ABSTRACT
In order to develop relationships between the heat-transfer rate q, surface area A, fluid terminal temperatures, and flow rates in a heat exchanger, the basic equations used for analysis are the energy conservation and heat-transfer rate equations [1]. The energy conservation equation for an exchanger having an arbitrary flow arrangement is
where Atm is the true mean temperature difference, which depends upon the exchanger flow arrangement and the degree of fluid mixing within each fluid stream; Cc is capacity rate of the cold fluid, (Mcp)c; Ch is capacity rate of the hot fluid, (Mcp)h; tc-{ and fC;0 are cold fluid terminal temperatures (inlet and outlet); and tWl and fh>0 are hot fluid terminal temperatures (inlet and outlet).
