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Method and device for power generation by employing multiple dispersed residual heat sources and various residual heat carrier medium

A technology of waste heat and carrier, which is applied in the direction of steam engine device, machine/engine, combined combustion mitigation, etc., can solve the problems of poor economy, insufficient use of waste heat, and inability to use the heat of waste heat carrier medium to generate electricity at the same time, so as to improve the overall efficiency and relatively Less heat pollution, good independence effect

Inactive Publication Date: 2008-05-14
DONGFANG TURBINE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Limited to the above waste heat utilization conditions, most of the existing waste heat power generation devices are large-scale complete sets of equipment, which are only suitable for a specific waste heat carrier medium, and the working medium is also specific, and cannot use the heat of several waste heat carrier media to generate electricity at the same time
In particular, because the device is an isolated system, the temperature of the vapor-phase working medium (that is, the exhaust steam of the turbine) after doing work is still high, which contains a lot of heat, and the waste heat is not fully utilized, and additional energy is required to condense it, which is economical.

Method used

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  • Method and device for power generation by employing multiple dispersed residual heat sources and various residual heat carrier medium
  • Method and device for power generation by employing multiple dispersed residual heat sources and various residual heat carrier medium
  • Method and device for power generation by employing multiple dispersed residual heat sources and various residual heat carrier medium

Examples

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Effect test

example 1

[0033] As shown in Figure 2: For the high-temperature sub-circulation system, the working medium is extracted from the gas-liquid mixer 9 by the booster pump 10, transported to the high-temperature waste heat exchanger 1, heated and vaporized, and enters the micro-high-speed turbine 2, where it expands to perform work , to push the turbine 2 to rotate, thereby driving the micro high-speed motor 3 connected with the micro high-speed turbine 2 to rotate and generate electricity. The working medium is discharged from the turbine 2 after the work is done, enters the vapor-liquid mixer 9 to condense directly, and then enters the next cycle. The cooling method of the vapor-liquid mixer can be determined according to the actual situation, which can be air cooling, water cooling or other condensation methods; in the low-temperature sub-circulation system, the working medium is extracted from the vapor-liquid mixer 7 by the booster pump 8, and then passed through the steam in the high-t...

example 2

[0035] As shown in Figure 3: the cycle working mode of this system is basically the same as that in Figure 2, the difference is that a regenerative heat exchange structure is added to the high-temperature and low-temperature sub-cycles, in which the liquid working medium is preheated by the exhaust of the turbine, specifically: for high-temperature In the sub-cycle, the exhaust gas in the micro high-speed turbine 2 will first enter the recuperation heat exchanger 4 and then enter the vapor-liquid mixer 11. After the working medium is condensed, it will enter the recuperation heat exchanger 4 through the booster pump 12, and will be pre-heated by the exhaust gas. After heating, it enters the high-temperature waste heat exchanger 1; for the low-temperature sub-cycle, the exhaust gas in the micro high-speed turbine 6 will first enter the recuperation heat exchanger 8 and then enter the vapor-liquid mixer 9, and the working fluid will be condensed and then passed through the booster...

example 3

[0037]As shown in Figure 4: the working mode of this system is basically the same as that in Figure 3, the difference is that an intermediate heat exchanger is added to the high-temperature sub-cycle to preheat the working fluid from the regenerator in the low-temperature sub-cycle, specifically: For the high-temperature cycle, the exhaust gas in the micro high-speed turbine 2 enters the intermediate heat exchanger 4, then enters the recuperation heat exchanger 11, and then enters the vapor-liquid mixer 12, and enters the recuperation heat exchanger 11 through the booster pump 13 after condensation After being preheated by the exhaust gas, it enters the high-temperature waste heat exchanger 1; for the low-temperature cycle, the exhaust gas in the micro high-speed turbine 6 enters the recuperation heat exchanger 8, and then enters the vapor-liquid mixer 9, and after being condensed, passes through the booster pump 10 Enter the vapor-liquid mixer 12, then enter the recuperation h...

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Abstract

The invention discloses a method of making use of a plurality of dispersed waste heat sources and various waste heat vector mediums for generating. A waste heat generating system is arranged and the system is provided with a plurality of subsystems at the same row; the number of the subsystems is same as that of the dispersed waste heat sources. Each subsystem has a closed circuit cycle device comprising a working fluid condenser, a pump, a waste heat exchanger and a turbine that are connected through pipes in sequence and a motor connected with the turbine; the working fluid to each subsystem is matching with the waste heat vector medium of the subsystem. All subsystems are divided into groups with two in each group and each group has a high temperature subsystem and a low temperature subsystem; the liquid phase working fluid of the low temperature subsystem exchanges heat with the vapor phase working fluid of the high temperature subsystem which has done work and then is sent to the waste heat exchanger of the low temperature subsystem to be vaporized after being preheated; or the liquid phase working fluid of both the high and the low temperature subsystems respectively exchange heat with the vapor phase working fluid of the high temperature subsystem which has done work and then are sent to each waste heat exchanger to be vaporized after being preheated.

Description

technical field [0001] The present invention relates to waste heat power generation technology, in particular to a method and device for generating electricity by using waste heat sources with a wide distribution range, a large total heat power but a small single heat power and diverse waste heat carrier media. Background technique [0002] my country is a big country in energy production and consumption. Its energy production ranks third in the world after the United States and Russia. Basic energy consumption accounts for 1 / 10 of the world's total consumption, second only to the United States and ranks second in the world. But my country's energy utilization rate is not high, and some developed countries have an energy utilization rate of more than 50%. The energy utilization rate of the United States has exceeded 60%, while my country's energy utilization rate is only about 30%. According to statistics, in 2003 my country's energy consumption intensity was 6.9 times that ...

Claims

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Application Information

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IPC IPC(8): F01K23/06F01K25/06
CPCY02E20/18
Inventor 谢永慧谈芦益张荻孔祥林王建录商宇潘家成孙奇
Owner DONGFANG TURBINE CO LTD
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