19. The inner and outer glasses of a 2-m x 2-m double pane window are at 18°C and 6°C, respectively. If the 1-cm space between the two glasses is filled with still air, determine the rate of heat transfer through the window, in kW.

19. The inner and outer glasses of a 2-m x 2-m double pane window are at 18°C and 6°C, respectively. If the 1-cm space between the two glasses is filled with still air, determine the rate of heat transfer through the window, in kW.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter2: Steady Heat Conduction

Section: Chapter Questions

Problem 2.34P: 2.34 Show that the temperature distribution in a sphere of radius . made of a homogeneous material...

See similar textbooks

Related questions

Q: An object whose mass is 250 kg is located at an elevation of 30 m above the surfaceof the earth. For…

Q: What is the thermodynamics parameter that refers to the total energy content of a system?

A: Given data What is the thermodynamics parameter that refers to the total energy content of a system.

Q: Explain the energy is recognized as heat transfer only as it crosses the system boundary?

A: Heat builds up due to temperature change, it can only be considered as energy once the sates can be…

Q: When 100 kJ of work is done on a closed system during a process, the total energy of the system…

Q: Determine the power output, in hp, of an animal pulling a plow at a speed of 3 kph. The draft is 75…

A: Mass = m = 75 Kg Velocity = V = 3 Kph = 0.8333 MPs 1 Kph = 0.2778 MPs 1 Watt = 0.001341 hp

Q: Can a system have a higher second-law efficiency than the first-law efficiency during a process?…

A: Yes, a system can have a higher second -law efficiency than the first-law efficiency during a…

Q: An adiabatic process is one during which no energy enters or leaves the system by heat

Q: 500 J/(Kg. C), is The quantity of heat required to raise the temperature of 500 g of iron by 2°C…

A: As given in question, Mass of iron = m = 500 g = 0.5 kg Change in temperature = ΔT = 2 oC Specific…

Q: A mass of 15 kg of air in a piston–cylinder device is heated from 25 to 95°C by passing current…

A: The flow of electricity is considered as the work done on the system. The enthalpy change of the gas…

Q: An electric generator coupled to a windmill produces an average electric power output of 25 kW. The…

A: Given data; power output = 25 kW Heat transfer from the battery to the surroundings occurs at a…

Q: 350 kJ of heat is added in a piston-cylinder arrangement containing air causing it to expand in a…

Q: 25. Determine the total energy required to accelerate a 1800-kg car from 10 to 60 km/h on an uphill…

Q: A substance of mass 3.4 kg is inside a piston-cylinder assembly with an initial volume of 0.31 m3,…

A: Given data: m=3.4 kgV1=0.31 m3P=2.4 barT1=52°CV2=0.82 m3 Need to determine the work transfer.

Q: Determine the specific kinetic energy of a mass whose velocity is 30 m/s, in kJ/kg.

A: Given: The velocity of the mass is V=30 m/s. The expression of the specific kinetic energy of the…

Q: A room is heated as a result of solar radiation coming in through the windows. Is this a heat or…

A: Considering the room as a system, the solar radiation coming through the windows will act as the…

Q: A man of weight 600 N is standing on the bottom of a building of height 10 m, the energy possessed…

A: Weight of man, W=600N Height of building, H=10m

Q: Define the Energy can cross the boundaries of a closed system in the form of heat and work?

A: Answer :- There are three types of Systems Open system Closed system Isolated system

Q: If a closed system undergoes a process during which it receives energy by heat transfer and work is…

A: First law of thermodynamics: According to this law,” the energy of an isolated system remains…

Q: Determine the Kinetic energy in BTU of a 7 lbm block moving at a velocity of 85 ft/s

A: given weight = 7 lb and velocity ,v=85ft/s

Q: 2. The power output of an adiabatic steam turbine is 5 MW, and the inlet and the exit conditions of…

A: a) The magnitude of ∆h, ∆ K.E and ∆PE can be determined as

Q: The thermal efficiency of a refrigerator is determined by the coefficient of performance COP, which…

Q: Calculate the total potential energy, in Btu, of an object that is 20 ft below a datum level at a…

A: Given: The mass is m=100 lbm. The gravitational acceleration is g=31.7 ft/s2. The height below the…

Q: How much work, in kJ, can a spring whose spring constant is 3 kN/cm produce after it has been…

A: Given: The compression of the spring is x=3 cm. The spring constant is k=3 kN/cm.

Q: During the expansion of a gas in piston-cylinder the relation between the pressure and the volume is…

A: Given data: Polytropic process with polytropic index (n) = 1.2 Initial pressure (P1) = 500 kPa…

Q: 1. An engine rejects 200kW when running at a thermal efficiency of 22%. The calorific value of the…

A: As per our guidelines we are supposed to solve 1st question if multiple questions are given, Kindly…

Q: The Refrigerating Effect of 94 tons of refrigeration is 127.75 kJ/kg. Determine

A: given:refrigeration effect =127.75kj/kgrffrigerator of 94 tons

Q: When an object of 4 kg changes it’s velocity from 10 to 30 m/s, what is its kinetic energy change…

A: mass m=4kg initial velocity V1=10m/s final Velocity V2=30m/s To Find the kinetic energy change in KJ

Q: In a system undergoing adiabatic expansion, what are the values of internal energy and heat if work…

A: Given data:

Q: 500J/(Kg.°C) is: The quantity of heat required to raise the temperature of 500 g of iron by 2 C…

A: Given, Mass of iron = m = 500 g = 0.5 kg Change in temperature = ΔT = 2 oC Specific heat capacity of…

Q: Unlike conduction and convection, heat transfer by radiation can occur between two bodies even when…

A: Radiation is the mode of heat transfer where the body radiates heat at all temperatures (except 0…

Q: How would you define a system to determine the temperature rise created in a lake when a portion of…

A: There are three types of system in Thermodynamics based on Mass and Energy interaction between…

Q: In what forms can energy cross the boundaries of a closed system?

A: Close system: It is a thermodynamics system in which mass cannot cross the boundary of the system…

Q: Sensible heat transfer from a warm body to a cold body is only possible when

A: Sensible heat: The heat that is required to increase unit temperature of unit mass of any object is…

Q: A 75-m-high water body that is open to the atmosphere is available. The mechanical energy of this…

A: Given: The height of the water body is H=75 m.

Q: What is the internal energy of 5 kg saturated water at 450 K that has a volume of 0.8 m³? А. 8.35 MJ…

Q: A spring whose spring constant is 200 lbf/in has an initial force of 100 lbf acting on it. Determine…

Q: → What is the difference between an open system and an isolated system?

A: It is required to differentiate between open system and isolated system

Q: A room measures 4mx7mx5m and the air in it has to be always kept 20 C0 lower than that of the…

Q: 42. A carnot engine produces 50, 943 hp of power while operating between temperature limits of…

Q: An object whose mass is 90 lb is projected straight upward from the surface of the earth and reaches…

A: Given:m=90 lbh=900 ftg=32.2 ft/s2

Q: Determine the mass of cooling water in kg/s for a water cooled air-conditioning system that uses R22…

Q: Consider a room with indoor temperature of 28°C and the outdoor temperature of 32°C. Due to the…

Q: 2.34 WP A fan forces air over a computer circuit board with surface area of 70 cm' to avoid…

Q: For a system having a mass of 1 lb whose velocity increases from 50 ft/s to 100 ft/s while its…

A: Given Mass = 1 lb Distance = 50 ft to 100 ft Elevation 40 ft Acceleration due to gravity = 32 ft/s…

Q: 29. Determine the total energy required to accelerate a 1800-kg car from 10 to 60 km/h on an uphill…

A: Given:- Mass of the car (m) = 1800 kg Initial velocity of the car (u) = 10 km/h Final velocity of…

Question

105°C, determine the temperature of the outer surface of the bottom of the pan.
19. The inner and outer glasses of a 2-m x 2-m double pane window are at 18°C and 6°C,
respectively. If the 1-cm space between the two glasses is filled with still air, determine the
rate of heat transfer through the window, in kW.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Similar questions

At a constant pressure, how does a volume of gas vary with respect to the absolute temperature?
On a summer day in Phoenix, Arizona, the inside room temperature is maintained at 68° F while the outdoor air temperature is a sizzling 110° F . What is the outdoor– indoor temperature difference in (a) degrees Fahrenheit, (b) degrees Rankine, (c) degrees Celsius, and (d) kelvin? Is one degree temperature difference in Celsius equal to one temperature difference in kelvin, and is one degree temperature difference in Fahrenheit equal to one degree temperature difference in Rankine? If so, why?
23.) A Carnot engine produces 61,768 hp of power while operating between temperature limits of 1,290°F and 85°F. Determine the efficiency of the engine in %.
3. A lumped system with a volume of 0.003 m³ and a surface area of 0.08 m² is made of a material with density of 3800 kg/m³, thermal conductivity of 300 W/m K, and specific heat of 200 J/kg K. If the system is exposed to a convection environment with h = 60 W/m2 K, what is the approximate time it will take for this system to reach equilibrium with the environment? Express your answer in minutes.
Unlike conduction and convection, heat transfer by radiation can occur between two bodies even when they are separated by a medium colder than both of them.
The specific heat of water is 4.2 kJ/kg°C. The heat needed to warm 8 kg of water from 20°C to 70°C is
A student living in a 4-m x 6-m x 6-m dormitory room turns on her 150-W fan before she leaves the room on a summer day, hoping that the room will be cooler when she comes back in the evening. Assuming all the doors and windows are tightly closed and disregarding any heat transfer through the walls and the windows, determine the temperature in the room when she comes back 10 h later. Use specific heat values at room temperature, and assume the room to be at 100 kPa and 15°C in the morning when she leaves.
A student living in a 4-m x 6-m x 6-m dormitory room turns on her 150-W fan before she leaves the room on a summer day, hoping that the room will be cooler when she comes back in the evening. Assuming all the doors and windows are tightly closed and disregarding any heat transfer through the walls and the windows, determine the temperature in the room when she comes back 10 h later. Use specific heat values at room temperature, and assume the room to be at 100 kPa and 15°C in the morning when she leaves. ANS. 58.2 C
In determining the average rate of heating of a tank of 20% sugar syrup, thetemperature at the beginning was 20°C and it took 30 min to heat to 80°C. Thevolume of the sugar syrup was 50 ft3 and its density 66.9 lb/ft3. The specific heat ofthe sugar syrup is 0.9 Btu lb-1°F-1.(a) Convert the specific heat to kJ kg-1°C-1.(b) Determine the rate of heating, that is the heat energy transferred in unit time, in SI units (kJ s-1)
The U.S. Department of Energy estimates that 570,000 barrels of oil would be saved per day if every household in the United States lowered the thermostat setting in winter by 6°F (3.3°C). Assuming the average heating season to be 180 days and the cost of oil to be $55/barrel, determine how much money would be saved per year.
If H is the work output of a heat engine and Q is the total heat input of an engine, then determine its thermal efficiency.
A Block has the potential to produce up to 3000 MWh of geothermal energy when the project is developed to completion. In the region, the average geothermal temperature gradient is 20 °C/km, the maximum depth that can be reached using conventional drilling technology is 10 km, the average annual surface temperature is 25 °C and the rock under the surface in that region has a density of 2600 kg/m3 and a specific heat of 1000 J/kg.K. Determine the minimum mass of rock required to meet this demand.