2.7-8 Figure P2.7-8(a) illustrates a heat exchanger in which hot fluid and cold fluid flows through alternating rows of square channels that are installed in a piece of material. HHHHHHCCCCCCH = channels carrying hot fluidC = channels carrying hot fluidunit cell ofheat exchangerFigure P2.7-8(a): Heat exchanger. You are analyzing this heat exchanger and will develop a model of the unit cell shown in Figure P2.7-8(a) and illustrated in more detail in Figure 2.7-8(b). 2150 W/m -K80 ChhT==°2150 W/m -K25 CchT=th/2 =0.4 mmL=6mmp/2 = 4 mmthb=0.8mmk= 12 W/m-KFigure 2.7-8(b): Details of unit cell shown in Figure 2.7-8(a). The metal struts separating the square channels form fins. The length of the fin (the half-width of the channel) is L= 6 mm and the fin thickness is th= 0.8 mm. The thickness of
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