducting heat exchange through the first four-way valve.
Description
Technical field
The present invention relates to power generating equipment technical field, particularly a kind of organic working medium electricity generating device utilizing low grade heat energy to drive.
Background technique
Organic Rankine bottoming cycle (ORC) is converted into the technology of electric energy as a kind of heat energy by middle-low grade (as solar energy, biomass energy, industrial waste heat and geothermal power), causes and studies widely.Shown in Fig. 1 is existing conventional organic working medium electricity generating device, in the process of organic Rankine bottoming cycle low-grade heat energy power-generating in the application, there is the electric energy of a bottleneck problem and the consumption of high-pressure working medium pump in especially small-sized organic Rankine bottoming cycle, because the pressure of high-pressure working medium pump discharge must be not less than evaporating pressure, for organic working medium refrigeration agent R245fa, when evaporating temperature is 100 DEG C, evaporating pressure is 1.26 MPa, pump inlet pressure is 0.18 MPa simultaneously, high-pressure working medium pump needs refrigerant liquid to be pressurized to 1.26 MPa from 0.18 MPa, and the efficiency of high-pressure working medium pump is usually lower, therefore the electric energy of this process consumption can not be ignored relative to the generated energy of small-sized organic Rankine bottoming cycle, the clean generating efficiency causing system is low.As Shanghai Communications University turns round and look at big elaboration in its thesis for the doctorate " low grade heat energy organic substance Rankine power cycle study mechanism and experimental verification ": the experimental setup having built the 1kW organic Rankine bottoming cycle generating utilizing low grade heat energy to drive, thermal source adopts the hot water of less than 100 DEG C, working medium adopts refrigeration agent R600a, scroll expansion machine elected as by decompressor, when not considering the power consumption of high-pressure working medium pump, the maximum generating efficiency of system is 2.9%, when considering high-pressure working medium pump power consumption, generating efficiency is down to 1.5%, decreases by 48.2%.
Summary of the invention
The present invention is directed to prior art above shortcomings, provide a kind of organic working medium generating dress utilizing low grade heat energy to drive.The present invention is achieved through the following technical solutions:
The organic working medium electricity generating device utilizing low grade heat energy to drive, comprising:
First Heat Exchanger and the second heat exchanger, carry out heat exchange by organic working medium to the liquid flowing through internal heat exchange tubes;
Low-temperature receiver and thermal source, respectively in order to provide cooling liquid or heating liquid;
First four-way valve, connects the heat exchanging tube of First Heat Exchanger, the heat exchanging tube of the second heat exchanger, low-temperature receiver and thermal source respectively;
3rd four-way valve, connect the entrance and exit of the organic working medium gateway of First Heat Exchanger, the organic working medium gateway of the second heat exchanger and a decompressor respectively, decompressor connects a generator;
Wherein, by switching the on state of the first four-way valve and the 3rd four-way valve, First Heat Exchanger is as vaporizer, and the second heat exchanger is as condenser, or First Heat Exchanger is as condenser, and the second heat exchanger is as vaporizer; The heat exchanging tube that heating liquid enters vaporizer by the first four-way valve carries out heat exchange, and the heat exchanging tube that cooling liquid enters condenser by the first four-way valve carries out heat exchange;
Organic working medium in vaporizer absorbs the heat in heating liquid, gaseous state is converted to gradually by liquid condition, and entered from the entrance of decompressor by the 3rd four-way valve, after driving decompressor work, discharge from the outlet of decompressor, and enter condenser by the 3rd four-way valve, the heat absorption of the cooling liquid in condenser, the organic working medium converted back into liquid state gradually of gaseous state.
Preferably, also comprise:
Second four-way valve, connect the heat exchanging tube of First Heat Exchanger, the heat exchanging tube of the second heat exchanger, low-temperature receiver and thermal source respectively, the heating liquid after heat exchange and cooling liquid get back to thermal source and low-temperature receiver respectively by the second four-way valve.
Preferably, the ingress of thermal source and low-temperature receiver comprises a water pump respectively.
Preferably, First Heat Exchanger and the second heat exchanger comprise a filled mouth, in order to supplementary organic working medium.
Preferably, organic working medium comprises refrigeration agent R245fa.
The present invention makes heat exchanger play the effect of vaporizer and condenser by two four-way valves, a common use heating/cooling circuit, and save high-pressure working medium pump, system is more simply compact compared with prior art, and cost is lower, and clean generating efficiency is improved.
Accompanying drawing explanation
Shown in Fig. 1 is existing organic working medium generating device structure schematic diagram;
Shown in Fig. 2 is the structural representation of first embodiment of the invention;
Shown in Fig. 3 is the structural representation of second embodiment of the invention.
Embodiment
Below with reference to accompanying drawing of the present invention; clear, complete description and discussion are carried out to the technological scheme in the embodiment of the present invention; obviously; as described herein is only a part of example of the present invention; it is not whole examples; based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, belongs to protection scope of the present invention.
For the ease of the understanding to the embodiment of the present invention, be further explained for specific embodiment below in conjunction with accompanying drawing, and each embodiment does not form the restriction to the embodiment of the present invention.
As shown in Figure 2, in the first embodiment of the present invention, comprising: First Heat Exchanger 1, second heat exchanger 3, first four-way valve 9, low-temperature receiver 5, thermal source 11, the 3rd four-way valve 8, decompressor 7 and generator 6.Low-temperature receiver 5, thermal source 11 are used to provide cooling water and hot water respectively, and the first four-way valve 9 is used for the flow direction of controlled cooling model water and hot water.
The working principle of the present embodiment is as follows:
First using First Heat Exchanger 1 as vaporizer, the second heat exchanger 3 is as condenser, and in First Heat Exchanger 1, inject the organic working medium needed for heat exchange by filled mouth 10, be generally refrigeration agent R245fa, the present embodiment does not limit this.
By switching the on state of the first four-way valve 9, hot water in thermal source 11 flows in the heat exchanging tube of First Heat Exchanger 1 by the first four-way valve 9, organic working medium in First Heat Exchanger 1 is after absorbing the heat in hot water, saturated liquids is become successively by original overcooled liquid, saturated gas, overheated gas, pressure simultaneously in First Heat Exchanger 1 is also in rising, when pressure reaches a certain value, the entrance that the organic working medium (being preferably overheated gas state) of gaseous state is imported decompressor 7 by the 3rd four-way valve 8 is passed through from the organic working medium gateway of First Heat Exchanger 1, the organic working medium of the gaseous state of High Temperature High Pressure promotes decompressor 7 and rotates, decompressor 7 drive electrical generators generates electricity.Meanwhile, the organic working medium of gaseous state is discharged from the outlet of decompressor 7, is imported in the second heat exchanger 3 by the organic working medium gateway of the 3rd four-way valve 8 and the second heat exchanger 3.
The cooling water that low-temperature receiver 5 provides enters in the heat exchanging tube of the second heat exchanger 3 by the first four-way valve 9, heat exchange is carried out with the above-mentioned organic working medium entering the gaseous state of the High Temperature High Pressure of the second heat exchanger 3, the cooling water heat taken away in the organic working medium of gaseous state makes its condensation, gradually converted back into liquid state.
Now, the amount of the organic working medium in First Heat Exchanger 1 is fewer and feweri, when the organic working medium in First Heat Exchanger 1 be less than a certain amount of after, switch the first four-way valve 9 and the 3rd four-way valve 8.Hot water enters the heat exchanging tube of the second heat exchanger 3 by the first four-way valve 9, cooling water enters the heat exchanging tube of First Heat Exchanger 1 by the first four-way valve 9, namely First Heat Exchanger 1 has now changed condenser from original into as vaporizer, and the second heat exchanger 3 has changed vaporizer from original into as condenser.After the organic working medium being condensate in the liquid condition in the second heat exchanger 3 absorbs the heat of hot water in the second heat exchanger 3, become saturated liquids, saturated gas, overheated gas successively, simultaneously, pressure in second heat exchanger 3 constantly increases, when pressure reaches a certain value, the entrance that the organic working medium (being preferably overheated gas state) of gaseous state is imported decompressor 7 by the 3rd four-way valve 8 is passed through from the organic working medium gateway of the second heat exchanger 3, the organic working medium of the gaseous state of High Temperature High Pressure promotes decompressor 7 and rotates, and decompressor 7 drive electrical generators generates electricity.Meanwhile, the organic working medium of gaseous state is discharged from the outlet of decompressor 7, is imported in First Heat Exchanger 1 by the organic working medium gateway of the 3rd four-way valve 8 and First Heat Exchanger 1.Cold water heat exchange condensation in the organic working medium of gaseous state and First Heat Exchanger 1, converted back into liquid state.
So, by the switching of the first four-way valve 9 and the 3rd four-way valve 8, make First Heat Exchanger 1 and the second heat exchanger 3 alternately as vaporizer and condenser, make organic working medium reciprocal heat exchange in First Heat Exchanger 1 and the second heat exchanger 3, without the need to arranging high-pressure medium pump, save power consumption, namely add clean generating efficiency.
As shown in Figure 3, on the basis of above-mentioned first embodiment, the second four-way valve 2 and water pump 4, water pump 12 are set up.Cooling water after First Heat Exchanger 1 and the second heat exchanger 3 heat exchange and hot water by the second four-way valve 2 respectively correspondence send low-temperature receiver 5 back to and thermal source 11 carries out freezing and heating, achieve and be cycled to repeat utilization, save water source, water pump 4 and water pump 12 provide the power of circulation respectively for this reason.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (5)
1. utilize the organic working medium electricity generating device that low grade heat energy drives, it is characterized in that, comprising:
First Heat Exchanger and the second heat exchanger, carry out heat exchange by organic working medium to the liquid flowing through internal heat exchange tubes;
Low-temperature receiver and thermal source, respectively in order to provide cooling liquid or heating liquid;
First four-way valve, connects the heat exchanging tube of described First Heat Exchanger, the heat exchanging tube of the second heat exchanger, described low-temperature receiver and described thermal source respectively;
3rd four-way valve, connect the organic working medium gateway of described First Heat Exchanger, the organic working medium gateway of described second heat exchanger and the entrance and exit of a decompressor respectively, described decompressor connects a generator;
Wherein, by switching the on state of described first four-way valve and described 3rd four-way valve, described First Heat Exchanger is as vaporizer, described second heat exchanger is as condenser, or described First Heat Exchanger is as condenser, and described second heat exchanger is as vaporizer; The heat exchanging tube that heating liquid enters vaporizer by described first four-way valve carries out heat exchange, and the heat exchanging tube that cooling liquid enters condenser by described first four-way valve carries out heat exchange;
Organic working medium in vaporizer absorbs the heat in heating liquid, gaseous state is converted to gradually by liquid condition, and entered from the entrance of described decompressor by described 3rd four-way valve, after driving described decompressor work, discharge from the outlet of described decompressor, and enter condenser, the heat absorption of the cooling liquid in condenser by described 3rd four-way valve, the organic working medium converted back into liquid state gradually of gaseous state.
2. the organic working medium electricity generating device utilizing low grade heat energy to drive according to claim 1, is characterized in that, also comprise:
Second four-way valve, connect the heat exchanging tube of described First Heat Exchanger, the heat exchanging tube of the second heat exchanger, described low-temperature receiver and described thermal source respectively, the described heating liquid after heat exchange and described cooling liquid get back to described thermal source and described low-temperature receiver respectively by described second four-way valve.
3. the organic working medium electricity generating device utilizing low grade heat energy to drive according to claim 2, is characterized in that, the ingress of described thermal source and described low-temperature receiver comprises a water pump respectively.
4. the organic working medium electricity generating device utilizing low grade heat energy to drive according to claim 1, is characterized in that, described First Heat Exchanger and described second heat exchanger comprise one and fill mouth, in order to supplement described organic working medium.
5. the organic working medium electricity generating device utilizing low grade heat energy to drive according to claim 1, it is characterized in that, described organic working medium comprises refrigeration agent R245fa.
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| CN201410680177.0A CN104481615B (en) | 2014-11-25 | 2014-11-25 | A kind of organic working medium electricity generating device utilizing low grade heat energy to drive |
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| CN201410680177.0A CN104481615B (en) | 2014-11-25 | 2014-11-25 | A kind of organic working medium electricity generating device utilizing low grade heat energy to drive |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761988A (en) * | 2017-01-25 | 2017-05-31 | 东南大学 | A kind of single expanding machine realizes thermal energy step timesharing organic Rankine cycle devices and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305441A (en) * | 2011-03-30 | 2012-01-04 | 上海本家空调系统有限公司 | Air conditioner driven by using geothermal energy |
| CN104033199A (en) * | 2014-06-24 | 2014-09-10 | 天津大学 | Organic Rankine cycle system with built-in heat pump capable of utilizing mixed organic working media |
| CN104033200A (en) * | 2014-06-24 | 2014-09-10 | 天津大学 | Organic Rankine circulating system of internally-disposed heat pump using mixed organic working medium |
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2014
- 2014-11-25 CN CN201410680177.0A patent/CN104481615B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305441A (en) * | 2011-03-30 | 2012-01-04 | 上海本家空调系统有限公司 | Air conditioner driven by using geothermal energy |
| CN104033199A (en) * | 2014-06-24 | 2014-09-10 | 天津大学 | Organic Rankine cycle system with built-in heat pump capable of utilizing mixed organic working media |
| CN104033200A (en) * | 2014-06-24 | 2014-09-10 | 天津大学 | Organic Rankine circulating system of internally-disposed heat pump using mixed organic working medium |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761988A (en) * | 2017-01-25 | 2017-05-31 | 东南大学 | A kind of single expanding machine realizes thermal energy step timesharing organic Rankine cycle devices and method |
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Inventor after: Wang Liwei Inventor after: Gao Peng Inventor after: Jiang Long Inventor after: Song Fenping Inventor after: Zhou Zhisong Inventor before: Gao Peng Inventor before: Wang Liwei Inventor before: Jiang Long Inventor before: Song Fenping Inventor before: Zhou Zhisong |