A method for calculating thermal resistance of series-parallel heat exchangers in compressed air energy storage system

By using the thermal resistance calculation method of series and parallel heat exchanger in compressed air energy storage system, a heat exchanger model based on standard thermal resistance is established, which solves the problem of insufficient heat exchanger design calculation in the prior art, improves the calculation accuracy and simplifies the heat exchange process.

CN119312734BActive Publication Date: 2025-03-28POWERCHINA HEBEI ELECTRIC POWER SURVEY & DESIGN INST CO LTD +1
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Patent Information

Application Number
CN202411848294.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-12-16
Publication Date
2025-03-28
Estimated Expiration
2044-12-16

AI Technical Summary

Technical Problem

There are insufficient heat exchanger design calculations in the existing compressed air energy storage system, and the impact of the heat exchanger layout on the outlet temperature cannot be fully considered, resulting in large errors.

Method used

A method for calculating thermal resistance of series-parallel heat exchangers in compressed air energy storage system is adopted, and a model is established based on the standard thermal resistance of heat exchangers of imported temperature pressure. The heat exchanger is simplified and decomposed into equivalent thermal resistance through the standard thermal resistance method. The temperature distribution of different thermal resistances is calculated using the series and parallel circuit law.

Benefits of technology

It improves the accuracy of heat exchanger design and calculation, is more in line with the actual system operating conditions, provides a more accurate mathematical model for relevant system research, and simplifies the heat exchange process.

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Abstract

The present invention discloses a method for calculating the thermal resistance of a series-parallel heat exchanger in a compressed air energy storage system, which belongs to the field of compressed air energy storage. A heat exchanger model is established based on the standard thermal resistance of the heat exchanger at the inlet temperature and pressure according to different arrangements of the heat exchanger in the overall system; the heat exchanger is simplified by the standard thermal resistance method and decomposed into a number of equivalent thermal resistances, and the temperature distribution of different thermal resistances is calculated using the circuit rules of series and parallel connection. The present invention can overcome the shortcomings of traditional heat exchanger modeling methods, and establish a heat exchanger model based on the standard thermal resistance of the heat exchanger at the inlet temperature and pressure according to different arrangements of the heat exchanger in the overall system. By establishing an energy flow model of the heat exchanger, the design and calculation of the heat exchanger is simplified, and the factors to be considered in the heat exchange process are increased. In addition, this method establishes different energy flow models through different series and parallel connection methods to simplify the heat exchange process.
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