Straight-through all-glass evacuated tube solar collector for low and medium temperature applications

被引：31

作者：

Gong, Jing-hu ^{[1
,2
]}

Jiang, Zheng ^{[1
,2
]}

Luo, Xian-feng ^{[1
,2
]}

Du, Bin ^{[1
,2
]}

Wang, Jun ^{[1
,2
]}

Lund, Peter D. ^{[1
,3
]}

机构：

[1] Southeast Univ, Key Lab Solar Energy Sci & Technol Jiangsu Prov, Nanjing 210096, Peoples R China

[2] Southeast Univ, Energy Storage Res Ctr, Nanjing 210096, Peoples R China

[3] Aalto Univ, Sch Sci, POB 15100, FI-00076 Espoo, Finland

来源：

SOLAR ENERGY | 2020年 / 201卷

基金：

中国国家自然科学基金;

关键词：

Large-scale solar water system; Medium and low temperature; Straight-through all-glass evacuated tube; Photo-thermal efficiency; WATER-HEATING SYSTEM; NATURAL CIRCULATION FLOW; THERMAL PERFORMANCE; IN-GLASS; ENERGY;

D O I：

10.1016/j.solener.2020.03.069

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

A straight-through all-glass evacuated tube collector (ETC) made of high-quality borosilicate glass was developed for large-scale low and medium temperature solar hot water systems. It consists of an inner and outer tube without a free end and was shown to be mechanically stable with a thermal expansion coefficient of (3.3 +/- 0.1) x 10(-6) K-1. Due to turbulent conditions in the straight-through all-glass tube, a higher heat transfer rate could be achieved than in a Dewar-tube ETC, leading to increased heat extraction and decreased heat losses. The photo-thermal efficiency was improved, indicating that a straight-through tube could be more cost-effective. At the same time, active flow in the tube can result in a better water quality as the accumulation time in the tube was short.

引用

页码：935 / 943

页数：9

共 37 条

[1] Forced-circulation solar water heating system using heat pipe-flat plate collectors: Energy and exergy analysis
Allouhi, A.
Benzakour Amine, M.
Buker, M. S.
Kousksou, T.
Jamil, A.
[J]. ENERGY, 2019, 180 : 429 - 443
[2] [Anonymous], 2013, CONTRACT
[3] [Anonymous], 2006, HEAT TRANSFER MASS T
[4] Thermal performance analysis of a solar water heating system with heat pipe evacuated tube collector using data from a field trial
Ayompe, L. M.
Duffy, A.
[J]. SOLAR ENERGY, 2013, 90 : 17 - 28
[5] Influence of the absorber tubes configuration on the performance of low cost solar water heating systems
Barbosa, Eloiny Guimaraes
Viana de Araujo, Marcos Eduardo
de Moraes, Maria Joselma
Martins, Marcio Aredes
Xavier Alves, Beethoven Gabriel
Barbosa, Elisa Guimaraes
[J]. JOURNAL OF CLEANER PRODUCTION, 2019, 222 : 22 - 28
[6] Natural circulation flow through water-in-glass evacuated tube solar collectors
Budihardjo, Indra
Morrison, Graham L.
Behnia, Masud
[J]. SOLAR ENERGY, 2007, 81 (12) : 1460 - 1472
[7] Study of a solar water heater using stationary V-trough collector
Chong, K. K.
Chay, K. G.
Chin, K. H.
[J]. RENEWABLE ENERGY, 2012, 39 (01) : 207 - 215
[8] Experimental analysis of heat transfer in spiral coils using nanofluids and coil geometry change in a solar system
Daghigh, Roonak
Zandi, Pooya
[J]. APPLIED THERMAL ENGINEERING, 2018, 145 : 295 - 304
[9] Theoretical and experimental analysis of thermal performance of a solar water heating system with evacuated tube heat pipe collector
Daghigh, Roonak
Shafieian, Abdellah
[J]. APPLIED THERMAL ENGINEERING, 2016, 103 : 1219 - 1227
[10] Experimental investigation of a two-phase closed thermosyphon solar water heater
Esen, M
Esen, H
[J]. SOLAR ENERGY, 2005, 79 (05) : 459 - 468

← 1 2 3 4 →