A2-3-5 Heat exchanged with cold metals

The cold metals are those metallic components which during operation are at about the ambient temperature of the containment. They are lined, on exposed surfaces, by a layer of paint. The model used here is a simple capacity (metal) and a resistance (paint and interface paint mixture). Thus Equations A2.19 and A2.20 follow  

The temperatures, T, of the layers in which the concrete has been subdivided at the end of the time interval are calculated by Equations A2.22-A2.24  

M is an auxiliary calculation non-dimensional quantity and is given by Equation A2.25  

---