A
cube at high temperature is immersed in a constant temperature bath. It
loses heat from its top, bottom and side surfaces with heat transfer
coefficients of h1, h2 and h3 respectively. The average heat transfer coefficient for the cube is
When tc1 and tc2 are the temperatures of cold fluid at entry and exit respectively and th1 and th2 are the temperatures of hot fluid at entry and exit point, and cold fluid has lower heat capacity rate as compared to hot fluid, then effectiveness of the heat exchanger is given by
The rate of heat flow through a body is`Q = (KA (T_1 - T_2))/(times)` . The term`(T_1 - T_2)/(times)`
is known as temperature gradient
The rate of heat flow through a body is `Q = (KA (T_1 - T_2))/(times)`. The term x/kA is known as