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ef152-lec-6-5

# ef152-lec-6-5 - A Hello Kitty cooler has a COP of 3 The...

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EF 152 Spring, 2009 Lecture 6-5 9 Lecture 6-5: Parang Cycle A V (m 3 ) p (KPa) A B Isothermal Adiabatic Working substance is air 0.2 0.5 300 100 C D T B = 293K Is this a: A. heat engine B. refrigerator EF 152 Spring, 2009 Lecture 6-5 10 Parang Cycle A D 0.5 C 293 100 B 0.2 300 A T (K) V (m 3 ) P (kPa) State Total D-A C-D B-C A-B Δ U (kJ) Δ Q (kJ) Work (kJ) Process EF 152 Spring, 2009 Lecture 6-5 13 Refrigerator A Hello Kitty cooler has a COP of 3. The cooler
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Unformatted text preview: A Hello Kitty cooler has a COP of 3. The cooler can convert 30 g of water at 22°C to 30 g of ice at -20°C each minute. What input power is required? EF 152 Spring, 2009 Lecture 6-5 14 Entropy Calculate the change in entropy when 0.8kg of coffee at 20°C is cooled to frozen coffee (iced coffee) at 0°C....
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