CN212406843U - Low-temperature waste heat simple power generation system adopting linear generator - Google Patents
Low-temperature waste heat simple power generation system adopting linear generator Download PDFInfo
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- CN212406843U CN212406843U CN202020990271.7U CN202020990271U CN212406843U CN 212406843 U CN212406843 U CN 212406843U CN 202020990271 U CN202020990271 U CN 202020990271U CN 212406843 U CN212406843 U CN 212406843U
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Abstract
The utility model discloses an adopt simple and convenient power generation system of low temperature used heat of linear generator, including the waste heat evaporimeter, piston expansion-linear generator system, condenser and reservoir, the working medium side export of waste heat evaporimeter is linked together with the working medium side entry of piston expansion-linear generator system, the working medium side export of piston expansion-linear generator system is linked together with the working medium side entry of condenser, the working medium side export of condenser is linked together with the entry of reservoir, the export of reservoir is linked together with the working medium side entry of waste heat evaporimeter, this system can utilize piston expansion-linear generator system to realize low temperature waste heat power generation.
Description
Technical Field
The utility model relates to a low temperature waste heat recovery power generation system, concretely relates to adopt linear generator's simple and convenient power generation system of low temperature used heat.
Background
Low temperature waste heat sources exist in large numbers in various aspects of industry such as electricity, chemical, metallurgical, processing, manufacturing, and the like. The form of waste heat is many, such as flue gas, waste water, cooling water, and the like. These heat sources have a large amount of heat, but are often difficult to use because of their low temperature, typically below 200 ℃. Although this heat can be used to heat by heat exchange, it is still wasted in summer when no heating is required. At present, some low-temperature waste heat recovery power generation devices exist, most common Organic Rankine Cycle (ORC) waste heat recovery power generation systems exist, and the systems have some problems at present, so that the systems are difficult to popularize and apply greatly. The main problems exist in that the low temperature of the heat source limits the efficiency of the ORC system, the low efficiency causes the cost of the ORC system to be very high, the investment recovery period of the system is very long, and many enterprises are not willing to adopt the system. The main reason is that on the one hand, waste heat sources tend to be not large in scale, often encounter heat sources in the order of hundreds kW or tens kW, for which the turbine size in the ORC system becomes smaller, otherwise high-speed motors with lower efficiency and higher cost must be used, under which conditions the efficiency of the ORC turbine tends to be not high, which further limits the profit margin for waste heat recovery power generation. Meanwhile, even if the turbine is designed at 3000rpm, the dynamic sealing of the rotating machine is a difficult problem in the ORC system, the conventional shaft sealing system cannot avoid 0 leakage, once leakage occurs, the leakage means economic loss of the organic working medium, and if a high-grade sealing system, such as dry gas sealing, is adopted, the cost increase makes the system face a greater challenge. On the other hand, the ORC systems currently use either radial or axial turbines, which are expensive to manufacture. Meanwhile, in order to ensure the normal work of the turbine, the inlet and the outlet of the turbine need to ensure relatively high pressure difference, the larger the pressure difference is, the larger the expansion ratio of the turbine is, the stronger the work-doing capability of the turbine is, and the higher the thermal efficiency of the system is, the more the system needs to adopt equipment such as a pump for pressurization. Therefore, a new technology with higher quality and lower cost is urgently needed to break the dilemma faced by the existing ORC system in the field of waste heat recovery power generation.
The linear generator is almost a generator form which is simultaneous with the rotary generator, and only the rotary generator is more suitable under the condition of high-speed movement, and then the linear generator is only adopted under special conditions. In recent years, attention has been paid to the development of new energy sources such as wave energy and the utilization of linear generators. The linear generator can keep higher efficiency under the relatively lower frequency movement condition, which cannot be realized by a rotary generator, and meanwhile, after the piston expansion-linear generator system is provided with acting parts such as a spring, a piston and the like, the piston expansion-linear generator system can generate electricity by utilizing airflow with very low pressure difference and very low temperature difference, which cannot be realized by a common turbine and a common generator. And such piston expansion-linear generator systems have been widely researched and applied. The characteristics of the piston expansion-linear generator system bring new opportunity for low-temperature waste heat power generation.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a low temperature used heat simple and convenient power generation system who adopts linear generator, this system can utilize piston inflation-linear generator system to realize low temperature waste heat power generation.
In order to achieve the above object, the low-temperature waste heat simple and convenient power generation system adopting the linear generator comprises a waste heat evaporator, a piston expansion-linear generator system, a condenser and a liquid storage device, wherein a working medium side outlet of the waste heat evaporator is communicated with a working medium side inlet of the piston expansion-linear generator system, the working medium side outlet of the piston expansion-linear generator system is communicated with a working medium side inlet of the condenser, a working medium side outlet of the condenser is communicated with an inlet of the liquid storage device, and an outlet of the liquid storage device is communicated with the working medium side inlet of the waste heat evaporator.
Working medium in the waste heat evaporator flows from bottom to top and is gradually evaporated into a gaseous state in the flowing process.
The working medium in the condenser flows from top to bottom and is cooled into liquid in the flowing process.
The utility model discloses following beneficial effect has:
adopt simple and convenient power generation system of low temperature used heat of linear generator, the working medium of piston expansion-linear generator system output is liquid from the top down entering into the condenser in the cooling, then enters into the reservoir, the liquid working medium of reservoir output evaporates for the gaseous state in entering into the waste heat evaporimeter from bottom to top gradually, then enters into the piston expansion-the electricity generation of acting in the linear generator system to reach the purpose that utilizes piston expansion-linear generator system to realize low temperature waste heat power generation. Meanwhile, as the motion frequency and the speed of the piston expansion-linear generator system are lower, the difficulty of shaft seal is greatly reduced, and a cheaper shaft seal form such as graphite can be adopted, so that the cost is greatly reduced.
Furthermore, the liquid level of the liquid working medium in the condenser is higher than the liquid level in the waste heat evaporator, and the pressure difference generated by the height difference provides the working medium flow and the pressure difference required by the piston expansion-linear generator system to do work, so that the system does not need to adopt equipment such as a pump and the like for pressurization, and the system is simplified to the greatest extent. Meanwhile, the pressure difference required by the power generation system is small, so that the pressure of the whole system can be low, the pressure grade of the system can be reduced, the adoption of cheaper materials and a processing and manufacturing process can be facilitated, and the cost of the system can be further reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a waste heat evaporator, 2 is a piston expansion-linear generator system, 3 is a condenser, and 4 is a liquid storage device.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the low-temperature waste heat simple power generation system adopting the linear generator comprises a waste heat evaporator 1, a piston expansion-linear generator system 2, a condenser and a liquid storage device 4, wherein a working medium side outlet of the waste heat evaporator 1 is communicated with a working medium side inlet of the piston expansion-linear generator system 2, a working medium side outlet of the piston expansion-linear generator system 2 is communicated with a working medium side inlet of the condenser 3, a working medium side outlet of the condenser 3 is communicated with an inlet of the liquid storage device 4, and an outlet of the liquid storage device 4 is communicated with a working medium side inlet of the waste heat evaporator 1.
The working medium in the waste heat evaporator 1 flows from bottom to top and is gradually evaporated into a gaseous state in the flowing process; the working medium in the condenser 3 flows from top to bottom and is cooled into liquid in the flowing process.
Working media output by the piston expansion-linear generator system 2 enter the condenser 3 from top to bottom to be cooled into liquid, then enter the liquid storage device 4, liquid working media output by the liquid storage device 4 enter the waste heat evaporator 1 from bottom to top to be gradually evaporated into gas, and then enter the piston expansion-linear generator system 2 to do work and generate power.
The liquid level of the liquid working medium in the condenser 3 is higher than the liquid level in the waste heat evaporator 1, and the pressure difference generated by the height difference provides the working medium flow and the pressure difference required by the piston expansion-linear generator system 2 to do work, so that the system does not need to adopt equipment such as a pump and the like for pressurization, and the system is simplified to the greatest extent. Meanwhile, as the motion frequency and the speed of the piston expansion-linear generator system 2 are lower, the difficulty of shaft seal is greatly reduced, and a cheaper shaft seal form such as graphite can be adopted, so that the cost is greatly reduced. Meanwhile, the pressure difference required by the power generation system is small, so that the pressure of the whole system can be low, the pressure grade of the system can be reduced, the adoption of cheaper materials and a processing and manufacturing process can be facilitated, and the cost of the system can be further reduced.
Claims (3)
1. The utility model provides an adopt simple and convenient power generation system of low temperature used heat of linear generator, a serial communication port, including waste heat evaporimeter (1), piston expansion-linear generator system (2), condenser (3) and reservoir (4), the working medium side outlet of waste heat evaporimeter (1) is linked together with the working medium side entry of piston expansion-linear generator system (2), the working medium side outlet of piston expansion-linear generator system (2) is linked together with the working medium side entry of condenser (3), the working medium side outlet of condenser (3) is linked together with the entry of reservoir (4), the export of reservoir (4) is linked together with the working medium side entry of waste heat evaporimeter (1).
2. The simple low-temperature waste heat power generation system adopting the linear generator as claimed in claim 1, wherein the working medium in the waste heat evaporator (1) flows from bottom to top and gradually evaporates into a gaseous state in the flowing process.
3. The low-temperature waste heat simple power generation system adopting the linear generator as claimed in claim 1, wherein the working medium in the condenser (3) flows from top to bottom and is cooled to be liquid in the flowing process.
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| CN202020990271.7U CN212406843U (en) | 2020-06-02 | 2020-06-02 | Low-temperature waste heat simple power generation system adopting linear generator |
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| CN202020990271.7U CN212406843U (en) | 2020-06-02 | 2020-06-02 | Low-temperature waste heat simple power generation system adopting linear generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111535892A (en) * | 2020-06-02 | 2020-08-14 | 西安热工研究院有限公司 | Low-temperature waste heat simple power generation system and method adopting linear generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111535892A (en) * | 2020-06-02 | 2020-08-14 | 西安热工研究院有限公司 | Low-temperature waste heat simple power generation system and method adopting linear generator |
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