CN201991574U - Low-temperature heat energy power generation device - Google Patents

Abstract

A low-temperature heat energy power generation device comprises a heat absorber, an expansion engine unit, a power generator, an internal heat exchanger, a compressor unit, a gas-liquid separator, a working medium pump, a pipeline, an accessory and a detection and control device, wherein the pipeline, the accessory and the detection and control device are connected with the working medium pump, and working media are arranged in a closed system. The heat absorber can absorb heat energy of air and water to heat liquid working medium into gaseous working medium, the gaseous working medium sequentially enters a primary expansion engine to do work by expansion, an internal heat exchanger to absorb heat, a secondary expansion engine to do work by expansion, a compressor to pressurize, an internal heat exchanger to release heat and condense, a gas-liquid separator, a gas part is pressurized by the compressor, a liquid part is pumped into the heat absorber by the working medium pump to absorb heat and gasify, and the gas part and the liquid part jointly enter an expansion engine set to do work by expansion; this forms a closed circulation system. It can also be installed on vehicles, ships and other mechanical equipment as a direct power device or a charging device. It has no heat pump system, high heat efficiency, simple structure, low investment and low cost, and can produce cold air as by-product.

Description

Low temperature thermal power generation device

technical field

The utility model relates to a power generation device, in particular to a low-temperature thermal energy power generation 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, as well as direct utilization technologies for solar power generation—photovoltaic cells and mirror surface heat-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 radiates the energy of the sun every day, and the environmental fluids that absorb solar thermal energy - the solar thermal energy in the air and water are almost inexhaustible, so people are stepping up research on new indirect utilization of solar thermal energy Environmental fluids - thermal power generation technology in air and water. Among them, low-temperature solar thermal power generation technology is the most promising high-tech. At present, the known heat pump type low-temperature thermal power generation device adopts a heat pump system to enrich low-temperature solar heat energy in air and water, and then uses a Rankine cycle system to generate power. The heat pump system mainly includes compressors, condensers, throttles, and evaporators; the Rankine cycle power generation system mainly includes condensers, circulating pumps, evaporators, expansion engines, and generators. The heat pump low-temperature solar thermal power generation technology not only consumes energy for the operation of the heat pump, but also the 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 shortcomings of the existing heat pump type low-temperature thermal power generation device, such as complex structure, high investment, and low thermal efficiency, the utility model provides a low-temperature thermal power generation device. The low-temperature thermal power generation device has no heat pump system, high thermal efficiency, simple structure and low investment. Low, low cost.

The technical solution adopted by the utility model to solve the technical problems is: the low-temperature thermal power generation device mainly includes a heat absorber, an expansion engine unit, a generator, an internal heat exchanger, a compressor unit, a gas-liquid separator, and a working medium pump; It also includes connected pipelines, accessories and detection and control devices in the system. There is working fluid in the closed system; the generator is connected with the expansion engine. The heat absorber can absorb the heat energy of the low-temperature environmental fluid-air and water to heat the liquid working medium into a gaseous working medium, and then enter the expansion engine group to expand and do work, driving the generator to generate electricity; the outlet of the primary expansion engine is a low-temperature working medium, and the low-temperature working medium passes through After absorbing heat, the internal heat exchanger flows to the secondary expansion engine to expand and perform work, and then flows to the compressor. The outlet pressure of the expansion engine group is determined by the inlet pressure of the compressor; the high-pressure working medium compressed by the compressor flows to the internal heat exchanger to release heat and condense. Then flow into the gas-liquid separator, in which the gas part is pressurized by the compressor, and the liquid part is pressed into the heat absorber by the working medium pump to absorb the low-temperature ambient fluid-the heat energy in the air and water heats the liquid working medium to become a gaseous working medium, and then jointly Entering the expansion engine group to expand and do work, drive the generator to generate electricity, thus forming a closed cycle system. The compressor of the low-temperature thermal power generation device may also be a multi-stage compressor unit. The main shaft of the expansion engine and the main shaft of the compressor of the low-temperature thermal power generation device may also be connected through a clutch. The working fluid of the low-temperature thermal power generation device may be a single-component working fluid or a step-by-step liquefied multi-component working fluid. The low-temperature thermal energy 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 thermal power generation device produces cold air as a by-product.

The beneficial effect of the utility model is that the low-temperature thermal energy power generation device has no heat pump system, has high thermal efficiency, simple structure, low investment and low cost.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Accompanying drawing is the working flow schematic diagram of the utility model embodiment.

In the figure 1. Heat sink 2. Primary expansion engine 3. Generator 4. Internal heat exchanger

5. Secondary expansion engine 6. Generator 7. Compressor 8. Gas-liquid separator 9. Working medium pump

10. Compressor.

Detailed ways

In the embodiment shown in the drawings, the low-temperature thermal energy power generation device mainly includes a heat absorber (1), a primary expansion engine (2), a generator (3), an internal heat exchanger (4), a secondary expansion engine (5 ), generator (6), compressor (7), gas-liquid separator (8), working medium pump (9), compressor (10); it also includes connected pipelines, accessories, detection and control in the system The device has working fluid in the closed system; the generator (3) is connected with the primary expansion engine (2), and the generator (6) is connected with the secondary expansion engine (5). The heat absorber (1) can absorb the heat energy in the low temperature environment fluid - air and water to heat the liquid working medium to become a gaseous working medium, and then enter the primary expansion engine (2) to expand and do work, driving the generator (3) to generate electricity; the primary expansion engine ( 2) The outlet is low-temperature working fluid, which flows to the secondary expansion engine (5) after absorbing heat through the internal heat exchanger (4) to expand and perform work, and then flows to the compressor (7); the outlet pressure of the secondary expansion engine (5) Determined by the inlet pressure of the compressor (7); the high-pressure working fluid compressed by the compressor (7) flows to the internal heat exchanger (4) to release heat and condense, and then flows into the gas-liquid separator (8), where the gas part passes through the compressor (10) Pressurization, wherein the liquid part is pressed into the heat absorber by the working medium pump (9) (1) absorbs the heat energy of the low-temperature ambient fluid-air and water to heat the liquid working medium to become a gaseous working medium, and then enters the primary expansion engine together (2) expands to do work, drives generator (3) to generate electricity; Formed a closed loop system like this. The compressor (7) and compressor (10) of the low-temperature thermal energy power generation device may also be a multi-stage compressor unit. The main shafts of the primary expansion engine (2) and the secondary expansion engine (5) of the low-temperature thermal power generation device and the main shafts of the compressor (7) and the compressor (10) can also be connected through clutches.

Claims (3)

1. a low temperature heat energy electricity generating device mainly comprises heat absorber, expansion cluster engine, generator, internal exchanger, compressor bank, gas-liquid separator, working medium pump and the pipeline that is connected, annex and detection and control gear, and working medium is arranged in the closed system; It is characterized in that: in the expansion cluster engine internal exchanger is arranged, the outlet of expansion cluster engine connects compressor, and compressor outlet connects internal exchanger.

2. low temperature heat energy electricity generating device according to claim 1 is characterized in that: the compressor of this low temperature heat energy electricity generating device is a multistage compressor.

3. low temperature heat energy electricity generating device according to claim 1 is characterized in that: be connected by clutch between this low temperature heat energy electricity generating device expansion cluster engine main shaft and the compressor bank main shaft.

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