Transcritical low-temperature air energy generating set

Abstract

The invention relates to a transcritical low-temperature air energy generating set for new energy resource. The workflow of the transcritical low-temperature air energy generating set is as follows: after being pressurized by a booster pump, liquid working medium flows to a heat exchanger to output cold, is then turned into high-pressure supercritical fluid by a heat absorber, and expands to do work to generate electricity, part of the working medium is condensed by the heat exchanger, and then flows to the booster pump, and thereby an electricity-generating circulation system is formed; part of the working medium is throttled, expanded, cooled and depressurized to output cold, is then pressurized and cooled, and then flows to a throttle valve, and thereby a condensation circulation system is formed. The transcritical low-temperature air energy generating set also can be used for generating electricity with medium- and low-temperature heat sources such as residual heat, waste heat and terrestrial heat. The transcritical low-temperature air energy generating set condenses the working medium under the critical state, the cold in the system is sufficiently recycled, the power consumption of circulation is minimum, an outside cold source is not needed, the thermoelectric efficiency is high, the energy conversion density is high, the unit power investment is low, the cost is low, and the production of the cold air does not consume electricity. The transcritical low-temperature air energy generating set successfully breaks through the key difficult technology of low-temperature solar thermal power generation in terms of low thermal efficiency.

Description

technical field [0001] The invention relates to a new energy power generation device, in particular to a transcritical low-temperature air energy power generation device. Background technique [0002] Most of the energy on the earth comes from the sun, no matter wind energy, water energy, biomass energy or fossil energy - coal, oil, natural gas, combustible ice. In today's increasingly tense energy environment, new renewable, green and clean power generation technologies are receiving increasing attention. Now, among the new energy sources, solar power generation technologies such as hydropower and wind power, as well as direct utilization technologies of solar power generation—photovoltaic cells and mirror surface concentrating power generation technologies are quite mature; hydropower development potential is not great; and wind power and sunlight are too scattered, making The direct power generation devices of wind power and sunlight occupy a large area, and the one-tim...

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Problems solved by technology

[0003] In order to overcome the shortcomings of high investment and low thermal efficiency of the existing heat pump low-temperature thermal power generation device, the present invention provides a transcritical low-temperature air power generation device, which expands the working medium in a supercritical state , condensing in the critical state, fully recycle the internal cooling capacity of the system, and achieve the minimum power consumption of the working fluid condensation and compression, so that the transcritical low-temperature air energy power generation device does not need an external cold source, high thermoelectric efficiency, high energy conversion density, and low investment per unit power , low cost, by-product air-conditioning does not consume electricity

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