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A method for matching area of ​​heat exchange network based on one-to-one and pair-to-two series

A technology of heat exchange area and heat exchange network, which is applied in the new heat exchange area matching field, can solve the problems of low calculation efficiency, large amount of reconstruction engineering, and cumbersome process, so as to reduce calculation time, investment cost and investment cost. Effect

Active Publication Date: 2021-10-26
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the existing area matching strategy, such as low calculation efficiency, cumbersome process, and large amount of renovation work, the present invention provides a fast and effective heat exchange area matching method based on one-to-one and pairwise series

Method used

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  • A method for matching area of ​​heat exchange network based on one-to-one and pair-to-two series
  • A method for matching area of ​​heat exchange network based on one-to-one and pair-to-two series
  • A method for matching area of ​​heat exchange network based on one-to-one and pair-to-two series

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example

[0047] Example: In order to better reflect the application effect of the present invention, the method of the present invention is now applied to examples for illustration. The case consists of two hot streams, two cold streams, one hot utility and one cold utility. The logistics data are shown in Table 1, the existing heat exchanger data are shown in Table 2, and the structure diagram of the existing heat exchange network is shown in figure 2 shown. The total heat transfer coefficient of all heat exchangers is 0.1kW / m 2 , and the service life of the equipment is 2 years, the annual interest rate is 10%, and the annualization factor of the investment cost is 0.576y -1 . New heat exchanger cost = 30000+750A 0.81 $; Increase area cost of existing heat exchanger = 750A 0.81 $. The utility consumption of this existing heat exchange network is 2720kW / y and the annual operating cost is 181200$ / y.

[0048]

[0049] Table 1

[0050] The simplified implementation steps are ...

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Abstract

A heat exchange network area matching method based on one-to-one and two-to-two series. First, match a single existing heat exchange area with a single required heat exchange area, and reuse the existing heat exchanger if the conditions are met; secondly For the matching of two existing heat exchange areas and a single required heat exchange area, if the conditions are met, the two existing heat exchangers will be reused in series; again, with a single existing heat exchange area and a single required heat exchange area The heat exchange area is reused by expanding the matching range. If the conditions are met, the existing heat exchanger is reused; finally, a new heat exchanger is configured for the remaining elements in the required area matrix that cannot match the existing heat exchange area. Heat Exchanger. The invention improves the area reuse rate of old heat exchange equipment, reduces investment cost, reduces calculation time and cost, and is fast and effective.

Description

technical field [0001] The invention relates to a new heat exchange area matching method, which can be used to transform the existing heat exchange network and improve the performance of the existing heat exchange network. Background technique [0002] As the most basic component of energy-intensive industries such as petroleum, chemical industry, and energy power, heat exchange networks are responsible for recovering energy from process industries. Retrofitting the existing heat exchange network plays a vital role in integrating process heat and improving the energy utilization efficiency of the heat exchange network. Today, the new heat exchange network market is basically saturated, and the existing heat exchange network is due to unreasonable design at the beginning of the plant, low technological level, and performance changes after long-term operation, etc., resulting in the existence of many existing heat exchange networks. Low operating efficiency, large energy cons...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/16
CPCG06F17/16
Inventor 蒋宁韩文巧郭风元徐英杰
Owner ZHEJIANG UNIV OF TECH
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