Heat storage system

By introducing a heat storage and release system into thermal power generating units, the problems of steam volume and feedwater temperature during rapid ramp-up have been solved, achieving efficient energy regulation and power generation capacity enhancement.

CN224470209UActive Publication Date: 2026-07-07GUODIAN LONGYUAN ENERGY SAVING TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
GUODIAN LONGYUAN ENERGY SAVING TECH
Filing Date
2025-08-19
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

During the ramp-up process of thermal power generating units, existing technologies make it difficult to increase power generation during rapid ramp-up. Conventional steam extraction heating feedwater mode leads to a reduction in steam volume or a drop in feedwater temperature, affecting the ramp-up rate and fuel consumption.

Method used

A heat storage and release system is adopted, including a feedwater pump, an economizer, and a heat storage and release device. The high-temperature feedwater heat energy is stored through the first heat exchange loop, and the heat energy is released through the second heat exchange loop to preheat the low-temperature feedwater. Combined with control valves and circulating pumps, flexible adjustment and efficient utilization of heat energy can be achieved.

Benefits of technology

When the unit is climbing, reduce the steam extraction of the high-pressure heater, use the stored heat energy to preheat the feedwater, increase the power generation, avoid boiler fuel consumption and steam parameter lag, and improve the unit's climbing rate and energy utilization efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

A heat storage and release system, belonging to the technical field of thermal power generation and thermal systems, includes a feedwater pump, an economizer, and a heat storage and release device. The economizer is located downstream of the feedwater pump along the feedwater flow direction, and its inlet is connected to the feedwater pump outlet via a main pipeline. The heat storage and release device has a heat storage structure and integrates a first heat exchange loop and a second heat exchange loop. The first heat exchange loop is a heat storage loop, with one end connected to the economizer outlet pipeline and the other end connected to the feedwater pump outlet pipeline. It is used to introduce a portion of the high-temperature feedwater from the economizer outlet into the heat storage and release device, where it exchanges heat with the heat storage structure through the first heat exchange loop to store thermal energy. The second heat exchange loop is a heat release loop, with one end connected to the economizer inlet pipeline and the other end connected to the feedwater pump outlet pipeline. It is used to introduce a portion of the low-temperature feedwater output from the feedwater pump into the heat storage and release device, where it exchanges heat with the heat storage structure through the second heat exchange loop. The stored thermal energy is used to preheat the low-temperature feedwater before it is sent to the economizer.
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