CN109441640B - Plate-fin regenerator shell for helium turbine - Google Patents

Plate-fin regenerator shell for helium turbine Download PDF

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CN109441640B
CN109441640B CN201811591661.0A CN201811591661A CN109441640B CN 109441640 B CN109441640 B CN 109441640B CN 201811591661 A CN201811591661 A CN 201811591661A CN 109441640 B CN109441640 B CN 109441640B
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cavity
shell
helium
plate
regenerator
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CN109441640A (en
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李贝贝
庄重
马建强
原文祺
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703th Research Institute of CSIC
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/08—Heating air supply before combustion, e.g. by exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

A plate-fin regenerator shell for a helium turbine relates to a plate-fin regenerator shell. The invention aims to solve the problems that the internal space of the heat regenerator cannot be fully utilized, helium is unevenly distributed, the heat exchange efficiency of the heat regenerator is low, the volume of a core body structure is overlarge, and the welding difficulty of fins is increased. The utility model provides a plate-fin type regenerator shell for helium turbine comprises shell, first air conditioning intake pipe, second air conditioning intake pipe, first air conditioning outlet duct, second air conditioning outlet duct, steam intake pipe and baffle, the shell cross section be trapezoidal, the inside extension degree direction of shell sets up first cavity and second cavity, and first cavity and second cavity set up side by side, set up the baffle between first cavity and the second cavity, just first cavity and second cavity be the cuboid cavity. The invention is suitable for the plate-fin heat regenerator shell of the helium turbine.

Description

Plate-fin regenerator shell for helium turbine
Technical Field
The invention relates to a plate-fin regenerator shell.
Background
The heat regenerator of the helium turbine is arranged between a high-pressure compressor and a turbine of the helium turbine and is limited by the size of an outer shell, and meanwhile, the heat regenerator is arranged into a plurality of modules and is uniformly arranged in the shell of the helium turbine in consideration of the limitation of an inflow pipeline of high-temperature helium gas entering the turbine from a reactor and a pipeline of low-temperature helium gas entering and exiting the heat regenerator. The cross section of the shell of the existing single-module heat regenerator is trapezoidal, but the core structure of the heat regenerator cannot be consistent with the shell structure of the single-module heat regenerator, so that the inner space of the heat regenerator cannot be fully utilized, the existing helium turbine heat regenerator has the problems of uneven helium distribution, lower heat exchange efficiency (85% -90%) of the helium turbine heat regenerator, and excessively large increase in the volume of the core structure and the welding difficulty of fins.
Disclosure of Invention
The invention aims to solve the problems that the internal space of a regenerator cannot be fully utilized, helium is unevenly distributed, the heat exchange efficiency of the regenerator is low, the volume of a core body structure is overlarge, and the welding difficulty of fins is increased, and provides a plate-fin type regenerator shell for a helium turbine.
A plate-fin heat regenerator shell for a helium turbine comprises a shell, a first cold air inlet pipe, a second cold air inlet pipe, a first cold air outlet pipe, a second cold air outlet pipe, a hot air inlet pipe and a partition plate, wherein the cross section of the shell is trapezoidal, a first cavity and a second cavity are arranged in the direction of the extension degree in the shell, the first cavity and the second cavity are arranged in parallel, the partition plate is arranged between the first cavity and the second cavity, and the first cavity and the second cavity are cuboid cavities; the side lengths of the cross sections of the first cavities are respectively L1And K1(ii) a The side lengths of the cross sections of the second cavities are respectively L2And K2(ii) a Said L1:K 11, (0.7-0.8); said L2:K 21, (0.9-1.0); said L1:K2＝1:(0.7～0.8)；
The shell top set up the steam outlet duct, the shell bottom set up with the steam intake pipe, first cavity upper portion sets up first air conditioning intake pipe, first cavity lower part sets up first air conditioning outlet duct, second cavity upper portion sets up the second air conditioning intake pipe, the second cavity lower part sets up the second air conditioning outlet duct.
The invention has the advantages that:
1. the design size of a single module regenerator can be determined according to the overall arrangement of the regenerator modules. Meanwhile, the helium can flow more uniformly in the core section of the heat regenerator, the single-module heat regenerator is designed into a two-end air inlet type, the single module of the heat regenerator is divided into two small modules for design calculation, and the two small modules are separated by the partition plate.
2. Because the section of the shell of the heat regenerator is trapezoidal, and the core structure of the conventional heat regenerator cannot be consistent with the shell structure, the internal space of the heat regenerator cannot be fully utilized, and the welding difficulty of fins is increased due to the overlarge volume of the core structure, the heat regenerator is designed into two modules, namely the core structures are respectively arranged in the first cavity 1-1 and the second cavity 1-2, the volume of a single core structure is reduced, and the fin welding process is improved.
3. The structures of the two modules conform to the regenerator shell as much as possible, the internal space of the regenerator is fully utilized, the heat exchange area is increased, and the problem of uneven helium distribution can be effectively solved although the structural arrangement is complex, so that the heat exchange efficiency of the helium turbine regenerator is improved.
4. The core body structure of the prior heat regenerator is overlarge in volume, and when gas enters along the cross section direction of the heat regenerator, the gas firstly generates uneven airflow distribution at a transverse distance, so that the heat exchange efficiency of a heat regenerator module is low.
5. The heat exchange efficiency of the plate-fin heat regenerator shell for the helium turbine is more than 95%.
Drawings
FIG. 1 is a schematic structural view of a plate-fin regenerator casing for a helium gas turbine according to the present invention;
FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;
FIG. 3 is a cross-sectional view of a plate fin regenerator housing for a helium gas turbine in accordance with the present invention;
fig. 4 is a rear view of fig. 1.
Detailed Description
The first embodiment is as follows: with reference to fig. 1 to 4, the present embodiment is a plate-fin regenerator casing for a helium gas turbine, which is composed of a casing 1, a first cold air inlet pipe 2-1, a second cold air inlet pipe 2-2, a first cold air outlet pipe 3-1, a second cold air outlet pipe 3-2, a hot air outlet pipe 4, a hot air inlet pipe 5, and a partition plate 6, wherein the cross section of the casing 1 is trapezoidal, a first cavity 1-1 and a second cavity 1-2 are arranged in the direction of the extension degree of the inside of the casing 1, the first cavity 1-1 and the second cavity 1-2 are arranged in parallel, the partition plate 6 is arranged between the first cavity 1-1 and the second cavity 1-2, and the first cavity 1-1 and the second cavity 1-2 are rectangular cavities; the side lengths of the cross sections of the first cavities 1-1 are respectively L1And K1(ii) a The side lengths of the cross sections of the second cavities 1-2 are respectively L2And K2(ii) a Said L1:K 11, (0.7-0.8); said L2:K 21, (0.9-1.0); said L1:K2＝1:(0.7～0.8)；
The top of the shell 1 is provided with a hot air outlet pipe 4, the bottom of the shell 1 is provided with a hot air inlet pipe 5, the upper part of the first cavity 1-1 is provided with a first cold air inlet pipe 2-1, the lower part of the first cavity 1-1 is provided with a first cold air outlet pipe 3-1, the upper part of the second cavity 1-2 is provided with a second cold air inlet pipe 2-2, and the lower part of the second cavity 1-2 is provided with a second cold air outlet pipe 3-2.
The advantages of the present embodiment:
1. the design size of a single module regenerator can be determined according to the overall arrangement of the regenerator modules. Meanwhile, the helium can flow more uniformly in the core section of the heat regenerator, the single-module heat regenerator is designed into a two-end air inlet type, the single module of the heat regenerator is divided into two small modules for design calculation, and the two small modules are separated by the partition plate.
2. Because the section of the shell of the heat regenerator is trapezoidal, and the core structure of the conventional heat regenerator cannot be consistent with the shell structure, the internal space of the heat regenerator cannot be fully utilized, and the core structure has an excessively large volume, which increases the welding difficulty of fins, the heat regenerator is designed into two modules, namely, the core structures are respectively arranged in the first cavity 1-1 and the second cavity 1-2, so that the volume of a single core structure is reduced, and the fin welding process is improved.
3. The structures of the two modules conform to the regenerator shell as much as possible, the internal space of the regenerator is fully utilized, the heat exchange area is increased, and the problem of uneven helium distribution can be effectively solved although the structural arrangement is complex, so that the heat exchange efficiency of the helium turbine regenerator is improved.
4. The heat regenerator has the advantages that the volume of the core body structure of the existing heat regenerator is too large, when gas enters along the cross section direction of the heat regenerator, the gas is firstly unevenly distributed at the transverse distance to generate air flow, so that the heat exchange efficiency of a heat regenerator module is low, the volume of a single core body is reduced through the design of two modules, the flow distance of the air flow is reduced, the uniformity of temperature distribution is improved, and the heat exchange efficiency is increased.
5. The heat exchange efficiency of the plate-fin heat regenerator shell for the helium turbine is more than 95%.
The second embodiment is as follows: the present embodiment differs from the first embodiment in that: said L1:K 11, (0.7-0.73). The rest is the same as the first embodiment.
The third concrete implementation mode: the present embodiment differs from the first or second embodiment in that: said L2:K21 (0.9-0.995). The others are the same as in the first or second embodiment.
The fourth concrete implementation mode: the difference between this embodiment and one of the first to third embodiments is as follows: said L1:K21 (0.7-0.79). The others are the same as the first to third embodiments.
The fifth concrete implementation mode: the difference between this embodiment and one of the first to fourth embodiments is: the length L of the cross section of the first cavity 1-11547mm, side length K1398 mm. The rest is the same as the first to fourth embodiments.
The sixth specific implementation mode: the difference between this embodiment and one of the first to fifth embodiments is as follows: the length L of the cross section of the second cavity 1-22435mm, side length K2Is 433 mm. The others are different from the first to fifth embodiments.
The seventh embodiment: the difference between this embodiment and one of the first to sixth embodiments is: the cold end helium flow of the first cavity 1-1 is 4.6kg/s, and the hot end helium flow is 4.63 kg/s. The rest is the same as the first to sixth embodiments.
The specific implementation mode is eight: the difference between this embodiment and one of the first to seventh embodiments is: the cold end helium flow of the second cavity 1-2 is 3.98kg/s, and the hot end helium flow is 4 kg/s. The rest is the same as the first to seventh embodiments.
The following tests are adopted to verify the effect of the invention:
the first embodiment is as follows: referring to fig. 1 to 4, a plate-fin regenerator casing for a helium gas turbine of the present embodiment comprises a casing 1, a first cool air inlet pipe 2-1, and a second cool air inlet pipeThe air conditioner comprises a pipe 2-2, a first cold air outlet pipe 3-1, a second cold air outlet pipe 3-2, a hot air outlet pipe 4, a hot air inlet pipe 5 and a partition plate 6, wherein the cross section of a shell 1 is trapezoidal, a first cavity 1-1 and a second cavity 1-2 are arranged in the extension direction in the shell 1, the first cavity 1-1 and the second cavity 1-2 are arranged in parallel, the partition plate 6 is arranged between the first cavity 1-1 and the second cavity 1-2, and the first cavity 1-1 and the second cavity 1-2 are cuboid cavities; the side lengths of the cross sections of the first cavities 1-1 are respectively L1And K1(ii) a The side lengths of the cross sections of the second cavities 1-2 are respectively L2And K2；L1Is 547mm, K1398 mm; l is2435mm, K2Is 433 mm;
the top of the shell 1 is provided with a hot air outlet pipe 4, the bottom of the shell 1 is provided with a hot air inlet pipe 5, the upper part of the first cavity 1-1 is provided with a first cold air inlet pipe 2-1, the lower part of the first cavity 1-1 is provided with a first cold air outlet pipe 3-1, the upper part of the second cavity 1-2 is provided with a second cold air inlet pipe 2-2, and the lower part of the second cavity 1-2 is provided with a second cold air outlet pipe 3-2.
The method comprises the following steps that a helium turbine regenerator is arranged between a compressor and a turbine of the helium turbine and is limited by the size of an outer shell, meanwhile, the regenerator is arranged into 18 modules in consideration of the limitation of an inflow pipeline of high-temperature helium gas entering the turbine from a reactor and a pipeline of low-temperature helium gas entering and exiting the regenerator, each module is composed of a plate-fin regenerator shell and a core body for the helium turbine, and the core body is a plate-fin core body;
the plate-fin type cores are respectively arranged in the first cavity 1-1 and the second cavity 1-2, the high-temperature flow channels of the two plate-fin type cores are communicated with a hot gas outlet pipe 4 and a hot gas inlet pipe 5, the low-temperature flow channel of the plate-fin type core in the first cavity 1-1 is communicated with a first cold gas inlet pipe 2-1 and a first cold gas outlet pipe 3-1, and the low-temperature flow channel of the plate-fin type core in the second cavity 1-2 is communicated with a second cold gas inlet pipe 2-2 and a second cold gas outlet pipe 3-2.
First cavity 1-1: the cold end helium flow was 4.6kg/s and the hot end helium flow was 4.63 kg/s. The heat exchange efficiency calculation was performed for the first cavity 1-1 as shown in table 1 below.
Second cavity 1-2: the cold end helium flow was 3.98kg/s and the hot end helium flow was 4 kg/s.
TABLE 1
Figure BDA0001920410700000041
The heat exchange efficiency of the helium turbine heat regenerator in the embodiment can reach 95%.

Claims (8)

1. A plate-fin heat regenerator shell for a helium turbine is characterized by comprising a shell (1), a first cold air inlet pipe (2-1), a second cold air inlet pipe (2-2), a first cold air outlet pipe (3-1), a second cold air outlet pipe (3-2), a hot air outlet pipe (4), a hot air inlet pipe (5) and a partition plate (6), the cross section of the shell (1) is trapezoidal, a first cavity (1-1) and a second cavity (1-2) are arranged in the shell (1) along the extension direction, the first cavity (1-1) and the second cavity (1-2) are arranged in parallel, a clapboard (6) is arranged between the first cavity (1-1) and the second cavity (1-2), the first cavity (1-1) and the second cavity (1-2) are cuboid cavities; the side lengths of the cross sections of the first cavities (1-1) are respectively L1And K1(ii) a The side lengths of the cross sections of the second cavities (1-2) are respectively L2And K2(ii) a Said L1:K11, (0.7-0.8); said L2:K21, (0.9-1.0); said L1:K21, (0.7-0.8); side length of L1And K2Is substantially parallel to the trapezoidal base, the side length being K2Is close to the upper bottom of the trapezoid, and the side length is L1The side of (a) is close to the lower bottom of the trapezoid;
the air conditioner is characterized in that a hot air outlet pipe (4) is arranged at the top of the shell (1), a hot air inlet pipe (5) is arranged at the bottom of the shell (1), a first cold air inlet pipe (2-1) is arranged at the upper part of the first cavity (1-1), a first cold air outlet pipe (3-1) is arranged at the lower part of the first cavity (1-1), a second cold air inlet pipe (2-2) is arranged at the upper part of the second cavity (1-2), and a second cold air outlet pipe (3-2) is arranged at the lower part of the second cavity (1-2).
2. The plate fin regenerator housing for a helium gas turbine as claimed in claim 1, wherein L is1:K1＝1:(0.7～0.73)。
3. The plate fin regenerator housing for a helium gas turbine as claimed in claim 1, wherein L is2:K2＝1:(0.9～0.995)。
4. The plate fin regenerator housing for a helium gas turbine as claimed in claim 1, wherein L is1:K2＝1:(0.7～0.79)。
5. A plate fin regenerator housing for a helium gas turbine as claimed in claim 1, wherein said first cavity (1-1) has a cross-sectional side length L1547mm, side length K1398 mm.
6. Plate-fin regenerator housing for helium gas turbines as claimed in claim 1, characterized in that the second cavity (1-2) has a cross-sectional side length L2435mm, side length K2Is 433 mm.
7. The plate fin regenerator housing for helium turbine as claimed in claim 1, wherein the cold end helium flow rate of the first cavity (1-1) is 4.6kg/s and the hot end helium flow rate is 4.63 kg/s.
8. The plate fin regenerator housing for helium turbine as claimed in claim 1, wherein the cold end helium flow rate of the second cavity (1-2) is 3.98kg/s and the hot end helium flow rate is 4 kg/s.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109827796A (en) * 2019-03-29 2019-05-31 北京航空航天大学 A test bench for performance testing of micro gas turbine regenerator units

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2097998U (en) * 1991-07-15 1992-03-04 沈阳黎明发动机制造公司工程机械厂 Unequal-sectional plate type heat exchanger
JPH06281368A (en) * 1993-03-31 1994-10-07 Sumitomo Cement Co Ltd Packed bed type heat exchanger
JP2006177621A (en) * 2004-12-22 2006-07-06 Denso Corp Heat exchanger
CN1936302A (en) * 2006-10-13 2007-03-28 西安交通大学 Process for processing ring-shape original surface heat regenerator for minisize gas turbine
CN101245947A (en) * 2007-11-30 2008-08-20 华南理工大学 A heat exchanger for a plate type gas water heater
CN205897945U (en) * 2016-07-22 2017-01-18 新乡豫新车辆换热设备股份有限公司 Plate finned heat exchanger

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2097998U (en) * 1991-07-15 1992-03-04 沈阳黎明发动机制造公司工程机械厂 Unequal-sectional plate type heat exchanger
JPH06281368A (en) * 1993-03-31 1994-10-07 Sumitomo Cement Co Ltd Packed bed type heat exchanger
JP2006177621A (en) * 2004-12-22 2006-07-06 Denso Corp Heat exchanger
CN1936302A (en) * 2006-10-13 2007-03-28 西安交通大学 Process for processing ring-shape original surface heat regenerator for minisize gas turbine
CN101245947A (en) * 2007-11-30 2008-08-20 华南理工大学 A heat exchanger for a plate type gas water heater
CN205897945U (en) * 2016-07-22 2017-01-18 新乡豫新车辆换热设备股份有限公司 Plate finned heat exchanger

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