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An ice skating rink is located in a building where the air is at T air = 20C and the

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An ice skating rink is located in a building where the air is at Tair = 20°C and the walls are at Tw = 25°C. The convection heat transfer coefficient between the ice and the surrounding air is h = 10 W/m2 · K. The emissivity of ice is ε = 0.95. The latent heat of fusion of ice is hif = 333.7 kJ/kg and its density is 920 kg/m3.

(a) Calculate the refrigeration load of the system necessary to maintain the ice at Ts = 0°C for an ice rink of 12 m by 40 m.

(b) How long would it take to melt d = 3 mm of ice from the surface of the rink if no cooling is supplied and the surface is considered insulated on the back side?

Transcribed Image Text:

Refrigerator load Tw = 25°C Tair = 20°C h = 10 W/m².K grad ¿conv Insulation mfu T, = 0°C - Control volume Ice

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a To calculate the refrigeration load necessary to maintain the ice at Ts 0C for an ice rink of 12 m by 40 m we need to consider the heat transfer through convection from the ice surface to the surrou…View the full answer


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Related Book For  answer-question
Heat And Mass Transfer Fundamentals And Applications

Heat And Mass Transfer Fundamentals And Applications

ISBN: 9780073398181

5th Edition

Authors: Yunus Cengel, Afshin Ghajar

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Question Details
Chapter # 1- INTRODUCTION AND BASIC CONCEPTS
Section: Problems
Problem: 145
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Question Posted: September 10, 2023 02:48:58
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