A compressed fluid storage power generation device including a compressor and compressor bodies for compressing a working fluid; a pressure accumulation tank for storing the working fluid compressed by the compressor bodies; a power generator having expanders which are driven by the working fluid an
A compressed fluid storage power generation device including a compressor and compressor bodies for compressing a working fluid; a pressure accumulation tank for storing the working fluid compressed by the compressor bodies; a power generator having expanders which are driven by the working fluid and a power generator body which is driven by the expanders; high-temperature heat recovery units for recovering heat from the working fluid flowing from the compressor bodies into the pressure accumulation tank; high-temperature heating units for heating, with the recovered heat, the working fluid flowing from the pressure accumulation tank into the expanders; a low-temperature heat recovery unit for recovering heat generated in a low-temperature heat generation section of the compressor and/or power generator into a low-temperature heat carrier; and low-temperature heating units for heating the working fluid by means of heat exchange with the low-temperature heat carrier carrying the heat recovered by the low-temperature heat recovery unit.
대표청구항▼
1. A compressed fluid storage power generation device, comprising: a compressor having a drive source and a compressor main body for compressing a working fluid by being driven by the drive source;a pressure accumulation unit for storing the working fluid compressed by the compressor main body;a pow
1. A compressed fluid storage power generation device, comprising: a compressor having a drive source and a compressor main body for compressing a working fluid by being driven by the drive source;a pressure accumulation unit for storing the working fluid compressed by the compressor main body;a power generator having an expander driven by the working fluid supplied from the pressure accumulation unit and a power generator main body driven by the expander;a high-temperature heat recovery unit for recovering heat from the working fluid flowing from the compressor main body into the pressure accumulation unit;a high-temperature heating unit for heating the working fluid flowing from the pressure accumulation unit into the expander by the heat recovered by the high-temperature heat recovery unit;a low-temperature heat recovery unit for recovering heat generated in a low-temperature heat generation section in at least one of the compressor and the power generator to a low-temperature heat carrier; anda low-temperature heating unit for heating the working fluid by heat exchange with the low-temperature heat carrier conveying the heat recovered by the low-temperature heat recovery unit. 2. The compressed fluid storage power generation device according to claim 1, wherein the low-temperature heat carrier is at least one of oil and water. 3. The compressed fluid storage power generation device according to claim 1, wherein the low-temperature heat generation section includes a friction heat generation section. 4. The compressed fluid storage power generation device according to claim 3, wherein the friction heat generation section includes at least one of a bearing friction heat generation section and a gear friction heat generation section. 5. The compressed fluid storage power generation device according to claim 1, wherein: the drive source is an electric motor;the low-temperature heat generation section includes a casing of the electric motor; andthe low-temperature heat recovery unit includes a cooling jacket, which is provided in the casing of the electric motor and through which the low-temperature heat carrier flows. 6. The compressed fluid storage power generation device according to claim 1, wherein: the drive source is an electric motor having an inverter controlling a rotation speed;the low-temperature heat generation section includes a casing of the inverter; andthe low-temperature heat recovery unit includes a heat sink, which is provided in the casing of the inverter and through which the low-temperature heat carrier flows. 7. The compressed fluid storage power generation device according to claim 1, wherein: the low-temperature heat generation section includes a casing of the compressor main body; andthe low-temperature heat recovery unit includes a cooling jacket, which is provided in the casing of the compressor main body and through which the low-temperature heat carrier flows. 8. The compressed fluid storage power generation device according to claim 1, wherein: the low-temperature heat generation section includes a casing of the power generator main body; andthe low-temperature heat recovery unit includes a cooling jacket, which is provided in the casing of the power generator main body and through which the low-temperature heat carrier flows. 9. The compressed fluid storage power generation device according to claim 1, comprising a converter for converting power generated by the power generator main body and an inverter for reconverting the converted power, wherein: the low-temperature heat generation section includes at least one of a casing of the converter and a casing of the inverter; andthe low-temperature heat recovery unit includes a heat sink, which is provided in the casing and through which the low-temperature heat carrier flows. 10. The compressed fluid storage power generation device according to claim 1, wherein: the low-temperature heat generation section includes a casing of the expander; andthe low-temperature heat recovery unit includes a cooling jacket, which is provided in the casing of the expander and through which the low-temperature heat carrier flows. 11. The compressed fluid storage power generation device according to claim 1, wherein: the low-temperature heat generation section includes a working fluid passage, of a power generator side aftercooler, which is provided on a downstream side of the expander and through which the working fluid having passed through the expander flows; andthe low-temperature heat recovery unit includes a low-temperature heat carrier passage, which is provided in the power generator side aftercooler and through which the low-temperature heat carrier flows. 12. The compressed fluid storage power generation device according to claim 1, wherein: the compressor main body comprises a low-pressure stage compressor main body and a high-pressure stage compressor main body;the expander comprises a high-pressure stage expander and a low-pressure stage expander; andthe low-temperature heating unit comprises at least one of:a first low-temperature preheater, provided on an upstream of the low-pressure stage compressor main body, for heating the working fluid being sucked into the low-pressure stage compressor main body by heat exchange with the low-temperature heat carrier;a second low-temperature preheater, provided between the pressure accumulation unit and the high-pressure stage expander, for heating the working fluid by heat exchange with the low-temperature heat carrier; anda third low-temperature preheater, provided between the high-pressure stage expander and the low-pressure stage expander, for heating the working fluid by heat exchange with the low-temperature heat carrier. 13. The compressed fluid storage power generation device according to claim 12, comprising: an intercooler, provided between the low-pressure stage compressor main body and the high-pressure stage compressor main body, for recovering heat of the working fluid to a first high-temperature heat carrier; andan aftercooler, provided between the high-pressure stage compressor main body and the pressure accumulation unit, for recovering heat of the working fluid to a second high-temperature heat carrier, wherein the device further comprises:a first high-temperature heat accumulation unit for storing the first high-temperature heat carrier conveying the heat recovered from the working fluid by the intercooler;a second high-temperature heat accumulation unit for storing the second high-temperature heat carrier conveying the heat recovered from the working fluid by the aftercooler; anda low-temperature heat accumulation unit, provided between the low-temperature heat generation section and the low-temperature heating unit, for storing the low-temperature heat carrier. 14. The compressed fluid storage power generation device according to claim 13, comprising a first container for housing the first high-temperature heat accumulation unit, the second high-temperature heat accumulation unit, and the low-temperature heat accumulation unit. 15. The compressed fluid storage power generation device according to claim 14, comprising: a heat carrier return tank, provided on a path extending from the high-temperature heating unit to the first high-temperature heat accumulation unit and the second high-temperature heat accumulation unit, for storing the first high-temperature heat carrier and the second high-temperature heat carrier of which temperatures are decreased after heating the working fluid in the high-temperature heating unit; anda second container for housing the heat carrier return tank. 16. The compressed fluid storage power generation device according to claim 15, wherein the first container and the second container are a heat insulation container having an insulation material in its inside. 17. The compressed fluid storage power generation device according to claim 15, wherein the first container and the second container are configured to be a single container. 18. The container-type compressed fluid storage power generation device according to claim 17, wherein the single container comprises in its inside a partition by which the first high-temperature heat accumulation unit, the second high-temperature heat accumulation unit, and the low-temperature heat accumulation unit are housed separately from the heat carrier return tank. 19. The compressed fluid storage power generation device according to claim 13, comprising a sub-aftercooler provided between the aftercooler and the pressure accumulation unit. 20. The compressed fluid storage power generation device according to claim 1, wherein: the compressor main body is a positive displacement-type compressor main body; andthe expander is a positive displacement-type turbine. 21. The compressed fluid storage power generation device according to claim 20, wherein: the positive displacement-type compressor main body is an oil-free screw compressor main body; andthe positive displacement-type turbine is an oil-free screw turbine. 22. The compressed fluid storage power generation device according to claim 1, wherein: the compressor main body is a dynamic-type compressor main body; andthe expander is a positive displacement-type turbine. 23. The compressed fluid storage power generation device according to claim 1, wherein: the compressor main body is a positive displacement-type compressor main body; andthe expander is a dynamic-type turbine.
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이 특허에 인용된 특허 (5)
Nakhamkin, Michael, Advanced adiabatic compressed air energy storage system.
McBride, Troy O.; Bollinger, Benjamin R., Energy storage and recovery utilizing low-pressure thermal conditioning for heat exchange with high-pressure gas.
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