Abstract
The goal of this experimental investigation was to evaluate the compatibility of water and mild steel as the working fluid and vessel material in a heat pipe application. Heat pipes of 1015 CD steel and 304 stainless steel were fabricated and operated at temperatures ranging from 150°C to 300°C for a period of six months. Results showed that mild steel heat pipes had a lower overall thermal resistance than the stainless steel pipes, and that performance recovery occurs at a greater rate in the mild steel pipes when noncondensible gas is generated. It is concluded that water and mild steel are a satisfactory materials combination in heat pipes in the temperature range investigated.
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