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A heat exchanger (HE) is used to heat a 60-m³ room (2.58 kmol). Saturated steam at 3.0 bar condenses in the HE and emerges as a liquid at the saturation temperature. Heat is lost from the room to the outside at a rate Q(kJ/h) 30.0(T - To) where T(°C) is the room temperature and To= 0 °C is the outside temperature. At the moment the HE is turned on, the temperature in the room is 10 °C. Let ms (kg/h) denote the rate at which steam condenses in the HE and n (kmol) the quantity of air in the room. Write a differential energy balance on the room air, assuming that remains constant at its initial value, and evaluate all numerical coefficients. Take the heat capacity of air (C₂) to be constant at 20.8 J/(mol °C). AĤ, = 2163 kJ/kg ر سید =

A heat exchanger (HE) is used to heat a 60-m³ room (2.58 kmol). Saturated steam at 3.0 bar condenses in the HE and emerges as a liquid at the saturation temperature. Heat is lost from the room to the outside at a rate Q(kJ/h) 30.0(T - To) where T(°C) is the room temperature and To= 0 °C is the outside temperature. At the moment the HE is turned on, the temperature in the room is 10 °C. Let ms (kg/h) denote the rate at which steam condenses in the HE and n (kmol) the quantity of air in the room. Write a differential energy balance on the room air, assuming that remains constant at its initial value, and evaluate all numerical coefficients. Take the heat capacity of air (C₂) to be constant at 20.8 J/(mol °C). AĤ, = 2163 kJ/kg ر سید =

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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Q: A heat exchanger (HE) is used to heat a 60-m³ room (2.58 kmol). Saturated steam at 3.0 bar condenses in the HE and emerges as a liquid at the saturation temperature. Heat is lost from the room to the outside at a rate Q(kJ/h) = 30.0(T – To) where T(°C) is the room temperature and To = 0 °C is the outside temperature. At the moment the HE is turned on, the temperature in the room is 10 °C. Let ms (kg/h) denote the rate at which steam condenses in the HE and n (kmol) the quantity of air in the room. Write a differential energy balance on the room air, assuming that remains constant at its initial value, and evaluate all numerical coefficients. Take the heat capacity of air (C₂) to be constant at 20.8 J/(mol °C). AH, = 2163 kJ/kg Knol
Transcribed Image Text:Q: A heat exchanger (HE) is used to heat a 60-m³ room (2.58 kmol). Saturated steam at 3.0 bar condenses in the HE and emerges as a liquid at the saturation temperature. Heat is lost from the room to the outside at a rate Q(kJ/h) = 30.0(T – To) where T(°C) is the room temperature and To = 0 °C is the outside temperature. At the moment the HE is turned on, the temperature in the room is 10 °C. Let ms (kg/h) denote the rate at which steam condenses in the HE and n (kmol) the quantity of air in the room. Write a differential energy balance on the room air, assuming that remains constant at its initial value, and evaluate all numerical coefficients. Take the heat capacity of air (C₂) to be constant at 20.8 J/(mol °C). AH, = 2163 kJ/kg Knol
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