Method and device for electricity generation by using geothermal energy

Abstract

The invention relates to a power generation method and device with geothermal energy, and the invention is characterized in that the method includes the following steps: a. Utilize geothermal circulation on the bottom of geothermal wells to heat water inside the well; and then, utilze the hot water to increase temperature of low-boiling-point working substance liquid inside a heat exchanger, so that ebullition can be fulfilled to continuously produce working substance steam; b. continuously deliver working substance steam in a certain pressure, in order to propel a steam engine to work and, meanwhile, rotate a generator to create electric power; c. condense low-pressure working substance steam out of the steam engne to enter the heat exchanger; and then, heat the hot water into an ebullition status, so that the working substance steam can be formed into low-boiling point working substance for closed circulation purpose. The power generation method and device with geothermal energy in the invention can conveniently and effectively utilize geothermal energy in 3500 meters underground, so that no greenhouse gas is emitted. Moreover, the invention can guarantee less investment, short construction period and low power generation cost.

Description

technical field [0001] The present invention relates to a method and a device for generating electricity by using geothermal energy, in particular to a method and a device for generating electricity by using mid-level geothermal energy, that is, thermal energy of an underground well with a depth of about 3,500 meters. Background technique [0002] Since human beings began to realize the industrialized society, fossil fuels such as coal and oil have been used in large quantities, and the CO added to the atmosphere 2 Greenhouse gases have caused the increasingly serious greenhouse effect, rapidly warming the global climate, and the frequency and intensity of extreme abnormal climates have increased significantly, which has caused huge disasters and losses to human beings. Global threats have become a common and major task facing all mankind. In the Earth's atmosphere, a 3% annual increase in CO 2 The most common source of greenhouse gases is the combustion of coal. Generally...

AI Technical Summary

Problems solved by technology

my country's geothermal energy reserves within an economic mining depth of 3,000 meters are equivalent to 1,570 times the total energy consumption in my country, or 15,000 times the total installed capacity of existing generators, and can guarantee a sufficient amount of billions of years supply, geothermal energy is very abundant, but so far has not been applied in large-scale industries

At present, only a few countries, including my country, use the steam from a few underground hot spring wells with a steam pressure greater than 1 atmosphere to generate electricity, and the hot spring steam is used in a one-time open recycling method. sustainability issues

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