A domestic refrigerator with inner dimensions of 0.7 m by 0.7 m at the base and height1m was designed to maintain a set temperature of 6 "C. The bodies consist of two 10-mm-thick layers of Aluminium (k = 225 W/mK) separated by a 30 mm polyurethaneinsulation (k=0.028 W/mK). If the average convection heat transfer coefficient at theinner and outer surfaces are 11.6 W/m'K and 14.5 W/m'K respectively, calculate:Data: Hgt =W=L. = L, =m, k= k =L=, Tus=h.=,h =Area=5.1 the individual resistance(R) for each thermal layer, as well as for the total of therefrigerator,Assessor's Signature Moderator's SignaturePage 10 of 345.2 the steady rate of heat transfer from the interior to maintain the specified temperaturein the kitchen at 25 "C, and5.3 the outer surface temperature of the Aluminum.5.4 Sketch the sectional view of the refrigerator showing the thermal circuit.9/34 The following data was given for a steam power plant operating on the ideal reheatRankine cycle.3-4: Inlet steam at 17.5 MPa and 600 'C6-1: inlet steam at a pressure of 11.16 kPa at a wetness fraction of 0.1.At state 1, the specific volume is 0.00101 m'/kgIn a steam plant operating on a Rankine cycle, steam is supplied, dry saturated at 40bar and 600 °C to a turbine and the condenser pressure is 0.08 bar. Calculate, perkilogram of steam (feed-pump work should be considered in 4.2, 4.4,4.5 and 4.6),High-PturbineLow-PturbineReheater 4BoilerP= Ps = PreheatPumpCondenserAssessor's Signature Moderator's SignaturePage 7 of 34Data: P=, and P=Show the working of the values provided in box below such interpolation steps andpump work.

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A domestic refrigerator with inner dimensions of 0.7 m by 0.7 m at the base and height 1m was designed to maintain a set temperature of 6°C. The bodies consist of two 10- mm-thick layers of Aluminium (k = 225 W/mK) separated by a 30 mm polyurethane insulation (k=0.028 W/mK). If the average convection heat transfer coefficient at the inner and outer surfaces are 11.6 W/m K and 14.5 W/mK respectively, calculate: Data: Hgt = L- L,= m, k= k= L = Area= 5.1 the individual resistance(R) for each thermal layer, as well as for the total of the refrigerator, Assessor's Signature Moderator's Signature Page 10 of 34 5.2 the steady rate of heat transfer from the interior to maintain the specified temperature in the kitchen at 25 "C, and 5.3 the outer surface temperature of the Aluminum.

A domestic refrigerator with inner dimensions of 0.7 m by 0.7 m at the base and height 1m was designed to maintain a set temperature of 6°C. The bodies consist of two 10- mm-thick layers of Aluminium (k = 225 W/mK) separated by a 30 mm polyurethane insulation (k=0.028 W/mK). If the average convection heat transfer coefficient at the inner and outer surfaces are 11.6 W/m K and 14.5 W/mK respectively, calculate: Data: Hgt = L- L,= m, k= k= L = Area= 5.1 the individual resistance(R) for each thermal layer, as well as for the total of the refrigerator, Assessor's Signature Moderator's Signature Page 10 of 34 5.2 the steady rate of heat transfer from the interior to maintain the specified temperature in the kitchen at 25 "C, and 5.3 the outer surface temperature of the Aluminum.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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