Answer to Question #327168 in Mechanical Engineering for Brylle

Question

An ice-skating rink is located in an indoor shopping mall with an environmental air temperature of 22◦C and radiation surrounding walls of about 25◦C. The convection heat-transfer coefficient between the ice and air is about 10 W/m2 · ◦C because of air movement and the skaters’ motion. The emissivity of the ice is about 0.95. Calculate the cooling required to maintain the ice at 0◦C for an ice rink having dimensions of 12 by 40 m. Furthermore, the rink is located on the 2nd floor with which the room air temperature of the 1st floor is 24◦C with convection heat-transfer coefficient between the concrete floor (see appendix Table A3 for normal weight concrete) of the 2nd floor is about 12 W/m2. ◦C. Thickness of the concrete is 4 inches. The Obtain a value for the heat of fusion of ice and estimate how long it would take to melt 3 mm of ice from the surface of the rink if no cooling is supplied.

Answer 1

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