EP-4737841-A1 - RESONANCE HEAT EXCHANGER

Abstract

The present invention relates to heat exchange devices and can be used in technological processes in energy, utilities, oil refining, petrochemical, chemical, nuclear, refrigeration, gas, cryogenic, and other industries. The resonant heat exchange apparatus comprising a Helmholtz resonator consisting of a chamber with an input for a pulsating gas flow and at least one pipe connected to the output of said chamber of the Helmholtz resonator, and said resonant heat exchange apparatus includes a device for forming a pulsating gas flow connected to the input of said chamber of the Helmholtz resonator, where the natural frequency of said Helmholtz resonator is greater than zero and the quality factor of the resonator is greater than one.

Inventors

• Yamileva, Rima

Assignees

• Yamilev Ltd

Dates

Publication Date

20260506

Application Date

20251025

Claims (5)

1. A resonant heat exchange apparatus comprising a Helmholtz resonator consisting of a chamber with an input for a pulsating gas flow and at least one pipe connected to the output of said chamber of the Helmholtz resonator, and said resonant heat exchange apparatus includes a device for forming a pulsating gas flow connected to the input of said chamber of the Helmholtz resonator, where the natural frequency of said Helmholtz resonator is greater than zero and the quality factor of the resonator is greater than one.
2. The resonant heat exchanger according to claim 1, wherein the device for generating the pulsating gas flow is a mechanical gas flow interrupter.
3. The resonant heat exchanger according to claim 1, wherein the device for generating the pulsating gas flow is an internal combustion engine, a compressor with a pulsating gas flow, or a pulsating combustion device.
4. The resonant heat exchanger according to claim 2, wherein a chamber for matching the constant gas flow with the pulsating flow at the inlet of the Helmholtz resonator chamber is installed at the inlet of the mechanical gas flow interrupter.
5. The resonant heat exchanger according to claim 1, wherein at least one tube of the Helmholtz resonator is placed in a vessel with a flowing liquid or gaseous heat transfer medium.

Description

Field of Technology The present invention relates to heat exchangers and can be used in technological processes in energy, utilities, oil refining, petrochemical, chemical, nuclear, refrigeration, gas, cryogenic, and other industries. Background of the Art Various methods for intensifying heat exchange are known and are classified into two categories: 1. Active methods of intensification: vibration of the surface, liquid mixing, etc.; influence on the flow by electric, magnetic, or acoustic fields, pressure pulsations, and others.2. Passive methods, based on the impact on the flow by the shape of the heat exchange surface: use of intensifiers (helical, localized, and plate-type flow swirlers), various types of finning on the heat exchange surface, etc. A known volumetric heat exchanger for self-excited pulsating extended heat exchange includes a housing (1), a separating plate (2), a section (3) for the inlet of the heating medium, a section (4) for the outlet pipe of the heating medium, a section (5) for the inlet of the refrigerant, a section (6) for the outlet of the refrigerant, a heat exchange tube (7), and a hose (8); a flow-limiting valve (10), and a self-oscillating device (12) and a pulsating hydraulic transmission device (13). The separating plate (2) is located within the housing (1), and an opening is formed in the separating plate (2), dividing the housing (1) into an upper chamber and a lower chamber. The upper and lower chambers communicate with each other through openings in the separating plate (2). The refrigerant outlet section (6) communicates with the upper chamber of the housing (1), and the refrigerant inlet section (5) communicates with the lower chamber of the housing (1). The heat exchange tube (7) passes through the opening in the separating plate (2); the inlet end of the heat exchange tube (7) is located within the housing and communicates with the heating medium inlet section (3) through a hose (8); the outlet end of the heat exchange tube (7) is also located within the housing and communicates with the heating medium outlet section (4) through another hose (8). The pulsating hydraulic transmission device (13) consists of an upper cover (13-1), a base (13-2), a diaphragm (13-3), a rigid rod structure (13-4), and a return spring (13-5). The base (13-2) is mounted on the housing (1), and the diaphragm (13-3) is positioned between the upper cover (13-1) and the base (13-2). The base (13-2) has an opening that communicates with the diaphragm (13-3). One end of the rigid rod structure (13-4) passes through the upper cover (13-1) and contacts the diaphragm (13-3), while the other end is attached to the outlet end of the heat exchange tube (7). The return spring (13-5) is additionally provided between the rigid rod structure (13-4) and the upper cover (13-1). The self-oscillating device (12) includes a front nozzle (a), an oscillation chamber (12-2), a rear nozzle (12-3), an output flange (12-4), and a side tube (12-5). The oscillation chamber (12-2) is positioned between the front nozzle (a) and the rear nozzle (12-3), with the rear nozzle (12-3) communicating with an opening. The base (13-2) through the output flange (12-4), and the side connecting pipe (12-5), with the front nozzle (a) equipped with a flow restrictor, and the valve pipeline (10) communicates with the section (4) for the outlet of the heat transfer medium (invention patent CN108645248, published 12.10.2018). A known heat exchanger with pulsating gas supply includes a housing with inlet and outlet nozzles for heat transfer media, heat exchange tubes, and a gas flow interrupter in the form of a shaft with a blade wheel. The shaft is fitted with a sleeve that encloses it, allowing movement relative to its axis. The blade wheel is fixed on the mentioned sleeve, and two perforated disks are placed on the shaft with a gap between them before the heat exchange tubes. One of these disks is stationary relative to the walls of the housing, while the other is rotatable (invention patent RU2047080, published 27.10.1995). Another known heat exchanger with pulsating gas supply includes an impulse tube (30) containing heat exchangers (16), (18), (22), (26). The heat exchanger also includes a reservoir (28) and is equipped with variable acoustic impedance connecting the impulse tube (30) and the reservoir (28). The variable acoustic impedance consists of two or more variable resistances, which may include variable inertia of the tube (32) and valves (13) that create elements with variable resistance. Pulsating gas flow is supplied from a compressor (14) or a thermoacoustic engine (invention patent WO1998000677A1, published 1998-01-08). The common drawbacks of these known devices are complex design and insufficient heat transfer efficiency. Objective of the Invention The objective of the claimed invention is to significantly improve heat exchange efficiency and simplify the design. Essence of the Invention The technical result is ac