闭合回路单相自然循环稳态特性研究

Investigation on Steady State Performance of Single Phase Natural Circulation for Enclosed Loop

针对闭合回路单相自然循环的特点，对回路流动的基本方程进行简化，得出稳态自然循环流量Ｇｓｔ与加热功率Ｑ的１／（ｍ＋１）次方成正比，热源流体进出口温差ΔＴｓｔ与加热功率Ｑ之间的ｍ／（ｍ＋１）次方成正比。某闭合回路单相自然循环实验装置得到的实验结果表明，当Ｑ２２０ｋＷ、ｍ＝１及Ｑ＞２２０ｋＷ，ｍ＝２时，实验值与理论解符合得很好。

The fundamental equations of flow are simplified according to the character of single phase natural circulation for enclosed loop.As a result,the solutions are that steady state flow rate Gst is directly proportional to Q1/(m+1)(Q,heating power) and temperature difference ΔTst between inlet and outlet of heat source proportional to Qm/(m+1).Data from a certain facility show that experimental results match well with theoretical values either when Q is not more than 220kW and m equal to 1 or when Q more than 220kW and m equal to 2.