Numerical investigation on thermal performance and flow characteristics of Z and S shape printed circuit heat exchanger using S-CO2

Thermal Science

Lin Yuan-Sheng¹  Xie Yong-Hui²  Jing Qi² 

[1] Xi’an Jiaotong University, School of Energy and Power Engineering, Xi’an, China + Wuhan Second Ship Design and Research Institute, Key Lab. ofThermal Power Technology, Wuhan, China;Xi’an Jiaotong University, School of Energy and Power Engineering, Xi’an, China;

关键词: printed circuit heat exchanger;    supercritical co2;    thermal hydraulic performance;    s shape channel;    z shape channel;   

DOI  :  10.2298/TSCI180620090L

来源: DOAJ

【 摘 要 】

As a high-efficiency compact heat exchanger, the printed circuit heat exchanger has been widely applied into nuclear reactor and energy industry. In the present paper, the thermal hydraulic performance of printed circuit heat exchanger based on S-CO2 Brayton power cycle has been numerically investigated for various channel shape and bend angle. A total of seven different shaped channels including straight, Z-10, Z-20, Z-30, S-10, S-20, S-30 are modeled, and evaluated according to the heat transfer and friction performances within the Reynolds number of 5000-30000. The inlet temperature/outlet pressure of hot channel and cold channel are 553 K/2.6 MPa and 381 K/8.5 MPa, respectively. The flow patterns, average Nusselt number, friction factor, and heat exchanger effectiveness are obtained. On the comprehensive consideration of heat transfer enhancement and friction, the S-20 channel produces the best thermal performance. This investigation has provided important reference data for the design of advanced printed circuit heat exchanger in the energy industry.

【 授权许可】

Unknown