Re: Assistants
I just learn a little VHDL (1st year Electronic Engineering Student). Nice cats.
James
John Hope said:
I just learn a little VHDL (1st year Electronic Engineering Student). Nice cats.
James
Question:
Start with a perfectly insulated room, temperature at 20C. Add a running refrigerator with the door open, what will happen to the temperature in the room and why?
Start with a perfectly insulated room, temperature at 20C. Add a running refrigerator with the door open, what will happen to the temperature in the room and why?
It will go up.
Fridges only move head from one place to another. They also add a little heat of their own. Also, the light in the fridge will add more.
Now, if the room was at 0c, and the bulb had blown, the temp would stay constant.
Of course, there ain't no such thing as dragon...sorry... perfectly insulated rooms.
How is this humour?
James
Fridges only move head from one place to another. They also add a little heat of their own. Also, the light in the fridge will add more.
Now, if the room was at 0c, and the bulb had blown, the temp would stay constant.
Of course, there ain't no such thing as dragon...sorry... perfectly insulated rooms.
How is this humour?
James
The temp of the room will increase. The electricity used by the fridge needs to be converted into something, which, in the end, is heat.
Back off-topic, I concur, the plane will take off.
Back off-topic, I concur, the plane will take off.
Cal Weldon said:
If it's in my house the beer will disappear first, followed by the Velveeta Cheese, nacho dip, pickled herring, olives ...the room will fill with hydrogen sulfide, methane and other olfactorily offensive molecules...
Two cats, a fridge and a plane in a perfectly insulated room trying to take off ?
The cats will have to be checked in as baggage (unless you hid them in the fridge).
The cats will have to be checked in as baggage (unless you hid them in the fridge).
If the fridge was off in the room, temperature would stay the same....
Power it on
I suspect the heat produced by the motors will add heat.
The cooling elements will try to take some heat from the room (door is open) and then dump it back into the room (inneficiently, but I suspect more efficiently than the process on the coling side)..
So there should be a net gain of temperature...
Even if it was just a fan, the temp would go up, because there is a net increase of energy in the room... through the AC cable
Power it on
I suspect the heat produced by the motors will add heat.
The cooling elements will try to take some heat from the room (door is open) and then dump it back into the room (inneficiently, but I suspect more efficiently than the process on the coling side)..
So there should be a net gain of temperature...
Even if it was just a fan, the temp would go up, because there is a net increase of energy in the room... through the AC cable
Fridge - continued
In South Africa the following will likely take place:
1. The fridge won't work because the power has been cut off most of the day for 'Load Shedding'.
2. The room will lose its insulative properties because people from the 'informal settlements'.will steal 90% of the insulating material to line their shacks. What's left will be pinched by management to use as sound deadening material in the speakers they are building.
3. The insurance weasels won't pay for the spoiled food in the freezer.
4. The plane won't be able to take off because it's broken.
In England the following will likely take place:
1. The fridge will be confiscated by the Dept of the Environment on the grounsds that it's causing degeneration of the ozone layer.
2. The room will lose its perfect insulative properties because Health and Safety Executive have banned the use of the insulating material on the grounds that it has been found to cause cancer in 0.1% of stillborn orang-utangs.
3. The evil insurance weasels won't pay for the spoiled food in the freezer.
4. The plane won't be able to take off because the airport personnel are on strike.
Let's hear it from your part of the world, people. . . .
In South Africa the following will likely take place:
1. The fridge won't work because the power has been cut off most of the day for 'Load Shedding'.
2. The room will lose its insulative properties because people from the 'informal settlements'.will steal 90% of the insulating material to line their shacks. What's left will be pinched by management to use as sound deadening material in the speakers they are building.
3. The insurance weasels won't pay for the spoiled food in the freezer.
4. The plane won't be able to take off because it's broken.
In England the following will likely take place:
1. The fridge will be confiscated by the Dept of the Environment on the grounsds that it's causing degeneration of the ozone layer.
2. The room will lose its perfect insulative properties because Health and Safety Executive have banned the use of the insulating material on the grounds that it has been found to cause cancer in 0.1% of stillborn orang-utangs.
3. The evil insurance weasels won't pay for the spoiled food in the freezer.
4. The plane won't be able to take off because the airport personnel are on strike.
Let's hear it from your part of the world, people. . . .
SY said:
My assumption was that if the room is at 0C, the fridge won't be running, therefore no energy will be transferred to heat.
Unless the thermostat/mains filter capacitor draws current, in which case it will rise.
James
In a perfectly insulated room contained in a perfectly insulated house, repeatedly opening the room's door to have a look at the fridge will release sufficient energy over time to make the temperature of the room unbearable. (A very long time).
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