A component-adjustable carnot cell system coupled with low-grade waste heat
By using a Carnot battery system with adjustable composition, combined with heat pump, thermal storage and thermal engine subsystems, the working fluid composition can be adjusted to adapt to different conditions, thus solving the problem of low efficiency of Carnot battery systems under varying operating conditions and achieving high-efficiency energy storage under all operating conditions.
CN117346387BActive Publication Date: 2026-05-29UNIV OF SCI & TECH OF CHINA
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- UNIV OF SCI & TECH OF CHINA
- Filing Date
- 2023-10-10
- Publication Date
- 2026-05-29
AI Technical Summary
Technical Problem
Existing Carnot battery systems have low energy storage efficiency under varying operating conditions and cannot operate stably.
Method used
The Carnot battery system with adjustable composition is adopted. By coupling the heat pump subsystem, the thermal storage subsystem, the heat engine subsystem and the composition control subsystem, the working fluid composition can be adjusted to match different boundary conditions, so as to achieve efficient operation under all working conditions.
Benefits of technology
This achievement enables the Carnot battery system to store energy efficiently under different operating conditions, improving the system's stability and operating efficiency.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN117346387B_ABST
Abstract
The application discloses a component-adjustable Carnot cell system coupled with low-grade waste heat, which is composed of a heat pump subsystem, a heat storage subsystem, a heat engine subsystem and a component control subsystem. First, low-grade waste heat is input into the heat pump subsystem to heat a working medium in a first evaporator, and the working medium is heated to a gas phase, then the working medium is pressurized and heated in a compressor, and then the high-temperature working medium transfers heat to a heat storage medium in a first liquid separator condenser; the high-temperature heat storage medium enters a first heat storage tank to store high-grade heat energy; in the energy release stage, a second pump drives the heat storage medium in the first heat storage tank to enter a second evaporator to transfer the high-grade heat energy to a working medium running in the heat engine subsystem, and then the working medium is expanded in an expander to do work and deliver electric energy to the outside. When the boundary conditions of the system operation change, the component control subsystem can change the working medium running components of the heat engine subsystem and the heat pump subsystem to make the subsystems optimally operate.
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Citation Information
Patent Citations
Heat integration in coal gasification and methanation reaction process
CN104910985A
Carnot cell energy storage system and method of use
CN115095402A