A crucible of molten metal at 1800°C is placed on the foundry floor. The foundry man covers it with a metal sheet to reduce heat loss to the room. If the transfer factor, F, between the melt and the sheet is 0.4, and that between the top of the sheet and the room is 0.8, how much will the heat loss to the room be reduced by the sheet if the transfer factor between the uncovered melt and the room had been 0.8?

A crucible of molten metal at 1800°C is placed on the foundry floor. The foundry man covers it with a metal sheet to reduce heat loss to the room. If the transfer factor, F, between the melt and the sheet is 0.4, and that between the top of the sheet and the room is 0.8, how much will the heat loss to the room be reduced by the sheet if the transfer factor between the uncovered melt and the room had been 0.8?

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

See similar textbooks

Similar questions

3- Compare the value between the the actual heat transfer rate Qactual for the surface with fins and the surface without fin ? 4- Using any program to draw the relationship between the actual heat transfer rate Qactual with the base temperature Tb ? ( For the surface with fins and the surface without fin).
6-41 The coefficient of performance of a residential heat pump is 1.6. Calculate the heating effect in kJ/s this heat pump will produce when it consumes 2 kW of electrical power.
1
A 1.5m diameter spherical balloon containing air at (162 + 10) kPa is cooled such that the volume is reduced by 25%. For the process, the pressure is proportional to the square of the sphere’s diameter. What is the work done by the surrounding?
Determine the quantity (volume) of saline water in a steam generator. The heat energy of 1592 kJ is supplied to saline water in the steam generator to heat from 26ºC to 119ºC for the generation of water vapor, Take the density & specific heat of the solution as 1030 kg/m3 & 3.2 J/kgºK respectively. Solution: Change in Temperature (in K) Answer for part 1 Mass of the saltwater (in kg)Answer for part 2 Quantity (Volume) of saltwater (in m3) Answer for part 3
What is the heat transfer rate of initial temperature of 26 degree Celsius and the final temperature is 85 degree Celsius.
You want to heat a house on a very cold day as shown in the figure. To do this, you want to use photovoltaic panels as an energy source. It would be about using 15 panels each with an area of 1.5 m2. These panels would be connected to an electrical resistance that would heat the house as shown in the figure. The house is losing heat through the walls and ceiling as shown in the figure. The panels are receiving solar radiation at a rate of 800 W / m2 and if their efficiency is 15%. How much will the temperature of the house rise after an hour? The house is hermetically sealed. Assume that the specific heats of air, cv and cp, are constant as shown in the figure. sol = sun fuga = leakage aire = air
Describe the photo of the tea kettle at the beginning of this section in terms of heat transfer, work done, and internal energy. How is heat being transferred? What is the work done and what is doing it? How does the kettle maintain its internal energy?
2:59 A Done lecture 6 highlighted_125e07bec138250... 4. Size ductwork 5. Size fan 6. Size grilles and diffusers. Example: The diagram that displayed in figure is the conditioned building at 24°C db and 50% RH. The building has a glass door with length 24 m and height 4.25 m and 3 wood doors. The dimensions for each door 2mx2.5m. The overall heat transfer coefficient of the building constituents as follows: 0.7 W/m².K Walls Roof Glass door Wood doors - No. of persons in the building = 100. - Sensible heat for each person q. = 72 W. Lec. (6) 0.5 W/m². K 3.2 W/m².K -Latent heat for each person q₁ - 45 W - Ventilation rate in building for each person = 5 L/sec. Light power 10 W/m². ल 1.6 W/m².K Z Outside conditions are: 10°C db, 6°C wb. Calculate the sensible, latent and total heat. Calculate the sensible heat factor. Refrigeration and A/C 18 LTE 54 + 3 Dr. Omar M. Ali