Consider a 0.8-m-high and 1.5-m-wide double-pane window consisting of two 4-mm-thick layers of glass (k  0.78 W/m · °C) separated by a 10-mm-wide stagnant air space (k  0.026 W/m · °C). Determine the steady rate of heat transfer through this double-pane window and the temperature of its inner surface for a day during which the room is maintained at 20°C while the temperature of the outdoors is 10°C. Take the convection heat transfer coefficients on the inner and outer surfaces of the window to be h1  10 W/m2 · °C and h2 40 W/m2 · °C, which includes the effects of radiation.

Q: The outer wall consists of a 30 cm thick brick wall which is covered by a layer of styrofoam. How…

A:

Q: What is the total heat loss through a triple glazing (U-value: 1.3) window with an area of 2 m2 on a…

A:

Q: Required Information Consider a person whose exposed surface area is 2.1 m, emissivity is 0.5, and…

A:

Q: On a cold winter day, you decide to keep the outside surface windshield temperature at +2°C to…

A:

Q: During a hot summer day, you want to cool a 200mL drink initially at room temperature (35◦C) using…

A: Write the given values along with the suitable variables. Note: As the density of the drink is not…

Q: A student living in a 4-m x 6-m x 6-m dormitory room turns his 150-W fan on before she leaves her…

A:

Q: What is the ton of refrigeration required to cool 15,000 lbm of fresh pork from a temperature of…

A:

Q: Q2 A 2 kW resistance heater wire with thermal conductivity of k = 20 W/m °C, a diameter of D = 5 mm,…

A:

Q: A spherical pellet (ρ =1000 kg/m3 , c = 1000 J/(kg⋅K)) with a radius ro = 1 cm is cooled from an…

A: Given Data ρ =1000 kg/m3 , c = 1000 J/(kg⋅K)   ro = 1 cm  h = 100 W/(m2 K) Ans(a) k = 0.1 W/(m⋅K)…

Q: Newton's Law of Cooling - Differential Equations The rate at which a body cools is proportional to…

A:

Q: Consider a large plane wall of thickness L = 0.4 m, thermal conductivity k = 2.3 W/m · °C, and…

A: Concept Of Heat Transfer Used

Q: An aluminum plate, with dimensions of 3 cm × 3 cm × 5 cm (length, width, and thickness,…

A: Given:Volume,V=3*3*5 =45 cm3q=150 J/sρ=2700 Kg/m3t=10 secmass 0f aluminium plate,m=2700*45*10-6…

Q: Q3: Consider a (15cm x 20cm) printed circuit board (PCB) that has electronic components on one side…

A: Given data: Calculate the average temperature of the surrounding.

Q: On a summer day, in Phoenix, Arizona, the inside room temperature is maintained at 20° C while the…

A: Given data as per question Inside temperature =200cOutside air temperature=43.30c

Q: TransPipe company is going to transport a flammable liquid. It is known that this liquid is being…

A: Giveninner diameter di=10mheta added Q=20kWspecific heat C=2.5kJ/kg Kdensity of the liquid…

Q: A copper plate, with dimensions of 3 cm x 3 cm x 5 cm (length, width, and thickness, respectively),…

A: Given     Volume, V = 3 cm x 3 cm x 5 cm = 45 x 10-6 m3         Density = 8900 kg/m3         Time, t…

Q: 1. Consider a cylinder with a length of 15 cm and a diameter of 10 cm. The cylinder has a surface…

A: To find:Compare the heat transfer rate when the cylinder is placed horizontally and…

Q: A 5-cm-external-diameter, 10-m-long hot water pipe at 80°C is losing heat to the surrounding air at…

A:

Q: The space in a small building with average construction quality is to be provided with ventilation…

A: Write the expression of number of air changes per hour.

Q: The roof of a building is well insulated on its lower surface and the upper surface is made of black…

A:

Q: Hot air at 79.0 oC is blown over a 3-m by 5-m flat surface at 34.9 oC. If the average convection…

A:

Q: Air enters a 7-cm-diameter and 5-m-long tube at 65°C and leaves at 15°C. The tube is observed to be…

A: The diameter of the pipe is d=7 cm=0.07 m . The length of the pipe is L=5 m. The convective heat…

Q: A hollow tube (inner radius = 40 mm) is heated by a constant surface heat flux of 34 W/m2. A fluid…

A:

Q: convection between the hood and the surroundings at. To=27°C,h -T₁, e=0.93 Determine the net rate of…

A: Calculating the net rate of heat transfer between the grill hood and the surrounding by convection…

Q: What is a quasi-equilibrium process? What is its importance in engineering?

A: Quasi-equilibrium process The quasi-equilibrium process is considered as the almost slow or…

Q: How does the science of heat transfer differ from the science of thermodynamics? Give your answers…

A: Thermodynamics and Heat Transfer both are part of thermal engineering and each has its own meaning…

Q: A 20 cm-diameter-copper cylinder is to be heated from 50 °C to an average temperature of 150 °C with…

A:

Q: A window is replaced by a wall with thick insulation. The thermal conductivity of the same area will…

A: As per policy, one question can be answered. Hence, first question is answered.   Given, Thermal…

Q: Brass plate of 6 cm thickness that are initially at 25 °C are heated by passing it through an oven…

A:

Q: There is a cylindical piece of nickel, that is 5 cm in diameter and 10 cm in length, that is…

A:

Q: A 12-by-12 in. open pan containing water at 140 °F is placed in the exact center of a 16-by-20 ft…

A: Given - A=12×12 in2=0.093m2 , T1=140°F=333.15K, T2=75°F=297.04K The shape factor will be 0.5 as pan…

Q: determine the rate of flow through the boiler

A: Given data; L1=20×10-3 mk1=58 W/m0cL2=5×10-3mk2=0.116 W/m0cT1=3000CT2=500C Therefore find rate of…

Q: Air with a temperature of 128 °C, a density of 4.89 kg/m3 and a velocity of 121 m/s enters a nozzle…

A: The mass flowrate of fluid passing through a cross section can be determined as the product of…

Q: A cool box made of a material, having Thermal Conductivity of 0.22 W/m.°C has a total area of 3.9 m²…

A: Given Data Thermal conductivity of material is :k=0.22 W/m°C Total area is :A=3.9 m2 Initial…

Q: Calculate the pressure and density of air at a height of 4000 m from sea-level where pressure and…

A: Given Dataz=4000mPo=10.143 N/cm2=10143 N/m2dTdz=-0.0065°C/mρ=1.285 kg/m3

Q: Ball bearing ro=4 mm leaving the oven at a uniform temperature of 900 oC are exposed to air for a…

A: The thermal conductivity, density, and specific heat of the bearings are given to be k =…

Q: The average thermal conductivity of the walls (including windows) and roof of a house in the figure…

A: The inside temperature is .The outside temperature is .The average thermal conductivity is .The…

Q: The roof of an electrically heated home is 6 m long, 8 m wide, and 0.25 m thick, and is made of a…

A:

Q: A wood stove is used to heat a single room. The stove is cylindrical in shape, with a diameter of 26…

A:

Basic Thermodynamic Processes

The word 'thermodynamics' can be divided into two words, 'thermo' and 'dynamics'. The word thermo deals with the heat and thermal phenomenon, whereas dynamics deals with forces or external agent that drives the heat flow or aids in the motion of heat.