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

doi:10.11949/0438-1157.20190980

Abstract

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

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

CLC Number:

TK 172

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.

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.

Figures/Tables 11

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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

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

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	—	—

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	—	—

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