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You are asked to analyze a cubic enclosure of side length 750mm that will be used in high-temperature environments (like a desert) to protect sensitive electronics. The walls of the enclosure are multi-layer consisting of three layers: (see figure below) A structural inner layer made of 2024-T6 aluminum with a thickness of 1.5mm .A 2.5mm thick layer of thermal insulation (Kinsulation: 0.05 W/m/K) . A 0.2mm thick layer of Tungsten for resistance against abrasion A thermo-electric cooler with a capacity of 2kW is to be used to keep the inside of the enclosure at a temperature of 0 °C with an assumed ambient temperature of 50 °C. The convective heat transfer. coefficients for the inside and outside are shown in the figure. Please determine the following: 1. The thermal resistance diagram for the multi-layer wall, including the expressions for all temperatures and thermal resistances 2. The heat rate from a single side 3. The temperature of the outside surface of the cube 4. If it is assumed that the heat transfer is equal on all six sides, will the proposed 2kW thermo-electric cooler be sufficient? Tj 2004-16 alum resulation Tungsten Cross-Section of Wall To 750mm T.,:0°C h: 50 W/m²/K 750mm 750mm T: 50 °C h: 75 W/m²/K

You are asked to analyze a cubic enclosure of side length 750mm that will be used in high-temperature environments (like a desert) to protect sensitive electronics. The walls of the enclosure are multi-layer consisting of three layers: (see figure below) A structural inner layer made of 2024-T6 aluminum with a thickness of 1.5mm .A 2.5mm thick layer of thermal insulation (Kinsulation: 0.05 W/m/K) . A 0.2mm thick layer of Tungsten for resistance against abrasion A thermo-electric cooler with a capacity of 2kW is to be used to keep the inside of the enclosure at a temperature of 0 °C with an assumed ambient temperature of 50 °C. The convective heat transfer. coefficients for the inside and outside are shown in the figure. Please determine the following: 1. The thermal resistance diagram for the multi-layer wall, including the expressions for all temperatures and thermal resistances 2. The heat rate from a single side 3. The temperature of the outside surface of the cube 4. If it is assumed that the heat transfer is equal on all six sides, will the proposed 2kW thermo-electric cooler be sufficient? Tj 2004-16 alum resulation Tungsten Cross-Section of Wall To 750mm T.,:0°C h: 50 W/m²/K 750mm 750mm T: 50 °C h: 75 W/m²/K

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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zal You are asked to analyze a cubic enclosure of side length 750mm that will be used in high-temperature environments (like a desert) to protect sensitive electronics. The walls of the enclosure are multi-layer consisting of three layers: (see figure below) A structural inner layer made of 2024-T6 aluminum with a thickness of 1.5mm .A 2.5mm thick layer of thermal insulation (Kinsulation: 0.05 W/m/K) . A 0.2mm thick layer of Tungsten for resistance against abrasion A thermo-electric cooler with a capacity of 2kW is to be used to keep the inside of the enclosure at a temperature of 0 °C with an assumed ambient temperature of 50 °C. The convective heat transfer coefficients for the inside and outside are shown in the figure. Please determine the following: 1. The thermal resistance diagram for the multi-layer wall, including the expressions for all temperatures and thermal resistances 2. The heat rate from a single side 3. The temperature of the outside surface of the cube 4. If it is assumed that the heat transfer is equal on all six sides, will the proposed 2kW thermo-electric cooler be sufficient? T 2014-T6 aluminum ulation Tungsten Cross-Section of Wall To 750mm T.:0°C h: 50 W/m²/K 750mm 750mm To: 50 °C h: 75 W/m²/K
Transcribed Image Text:zal You are asked to analyze a cubic enclosure of side length 750mm that will be used in high-temperature environments (like a desert) to protect sensitive electronics. The walls of the enclosure are multi-layer consisting of three layers: (see figure below) A structural inner layer made of 2024-T6 aluminum with a thickness of 1.5mm .A 2.5mm thick layer of thermal insulation (Kinsulation: 0.05 W/m/K) . A 0.2mm thick layer of Tungsten for resistance against abrasion A thermo-electric cooler with a capacity of 2kW is to be used to keep the inside of the enclosure at a temperature of 0 °C with an assumed ambient temperature of 50 °C. The convective heat transfer coefficients for the inside and outside are shown in the figure. Please determine the following: 1. The thermal resistance diagram for the multi-layer wall, including the expressions for all temperatures and thermal resistances 2. The heat rate from a single side 3. The temperature of the outside surface of the cube 4. If it is assumed that the heat transfer is equal on all six sides, will the proposed 2kW thermo-electric cooler be sufficient? T 2014-T6 aluminum ulation Tungsten Cross-Section of Wall To 750mm T.:0°C h: 50 W/m²/K 750mm 750mm To: 50 °C h: 75 W/m²/K
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