Question

Exercise 1.16 An insulated district heating pipe with a total diameter d = 0.4 m is laid in the ground at a depth of h = 1.2 m. For a long cold period with an average ground surface temperature of 0°C and a temperature at the outer edge of the pipe insulation of 20°C, the heat loss per 1km of steam pipe must be calculated. The thermal conductivity of the soil should be assumed to be 0.6 W/mk

Answer 1

d1 a er heatloss A(一ㄧ-change n ㄧ一lemp 1000x ab Mito.tx ㄧ一ㄧ C20-o) 2 olt R W