Patent Application
20220228512
The present invention belongs to the flied of energy and power technology.
Cold demand, heat demand and power demand are common in human life and production. It is an important way to obtain and provide power by the conversion of thermal energy into mechanical energy. In general, the temperature of heat source reduces and varies with the release of heat. When fossil fuels are used as the primary energy, the heat source has the dual characteristics of both high-temperature and variable temperature. This makes it is difficult to transform more heat energy into mechanical energy using the power device based on a single thermal cycle. For high-quality fuel, the traditional gas-steam combined cycle can be used to obtain a high thermal efficiency. However, there are still some problems to be solved, such as high cost, large investment and low thermal efficiency to be improved.
Take the vapor power device with the outside combustion for example, its heat source has the dual characteristics of high-temperature and variable temperature. For those vapor power devices based on the Rankine cycle, the material's temperature resistance and pressure resistance abilities and safety concerns limit the parameters of the cycle's working medium. Therefore, there is a big temperature difference between the working medium and the heat source, which leads to big irreversible loss and low efficiency. This means that there is great potential to improve the thermal efficiency.
Humans need to use heat energy simply, actively, efficiently for achieving power. Therefore, the present invention provides a combined cycle power device with high thermal efficiency, strong safety, adaptation to high-temperature heat source or variable temperature heat source and response to various fuels.
The combined cycle power device are mainly provided in the present invention, and the specific contents of the present invention are as follows:
In the figures, 1—expander, 2—compressor, 3—the second expander, 4—circulating pump, 5—high temperature heat exchanger, 6—condenser, 7—evaporator (waste heat boiler), 8—heating unit, 9—high temperature regenerator, 10—the second high-temperature heat exchanger, 11—the third expander, 12—the second compressor, 13—low temperature regenerator, 14—the second pump.
The first thing to note is that, when describing the cycle's structures and processes, the processes will not be repeatedly described if not necessary, and the obvious processes will not be described. The detailed description of the present invention is as follows:
The combined cycle power device in
(1) Device structure. The combined cycle power device comprises an expander, a compressor, a second expander, a pump, a high-temperature heat exchanger, a condenser and an evaporator. A condenser 6 has a liquid refrigerant pipe which passes through a pump 4 and connects the evaporator 7, an evaporator 7 has a vapor channel connected a high-temperature heat exchanger 5, the high-temperature heat exchanger 5 has a vapor channel connected a compressor 1, a compressor 1 has a low-pressure vapor channel connected the evaporator 7, an evaporator 7 has a low-pressure vapor channel connected the compressor 2 and the second expander 3 respectively, the second expander 3 has a low-pressure vapor channel connected the condenser 6. The high-temperature heat exchanger 5 has the heat source medium channel connected the outside, the condenser 6 has the cooling medium channel connected the outside, the expander 1 and the second the expander 3 connect the compressor 2 and transmit power.
(2) Working processes. The condensate of the condenser 6 flows through the pump 4 and enters into the evaporator 7 in which it absorbs heat, vaporizes and superheats, and then enters the high-temperature heat exchanger 5 for heat absorption, The vapor discharged from compressor 2 enters the high-temperature heat exchanger 5 for heat absorption. The vapor discharged from the high-temperature heat exchanger 5 flows through the expander 1 to depressurize and output work. The low-pressure vapor discharged from the expander 1 flows through the evaporator 7 to release heat and cool down, and then is divided into two currents. The first current enters the compressor 2 for pressure rise and temperature rise. The second current flows through the expander 3 to depressurize and output work, and then enters the condenser 6 to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger 5. The cooling medium takes away the low-temperature heat load through the condenser 6. The expander 1 and the second expander 3 supplies power to the compressor 1 and the outside. The expander 1 and the second expander 3 supplies power to the compressor 2, the pump 4 and the outside if necessary. The combined cycle power device is formed.
The combined cycle power device in
Based on combined cycle power device in
The combined cycle power device in
(1) Device structure. The combined cycle power device comprises an expander, a compressor, a second expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator and a heating unit. A condenser 6 has a liquid refrigerant pipe which passes through a pump 4 and connects the evaporator 7, an evaporator 7 has a vapor channel connected a high-temperature heat exchanger 5, a compressor 2 has a vapor channel connected the high-temperature heat exchanger 5, the high-temperature heat exchanger 5 has a vapor channel connected an expander 1, an expander 1 has a low-pressure vapor channel connected the heating unit 8, the heating unit 8 has a low-pressure vapor channel connected the compressor 2 and the second expander 3 respectively, the second expander 3 has a low-pressure vapor channel connected the condenser 6. The high-temperature heat exchanger 5 has the heat source medium connected the outside, the condenser 6 has the cooling medium channel connected the outside, the evaporator 7 has the heat source medium channel connected the outside, the heating unit 8 has the heated medium channel connected the outside, the expander 1 and the second the expander 3 connect the compressor 2 and transmit power.
(2) Working processes. The condensate of the condenser 6 flows through the pump 4 and enters into the evaporator 7 in which it absorbs heat, vaporizes and superheats, and then enters the high-temperature heat exchanger 5 for heat absorption. The vapor discharged from compressor 2 enters the high-temperature heat exchanger 5 for heat absorption. The vapor discharged from the high-temperature heat exchanger 5 flows through the expander 1 to depressurize and output work. The low-pressure vapor discharged from the expander 1 flows through the heating unit 8 to release heat and cool down, and then is divided into two currents. The first current enters the compressor 2 for pressure rise and temperature rise. The second current flows through the second expander 3 to depressurize and output work, and then enters the condenser 6 to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger 5 and the evaporator 7. The cooling medium takes away the low-temperature heat load through the condenser 6. The heated medium takes away the medium temperature heat load through the heating unit 8. The expander 1 and the second expander 3 supplies power to the compressor 2 and the outside. Or the expander 1 and the second expander 3 supplies power to the compressor 2, the pump 4 and the outside if necessary. The combined cycle power device is formed.
The combined cycle power device in
(1) Device structure. The combined cycle power device comprises an expander, a compressor, a second expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator and a high-temperature regenerator. An condenser 6 has a liquid refrigerant pipe which passes through a pump 4 and connects the evaporator 7, an evaporator 7 has a low-pressure vapor channel which passes through a high-temperature regenerator 9 and connects the high-temperature heat exchanger 5, a compressor 2 has a vapor channel which passes through the high-temperature regenerator 9 and connects the high-temperature heat exchanger 5, the high-temperature heat exchanger 5 has a vapor channel connected the expander 1, the expander 1 has a low-pressure vapor channel connected the high-temperature regenerator 9. The high-temperature regenerator 9 has the heat source medium connected the evaporator 7, an evaporator 7 has a low-pressure vapor channel connected the compressor 2 and the second expander 3 respectively, the second expander 3 has a low-pressure vapor channel connected the condenser 6. The high-temperature heat exchanger 5 has the heat source medium channels connected the outside, the condenser 6 has the cooling medium channel connected the outside, the expander 1 and the second the expander 3 connect the compressor 2 and transmit power.
(2) Working processes. The condensate of the condenser 6 flows through the pump 4 and enters into the evaporator 7 in which it absorbs heat, vaporizes and superheats. The superheated vapor flows through the high-temperature regenerator 9 for heat absorption, and then enters the high-temperature heat exchanger 5 for heat absorption. The vapor discharged from compressor 2 flows through the high-temperature regenerator 9 for heat absorption, and then enters the high-temperature heat exchanger 5 for heat absorption. The vapor discharged from the high-temperature heat exchanger 5 flows through the expander 1 to depressurize and output work. The low-pressure vapor discharged from the expander 1 flows through the high-temperature regenerator 9 and the evaporator 7 to release heat and cool down, and then is divided into two currents. The first current enters the compressor 2 for pressure rise and temperature rise. The second current flows through the second expander 3 to depressurize and output work, and then enters the condenser 6 to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger 5. The cooling medium takes away the low-temperature heat load through the condenser 6. The expander 1 and the second expander 3 supplies power to the compressor 2 and the outside. Or the expander 1 and the second expander 3 supplies power to the compressor 2, the pump 4 and the outside if necessary. The combined cycle power device is formed.
The combined cycle power device in
(1) Device structure. The combined cycle power device comprises an expander, a compressor, a second expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator and the second high-temperature heat exchanger. The condenser 6 has a liquid refrigerant pipe which passes through a pump 4 and connects the evaporator 7), an evaporator 7 has a vapor channel connects the second high-temperature heat exchanger 10, the second high-temperature heat exchanger 10 has a vapor channel connects an expander 1, a compressor 2 has a vapor channel connects the high-temperature heat exchanger 5, the high-temperature heat exchanger 5 has a vapor channel which passes through a intermediate vapor inlet channel and connects the expander 1, the expander 1 has a low-pressure vapor channel connected the evaporator 7, the evaporator 7 has a low-pressure vapor channel connected the compressor 2 and a second expander 3 respectively, the second expander 3 has a low-pressure vapor channel connected the condenser 6. The high-temperature heat exchanger 5 and the second high-temperature heat exchanger 10 have the heat source medium channels connected the outside, the condenser 6 has the cooling medium channel connected the outside, the expander 1 and the second expander 3 connect the compressor (2) and transmit power.
(2) Working processes. The condensate of the condenser 6 flows through the pump 4, the evaporator 7 and the second high-temperature heat exchanger 10 and absorbs heat, vaporizes and superheats, and then enters the expander 1 to depressurize and output work. The vapor discharged from compressor 2 flows through the high-temperature heat exchanger 5 for heat absorption, and then enters the expander 1 to depressurize and output work. The low-pressure vapor discharged from the expander 1 flows through the evaporator 7 to release heat and cool down, and then is divided into two currents. The first current enters the compressor 2 for pressure rise and temperature rise. The second current flows through the second expander 3 to depressurize and output work, and then enters the condenser 6 to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger 5 and the second high-temperature heat exchanger 10. The cooling medium takes away the low-temperature heat load through the condenser 6. The expander 1 and the second expander 3 supplies power to the compressor 2 and the outside. Or the expander 1 and the second expander 3 supplies power to the compressor 2, the pump 4 and the outside if necessary. The combined cycle power device is formed.
The combined cycle power device in
(1) Device structure. The combined cycle power device comprises an expander, a compressor, a second expander, a pump, a high-temperature heat exchanger, a condenser and an evaporator. The condenser 6 has a liquid refrigerant pipe which passes through a pump 4 and connects the evaporator 7, an evaporator 7 has a vapor channel which passes through a intermediate vapor inlet channel and connects an expander 1, a compressor 2 has a vapor channel which passes through a high-temperature heat exchanger 5 and connects the expander 1, the expander 1 has a low-pressure vapor channel connected the evaporator 7, the evaporator 7 has a low-pressure vapor channel connected the compressor 2 and the second expander 3 respectively, the second expander 3 has a low-pressure vapor channel connected the condenser 6. The high-temperature heat exchanger 5 has the heat source medium channel connected the outside, the condenser 6 has the cooling medium channel connected the outside, the expander 1 and the second expander 3 connect the second compressor 2 and transmit power.
(2) Working processes. The condensate of the condenser 6 flows through the pump 4 and enters the evaporator 7 in which it absorbs heat, vaporizes and superheats, and then enters the expander 1 to depressurize and output work. The vapor discharged from compressor 2 flows through the high-temperature heat exchanger 5 for heat absorption, and then enters the expander 1 to depressurize and output work. The low-pressure vapor discharged from the expander 1 flows through the evaporator 7 to release heat and cool down, and then is divided into two currents. The first current enters the compressor 2 for pressure rise and temperature rise. The second current flows through the second expander 3 to depressurize and output work, and then enters the condenser 6 to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger 5. The cooling medium takes away the low-temperature heat load through the condenser 6. The expander 1 and the second expander 3 supplies power to the compressor 2 and the outside. Or the expander 1 and the second expander 3 supplies power to the compressor 2, the pump 4 and the outside if necessary. The combined cycle power device is formed.
The combined cycle power device in
(1) Device structure. The combined cycle power device comprises an expander, a compressor, a second expander, a pump, a high-temperature heat exchanger, a condenser and a high-temperature regenerator. The condenser 6 has a liquid refrigerant pipe which passes through a pump 4 and connects the evaporator 7, an evaporator 7 has a vapor channel which passes through a intermediate vapor inlet channel and connects an expander 1, a compressor 2 has a vapor channel which passes through a high-temperature regenerator 9 and a high-temperature heat exchanger 5, connects the expander 1, the expander 1 has a low-pressure vapor channel connected the high-temperature regenerator 9, the high-temperature regenerator 9 has a low-pressure vapor channel connected the evaporator 7, the evaporator 7 has a low-pressure vapor channel connected the compressor 2 and the second expander 3 respectively, the second expander 3 has a low-pressure vapor channel connected the condenser 6. The high-temperature heat exchanger 5 has the heat source medium channel connected the outside, the condenser 6 has the cooling medium channel connected the outside, the expander 1 and the second expander 3 connect the second compressor 2 and transmit power.
(2) Working processes. The condensate of the condenser 6 flows through the pump 4 and enters the evaporator 7 in which it absorbs heat, vaporizes and superheats, and then enters the expander 1 to depressurize and output work. The vapor discharged from compressor 2 flows through the high-temperature regenerator 9 and the high-temperature heat exchanger 5 for heat absorption, and then enters the expander 2 to depressurize and output work. The low-pressure vapor discharged from the expander 1 flows through the high-temperature regenerator 9 and the evaporator 7 to release heat and cool down, and then is divided into two currents. The first current enters the compressor 2 for pressure rise and temperature rise. The second current flows through the second expander 3 to depressurize and output work, and then enters the condenser 6 to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger 5. The cooling medium takes away the low-temperature heat load through the condenser 6. The expander 1 and the second expander 3 supplies power to the compressor 2 and the outside. Or the expander 1 and the second expander 3 supplies power to the compressor 2, the pump 4 and the outside if necessary. The combined cycle power device is formed.
The combined cycle power device in
(1) Device structure. The combined cycle power device comprises an expander, a compressor, a second expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator and a third expander. The condenser 6 has a liquid refrigerant pipe which passes through a pump 4 and connects the evaporator 7, an evaporator 7 has a vapor channel connects the third expander 11, the expander 11 has a low-pressure vapor channel connected the evaporator 7, a compressor 2 has a vapor channel which passes through a high-temperature heat exchanger 5 and the expander 1, the expander 1 has a low-pressure vapor channel connected the evaporator 7, the evaporator 7 has a low-pressure vapor channel connected the compressor 2 and the second expander 3 respectively, the second expander 3 has a low-pressure vapor channel connected the condenser 6. The high-temperature heat exchanger 5 has the heat source medium channel connected the outside, the condenser 6 has the cooling medium channel connected the outside, the evaporator 7 has the heat source medium channel connected the outside if necessary, the expander 1, the second expander 3 and the third expander 11 connect the second compressor 2 and transmit power.
(2) Working processes. The condensate of the condenser 6 flows through the pump 4 and enters the evaporator 7 in which it absorbs heat, vaporizes and superheats, and then enters the third expander 11 to depressurize and output work. The low-pressure vapor discharged from the third expander 11 enters the evaporator 7 to release heat and cool down. The vapor discharged from the compressor 2 flows through the high-temperature heat exchanger 5 for heat absorption, and then enters the expander 1 to depressurize and output work. The low-pressure vapor discharged from the expander 1 enters the evaporator 7 to release heat and cool down, and then is divided into two currents. The first current enters the compressor 2 for pressure rise and temperature rise. The second current flows through the second expander 3 to depressurize and output work, and then enters the condenser 6 to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger 5 and the evaporator 7. The cooling medium takes away the low-temperature heat load through the condenser 6. The expander 1, the second expander 3 and third expander 11 supply power to the compressor 2 and the outside. Or the expander 1, the second expander 3 and third expander 11 supplies power to the compressor 2, the pump 4 and the outside if necessary. The combined cycle power device is formed.
The combined cycle power device in
(1) Device structure. The combined cycle power device comprises an expander, a compressor, a second expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator and a heating unit. The condenser 6 has a liquid refrigerant pipe which passes through a pump 4 and connects the evaporator 7, an evaporator 7 has a vapor channel connects the high-temperature heat exchanger 5, a compressor 2 has a vapor channel connects the high-temperature heat exchanger 5, the high-temperature heat exchanger 5 has a vapor channel connected the expander 1, the expander 1 has a low-pressure vapor channel connected the evaporator 7, an evaporator 7 has a low-pressure vapor channel and connects the heating unit 8, the heating unit 8 has a low-pressure vapor channel and connects the compressor 2 and the second expander 3) respectively, the second expander 3 has a low-pressure vapor channel connected the condenser 6. The high-temperature heat exchanger 5 has the heat source medium channel connected the outside, the condenser 6 has the cooling medium channel connected the outside, the heating unit 8 has the heated medium channel connected the outside, the expander 1 and the second expander 3 connect the second compressor 2 and transmit power.
(2) Working processes. The condensate of the condenser 6 flows through the pump 4 and enters the evaporator 7 in which it absorbs heat, vaporizes and superheats, and then enters the high-temperature heat exchanger 5 for heat absorption. The vapor discharged from compressor 2 enters the high-temperature heat exchanger 5 for heat absorption. The vapor discharged from the high-temperature heat exchanger 5 flows through the expander 1 to depressurize and output work. The low-pressure vapor discharged from the expander 1 flows through the evaporator 7 and heating unit 8 to release heat and cool down, and then is divided into two currents. The first current enters the compressor 2 for pressure rise and temperature rise. The second current flows through the second expander 3 to depressurize and output work, and then enters the condenser 6 to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger 5. The cooling medium takes away the low-temperature heat load through the condenser 6. The heated medium takes away the medium temperature heat load through the heating unit 8. The expander 1 and the second expander 3 supply power to the compressor 2 and the outside. Or the expander 1 and the second expander 3 supply power to the compressor 2, the pump 4 and the outside if necessary. The combined cycle power device is formed.
The combined cycle power device in
(1) Device structure. The combined cycle power device comprises an expander, a compressor, a second expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator, a second high-temperature heat exchanger and a second compressor. The condenser 6 has a liquid refrigerant pipe which passes through a pump 4 and connects the evaporator 7, an evaporator 7 has a vapor channel connects the high-temperature heat exchanger 5, the compressor 2 has a vapor channel connects the high-temperature heat exchanger 5, the high-temperature heat exchanger 5 has a vapor channel connected the second compressor 12, the second compressor 12 has a vapor channel which passes through a second high-temperature heat exchanger 10 and connects the expander 1, the expander 1 has a low-pressure vapor channel connected the evaporator 7, an evaporator 7 has a low-pressure vapor channel and connects the compressor 2 and the second expander 3 respectively, the second expander 3 has a low-pressure vapor channel connected the condenser 6. The high-temperature heat exchanger 5 and the second high-temperature heat exchanger 10 has the heat source medium channel connected the outside respectively, the condenser 6 has the cooling medium channel connected the outside, the expander 1 and the second expander 3 connect the second compressor 2 and transmit power.
(2) Working processes. The condensate of the condenser 6 flows through the pump 4 and enters the evaporator 7 in which it absorbs heat, vaporizes and superheats, and then enters the high-temperature heat exchanger 5 for heat absorption. The vapor discharged from compressor 2 enters the high-temperature heat exchanger 5 for heat absorption. The vapor discharged from the high-temperature heat exchanger 5 flows through the second compressor 12 to pressurize, the second high-temperature heat exchanger 10 for heat absorption and the expander 2 to depressurize and output work. The low-pressure vapor discharged from the expander 1 flows through the evaporator 7 to release heat and cool down, and then is divided into two currents. The first current enters the compressor 2 for pressure rise and temperature rise. The second current flows through the second expander 3 to depressurize and output work, and then enters the condenser 6 to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger 5 and the second high-temperature heat exchanger 10. The cooling medium takes away the low-temperature heat load through the condenser 6. The expander 1 and the second expander 3 supply power to the compressor 2, the second compressor 12 and the outside. Or the expander 1 and the second expander 3 supply power to the compressor 2, the second compressor 12, the pump 4 and the outside if necessary. The combined cycle power device is formed.
The combined cycle power device in
(1) Device structure. The combined cycle power device comprises an expander, a compressor, a second expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator, a second high-temperature heat exchanger and a third expander. The condenser 6 has a liquid refrigerant pipe which passes through a pump 4 and connects the evaporator 7, an evaporator 7 has a vapor channel connects the high-temperature heat exchanger 5, the compressor 2 has a vapor channel connects the high-temperature heat exchanger 5, the high-temperature heat exchanger 5 has a vapor channel connected the third expander 11, the third expander 11 has a vapor channel which passes through a second high-temperature heat exchanger 10 connects the expander 1, the expander 1 has a low-pressure vapor channel connected the evaporator 7, an evaporator 7 has a low-pressure vapor channel and connects the compressor 2 and the second expander 3 respectively, the second expander 3 has a low-pressure vapor channel connected the condenser 6. The high-temperature heat exchanger 5 and the second high-temperature heat exchanger 10 has the heat source medium channel connected the outside respectively, the condenser 6 has the cooling medium channel connected the outside, the expander 1, the second expander 3 and the third expander 11 connect the second compressor 2 and transmit power.
(2) Working processes. The condensate of the condenser 6 flows through the pump 4 and enters the evaporator 7 in which it absorbs heat, vaporizes and superheats, and then enters the high-temperature heat exchanger 5 for heat absorption. The vapor discharged from compressor 2 enters the high-temperature heat exchanger 5 for heat absorption. The vapor discharged from the high-temperature heat exchanger 5 flows through the third expander 11 to depressurize and output work, the second high-temperature heat exchanger 10 for heat absorption and the expander 1 to depressurize and output work. The low-pressure vapor discharged from the expander 1 flows through the evaporator 7 to release heat and cool down, and then is divided into two currents. The first current enters the compressor 2 for pressure rise and temperature rise. The second current flows through the second expander 3 to depressurize and output work, and then enters the condenser 6 to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger 5 and the second high-temperature heat exchanger 10. The cooling medium takes away the low-temperature heat load through the condenser 6. The expander 1, the second expander 3 and the third expander 11 supply power to the compressor 2 and the outside. The expander 1, the second expander 3 and the third expander 11 supply power to the compressor 2, the pump 4 and the outside if necessary. The combined cycle power device is formed.
The combined cycle power device in
(1) Device structure. The combined cycle power device comprises an expander, a compressor, a second expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator, a high-temperature regenerator, a second high-temperature heat exchanger and a second compressor. The condenser 6 has a liquid refrigerant pipe which passes through a pump 4 and connects the evaporator 7, an evaporator 7 has a vapor channel which passes through the high-temperature regenerator 9 and connects the high-temperature heat exchanger 5, a compressor 2 has a vapor channel which passes through a high-temperature regenerator 9 and the high-temperature heat exchanger 5, The high-temperature heat exchanger 5 has a vapor channel connects the second compressor 12, the second compressor 12 has a liquid refrigerant pipe which passes through second high-temperature heat exchanger 10 and connects the expander 1, the expander 1 has a low-pressure vapor channel which passes through a high-temperature regenerator 9 and connects the evaporator 7, an evaporator 7 has a low-pressure vapor channel and connects the compressor 2 and the second expander 3 respectively, the second expander 3 has a low-pressure vapor channel connected the condenser 6. The high-temperature heat exchanger 5 and the second high-temperature heat exchanger 10 has the heat source medium channel connected the outside respectively, the condenser 6 has the cooling medium channel connected the outside, the expander 1, the second expander 3 connect the compressor 2 and the second compressor 12, transmit power.
(2) Working processes. The condensate of the condenser 6 flows through the pump 4 and enters the evaporator 7 in which it absorbs heat, vaporizes and superheats. The superheated vapor flows through the high-temperature regenerator 9 for heat absorption, and then enters the high-temperature heat exchanger 5 for heat absorption. The vapor discharged from compressor 2 flows through the high-temperature regenerator 9 for heat absorption, and then enters the high-temperature heat exchanger 5 for heat absorption. The vapor discharged from the high-temperature heat exchanger 5 flows through the second compressor 12 to pressurize, the second high-temperature heat exchanger 10 for heat absorption and the expander 1 to depressurize and output work. The low-pressure vapor discharged from the expander 1 flows through the high-temperature regenerator 9 and the evaporator 7 to release heat and cool down, and then is divided into two currents. The first current enters the compressor 2 for pressure rise and temperature rise. The second current flows through the second expander 3 to depressurize and output work, and then enters the condenser 6 to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger 5 and the second high-temperature heat exchanger 10. The cooling medium takes away the low-temperature heat load through the condenser 6. The expander 2 and the second expander 3 supplies power to the compressor 2, the second compressor 12 and the outside. The expander 2 and the second expander 3 supplies power to the compressor 2, the pump 4, the second compressor 12 and the outside if necessary. The combined cycle power device is formed.
The combined cycle power device in
(1) Device structure. The combined cycle power device comprises an expander, a compressor, a second expander, a pump, a high-temperature heat exchanger, a condenser, an evaporator, a high-temperature regenerator, a second high-temperature heat exchanger and a third expander. The condenser 6 has a liquid refrigerant pipe which passes through a pump 4 and connects the evaporator 7, an evaporator 7 has a vapor channel which passes through the high-temperature regenerator 9 and connects the high-temperature heat exchanger 5, the high-temperature heat exchanger 5 has a vapor channel and connects the third expander 11, the third expander 11 has a vapor channel which passes through the second high-temperature heat exchanger 10 and connects the third expander 1, the third expander 1 has a low-pressure vapor channel which passes through the second high-temperature regenerator 9 and connects the evaporator 7, an evaporator 7 has a low-pressure vapor channel and connects the compressor 2 and the second expander 3 respectively, the second expander 3 has a low-pressure vapor channel connected the condenser 6. The high-temperature heat exchanger 5 and the second high-temperature heat exchanger 10 have the heat source medium channel connected the outside respectively, the condenser 6 has the cooling medium channel connected the outside, the expander 1, the second expander 3 and the third expander 11 connect the compressor 2 and transmit power.
(2) Working processes. The condensate of the condenser 6 flows through the pump 4 and enters the evaporator 7 in which it absorbs heat, vaporizes and superheats. The superheated vapor flows through the high-temperature regenerator 9 for heat absorption, and then enters the high-temperature heat exchanger 5 for heat absorption. The vapor discharged from compressor 2 flows through the high-temperature regenerator 9 for heat absorption, and then enters the high-temperature heat exchanger 5 for heat absorption. The vapor discharged from the high-temperature heat exchanger 5 flows through the third expander 11 to depressurize and output work, the second high-temperature heat exchanger 10 for heat absorption and the expander 1 to depressurize and output work. The low-pressure vapor discharged from the expander 1 flows through the high-temperature regenerator 9 and the evaporator 7 to release heat and cool down, and then is divided into two currents. The first current enters the compressor 2 for pressure rise and temperature rise. The second current flows through the second expander 3 to depressurize and output work, and then enters the condenser 6 to release heat and condense. The heat source medium supplies the driving heat load through the high-temperature heat exchanger 5 and the second high-temperature heat exchanger 10. The cooling medium takes away the low-temperature heat load through the condenser 6. The expander 1, the second expander 3 and the third expander 11 supply power to the compressor and the outside. Or the expander 1, the second expander 3 and the third expander 11 supply power to the compressor 2, the pump 4 and the outside if necessary. The combined cycle power device is formed.
The combined cycle power device in
(1) Structurally, based on combined cycle power device in
(2) Working processes. The condensate of the condenser 6 flows through the pump 4 and enters the low temperature regenerator 13 in which it mixes with the vapor extraction from the compressor 2 for heat absorption. The vapor extraction releases and is condensed. The condensate of the low temperature regenerator 13 flows through the second pump 14 and enters the evaporator 7 in which it absorbs heat, vaporizes and superheats, and then enters the high-temperature heat exchanger 5 for heat absorption. The vapor discharged from compressor 2 enters the high-temperature heat exchanger 5 for heat absorption. The vapor discharged from the high-temperature heat exchanger 5 flows through the expander 1 to depressurize and output work. The low-pressure vapor discharged from the expander 1 flows through the evaporator 7 to release heat and cool down, and then is divided into two currents. The first current enters the compressor 2 for pressure rise and temperature rise. The second current flows through the second expander 3 to depressurize and output work, and then enters the condenser 6 to release heat and condense. The low-pressure vapor entering the compressor 2 is compressed to the certain extent and then divided into two currents. The first current enters the low temperature regenerator 13 by the intermediate extraction channel. The second current continues to boost pressure and temperature. The heat source medium supplies the driving heat load through the high-temperature heat exchanger 5. The cooling medium takes away the low-temperature heat load through the condenser 6. The expander 1 and the second expander 3 supplies power to the compressor 2 and the outside. Or the expander 1 and the second expander 3 supplies power to the compressor 2, the pump 4, the second pump 13 and the outside if necessary. The combined cycle power device is formed.
The combined cycle power device in
(1) Structurally, based on combined cycle power device in
(2) Working processes. The condensate of the condenser 6 flows through the pump 4 and enters the low temperature regenerator 13 in which it mixes with the vapor extraction from the compressor 2 for heat absorption. The vapor extraction releases and is condensed. The condensate of the low temperature regenerator 13 flows through the second pump 14 and enters the evaporator 7 in which it absorbs heat, vaporizes and superheats, and then enters the high-temperature heat exchanger 5 for heat absorption. The vapor discharged from compressor 2 enters the high-temperature heat exchanger 5 for heat absorption. The vapor discharged from the high-temperature heat exchanger 5 flows through the expander 1 to depressurize and output work. The low-pressure vapor discharged from the expander 1 flows through the heating unit 8 to release heat and cool down, and then is divided into two currents. The first current enters the compressor 2 for pressure rise and temperature rise. The second current flows through the second expander 3 to depressurize and output work, and then enters the condenser 6 to release heat and condense. The low-pressure vapor entering the compressor 2 is compressed to the certain extent and then divided into two currents. The first current enters the low temperature regenerator 13 by the intermediate extraction channel. The second current continues to boost pressure and temperature. The heat source medium supplies the driving heat load through the high-temperature heat exchanger 5 and the evaporator 7. The cooling medium takes away the low-temperature heat load through the condenser 6. The heated medium takes away the medium temperature heat load through the heating unit 8. The expander 1 and the second expander 3 supplies power to the compressor 2 and the outside. Or the expander 1 and the second expander 3 supplies power to the compressor 2, the pump 4, the second pump 13 and the outside if necessary. The combined cycle power device is formed.
The technical effects of the present invention: the combined cycle power device proposed by the present invention has the following effects and advantages:
(1) The circulating working medium absorbs heat at high-temperature heat under low pressure. The temperature difference loss between the circulating working medium and the high-temperature heat source is small, which is conducive to improving the thermal efficiency of the system and the safety of the device.
(2) The circulating working medium mainly relies on the condensation phase transformation process to realize low temperature heat release. The temperature difference loss between the circulating working medium and the environment is controllable, which is conducive to improving the thermal efficiency.
(3) The present invention adopts the low-pressure and high-temperature operation mode to work in the high-temperature region. Therefore, the contradiction among thermal efficiency, the working medium's parameters and the material's temperature resistance and pressure resistance abilities, which is common in traditional vapor power devices, can be resolved. The temperature difference loss between the heat source and the circulating medium can be greatly reduced, and the thermal efficiency can be greatly improved.
(4) In the present invention, the equipment is shared to increase the heat absorption process of the lower cycle (Rankine cycle) and improve the thermal efficiency.
(5) The present invention only uses a single working medium, which reduce the operation cost and improve the flexibility of thermal device.
(6) When the high-temperature expander is shared, the number of core equipment is reduced, which is conducive to reducing system investment and improving thermal efficiency.
(7) The lower cycle adopts double expansion process, which is conducive to flexible adjustment of working parameters and adaptability.
(8) The present invention effectively deals with the high-temperature heat source and the variable temperature heat source, the high-quality fuel and the non high-quality fuel, and has a wide range of application.
(9) On the premise of realizing high thermal efficiency, the device in the present invention can be selected to operate at low pressure, so as to greatly improve the operation safety of the device.
(10) The present invention can realize the heat recovery of enterprise device simply, actively, safely and efficiently.
(11) The thermal efficiency improves effectively when the present invention is applied to the lower end of the gas-steam combined cycle.
(12) When the present invention is applied to the coal-fired thermal system, it can maintain the original advantages of the traditional steam power cycle in which water vapor is used as working medium and has a wide range of working parameters. According to the actual situation, the present invention can work in subcritical, critical, supercritical or ultra supercritical state, etc.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2019 10397037.5 | May 2019 | CN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2020/000095 | 4/28/2020 | WO | 00 |
