Oscillatory heat transfer characteristics of supercritical water in parallel channels

doi:10.11949/j.issn.0438-1157.20181491

Abstract

Abstract:

The oscillatory heat transfer characteristics of supercritical water in vertical upward parallel channels were experimentally investigated under the condition of pressure from 26—30 MPa, time-averaged mass flow rate of 420 kg·m^-2·s^-1 and heat flux from 0—130 kW·m^-2. According to the experimental results, the effects of mass flow rate oscillation on wall temperature, oscillatory amplitude ratio ( A_f ) and oscillatory frequency number ( Wo ) on time-averaged Nusselt number were analyzed, and the time-averaged Nu of oscillatory flow was compared with the supercritical heat transfer correlation equations. The results show that the wall temperature fluctuates with mass flow rate oscillation at the same oscillatory period and opposite phase, and the larger amplitude of mass flow rate oscillation leads to the stronger fluctuation of wall temperature. At the occurrence of low frequency oscillation, the time-averaged Nu decreases with the increase of oscillatory amplitude ratio, and decreases firstly with the increase of oscillatory frequency number and then remains constant. At the occurrence of high frequency oscillation, the time-averaged Nu increases slowly with the increase of oscillatory amplitude ratio, and decreases with the increase of oscillatory frequency number. The values of Nu predicted by correlations is generally higher than that of experiments.

Key words: supercritical water, heat transfer, riser, oscillatory amplitude ratio, oscillatory frequency number, oscillation of wall temperature

摘要：

在压力26~30 MPa，时均质量流速420 kg·m^-2·s^-1、热通量0~130 kW·m^-2工况范围内，对垂直上升并联双通道内超临界水的脉动传热特性进行了实验研究。根据实验数据分析了流量脉动对壁温的影响，脉动振幅率(A_f)和脉动频率数（Wo）对时均Nusselt数的影响，并将脉动时均Nu与超临界传热关联式进行了比较。结果表明：壁温随流量脉动而波动，脉动周期相同，相位相反，流量脉动振幅越大，壁温波动也越大；低频脉动时均Nu随脉动振幅率的增大逐渐减小，随脉动频率数的增大先减小后基本不变；高频脉动时均Nu随脉动振幅率的增大而缓慢增大，随脉动频率数的增大而减小；关联式预测的Nu较实验值普遍偏高。

关键词: 超临界水, 传热, 上升管, 脉动振幅率, 脉动频率数, 壁温脉动

CLC Number:

TK 124

Ziyu LIANG, Li WAN, Juan LI, Xihong ZHOU, Dong YANG. Oscillatory heat transfer characteristics of supercritical water in parallel channels[J]. CIESC Journal, 2019, 70(7): 2488-2495.

梁梓宇, 万李, 李娟, 周熙宏, 杨冬. 并联双通道内超临界水的脉动传热特性[J]. 化工学报, 2019, 70(7): 2488-2495.

Figures/Tables 13

Fig.1 Components of experimental loop

Fig.2 Test section structure

Fig.3 Variation of wall temperature and mass flow rate with time during oscillation process

Fig.4 Variation of wall temperature amplitude with changes of oscillatory amplitude ratio

Fig.5 Variation of time-averaged Nu with changes of time-averaged Re

Fig.6 Variation of time-averaged Nu with changes of oscillatory frequency number

Fig.7 Variation of time-averaged Nu number with changes of oscillatory amplitude ratio

Fig.8 Variation of wall temperature and mass flow rate with time during oscillation process

Fig.9 Variation of wall temperature amplitude with changes of oscillatory amplitude ratio

Fig.10 Variation of time-averaged Nu number with changes of time-averaged Re

Fig.11 Variation of time-averaged Nu with changes of oscillatory frequency number

Fig.12 Variation of time-averaged Nu with changes of ratio of oscillatory amplitude Af

Fig.13 Comparison of time-averaged Nu with value of heat transfer correlations

References 30

1	WangW S, LuoY S, ChenT K, et al. Experimental study of heat transfer characteristics under supercritical pressure of upwards inclined rifled tubes[J]. Power Engineering, 2005, 25(6): 790-793.
2	YangD, PanJ, ZhouC Q, et al. Experimental investigation on heat transfer and frictional characteristics of vertical upward rifled tube in supercritical CFB boiler [J]. Experimental Thermal and Fluid Science, 2011, 35(2): 291-300.
3	潘杰, 杨冬, 朱探, 等. 超临界压力水在垂直上升内螺纹管中的传热特性[J]. 化工学报, 2011, 62(2): 307-314.
	PanJ, YangD, ZhuT, et al. Heat transfer characteristics of supercritical pressure water in vertical upward rifled tube[J]. CIESC Journal, 2011, 62(2): 307-314.
4	LiuL, XiaoZ, YanX, et al. Heat transfer deterioration to supercritical water in circular tube and annular channel[J]. Nuclear Engineering and Design, 2013, 255: 97-104.
5	LiZ, WuY, TangG, et al. Comparison between heat transfer to supercritical water in a smooth tube and in an internally ribbed tube [J]. International Journal of Heat and Mass Transfer, 2015, 84: 529-541.
6	ZhangW Q, LiH X, ZhangQ, et al. Experimental investigation on heat transfer deterioration of supercritical pressure water in vertically-upward internally-ribbed tubes[J]. International Journal of Heat and Mass Transfer, 2018, 120: 930-943.
7	沈植, 杨冬, 陈功名, 等. 高温高压水在垂直下降管内的传热特性[J]. 化工学报, 2013, 64(7): 2386-2393.
	ShenZ, YangD, ChenG M, et al. Heat transfer characteristics of high temperature and pressure water in vertical downward tube[J]. CIESC Journal, 2013, 64(7): 2386-2393.
8	QuM F, YangD, LiangZ Y, et al. Experimental and numerical investigation on heat transfer of ultra-supercritical water in vertical upward tube under uniform and non-uniform heating[J]. International Journal of Heat and Mass Transfer, 2018, 127: 769-783.
9	冯自平, 郭烈锦, 陈学俊. 卧式螺旋管压力降脉动瞬态及时均传热特性研究[J]. 核科学与工程, 1998, 18(1): 1-7.
	FengZ P, GuoL J, ChenX J. Transient and time-averaged heat transfer characteristics of pressure-drop oscillation in horizontal helically coiled tube[J]. Chinese Journal of Nuclear Science and Engineering, 1998, 18(1): 1-7.
10	冯自平, 郭烈锦.螺旋管内汽液两相流第二区压力降脉动瞬态及时均传热规律[J]. 化工学报, 2000, 51(3): 353-357.
	FengZ P, GuoL J. Transient and time-averaged oscillatory heat transfer of two-phase flow during second regional pressure-drop oscillation in helical coiled tube[J]. Journal of Chemical Industry and Engineering (China), 2000, 51(3): 353-357.
11	郭烈锦, 冯自平. 螺旋管内汽液两相流热力型脉动瞬态及时均传热[J]. 西安交通大学学报, 1999, 33(9): 39-42.
	GuoL J, FengZ P. Transient and time-averaged heat transfer of steam water two-phase oscillatory flow in helical coiled tubing boiler-reactor[J]. Journal of Xi'an Jiaotong University, 1999, 33(9): 39-42.
12	冯自平, 郭烈锦. 螺旋管内汽液两相流密度波型脉动流动传热试验研究[J]. 核科学与工程, 1999, 19(4): 296-302.
	FengZ P, GuoL J. An experimental investigation of oscillatory heat transfer in helical coiled tube with steam water two-phase density wave oscillation flow[J]. Chinese Journal of Nuclear Science and Engineering, 1999, 19(4): 296-302.
13	ChenC A, ChangW R, LinT F. Time periodic flow boiling heat transfer of R-134a and associated bubble characteristics in a narrow annular duct due to flow rate oscillation[J]. International Journal of Heat and Mass Transfer, 2010, 53: 3593-3606.
14	WangS L, ChenC A, LinT F. Oscillatory subcooled flow boiling heat transfer of R-134a and associated bubble characteristics in a narrow annular duct due to flow rate oscillation[J]. International Journal of Heat and Mass Transfer, 2013, 63: 255-267.
15	ChenC A, LinT F, YanW M, et al. Time periodic evaporation heat transfer of R-134a in a narrow annular duct due to mass flow rate oscillation [J]. International Journal of Heat and Mass Transfer, 2018, 118: 154-164.
16	MikkelS, DoraoC A. Experimental study of the heat transfer coefficient deterioration during density wave oscillations[J]. Chemical Engineering Science, 2015, 132: 178-185.
17	郭烈锦, 冯自平. 螺旋管内单相液体紊流脉动流动传热[J]. 化工学报, 2000, 51(2): 159-164.
	GuoL J, FengZ P. Oscillation heat transfer in helically coiled tube with fully developed turbulent oscillation flow[J]. Journal of Chemical Industry and Engineering (China), 2000, 51(2): 159-164.
18	李思文, 李华, 杨臧健, 等. 光管内湍流脉动传热影响因素的实验研究[J]. 浙江工业大学学报, 2013, 41(4): 395-399.
	LiS W, LiH, YangZ J, et al. Experimental study on influencing factors of pulsating heat transfer in turbulent flow in a pipe[J]. Journal of Zhejiang University of Technology, 2013, 41(4): 395-399.
19	杨卫卫, 何雅玲, 陶文铨, 等. 凹槽通道中脉动流动强化传质的数值研究[J]. 西安交通大学学报, 2004, 38(11): 1119-1122.
	YangW W, HeY L, TaoW Q, et al. Numerical study on enhancing mass transfer in grooved channel by pulsating flow[J]. Journal of Xi'an Jiaotong University, 2004, 38(11): 1119-1122.
20	胡玉生. 流体脉动强化对流换热的数值模拟[D]. 重庆: 重庆大学, 2005.
	HuY S. Numerical simulation of heat transfer enhancement with pulsating flow[D]. Chongqing : Chongqing University, 2005.
21	JinD X, LeeY P, LeeD Y. Effects of the pulsating flow agitation on the heat transfer in a triangular grooved channel [J]. International Journal of Heat and Mass Transfer, 2007, 50(15): 3062-3071.
22	ElshafeiE A M, SafwatM M, MansourH, et al. Experimental study of heat transfer in pulsating turbulent flow in a pipe[J]. International Journal of Heat and Fluid Flow, 2008, 29(4): 1029-1038.
23	TerhaarS, VelazquezA, AriasJ R, et al. Experimental study on the unsteady laminar heat transfer downstream of a backwards facing step [J]. International Communications in Heat and Mass Transfer, 2010, 37(5): 457-462.
24	YuJ C, LiZ X, ZhaoT S. An analytical study of pulsating laminar heat convection in a circular tube with constant heat flux [J]. International Journal of Heat and Mass Transfer, 2004, 47(24): 5297-5301.
25	WangX, ZhangN. Numerical analysis of heat transfer in pulsating turbulent flow in a pipe [J]. International Journal of Heat & Mass Transfer, 2005, 48(19): 3957-3970.
26	MiropolskiiL, ShitsmanM. Heat transfer to water and steam at variable specific heat(in near critical region)[J]. Soviet, Physcis-Technical Physics, 1957, 2: 2196-2208.
27	BishopA, SandbergR, TongL. Forced convention heat transfer to water at near-critical temperature and super-critical pressures[R]. Report WCAP 2056. Pittsburgh: Westinghouse Electic Corporation, 1964.
28	SwensonH, CarverJ, KakaralaC. Heat transfer to supercritical water in smooth-bore tubes[J]. Journal of Heat Transfer, 1965, 87(4): 477-4833.
29	JacksonJ. Consideration of the heat transfer properties of supercritical water in connection with the advanced nuclear reactors[C]//13th Pacific Basin Nuclear Conference. Shenzhen, 2002.
30	MokryS, PioroI, FarahA, et al. Development of supercritical water heat-transfer correlation for vertical bare tubes[J]. Nuclear Engineering and Design, 2011, 241(4): 1126-1136.

[1]	Shuangxing ZHANG, Fangchen LIU, Yifei ZHANG, Wenjing DU. Experimental study on phase change heat storage and release performance of R-134a pulsating heat pipe [J]. CIESC Journal, 2023, 74(S1): 165-171.
[2]	Yifei ZHANG, Fangchen LIU, Shuangxing ZHANG, Wenjing DU. Performance analysis of printed circuit heat exchanger for supercritical carbon dioxide [J]. CIESC Journal, 2023, 74(S1): 183-190.
[3]	Aiqiang CHEN, Yanqi DAI, Yue LIU, Bin LIU, Hanming WU. Influence of substrate temperature on HFE7100 droplet evaporation process [J]. CIESC Journal, 2023, 74(S1): 191-197.
[4]	Mingxi LIU, Yanpeng WU. Simulation analysis of effect of diameter and length of light pipes on heat transfer [J]. CIESC Journal, 2023, 74(S1): 206-212.
[5]	Zhiguo WANG, Meng XUE, Yushuang DONG, Tianzhen ZHANG, Xiaokai QIN, Qiang HAN. Numerical simulation and analysis of geothermal rock mass heat flow coupling based on fracture roughness characterization method [J]. CIESC Journal, 2023, 74(S1): 223-234.
[6]	Cheng CHENG, Zhongdi DUAN, Haoran SUN, Haitao HU, Hongxiang XUE. Lattice Boltzmann simulation of surface microstructure effect on crystallization fouling [J]. CIESC Journal, 2023, 74(S1): 74-86.
[7]	Yitong LI, Hang GUO, Hao CHEN, Fang YE. Study on operating conditions of proton exchange membrane fuel cells with non-uniform catalyst distributions [J]. CIESC Journal, 2023, 74(9): 3831-3840.
[8]	Yubing WANG, Jie LI, Hongbo ZHAN, Guangya ZHU, Dalin ZHANG. Experimental study on flow boiling heat transfer of R134a in mini channel with diamond pin fin array [J]. CIESC Journal, 2023, 74(9): 3797-3806.
[9]	Ke LI, Jian WEN, Biping XIN. Study on influence mechanism of vacuum multi-layer insulation coupled with vapor-cooled shield on self-pressurization process of liquid hydrogen storage tank [J]. CIESC Journal, 2023, 74(9): 3786-3796.
[10]	Zhewen CHEN, Junjie WEI, Yuming ZHANG. System integration and energy conversion mechanism of the power technology with integrated supercritical water gasification of coal and SOFC [J]. CIESC Journal, 2023, 74(9): 3888-3902.
[11]	Cong QI, Zi DING, Jie YU, Maoqing TANG, Lin LIANG. Study on solar thermoelectric power generation characteristics based on selective absorption nanofilm [J]. CIESC Journal, 2023, 74(9): 3921-3930.
[12]	Yue YANG, Dan ZHANG, Jugan ZHENG, Maoping TU, Qingzhong YANG. Experimental study on flash and mixing evaporation of aqueous NaCl solution [J]. CIESC Journal, 2023, 74(8): 3279-3291.
[13]	Tianhua CHEN, Zhaoxuan LIU, Qun HAN, Chengbin ZHANG, Wenming LI. Research progress and influencing factors of the heat transfer enhancement of spray cooling [J]. CIESC Journal, 2023, 74(8): 3149-3170.
[14]	Rui HONG, Baoqiang YUAN, Wenjing DU. Analysis on mechanism of heat transfer deterioration of supercritical carbon dioxide in vertical upward tube [J]. CIESC Journal, 2023, 74(8): 3309-3319.
[15]	Hai WANG, Hong LIN, Chen WANG, Haojie XU, Lei ZUO, Junfeng WANG. Investigation of enhanced boiling heat transfer on porous structural surfaces by high voltage electric field [J]. CIESC Journal, 2023, 74(7): 2869-2879.