The numerical study of the thermal performance of a condensing gas-water heater

被引：0
作者：
Cao, Weixue [1 ]
Liu, Fengguo [2 ]
You, Xue-Yi [1 ]
机构：
[1] Tianjin Univ, Sch Environm Sci & Engn, Tianjin Key Lab Indoor Air Environm Qual Control, Beiyang Yuan Campus, Tianjin 300350, Peoples R China
[2] Tianjin Chengjian Univ, Sch Energy & Safety Engn, Tianjin, Peoples R China
来源：
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS | 2018年 / 74卷 / 08期
关键词：
FLUE-GAS; EXCHANGERS; DESIGN; CFD; OPTIMIZATION; TEMPERATURE; SIMULATION; RECOVERY; SYSTEM; SIDE;
D O I：
10.1080/10407782.2018.1517552
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Cast silicon-aluminum alloys exhibit corrosion resistance and heat transfer characteristics, and can be used as new materials in a condensing gas-water heater. A 3D mathematical model is established, and verified by the experiment, and then the flow and heat transfer characteristics are studied. It is observed the temperature misdistribution of the flue gas resulted from the condensation of water vapor. The temperature drop occurring in the high temperature zone exceeds 80%. Nusselt (Nu) empirical formulas for flue gas and water are obtained for two conditions. When inlet water gauge pressure reaches 0.02 MPa, heat transfer efficiency is the highest.
引用
收藏
页码：1468 / 1485
页数：18
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