CN102191958A - Low temperature air power generation device - Google Patents

Abstract

A new energy low-temperature air energy power generation device mainly comprises an evaporator, an expansion power generation unit, a Stirling power generation unit, a heat absorber, a compressor and a working medium pump; the system also comprises a pipeline, an accessory and a detection and control device which are connected in the system, and working media are arranged in the closed system. The liquid working medium is heated into a high-pressure gas state by the evaporator, enters the expansion generator set to expand, do work, generate electricity, reduce temperature and reduce pressure, is used as a cold source, absorbs heat energy in air by the heat absorber after absorbing the heat energy by the Stirling generator set, and flows to the compressor, and the outlet pressure of the expansion generator set is determined by the inlet pressure of the compressor; the high-temperature and high-pressure working medium compressed by the compressor is used as a heat source and flows to the Stirling generator set to release heat and condense, and the Stirling generator set utilizes the temperature difference to do work to generate electricity. And the condensed working medium is pumped into the evaporator by the working medium pump to absorb heat, so as to form a closed circulating system. It needs no external cold source, and has high heat efficiency, simple structure, low investment and low cost.

Description

Low temperature air power generation device

technical field

The invention relates to a new energy generating device, in particular to a low-temperature air energy generating device.

Background technique

The vast majority of electric energy 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 electric energy utilization technologies are gaining more and more attention. Now, among new energy sources, solar power generation technologies such as hydropower and wind power, and direct utilization technologies of solar power generation—photovoltaic cells and mirror surface concentrating power generation technologies are quite mature; the development potential of hydropower generation is not great; and wind power and sunlight are too scattered. The direct use of wind power and solar power generation occupies a large area and requires a very high one-time investment. The earth's atmosphere absorbs and emits the energy of solar radiation repeatedly every day, and the ambient fluid that absorbs solar heat energy—the solar heat energy in the air is renewed every day, which is almost inexhaustible. Thereby people are stepping up research on the thermal power generation technology in the air of the environmental fluid of new indirect utilization of solar thermal energy-air. Among them, low-temperature solar thermal power generation technology is the most promising high-tech. At present, known heat pump low-temperature air power generation devices use a heat pump system to enrich low-temperature solar heat in the air and then use a Rankine cycle system to generate electricity. The heat pump system mainly includes compressors, condensers, throttles, and evaporators; the Rankine cycle power generation system mainly includes condensers, circulating pumps, evaporators, and expansion generator sets. The heat pump low-temperature solar thermal power generation technology not only consumes energy for the operation of the heat pump, but also a large amount of heat consumed by the condenser of the Rankine cycle power generation system will flow out of the power generation system and not be effectively used. It has complex structure, high investment, and especially low thermal efficiency.

Contents of the invention

In order to overcome the disadvantages of the existing heat pump low-temperature air power generation device, such as complex structure, high investment, and low thermal efficiency, the present invention provides a low-temperature air power generation device, which does not require an external cooling source, and has high thermal efficiency and Simple structure, low investment and low cost.

The technical solution adopted by the present invention to solve its technical problems is: the low-temperature air power generation device mainly includes an evaporator, an expansion generator set, a Stirling generator set, a heat absorber, a compressor, and a working medium pump; The connected pipelines, accessories and detection and control devices have working fluid in the closed system. The evaporator can absorb the low-temperature ambient fluid—heat energy in the air to heat the liquid working medium to become a high-pressure gaseous working medium, and then the high-pressure gaseous working medium enters the expansion generator set to expand and generate power; the outlet of the expansion generator set is a low-temperature and low-pressure working medium, and the low-temperature and low-pressure working medium works The cold source absorbs heat through the Stirling generator set and then flows to the compressor through the heat absorber to further absorb the heat energy in the air. The outlet pressure of the expansion generator set is determined by the inlet pressure of the compressor; the high-temperature and high-pressure working medium compressed by the compressor works The heat source flows to the Stirling generator set to release heat and condense, and the Stirling generator set uses the temperature difference to generate power. The condensed working medium is then pressed into the evaporator through the working medium pump, absorbing the heat energy in the low-temperature ambient fluid—the air to heat the liquid working medium to become a high-pressure gaseous working medium, and then the high-pressure gaseous working medium enters the expansion generator set to expand and generate power, thus forming Closed circulatory system. The compressor of the low-temperature air power generation device can also be a multi-stage compressor unit; and its primary compressor can also be directly connected between the outlet of the expansion generator set and the Stirling generator set to maintain the low pressure at the outlet of the expansion generator set. The low-temperature air power generation device can also be connected to the main shaft of the expansion generator set, the main shaft of the Stirling generator set, and the main shaft of the compressor. The heat absorber of the low-temperature air energy power generation device is a high-efficiency heat pipe heat exchanger. The low-temperature air power generation device can also be installed on vehicles, ships and other mechanical equipment as a direct power device or a charging device. The low-temperature air energy power generation device produces cold air as a by-product.

The beneficial effect of the present invention is that the low-temperature air energy generating device does not need an external cold source, has high thermal efficiency, simple structure, low investment and low cost.

Description of drawings

The present invention will be further described below in conjunction with drawings and embodiments.

Accompanying drawing is the workflow diagram of the embodiment of the present invention.

In the figure 1. Evaporator 2. Expansion generator set 3. Stirling generator set 4. Heat absorber 5. Compressor 6. Working medium pump.

Detailed ways

In the embodiment shown in the drawings, the low-temperature air power generation device mainly includes an evaporator (1), an expansion generator set (2), a Stirling generator set (3), a heat absorber (4), a compressor (5 ), the working fluid pump (6); it also includes the connected pipes, accessories, and detection and control devices in the system, and there is a working fluid in the closed system. The evaporator (1) can absorb the heat energy in the low-temperature ambient fluid—the air to heat the liquid working medium to become a high-pressure gaseous working medium, and then enter the expansion generator set (2) to expand and generate power; the outlet of the expansion generator set (2) is a low-temperature and low-pressure working medium, The low-temperature and low-pressure working medium is used as a cold source through the Stirling generator set (3) to absorb heat, and then the heat absorber (4) further absorbs the heat energy in the air and then flows to the compressor (5). The outlet pressure of the expansion generator set (2) is determined by The inlet pressure of the compressor (5) is determined; the high-temperature and high-pressure working fluid compressed by the compressor (5) acts as a heat source and flows to the Stirling generator set (3) to release heat and condense, and the Stirling generator set (3) uses the temperature difference to generate power. The condensed working fluid is then pressed into the evaporator (1) through the working medium pump (6), absorbing the heat energy in the low-temperature ambient fluid—the air, heating the liquid working medium to become a high-pressure gaseous working medium, and then entering the expansion generator set (2) to expand and perform work Generate electricity, thus forming a closed loop system. The main shaft of the expansion generator set (2) of the low-temperature air power generation device, the main shaft of the Stirling generator set (3) and the main shaft of the compressor (5) can also be connected. The heat absorber (4) of the low-temperature air energy power generation device is a high-efficiency heat pipe heat exchanger.

Claims (5)

1. A low-temperature air energy power generation device mainly includes an evaporator, an expansion generator set, a Stirling generator set, a heat absorber, a compressor, and a working medium pump, and it also includes connected pipes, accessories, and detection and control in the system The device has a working medium in the closed system, and is characterized in that: an evaporator, an expansion generator set, a Stirling generator set, a heat absorber, a compressor, and a working medium pump are connected in sequence to form a circulation system. 2. The low-temperature air energy generating device according to claim 1, characterized in that: the heat absorber of the low-temperature air energy generating device is a high-efficiency heat pipe heat exchanger. 3. The low-temperature air power generation device according to claim 1, characterized in that: the compressor of the low-temperature air power generation device can also be a multi-stage compressor, and its primary compressor can also be directly connected between the outlet of the expansion generator set and the Between Stirling generator sets. 4. The low-temperature air power generation device according to claim 1, characterized in that: the main shaft of the expansion generator unit, the main shaft of the Stirling generator unit and the main shaft of the compressor of the low-temperature air power generation device can also be connected. 5. The low-temperature air power generation device according to claim 1, characterized in that: the low-temperature air power generation device can also be installed on vehicles, ships and other mechanical equipment as a direct power device or a charging device.