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Energy efficiency quantitative evaluation method for heat exchanger

A heat exchanger, quantitative evaluation technology, applied in instruments, special data processing applications, electrical digital data processing, etc., can solve the problems of lack of practical significance of energy efficiency evaluation results, and achieve good stability.

Active Publication Date: 2014-09-10
LANZHOU GUANYU HEAT TRANSFER & ENERGY SAVING ENG RES +2
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Problems solved by technology

Since the test conditions may be quite different from the actual working conditions, if the above-mentioned evaluation indicators or methods are used, the energy efficiency evaluation results will lack practical significance

Method used

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  • Energy efficiency quantitative evaluation method for heat exchanger
  • Energy efficiency quantitative evaluation method for heat exchanger
  • Energy efficiency quantitative evaluation method for heat exchanger

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Embodiment Construction

[0047] The present invention is implemented under the framework of national standard testing requirements (heat exchanger and heat transfer element performance test method GB / T27698-2011), and the specific method includes the following steps:

[0048] (1) Test the heat transfer performance of the heat exchanger under evaluation, and obtain the total heat transfer performance under standard working conditions (water-water countercurrent flow, qualitative temperature hot fluid 50°C, cold fluid 30°C, cold and hot fluid velocity 0.5m / s) thermal coefficient k , unit: W·m -2 ·K -1 ;

[0049] (2) Under the same conditions, test the flow performance of the evaluated heat exchanger, and obtain the flow pressure drop Δ of cold and hot fluids under standard working conditions p c 、 Δ p h , unit: Pa;

[0050] (3) Calculate the energy efficiency evaluation index of the evaluated heat exchanger ;

[0051] (4) Query the energy efficiency level of the evaluated heat exchanger among...

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Abstract

The invention relates to an energy efficiency quantitative evaluation method for a heat exchanger. The energy efficiency evaluation index of the heat exchanger of the same kind is made to meet the stability requirement, the energy efficiency evaluation index of the heat exchanger is in a weak correlation relation with the flowing speed of fluid of the heat exchanger and the heat exchange area, and based on the requirement in the heat exchanger and heat transfer element performance test method GB / T27698-2011, the method comprises the steps that (1), the heat transfer performance of the evaluated heat exchanger is tested, and a total heat transfer coefficient k under the standard work condition is obtained; (2) the flowing performance of the evaluated heat exchanger is tested under the same condition, and the flowing pressure drops delta pc and delta ph generated when cold fluid and heat fluid flow through the heat exchanger under the standard work condition are obtained; (3) the energy efficiency evaluation index (please see the formula in the specification) of the evaluated heat exchanger is calculated. The method reflects the fixed energy efficiency property of the heat exchanger, the energy efficiency of the heat exchanger of the same kind meets the determined probability statistics distribution rule, and the scientific implementation method is provided for determining the energy efficiency and grade of the heat exchanger.

Description

technical field [0001] The invention belongs to the technical field of performance evaluation of heat exchangers, in particular to a quantitative evaluation method of energy efficiency levels of heat exchangers. Background technique [0002] A heat exchanger is a device that transfers heat from a hot fluid to a cold fluid to meet process requirements. It is widely used in petroleum, chemical, electric power, metallurgy, food, pharmaceutical, aerospace, vehicle engineering and many other industrial fields. Scientific determination of its energy efficiency level is a clear requirement of laws and regulations such as the "Energy Conservation Law of the People's Republic of China", "Regulations on Safety Supervision of Special Equipment", "Measures for the Supervision and Administration of Energy Conservation of High Energy Consumption Special Equipment", and is of great importance to the promotion of heat exchanger industry technology. It is of great significance to improve ene...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 张延丰白博峰周文学蒋琛寿比南
Owner LANZHOU GUANYU HEAT TRANSFER & ENERGY SAVING ENG RES
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