Combined cycle power Device

Abstract

The invention provides a combined cycle power device, and belongs to the technical field of energy and power. A condenser communicates with an evaporator through a circulating pump via a condensate pipeline, and then the evaporator communicates with a high-temperature heat exchanger through a steam channel; a compressor communicates with the high-temperature heat exchanger through the steam channel; the high-temperature heat exchanger also communicates with an expander through the steam channel; the expander communicates with the evaporator through a low-pressure steam channel, and then the evaporator communicates with the compressor and a second expander through the low-pressure steam channel; the second expander communicates with the condenser through the low-pressure steam channel; thehigh-temperature heat exchanger communicates with the outside through a heat source medium channel; the condenser communicates with the outside through a cooling medium channel; the evaporator communicates with the outside through the heat source medium channel; and the expander and the second expander are connected with the compressor and transmit power to form the combined cycle power Device.

Description

Technical field: [0001] The invention belongs to the field of energy and power technology. Background technique: [0002] Cold demand, heat demand and power demand are common in human life and production; among them, the conversion of heat energy into mechanical energy is an important way to obtain and provide power. Under normal circumstances, the temperature of the heat source decreases with the release of heat, and the heat source changes temperature. When fossil fuels are used as the source of energy, the heat source has the dual characteristics of high temperature and variable temperature, which makes it difficult for power plants based on a single thermal cycle to convert more heat energy into mechanical energy; for high-quality fuels, traditional ones can be used. The gas-steam combined cycle has high thermal efficiency, but there are still problems such as high cost, large investment, and thermal efficiency to be improved. [0003] Take the external combustion type steam ...

AI Technical Summary

Problems solved by technology

When fossil fuels are used as the source of energy, the heat source has the dual characteristics of high temperature and variable temperature at the same time, which makes it difficult for power plants based on a single thermodynamic cycle to convert more heat energy into mechanical energy; for high-quality fuels, traditional The gas-steam combined cycle achieves high thermal efficiency, but there are still problems such as high cost, large investment, and thermal efficiency to be improved

[0003] Take the external combustion steam power plant as an example, the heat source is high temperature and variable temperature heat source; when the Rankine cycle is used as the theoretical basis and water vapor is used as the circulating working medium to achieve thermal power conversion, due to the temperature and pressure resistance of the material And safety restrictions, no matter what parameters are used, there is a large temperature difference loss between the circulating working fluid and the heat source, and the irreversible loss is large, resulting in low thermal efficiency, which also means that there is great potential for improving thermal efficiency

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