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Heat exchanger, heat engine circulating system and control method thereof

A technology for heat exchangers and control methods, applied in heat exchange equipment, machines/engines, compressors, etc., can solve problems such as instability, expander vibration power output, increased thermal resistance, etc.

Active Publication Date: 2015-03-18
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is in a saturated vapor state, due to the high flow rate of the working medium at the outlet, it may flow out with liquid droplets, and the liquid droplets of the working medium will cause liquid expansion in the expander, resulting in vibration and unstable power output when the expander is running.
If it is in a superheated vapor state, the thermal resistance of the working fluid in the evaporator will increase, resulting in a decrease in the overall heat transfer performance

Method used

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  • Heat exchanger, heat engine circulating system and control method thereof
  • Heat exchanger, heat engine circulating system and control method thereof
  • Heat exchanger, heat engine circulating system and control method thereof

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Embodiment Construction

[0044] The structural principle and working principle of the present invention will be described in detail below in conjunction with the accompanying drawings:

[0045] In an example of this embodiment, the heat transfer performance of the working fluid is improved by controlling the dryness of the working fluid. For example: Use an evaporator with a vapor-liquid separator, and let the vapor-liquid two-phase working fluid exit the evaporator and enter the vapor-liquid separator. When the working fluid in the evaporator is in a vapor-liquid two-phase state, the dryness of the working fluid is maintained between 60% and 80%. Compared with the liquid working medium or the superheated vapor working medium, the vapor-liquid two-phase working medium has better heat transfer coefficient and lower thermal resistance, so the dryness of the working medium is maintained between 60% and 80% , Will improve the heat transfer performance of the working fluid.

[0046] In one embodiment, if the ...

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PUM

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Abstract

Provided are a heat exchanger, a heat engine circulating system and a control method thereof. The heat exchanger comprises an evaporator, a gas-liquid separator, a liquid level sensor, and a controller. The evaporator is used to heat a working medium to two phases of gas and liquid. The evaporator is provided with a working medium inlet line and a working medium outlet line. The gas-liquid separator is connected with the working medium outlet line, so as to separate the working medium to a gas state working medium and a liquid state working medium. The liquid level sensor is used to detect height of the liquid state working medium in the gas-liquid separator and output a liquid level signal. The controller is used to receive the liquid level signal, and controls dryness degree of the working medium in the evaporator.

Description

Technical field [0001] The invention relates to a heat transfer device, and in particular to a heat exchanger with a working fluid quality control mechanism and a heat engine circulation system thereof. Background technique [0002] The medium and low temperature waste heat power generation market has developed vigorously in recent years, among which the Organic Rankine Cycle (ORC) is the most mature and economical technology among the current medium and low temperature waste heat power generation technologies. The organic Rankine cycle is a closed heat engine cycle system. Its key components and working principles are as follows: (1) working fluid pump: boosts the liquid working fluid and sends it to the evaporator for heating; (2) evaporator (evaporator): absorbs the heat energy of the heat source fluid, and uses the steam chemical material; (3) expander and power generator (expander and power generator): converts the heat and pressure energy of the working fluid into the shaft...

Claims

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Application Information

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IPC IPC(8): F25B39/02F25B49/00F28F27/00
CPCF01K25/08F25B9/06F25B39/02F25B49/00F25B2500/09Y02E60/14
Inventor 徐菘蔚郭启荣
Owner IND TECH RES INST
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