螺旋扭曲管用于燃气轮机进气温度调节换热器的可行性研究

doi:10.11949/0438-1157.20190980

化工学报 ›› 2020, Vol. 71 ›› Issue (4): 1562-1569.DOI: 10.11949/0438-1157.20190980

螺旋扭曲管用于燃气轮机进气温度调节换热器的可行性研究

涂爱民^1,^2,³,刘世杰^1,^2,³,莫逊^1,^2,³,朱冬生^1,^2,³,尹应德^1,^2,³

^1.中国科学院广州能源研究所，广东广州 510640
^2.中国科学院可再生能源重点实验室，广东广州510640
^3.广东省新能源和可再生能源重点实验室，广东广州 510640

收稿日期:2019-08-30 修回日期:2020-01-21 出版日期:2020-04-05 发布日期:2020-04-05
通讯作者: 刘世杰
作者简介:涂爱民（1971—），男，博士，高级工程师，tuam@ms. giec. ac. cn
基金资助:
中科院可再生能源重点实验室2019—2020年度基金项目;广州市科技计划项目产业技术重大攻关计划项目(201802010022)

Feasibility study of spiral twisted tube for gas turbine inlet temperature regulating heat exchanger

Aimin TU^1,^2,³,Shijie LIU^1,^2,³,Xun MO^1,^2,³,Dongsheng ZHU^1,^2,³,Yinde YIN^1,^2,³

^1.Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong，China
^2.Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China
^3.Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, Guangdong, China

Received:2019-08-30 Revised:2020-01-21 Online:2020-04-05 Published:2020-04-05
Contact: Shijie LIU

摘要/Abstract

摘要：

对将螺旋扭曲管用于燃机进气温度调节换热器进行可行性分析，模拟燃机进气加热器实际运行的工况条件进行综合传热性能实验研究，得到了传热与流阻准则关系式；引入综合评价因子概念并与传统钢铝翅片管换热器进行对比发现，螺旋扭曲管换热器是钢铝翅片管换热器的1.31~1.52倍。以某建设项目采用的E级PG9171E型机组为例，对采用螺旋扭曲管和钢铝翅片管的两种进气温度调节换热器进行对比发现：当采用螺旋扭曲管换热器时，在同样换热能力下，换热器风侧阻力增大了14.7%；在同等质量下，换热器换热能力提高9.9%左右。

关键词: 燃气轮机, 进气加热, 螺旋扭曲管, 双金属型翅片管, 传热, 腐蚀

Abstract:

The feasibility analysis of the use of spiral twisted tubes in gas turbine temperature control heat exchangers was carried out, and the simulation of the actual operating conditions of gas turbine intake heaters was carried out to conduct a comprehensive heat transfer performance experiment. The relationship between heat transfer and flow resistance criteria was obtained. By introducing the concept of comprehensive evaluation factor(η) and comparing the spiral twisted tube heat exchanger with the traditional steel aluminum finned tube heat exchanger, it is found that the value of η of the spiral twisted tube heat exchanger is 1.31—1.52 times of the steel aluminum finned tube heat exchanger. Taking the E-class PG9171E type unit used in a construction project as an example, comparing two kinds of intake air temperature regulating heat exchangers using a spiral twisted tube and a steel aluminum finned tube: when using a spiral twisted tube heat exchanger, under the same heat exchange capacity, the wind side resistance of the heat exchanger increased by 14.7%; under the same mass, the heat exchange capacity of the heat exchanger increased by about 9.9%.

Key words: gas turbine, intake heating, spiral twisted tube, bimetallic finned tube, heat transfer, corrosion

中图分类号:

TK 172

涂爱民, 刘世杰, 莫逊, 朱冬生, 尹应德. 螺旋扭曲管用于燃气轮机进气温度调节换热器的可行性研究[J]. 化工学报, 2020, 71(4): 1562-1569.

Aimin TU, Shijie LIU, Xun MO, Dongsheng ZHU, Yinde YIN. Feasibility study of spiral twisted tube for gas turbine inlet temperature regulating heat exchanger[J]. CIESC Journal, 2020, 71(4): 1562-1569.

图/表 11

图1 螺旋扭曲管结构示意图

Fig.1 Structural sketch of spiral twisted oval tube

图2 一体化管排示意图

Fig.2 Diagram of integrated pipe arrangement

图3 测试系统示意图1—风机；2—孔板；3—数字皮托管风速计；4—换热器；5—水流量计；6—水泵；7—水箱；8—电加热器；9—水温控制器；10—阀门； —温度计； —压差计

Fig.3 Schematic of test system

表1 螺旋扭曲管换热器与钢铝翅片管换热器结构尺寸

Table 1 Structural dimensions of spiral twisted oval tube heat exchangers and steel and aluminum rolled finned tube heat exchangers

管型	基管直径/mm	元件外形特点/mm	横向管间距/mm	纵向管间距/mm	单排管数/排数
螺旋扭曲管	15.9×0.75×1270	长轴/短轴：20.0/8.7	20	25.0	20/8
钢铝翅片管	? 25.0×2.00×1270	片高/片距：16.0/2.5	62	53.7	10/4

表2 测量仪器参数

Table 2 Parameters of measuring instrument

仪器	量程	精度
温度计	-20～120℃	±0.15℃
压差计	0～500 Pa	±1.0 Pa
皮托管风速计	0～500 Pa	±1.0 Pa
流量计	2.0～40.0 m³/h	±0.2 m³/h
Agilent 34970数据记录器	—	—

图4 不同管外空气流速下的总传热系数对比

Fig.4 Comparison of total heat transfer coefficient under different air flow rates outside tube

图5 管外侧传热系数随空气流速的变化

Fig.5 Change of shell side heat transfer coefficient with air velocity

图6 管外侧压降随空气流速的变化

Fig.6 Change of shell side pressure drop with air velocity

图7 管外侧综合性能评价因子随空气流速的变化

Fig.7 Change of shell side comprehensive performance evaluation factor with air velocity

表3 进气加热器设计介质参数（单模块）

Table 3 Intake heater design media parameters(single module)

管内		管外侧
介质	水	介质	热空气
流量/(t/h)	42.9	流量/(kg/s)	63.0
密度/(kg/m³)	987.100	密度/(kg/m³)	1.185
比热容/(J/(kg·℃))	4175	比热容/(J/(kg·℃))	1005
热导率/(W/(m·K))	0.650	热导率/(W/(m·K))	0.026
动力黏度/(Pa·s)	5.34×10^-4	动力黏度/(Pa·s)	1.84×10^-5
进口温度/℃	65	进口温度/℃	15
出口温度/℃	39.5	出口温度/℃	35.0
换热量/W	1268678	换热量/W	1266300

表4 两种换热器的设计计算参数对比（单模块）

Table 4 Comparison of design calculation parameters of two heat exchangers (single module)

参数	翅片管换热器	螺旋扭曲管换热器
管程数	2	1
管内流速/(m/s)	0.53	0.26
管外流速/(m/s)	5.75	8.63
总传热系数/(W/(㎡·K))	26.6	132.0
传热温差/℃	23.9	24.4
换热面积/ m²	91.6（基管）+1999.0（翅片）	439.6
总换热能力/ W	1327065	1415245
空气侧阻力/ Pa	103	126
管规格/mm×mm	25.0×2.00	15.9×0.75
单管长度/m	10.0	10.0
单模块管根数	118	880
单模块总管长度/ m	1180	8800
单模块外形尺寸/ mm×mm×mm	10600×2240×850	10600×2240×850
单模块换热管质量/ kg	2352（含翅片）	2494
单模块总净重/ kg	~5880	~5700

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螺旋扭曲管用于燃气轮机进气温度调节换热器的可行性研究

Feasibility study of spiral twisted tube for gas turbine inlet temperature regulating heat exchanger

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