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An experimental system for heat transfer of supercritical water and carbon dioxide mixed working fluid

A technology of carbon dioxide and mixed working fluid, which is applied in the direction of material thermal conductivity, material thermal development, etc., can solve problems such as difficult to achieve steady state conditions, consume manpower and material resources, and long operating time, so as to avoid current cross flow, save energy, and improve The effect of heating rate

Active Publication Date: 2022-04-22
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing experimental bench does not adopt modular automatic control design, which is difficult to operate, takes a long time to operate, consumes manpower and material resources, and is difficult to achieve steady-state conditions

Method used

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  • An experimental system for heat transfer of supercritical water and carbon dioxide mixed working fluid
  • An experimental system for heat transfer of supercritical water and carbon dioxide mixed working fluid
  • An experimental system for heat transfer of supercritical water and carbon dioxide mixed working fluid

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Experimental program
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Embodiment 1

[0040] As an embodiment of the experimental system for heat transfer of supercritical water and carbon dioxide mixed working fluid described in the present invention, such as Figure 1~3 As shown, the water supply unit 100 includes a water storage tank 101 and a first control assembly 102 communicated with it; the carbon dioxide supply unit 200 includes a carbon dioxide liquefaction supply assembly 201 and a second control assembly 202 communicated with it; the preheating mixing unit 300 includes The first preheating component 301 for heating the working fluid in the water supply unit 100, the second preheating component 302 for heating the working fluid in the carbon dioxide supply unit 200, the mixing chamber 303, and the mixing chamber The third preheating assembly 304 for heating the working medium after mixing in the body 303; the mixing chamber 303 is respectively connected with the water supply unit 100 and the carbon dioxide supply unit 200; the first control assembly 1...

Embodiment 2

[0049] The difference between this embodiment and embodiment 1 is that, as Figure 1~4 As shown, the carbon dioxide liquefaction supply assembly 201 includes a carbon dioxide gas cylinder 201a connected in sequence, a third control assembly 201b, a carbon dioxide liquefaction supply tank 201c, and a refrigerant for cooling the carbon dioxide liquefaction; the third control assembly 201b controls Carbon dioxide is passed into the carbon dioxide liquefaction supply tank 201c from the carbon dioxide cylinder 201a.

[0050] preferred, such as image 3 As shown, the carbon dioxide liquefaction supply tank 201c includes a refrigerant inlet 201c-1 located at the bottom of the carbon dioxide liquefaction supply tank 201c, which is located inside the carbon dioxide liquefaction supply tank 201c and connected to the refrigerant inlet 201c-1. 1 connected cooling coil 201c-2, a refrigerant outlet 201c-3 located on the side wall of the carbon dioxide liquefaction supply tank 201c and comm...

Embodiment 3

[0055] As an embodiment of the experimental system for heat transfer of supercritical water and carbon dioxide mixed working medium of the present invention, such as Figure 4 As shown, in the preheating mixing unit 300 of the present invention, each preheating assembly is powered by a DC power supply 306, and each preheating assembly includes at least four conductive plates, and the conductive plates are connected to the power supply in turn Negative pole, positive pole, positive pole, negative pole of the battery, the negative poles are all grounded. Preferably, the preheating mixing unit 300 further includes a temperature measuring thermocouple 305 to control the heating temperature.

[0056]Preferably, the first preheating component 301 is divided into two sections to heat the working medium water, the first section is heated to 350°C, the second section is heated to 400°C, and the second preheating assembly 302 is used to heat the working medium carbon dioxide to 400°C ;...

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Abstract

The invention discloses an experimental system for heat transfer of mixed working medium of supercritical water and carbon dioxide, wherein the water supply unit includes a water storage tank and a first control assembly connected to it; the carbon dioxide supply unit includes a carbon dioxide liquefaction feed assembly connected to it The second control assembly connected; the preheating mixing unit, the cooling unit, and the pressure-controlled discharge unit communicated with the cooling unit, including an electric pressure regulating valve and a pneumatic back pressure valve connected in sequence. The present invention can avoid the problem of current cross flow without using unidirectional diodes to isolate each heating module, improves reliability and economy, does not have the problems of carbon dioxide gasification and ice blockage, and saves energy.

Description

technical field [0001] The invention belongs to the technical field of supercritical mixed working medium, and in particular relates to a heat transfer experiment system for supercritical water and carbon dioxide mixed working medium. Background technique [0002] Supercritical working fluid has a good application prospect in the field of multi-energy hybrid power generation. In the existing measurement and research on the heat transfer characteristics of supercritical working fluids, pure working fluids are mostly used. There is no measurement of the heat transfer characteristics of supercritical water and carbon dioxide mixed working fluid. For the development of new polygeneration technology for thermal power generation, it is urgent to invent a system and method for studying the heat transfer characteristics of supercritical water and carbon dioxide mixed working fluid. The measurement of the mixed working fluid needs to ensure that the thermal physical properties of w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/20G01N25/18
CPCG01N25/20G01N25/18
Inventor 刘东张翰林吴昊旻李莎李强
Owner NANJING UNIV OF SCI & TECH
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