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Why do you feel the heat while standing in front of a fireplace when most of the heat is really rising up and out of the chimney?
Wiki User
∙ 14y ago
Because heat is warm
Dr N John
Wiki User
∙ 14y ago
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Rising mains come up from underground so they are less likely to be affected by weather conditions and they are not an eyesore.
How can a levee prevent flooding?
It keeps rising water inside stream channels.
What is the cycle of heating rising and cooling and sinking called?
The process of Convection / subduction current
Is there an Open and close indicator for a gate valve?
Yes buy a RISING Stem type
What is life orientation?
Rising in Consciousness is the main interest of life. Like a universal consciousness.
Why does smoke rise up a chimney?
Hot air rises, just as cold air lays low (sinks) to the ground. When a fire ensues, smoke (the product of carbon combustion) rises with the hot air. Chimney design is what keeps smoke from just going anywhere around a fireplace. A chimney uses the principles of rising hot air and acts as funnel. A chimney's flue (the device which controls the amount of air drawn up the chimney) affects the funnel effect dramatically. As hot air rises up the chimney, the fire consumes more oxygen in the room where the fireplace is, creating a vacuum effect, which in turn feeds the flame with even more oxygen faster. It is the combination hot air rising and subsequent vacuum effect in the room below which ensures that smoke from a fireplace fire will go up a chimney. ithout the control of the chimney flue, this effect could quickly lead to a fireplace fire getting too hot for the fireplace to handle. This effect can also be extremely dangerous in a house fire or a building fire in which there are drop ceilings. Some natural building areas, such as stairwells, act as natural chimneys. In office buildings with drop ceilings, it is against fire codes to have any drop ceiling tiles removed, as this can cause a chimney effect if a fire were to break out. Remember since a chimney effect leads to oxygen been fed to a fire at faster rates, the fire can quickly accelerate and consume an area.
What goes up a chimney down but won't go down the chimney up?
Smoke can go either up or down a chimney. In order for smoke to go up a chimney, or draw correctly, there must be replacement air coming into the fireplace from the room, and therefore replacement air must be coming into the room. If there isn't any replacement air, the air pressure in the room will drop, and if the air pressure gets below that of the outside air at the top of the chimney, the smoke will be drawn to the lower pressure area of the room, down the chimney.
What is the rising action in the book Clues of the Leaning Chimney?
the plot is that Nancy, Bess, and George are looking for Leaning Chimney.
Whose election was signaled by white smoking rising from a chimney in Itaty?
The Pope
Name something you see smoke rising out of?
Chimney Campfire Cigarette Factory Tailpipe
Why do the cornish tin mine chimney stacks have brick at the top half and not stone like the rest of the construction?
The top of the chimney was made from brick because this would heat up faster than stone, and if the top of the chimney is hotter than the rest of the chimney then the draught of air rising up the chimney would increase, therefore making the chimney more efficient.
What do you call the move between sitting down and standing up?
rising
What are some examples for laminar flow?
smoke rising in a thin column from a chimney on a very still day.slow flow of water from a tap.
What is the main process that transfers heat upwards through the chimney?
The same process is used to lift a hot air balloon off the ground. Everything on the earth is under atmospheric pressure. Think of that as the weight of everything above you weighing down. Even air has some weight. When air (a gas) gets warmer, such as in the fireplace or in the burner of the balloon, then the molecules are excited and they move farther apart from each other. This causes the air to weigh less (become less dense). When the air weighs less, then it rises. The chimney is built right next to the fire to give a place for the air to rise. The smoke particles are carried away and up the chimney along with the rising air.
What is the main process that transfers heat upward through a chimney?
The same process is used to lift a hot air balloon off the ground. Everything on the earth is under atmospheric pressure. Think of that as the weight of everything above you weighing down. Even air has some weight. When air (a gas) gets warmer, such as in the fireplace or in the burner of the balloon, then the molecules are excited and they move farther apart from each other. This causes the air to weigh less (become less dense). When the air weighs less, then it rises. The chimney is built right next to the fire to give a place for the air to rise. The smoke particles are carried away and up the chimney along with the rising air.
Does hot air rise?
Yes. Hot air is less dense, and therefore lighter than cold air, so it will rise as cold air will drop. A perfect example of this, is smoking rising to the ceiling in a fire, or smoke rising out of your chimney.
Can lighting a fire in the fireplace with a chimney make the rest of the house colder?
It can, though this may be counter-intuitive. The heated air rising out of the chimney must be replaced by air from outside. Usually this air enters the house through open or leaky windows and doors, through openings in the walls, or through under-eave vents into the attic. Depending upon the placement of the air sources and the temperature of the outside air, this may have significant cooling effect on the living space of the house. To counteract this effect, most well designed residential furnace systems are provided with a "makeup air" duct from outside directly into the furnace room. This way, the cold air from outside needed to replace the air leaving through the chimney can enter directly into the furnace burner or draft diverter. Some modern fireplace designs take a similar approach with a small makeup air duct or vent located near the fireplace.
